Re: Coupling loop question...
One turn it will be then.? As for measuring Q, I'm a long ways from
that :).? I'm very slowly learning to speak electronics.
Thanks!
Earl
On 8/28/24 23:23, Andrew Russell wrote:
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Show quoted text
G¡¯day Earl,
I have found that one turn works well.
You can use the spacing to the tuned coil to
adjust the coupling.
I think there is a way to estimate a 50Ohm
match point but it will depend on the Q of the RC circuit if
you can measure that somehow.
Andrew VK5CV.
I'm building a medium wave antenna, 24" x 24" box loop, 20
AWG wire, 365 pf air gap variable capacitor (at least that's
what I'm starting with).? I'd certainly appreciate suggestions
on the best design for a coupling loop for such an antenna,
thanks!
?
Earl
|
Re: Coupling loop question...
G¡¯day Earl,
I have found that one turn works well.
You can use the spacing to the tuned coil to adjust the coupling.
I think there is a way to estimate a 50Ohm match point but it will depend on the Q of the RC circuit if you can measure that somehow.
Andrew VK5CV.
toggle quoted message
Show quoted text
I'm building a medium wave antenna, 24" x 24" box loop, 20 AWG wire, 365 pf air gap variable capacitor (at least that's what I'm starting with).? I'd certainly appreciate suggestions on the best design for a coupling loop for such an antenna, thanks!
?
Earl
|
Coupling loop question...
I'm building a medium wave antenna, 24" x 24" box loop, 20 AWG wire, 365 pf air gap variable capacitor (at least that's what I'm starting with).? I'd certainly appreciate suggestions on the best design for a coupling loop for such an antenna, thanks!
?
Earl
|
Re: Rotators for loop antenna (continued)...8
Thanks, Everett! Simon On Mon, Aug 26, 2024 at 7:30?AM Everett N4CY via groups.io <everettsharp@...> wrote:
Simon, I did not weigh it, but there was very little weight to it. The aluminum tubing is very light IN WEIGHT.
Everett N4CY
In a message dated 8/26/2024 9:19:53 AM Central Daylight Time, 1rfsam@... writes:
Hi Everett,
Do you by any chance remember what is the weight of your assembled
loop plus Fiberglass pole?
Regards,
Simon
On Mon, Aug 26, 2024 at 7:17?AM Everett N4CY via groups.io
<everettsharp@...> wrote:
Hi Rolf,
I used a PVC conduit fitting and filled in the gaps with potting compound. I cut out an 1/8" 6061-T6 aluminum plate and mounted the PVC fitting to it then added the U bolts.
Everett N4CY
In a message dated 8/26/2024 9:09:09 AM Central Daylight Time, groups@... writes:
Hi Everett,
Nice work.
from where did you get the housing for the amplifier with the clamps?
73, Rolf
__________________________________________________________________
PLATH SIR-2115, G69/31DDC, PERSEUS, SIGNALHOUND , AFEDRI, GRX-LAN
T2FD, G5RV, WELLBROOK 1530/ALA-100, DISCONE, NTi GA3005, STAMPFL X ONE
go2MONITOR, go2DECODE, Signal Analyzer
From: [email protected] <[email protected]> On Behalf Of Everett N4CY via groups.io
Sent: Friday, August 23, 2024 9:37 PM
To: [email protected]
Subject: Re: [loopantennas] Rotators for loop antenna (continued)...8
Guys,
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
Everett N4CY
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
Thanks for the suggestion, Fred!
Simon
On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io
<n40cla@...> wrote:
Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on. Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor. The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod.
Fred
N4CLA
On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
I did this to to 2 alliance rotors and an RCA over the years. Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod! Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
You can always "slit" or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice). Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor. Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
The one cavet is to not ever mount a rotator where it may sit in water! Don't set a rotator outside unless it is elevated and vertical. If your flat roof floods and water comes up to the rotator, that's bad.
Sorry 'bot running on like this. I'm faithful follower here!
Holmzie n2exg
|
Re: Rotators for loop antenna (continued)...8
Thanks for the info ? 73, Rolf __________________________________________________________________ PLATH SIR-2115, G69/31DDC, PERSEUS, ?SIGNALHOUND , AFEDRI, GRX-LAN T2FD, G5RV, WELLBROOK 1530/ALA-100, DISCONE, NTi GA3005, STAMPFL X ONE go2MONITOR, go2DECODE, Signal Analyzer ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Everett N4CY via groups.io
Sent: Monday, August 26, 2024 4:17 PM
To: [email protected]
Subject: Re: [loopantennas] Rotators for loop antenna (continued)...8? I used a PVC conduit fitting and filled in the gaps with potting compound. I cut out an 1/8" 6061-T6 aluminum plate and mounted the PVC fitting to it then added the U bolts.
