Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
Hey Steve!
?
Was it you who was making FLG100 replacements? If so, let me know the spec's and price per module.
?
How are you doing there in sunny, hot Arizona? We visited AZ in April the first time in 6 years. Still miss the Prescott area.....
?
Thanks!
?
Dave Aichelman? ? ?N7NZH? ? ?Grants Pass, Oregon
|
Add me to the list of those who hope you'll stay.? A portion of that particular post may have wandered a bit into the realm of "unusual", but certainly nothing that was out-of-bounds or requiring an apology.
|
Don't know why anyone made such a fuss over your initial post. RFI is an issue most of us face, no apology needed. Can't have any deviation from the same recycled subjects and seller promotions I guess. Now I'm gonna have to go back and see what happened. I just glossed at the subject line, because, MJ, RFI, loops... Yeah, 1:1:1, and hand-in-hand. Thought noting at all about it, planned to catch up later, see if there has been any major advancements, like someone starting to think about maybe doing something before the next big bang. Having chased RFI for decades, RFI, loop antennas, and the MAJOR issue with growing sites, how they are identified, and the extreme involvement of the ARRL, FCC, and local law enforcement makes MJ pretty much synonymous with RFI, and the equipment to locate it, or, not prevent it, but allow one to still function to an extent when in the presence of it- loop antennas. Almost equally bad, if not more so, as it's rapidly overtaking growers for complete obliteration of anything RF related, solar. Kurt
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Don't know why anyone made such a fuss over your initial post. RFI is an issue most of us face, no apology needed. Can't have any deviation from the same recycled subjects and seller promotions I guess.
|
Let this ¡®blow over¡¯! ?No more responses to it. ? ?Move on.?
Back to antennas.?
??
toggle quoted message
Show quoted text
On Sep 6, 2024, at 11:23?AM, rfsam <1rfsam@...> wrote:
?Hi,
Please don't leave this group. I think others are overreacting to your
initial post. Don't feel to bad about it.
Regards,
Simon
|
Hi,
Please don't leave this group. I think others are overreacting to your
initial post. Don't feel to bad about it.
Regards,
Simon
|
Hi Terrence,
?
It's your choice, but don't feel too bad, some folks are just too sensitive about stuff that they consider to be off-topic, or may occasionally be misjudged.
?
It's just human nature, and I've inadvertently offended folks when that was not my intention. I like to push boundaries, test theories, and stop myths being propagated ad infinitum. As a result, I've been banned from many forums for not towing the party line, or supporting the other fanboys.
?
Social media has allowed tribes to coalesce, without their beliefs being challenged, this is dangerous and does not promote rational discussion. I also like threads that occasionally drift off-topic, as sometimes you learn new things, or view existing stuff from a different perspective.
?
The world would be very boring if we all conformed to an "acceptable" template, we need a mix of voices and experiences to remain a (almost) balanced society.
?
I wish you well in your endeavours.
?
Regards,
?
Martin
?
On Fri, Sep 6, 2024 at 10:23 AM, wn4isx wrote:
Good luck to group members and, to those offended by my eterna-post, I'm sorry
|
Given my off topic thread won't die, it's clear I'm not up to be a moderator on this group.
?
Meaning well isn't enough in life and I demonstrated an atrocious failure in judgment by starting the eterna-thread, a failure of judgment that demonstrates I'm not suited to be a moderator.
?
I hope the remaining moderators can continue to act as weed killers and kill each and every post regarding MJ growhouses.
?
I've enjoyed being a member of this group, learned a lot, I'd like to thank Martin for confirming a goniometer is less then optimal for electronically steering the aim point of two cross phased loops and I'd like to thank Everett N4CY for offering high performance loop at an extremely reasonable price.
?
This would turn into something the length of War and Peace if I tried to thank everyone who has helped me understand the subtleties of loop antennas, so a bit thank you to the entire group.
?
?
I've learned more about loops in the few years I was a member of the Loop Antennas IO Group, but I believe it is time for me to leave the group.
?
Good luck to group members and, to those offended by my eterna-post, I'm sorry. Accepting responsibility means accepting rational outcomes.
|
Re: Coupling loop question...
I started with a 1T coupling loop (haven't tried 2T or 3T yet) and
wound up using 9T around my 24" square frame.? I don't have a way to
measure inductance but with the old capacitor I have I can tune from
520 to almost 1700, so I figure that's OK for my first effort.?
Between tuning and rotating I can get most stations to come in
clearly.? This is with everything wire nutted together so I figure
that when everything is soldered it might be even better.
Earl
On 8/29/24 18:35, Gedas wrote:
toggle quoted message
Show quoted text
By all means
build your loop then fix it's location & orientation on a
known station and establish it's performance with a 1T coupling
loop. Then quickly add a 2nd turn and reevaluate, then add a 3rd
turn and see which was best.? For my loop I did some hand
calculations for the predicted inductance per turn then
estimated the number of turns to get me over my target of 3 mH.
This allowed my variable capacitor box to achieve resonance from
about 25 kHz to about 350 kHz using all the turns in the loop.?
