Dont you think 6m plan is not so critical.? Might be in CA, but most of the world 6m repeaters are dead, kinda do what one wants although should follow some standards such as splits.
On 6m much easier to get separation at 1 MHz.? If you got a good set of duplexers then fine, but often on 6m other methods are used liek1-5/8 coax homebrew.
Here in Florida coordinators tried to force 7.5 kHz channels on 2m.? We are now 15 kHz on 146/147, 20 on 144/145.? And also make all go narrow band.? Did not work, most ignored it for good reason.? And never mind most 2m Ham rigs will not do 7.5kHz.? Very newer ones will, but 90% of what is out there will not.? And so much of the repeater gear is not setup for it.
73, ron, n9ee/r
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Karl,
No, a center fed dipole will not work on the even harmonics of the fundamental freq, 80m not work on 40m,? It has to do with the voltage/current.? At fundamental half wave at the center the current is high and voltage low so low impedance.? At first harmonic is then full wave and current is low and voltage is high, so high impedance.
But will work on odd harmonics.
Now the Off Center Fed, same wire as dipole, but fed off center, I use 1/3rd to 2/3rds split, 1/3rd of the wire on one side of the feed and 2/3rds on the other.? This configuration will work on both odd and even harmonics, 80m will work on 40, 20 & 10m.? But a 4:1 balun is needed, feed impedance is about 200 Ohms so 4:1 to get down to 50 Ohms.? I have a 80m version I use most of? the time.
I do have one of the Balun Designs baluns, 4:1 current, model 4115ocf.? Most of the BD baluns will handle high power some as much as 5kW.? And they are made very well.? They have lots of engineering in their baluns.? But do cost, $100 typical, but I think worth it.
Well there are lots of info on baluns out there.? I have made a few 4:1 single core for use with OCF dipoles, use a 40m for my POTA QRP events, works great on 10, 20 & 40m although have used on other bands with tuner.
You will need a tuner for most multi-band wire antennas especially the OCF, they are not perfect.? I recommend LDG tuners, I really like the AT100, has forward and reverse meters so can see what is going on.? They are automatic and tune over wide range and can handle 125W.?
Good luck with your search.
73, ron, n9ee/r
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Re: GE MII voter complete
On 11/15/2022 10:50 AM, Karl Shoemaker wrote: Thanks, I got that the first time Jim,? I forgot to mention I don't want a ST on the tail of a downlink. Not sure I get what that means... How are you linking sites?
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Re: 6' base station cabinet needed in the Ozarks
Bill I'm forthing at the mouth.? Let's see, 3 days (at least) travel time, putting up with crazy drivers on I-5, sleeping in the truck, meals, threat of being robbed or mugged; naw, I'll have to pass (darn it). Unless you know someone going to Washington with a U haul unit.........
I bet truck shipping service is way more than they are worth, too.
I do have two of them here, so I'll make do. I hate to see good stuff crunched up at the recycle place.
Randy, thanks for the offer but I have enough open racks. Are you registered with SRG? If so let's get on the to chat.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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Re: GE MII voter complete
Thanks, I got that the first time Jim,? I forgot to mention I don't want a ST on the tail of a downlink.
Chris I had some issues with the LGD one. I wrote a supp manual about it on the web site you might wanna check out. It's under the tech area, then under link radios page, scroll down. The one big issue was unsquelched audio remained and was not compatible with my arraignment.? You have an email we can chat?
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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If you go with the fan dipole, check out the SRI (Stanford Research Institute) version.
Jeff - NZ2S
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I suggest you have a look DJ0IP's information.
Steve - N8AR
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Re: GE MII voter complete
Again, you don't need to mod a GE voter for E&M/COR signalling. It's built in.
toggle quoted message
Show quoted text
On 11/14/2022 11:57 PM, Karl Shoemaker wrote: During my 26-year with the State we had the Motorola version.? We used the ST not only for a reference (for the S/N circuit) but also for signalling (what "hams" call cor) which would signal the Centracomm console (VI, etc) and for the term card's M lead. At the far end (mountain top) the E lead would key the remote base (at the time). Later we went to a full repeater but the same function. It was kinda cool, too because this was a full duplex circuit so the CO's at the center could override the inbound traffic in an emergency (if so strapped that way). All the remote receiver's signals were hauled back to the comparator site then the best SIM would have the shelf send it back to the remote site. So audio took a "round trip".