In a message dated 8/26/2024 9:09:09 AM Central Daylight Time, groups@... writes:
Hi Everett, ? Nice work. ? from where did you get the housing for the amplifier with the clamps? ? 73, Rolf __________________________________________________________________ PLATH SIR-2115, G69/31DDC, PERSEUS, ?SIGNALHOUND , AFEDRI, GRX-LAN T2FD, G5RV, WELLBROOK 1530/ALA-100, DISCONE, NTi GA3005, STAMPFL X ONE go2MONITOR, go2DECODE, Signal Analyzer ? ? Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
Thanks for the suggestion, Fred!
Simon
On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io
<n40cla@...> wrote:
>
> Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod.
>
> Fred
> N4CLA
>
> On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
>>
>> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
>>
>> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
>>
>> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
>>
>> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
>>
>> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad.
>>
>> Sorry 'bot running on like this.? I'm faithful follower here!
>>
>> Holmzie n2exg
>
>
|
Re: Rotators for loop antenna (continued)...8
Simon, I did not weigh it, but there was very little weight to it. The aluminum tubing is very light IN WEIGHT.
?
Everett N4CY
?
In a message dated 8/26/2024 9:19:53 AM Central Daylight Time, 1rfsam@... writes:
?
Hi Everett, Do you by any chance remember what is the weight of your assembled loop plus Fiberglass pole? Regards, Simon On Mon, Aug 26, 2024 at 7:17?AM Everett N4CY via groups.io <everettsharp@...> wrote: > > Hi Rolf, > > I used a PVC conduit fitting and filled in the gaps with potting compound. I cut out an 1/8" 6061-T6 aluminum plate and mounted the PVC fitting to it then added the U bolts. > > Everett N4CY > > In a message dated 8/26/2024 9:09:09 AM Central Daylight Time, groups@... writes: > > > Hi Everett, > > > > Nice work. > > > > from where did you get the housing for the amplifier with the clamps? > > > > 73, Rolf > > __________________________________________________________________ > > PLATH SIR-2115, G69/31DDC, PERSEUS,? SIGNALHOUND , AFEDRI, GRX-LAN > > T2FD, G5RV, WELLBROOK 1530/ALA-100, DISCONE, NTi GA3005, STAMPFL X ONE > > go2MONITOR, go2DECODE, Signal Analyzer > > > > From: [email protected] < [email protected]> On Behalf Of Everett N4CY via groups.io > Sent: Friday, August 23, 2024 9:37 PM > To: [email protected]> Subject: Re: [loopantennas] Rotators for loop antenna (continued)...8 > > > > Guys, > > > > Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls. > > > >? > > > > Everett N4CY > > > In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes: > > > > Thanks for the suggestion, Fred! > Simon > > On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io > <n40cla@...> wrote: > > > > Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod. > > > > Fred > > N4CLA > > > > On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote: > >> > >> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod. > >> > >> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water). > >> > >> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!). > >> > >> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts... > >> > >> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad. > >> > >> Sorry 'bot running on like this.? I'm faithful follower here! > >> > >> Holmzie n2exg > > > > > > > > > > >
|
Re: Rotators for loop antenna (continued)...8
Hi Everett, Do you by any chance remember what is the weight of your assembled loop plus Fiberglass pole? Regards, Simon On Mon, Aug 26, 2024 at 7:17?AM Everett N4CY via groups.io <everettsharp@...> wrote:
Hi Rolf,
I used a PVC conduit fitting and filled in the gaps with potting compound. I cut out an 1/8" 6061-T6 aluminum plate and mounted the PVC fitting to it then added the U bolts.
Everett N4CY
In a message dated 8/26/2024 9:09:09 AM Central Daylight Time, groups@... writes:
Hi Everett,
Nice work.
from where did you get the housing for the amplifier with the clamps?