If I needed to cover higher frequencies I simply moved my gator
clip to a lower number of turns and retuned the cap box. This
way I could cover up through the high end of the BC band.? Here
was the measured inductance of that loop as a function of number
of turns.
Gedas, W8BYA EN70JT
Light travels faster than sound.....
This is why some people appear bright until you hear them speak.
On 8/29/2024 4:05 PM, Earl Parker II
wrote:
I shall experiment.? Thanks for the photo.? It looks like it's
at least 4 ft square.? How did you arrive at the size and number
of turns of wire?? I know there are formulas/calculators; did
you use one of those or did other considerations guide you?
Earl
On 8/29/24 15:43, Gedas wrote:
1-T
may or may not turn out to be the best solution for your
setup. There are usually too many variables to say in general.
But in my case 1T did turn out to provide the greatest
coupling with a nice frequency response. But my interests are
generally VLF.
Below is a URL of the tuned loop I made. I was able to quickly
evaluate signal strengths and antenna characteristics using
1T, 2T, and 3T.? 2T got crappy and 3T was almost useless.
Again YMMV so I suggest you just try different turns. It only
takes a few minutes to add a turn and does not have to look
pretty for experimental purposes.? GL
Gedas, W8BYA EN70JT
Light travels faster than sound.....
This is why some people appear bright until you hear them speak.
On 8/29/2024 12:00 AM, Earl
Parker II wrote:
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:
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...
By all means
build your loop then fix it's location & orientation on a
known station and establish it's performance with a 1T coupling
loop. Then quickly add a 2nd turn and reevaluate, then add a 3rd
turn and see which was best.? For my loop I did some hand
calculations for the predicted inductance per turn then estimated
the number of turns to get me over my target of 3 mH. This allowed
my variable capacitor box to achieve resonance from about 25 kHz
to about 350 kHz using all the turns in the loop.? If I needed to
cover higher frequencies I simply moved my gator clip to a lower
number of turns and retuned the cap box. This way I could cover up
through the high end of the BC band.? Here was the measured
inductance of that loop as a function of number of turns.
Gedas, W8BYA EN70JT
Light travels faster than sound.....
This is why some people appear bright until you hear them speak.
On 8/29/2024 4:05 PM, Earl Parker II
wrote:
toggle quoted message
Show quoted text
I
shall experiment.? Thanks for the photo.? It looks like it's at
least 4 ft square.? How did you arrive at the size and number of
turns of wire?? I know there are formulas/calculators; did you use
one of those or did other considerations guide you?
Earl
On 8/29/24 15:43, Gedas wrote:
1-T
may or may not turn out to be the best solution for your setup.
There are usually too many variables to say in general. But in
my case 1T did turn out to provide the greatest coupling with a
nice frequency response. But my interests are generally VLF.
Below is a URL of the tuned loop I made. I was able to quickly
evaluate signal strengths and antenna characteristics using 1T,
2T, and 3T.? 2T got crappy and 3T was almost useless. Again YMMV
so I suggest you just try different turns. It only takes a few
minutes to add a turn and does not have to look pretty for
experimental purposes.? GL
Gedas, W8BYA EN70JT
Light travels faster than sound.....
This is why some people appear bright until you hear them speak.
On 8/29/2024 12:00 AM, Earl Parker
II wrote:
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:
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...
I shall experiment.? Thanks for the photo.? It looks like it's at
least 4 ft square.? How did you arrive at the size and number of
turns of wire?? I know there are formulas/calculators; did you use
one of those or did other considerations guide you?
Earl
On 8/29/24 15:43, Gedas wrote:
toggle quoted message
Show quoted text
1-T may or may
not turn out to be the best solution for your setup. There are
usually too many variables to say in general. But in my case 1T
did turn out to provide the greatest coupling with a nice
frequency response. But my interests are generally VLF.
Below is a URL of the tuned loop I made. I was able to quickly
evaluate signal strengths and antenna characteristics using 1T,
2T, and 3T.? 2T got crappy and 3T was almost useless. Again YMMV
so I suggest you just try different turns. It only takes a few
minutes to add a turn and does not have to look pretty for
experimental purposes.? GL
Gedas, W8BYA EN70JT
Light travels faster than sound.....
This is why some people appear bright until you hear them speak.
On 8/29/2024 12:00 AM, Earl Parker II
wrote:
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:
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...
1-T may or may
not turn out to be the best solution for your setup. There are
usually too many variables to say in general. But in my case 1T
did turn out to provide the greatest coupling with a nice
frequency response. But my interests are generally VLF.
Below is a URL of the tuned loop I made. I was able to quickly
evaluate signal strengths and antenna characteristics using 1T,
2T, and 3T.? 2T got crappy and 3T was almost useless. Again YMMV
so I suggest you just try different turns. It only takes a few
minutes to add a turn and does not have to look pretty for
experimental purposes.? GL
Gedas, W8BYA EN70JT
Light travels faster than sound.....
This is why some people appear bright until you hear them speak.
On 8/29/2024 12:00 AM, Earl Parker II
wrote:
toggle quoted message
Show quoted text
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:
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...
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:
toggle quoted message
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
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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
>
>
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Everett N4CY