73, Rolf
__________________________________________________________________
PLATH SIR-2115, G69/31DDC, PERSEUS, SIGNALHOUND , AFEDRI, GRX-LAN
T2FD, G5RV, WELLBROOK 1530/ALA-100, DISCONE, NTi GA3005, STAMPFL X ONE
go2MONITOR, go2DECODE, Signal Analyzer
From: [email protected] <[email protected]> On Behalf Of Everett N4CY via groups.io
Sent: Friday, August 23, 2024 9:37 PM
To: [email protected]
Subject: Re: [loopantennas] Rotators for loop antenna (continued)...8
Guys,
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
Everett N4CY
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
Thanks for the suggestion, Fred!
Simon
On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io
<n40cla@...> wrote:
Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on. Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor. The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod.
Fred
N4CLA
On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
I did this to to 2 alliance rotors and an RCA over the years. Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod! Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
You can always "slit" or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice). Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor. Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
The one cavet is to not ever mount a rotator where it may sit in water! Don't set a rotator outside unless it is elevated and vertical. If your flat roof floods and water comes up to the rotator, that's bad.
Sorry 'bot running on like this. I'm faithful follower here!
Holmzie n2exg
|
Re: Rotators for loop antenna (continued)...8
Hi Rolf,
?
I used a PVC conduit fitting and filled in the gaps with potting compound. I cut out an 1/8" 6061-T6 aluminum plate and mounted the PVC fitting to it then added the U bolts.
?
Everett N4CY
In a message dated 8/26/2024 9:09:09 AM Central Daylight Time, groups@... writes:
?
Hi Everett,
?
Nice work.
?
from where did you get the housing for the amplifier with the clamps?
?
73, Rolf
__________________________________________________________________
PLATH SIR-2115, G69/31DDC, PERSEUS, ?SIGNALHOUND , AFEDRI, GRX-LAN
T2FD, G5RV, WELLBROOK 1530/ALA-100, DISCONE, NTi GA3005, STAMPFL X ONE
go2MONITOR, go2DECODE, Signal Analyzer
?
?
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
Thanks for the suggestion, Fred!
Simon
On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io
<n40cla@...> wrote:
>
> Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod.
>
> Fred
> N4CLA
>
> On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
>>
>> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
>>
>> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
>>
>> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
>>
>> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
>>
>> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad.
>>
>> Sorry 'bot running on like this.? I'm faithful follower here!
>>
>> Holmzie n2exg
>
>
|
Re: Rotators for loop antenna (continued)...8
Hi Everett, ? Nice work. ? from where did you get the housing for the amplifier with the clamps? ? 73, Rolf __________________________________________________________________ PLATH SIR-2115, G69/31DDC, PERSEUS, ?SIGNALHOUND , AFEDRI, GRX-LAN T2FD, G5RV, WELLBROOK 1530/ALA-100, DISCONE, NTi GA3005, STAMPFL X ONE go2MONITOR, go2DECODE, Signal Analyzer ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Everett N4CY via groups.io
Sent: Friday, August 23, 2024 9:37 PM
To: [email protected]
Subject: Re: [loopantennas] Rotators for loop antenna (continued)...8? Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
Thanks for the suggestion, Fred!
Simon
On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io
<n40cla@...> wrote:
>
> Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod.
>
> Fred
> N4CLA
>
> On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
>>
>> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
>>
>> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
>>
>> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
>>
>> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
>>
>> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad.
>>
>> Sorry 'bot running on like this.? I'm faithful follower here!
>>
>> Holmzie n2exg
>
>
|
Re: Kits and Parts sad news.
Best news all year, my new right knee not withstanding.
Kits and Parts has been my go to for odd RF parts.
The RF amps they no longer offer were a wonderful bargain for the price.
?
|
Re: Kits and Parts sad news.
You are right, Diz¡¯ passing is very sad. This is however old news: Kits And Parts was sold to Mike Maiorana ?KU4QO. So hopefully there is no reason to think that this will change any time soon.
?
?Karl Heinz - K5KHK
|
Kits and Parts has been my go to source for ferrites and other RF odds and ends. A friend just told me Dieter "Diz" Gentzow, W8DIZ, lost his battle with his illness yesterday, March 3rd, 2024. I have no idea how long Kits and Parts will continue, so it might be a good idea to think about parts they have that you will need and get that order in pronto.
|
Re: Rotators for loop antenna (continued)...8
toggle quoted message
Show quoted text
On Fri, Aug 23, 2024 at 3:50?PM Everett N4CY via <everettsharp= [email protected]> wrote:
Fred,
?
It is an RCA and it works well, when I can keep the squires from eating my wires.
?
Everett
In a message dated 8/23/2024 2:46:12 PM Central Daylight Time, n40cla@... writes:
?
Good afternoon Everett,
?
Fred Moore here, N4CLA
?
Can you tell me what model rotator you are using?? I might be interested in obtaining one.
?
Fred
On Fri, Aug 23, 2024 at 3:37?PM Everett N4CY via <everettsharp= [email protected]> wrote:
Guys,
?
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
?
?
?
Everett N4CY
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
?
Thanks for the suggestion, Fred! Simon On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via <n40cla= [email protected]> wrote: > > Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod. > > Fred > N4CLA > > On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via <p.holmzie= [email protected]> wrote: >> >> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod. >> >> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water). >> >> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!). >> >> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts... >> >> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad. >> >> Sorry 'bot running on like this.? I'm faithful follower here! >> >> Holmzie n2exg > >
?
?
|
Re: Rotators for loop antenna (continued)...8
Fred,
?
It is an RCA and it works well, when I can keep the squires from eating my wires.
?
Everett
In a message dated 8/23/2024 2:46:12 PM Central Daylight Time, n40cla@... writes:
?
Good afternoon Everett,
?
Fred Moore here, N4CLA
?
Can you tell me what model rotator you are using?? I might be interested in obtaining one.
?
Fred
On Fri, Aug 23, 2024 at 3:37?PM Everett N4CY via <everettsharp= [email protected]> wrote:
Guys,
?
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
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Everett N4CY
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
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Thanks for the suggestion, Fred! Simon On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via <n40cla= [email protected]> wrote: > > Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod. > > Fred > N4CLA > > On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via <p.holmzie= [email protected]> wrote: >> >> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod. >> >> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water). >> >> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!). >> >> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts... >> >> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad. >> >> Sorry 'bot running on like this.? I'm faithful follower here! >> >> Holmzie n2exg > >
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Re: Rotators for loop antenna (continued)...8
Yes it is an RCA Rotor..
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Everett
In a message dated 8/23/2024 2:41:47 PM Central Daylight Time, 1rfsam@... writes:
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Thank you, Everett, looks great! That's also RCA rotator, right? Looks like you have about 4' between the rotator and the loop? In my case I have ~10ft mast and it's somewhat center heavy (big IP67 PVC box). Regards, Simon On Fri, Aug 23, 2024 at 12:37?PM Everett N4CY via groups.io <everettsharp@...> wrote: > > Guys, > > Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls. > >? > > Everett N4CY > > In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes: > > > Thanks for the suggestion, Fred! > Simon > > On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io > <n40cla@...> wrote: > > > > Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod. > > > > Fred > > N4CLA > > > > On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote: > >> > >> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod. > >> > >> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water). > >> > >> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!). > >> > >> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts... > >> > >> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad. > >> > >> Sorry 'bot running on like this.? I'm faithful follower here! > >> > >> Holmzie n2exg > > > > > > > > > >
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Re: Rotators for loop antenna (continued)...8
Good afternoon Everett,
Fred Moore here, N4CLA
Can you tell me what model rotator you are using?? I might be interested in obtaining one.
Fred
On Fri, Aug 23, 2024 at 3:37?PM Everett N4CY via <everettsharp= [email protected]> wrote:
Guys,
?
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
?
?
?
Everett N4CY
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
?
Thanks for the suggestion, Fred! Simon On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via <n40cla= [email protected]> wrote: > > Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod. > > Fred > N4CLA > > On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via <p.holmzie= [email protected]> wrote: >> >> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod. >> >> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water). >> >> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!). >> >> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts... >> >> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad. >> >> Sorry 'bot running on like this.? I'm faithful follower here! >> >> Holmzie n2exg > >
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Re: Rotators for loop antenna (continued)...8
Thank you, Everett, looks great! That's also RCA rotator, right? Looks like you have about 4' between the rotator and the loop? In my case I have ~10ft mast and it's somewhat center heavy (big IP67 PVC box). Regards, Simon On Fri, Aug 23, 2024 at 12:37?PM Everett N4CY via groups.io <everettsharp@...> wrote:
Guys,
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
Everett N4CY
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
Thanks for the suggestion, Fred!
Simon
On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io
<n40cla@...> wrote:
Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on. Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor. The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod.
Fred
N4CLA
On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
I did this to to 2 alliance rotors and an RCA over the years. Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod! Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
You can always "slit" or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice). Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor. Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
The one cavet is to not ever mount a rotator where it may sit in water! Don't set a rotator outside unless it is elevated and vertical. If your flat roof floods and water comes up to the rotator, that's bad.
Sorry 'bot running on like this. I'm faithful follower here!
Holmzie n2exg
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Re: Rotators for loop antenna (continued)...8
Guys,
?
Here is my 4' loop that I rolled out of 1.5" 6061-T6 Aluminum tubing. I am using fiberglass military tent poles for the support mast. The amplifier is one of my Improved LZ1AQ loop amps. It is mounted on a rotor. I am able to get 28 to 29dB nulls.
?
?
?
Everett N4CY
In a message dated 8/23/2024 2:28:57 PM Central Daylight Time, 1rfsam@... writes:
?
Thanks for the suggestion, Fred! Simon On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io <n40cla@...> wrote: > > Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on.? Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor.? The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod. > > Fred > N4CLA > > On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote: >> >> An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod. >> >> I did this to to 2 alliance rotors and an RCA over the years.? Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod!? Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water). >> >> You can always "slit"? or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice).? Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!). >> >> I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor.? Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts... >> >> The one cavet is to not ever mount a rotator where it may sit in water!? Don't set a rotator outside unless it is elevated and? vertical.? If your flat roof floods and water comes up to the rotator, that's bad. >> >> Sorry 'bot running on like this.? I'm faithful follower here! >> >> Holmzie n2exg > >
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Re: Rotators for loop antenna (continued)...8
Thanks for the suggestion, Fred! Simon On Fri, Aug 23, 2024 at 12:12?PM Fred Moore via groups.io <n40cla@...> wrote:
Why don't you place your rotor under the tripod, put a real thrust bearing on the top of the tripod that the real mast will sit on. Then place a smaller pipe on the rotor that slides up into the mast and bolt the two pipes together. This way all the weight above the rotor actually is sitting on the top of the tripod and not on the rotor. The only thing the rotor is doing now is rotating a 2 ft or 3 ft piece of pipe and the bolt through the rotor pipe and the mast pipe is turning the weight above the tripod.
Fred
N4CLA
On Fri, Aug 23, 2024 at 3:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
I did this to to 2 alliance rotors and an RCA over the years. Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod! Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
You can always "slit" or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice). Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor. Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
The one cavet is to not ever mount a rotator where it may sit in water! Don't set a rotator outside unless it is elevated and vertical. If your flat roof floods and water comes up to the rotator, that's bad.
Sorry 'bot running on like this. I'm faithful follower here!
Holmzie n2exg
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Re: Rotators for loop antenna (continued)...8
Thank you for your subjections! I was thinking about mounting rotator under the tripod. But then I will need to extend the mast itself. It's doable too. I think I will leave the rotator where it sits right now but mount a parallel big diameter Schedule 80 PVC pipe in parallel that will be attached to the tripod via clamps and hold the bearing right under the first loop. I can make this PVC also to rest on the balcony's floor to make things more stable. Regards, Simon On Fri, Aug 23, 2024 at 12:01?PM Holmzie N2EXG via groups.io <p.holmzie@...> wrote:
An advantage is not having to run guy wires and more penitrations, plus the support will all come from the existing tripod.
I did this to to 2 alliance rotors and an RCA over the years. Some of my other (easier) solutions were to mount the rotator UNDER ...at the bottom of the tripod! Make an insulating bearing out of PVC at the top of the tripod. Make a plate or bracket to firmly mount the rotator base, (above any possible standing water).
You can always "slit" or stack one or more PVC diameters or sections, to makeup a thicker homegrowen bearing, glue 'em up, glue 'em together) to make 'em thicker, (even using hose clamps or a vice). Inserting the PVC spacer and clamp it down at the top of the tripod just enough to allow free rotation (with a little grease!).
I also used hose clamps to hold the slit tripod's PVC bearings to the right diameter while loosely inserting the mast through the tripod and the rotor. Once in place, I slowly tightened everything up so the greased PVC bearing was held firmly In place by the groved indentations of the bolts...
The one cavet is to not ever mount a rotator where it may sit in water! Don't set a rotator outside unless it is elevated and vertical. If your flat roof floods and water comes up to the rotator, that's bad.
Sorry 'bot running on like this. I'm faithful follower here!
Holmzie n2exg
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Everett N4CY