On line later, I came across was some (limited) info on the modification and was hoping there was the same for the GE. I do have a M shelf, but only two cards which are hard to find.? I currently have a 8-channel system and plan for an additional one. Works great, even with a HT around town.? At any rate, it is possible for a system to work without a ST but I don't know how well. The LDG is one example however, does not play well in my configuration thus, they are for sale. The Doug Hall is another example. We use one for our .88 repeater in town. I'm hoping to obtain a cold standby. It's too bad they stopped making them years ago.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at <>
for the current email address.
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Re: GE MII voter complete
I used a DH voter at a previous job on our low band radio system. It worked great after I did some modifications to it because it didn't like 0 DBM audio reference levels.? That one's easy to duplicate. I had the full schematic of it at one time and probably still do somewhere in my files.
Also have an LDG voter. Used one in Dallas at a radio station on a remote receiver setup. One receiver was on the thousand foot bank building in downtown and the other receiver was at the studio. The voter went between them and work like a champ even on the wide band audio. Haven't figured out what I'm going to do with the LDG now. Maybe use it on a 10-m repeater split site with multiple receivers.
I'll look into my GE voter today and see how it's wired. But it's easy to modify for COR even if it uses ST
Chris WB5ITT?
Chris WB5ITT?
On Mon, Nov 14, 2022, 10:57 PM Karl Shoemaker < srg734@...> wrote: During my 26-year with the State we had the Motorola version.? We used the ST not only for a reference (for the S/N circuit) but also for signalling (what "hams" call cor) which would signal the Centracomm console (VI, etc) and for the term card's M lead. At the far end (mountain top) the E lead would key the remote base (at the time). Later we went to a full repeater but the same function. It was kinda cool, too because this was a full duplex circuit so the CO's at the center could override the inbound traffic in an emergency (if so strapped that way). All the remote receiver's signals were hauled back to the comparator site then the best SIM would have the shelf send it back to the remote site. So audio took a "round trip".?
On line later, I came across was some (limited) info on the modification and was hoping there was the same for the GE. I do have a M shelf, but only two cards which are hard to find.? I currently have a 8-channel system and plan for an additional one. Works great, even with a HT around town.? At any rate, it is possible for a system to work without a ST but I don't know how well. The LDG is one example however, does not play well in my configuration thus, they are for sale. The Doug Hall is another example. We use one for our .88 repeater in town. I'm hoping to obtain a cold standby. It's too bad they stopped making them years ago.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Re: GE MII voter complete
During my 26-year with the State we had the Motorola version.? We used the ST not only for a reference (for the S/N circuit) but also for signalling (what "hams" call cor) which would signal the Centracomm console (VI, etc) and for the term card's M lead. At the far end (mountain top) the E lead would key the remote base (at the time). Later we went to a full repeater but the same function. It was kinda cool, too because this was a full duplex circuit so the CO's at the center could override the inbound traffic in an emergency (if so strapped that way). All the remote receiver's signals were hauled back to the comparator site then the best SIM would have the shelf send it back to the remote site. So audio took a "round trip".?
On line later, I came across was some (limited) info on the modification and was hoping there was the same for the GE. I do have a M shelf, but only two cards which are hard to find.? I currently have a 8-channel system and plan for an additional one. Works great, even with a HT around town.? At any rate, it is possible for a system to work without a ST but I don't know how well. The LDG is one example however, does not play well in my configuration thus, they are for sale. The Doug Hall is another example. We use one for our .88 repeater in town. I'm hoping to obtain a cold standby. It's too bad they stopped making them years ago.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Re: Telewave TPRD-1554 Won¡¯t Tune To 600KHz Notch
The loops in my unit don't have any extra caps on them. Telewave support sent me over the schematic for the 600KHz loops and the capacitor value I need. I'm just waiting on the caps to arrive.
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Re: Telewave TPRD-1554 Won¡¯t Tune To 600KHz Notch
Take a look
If you pull the loops from the cavity not tuning you may find the cap is there but cut - common depending on build year and at tune time the cap was nipped for above 154 MHz?
If it's older than same on having to source the mica cap to place in circuit so to get the notch to close in
For note - this duplexer (1554) at 600 KHz, I have not been able to get more than 70db isolation - 100w operation is less than desirable at a typical commercial site - quiet site and coverage gets by
Adding two more cavities and making this a 1556 takes isolation to 95 or better and have seen good operation for 100 and 350w stations
I figured we had a high split duplexer since it was originally purchased for a commercial VHF system. It's odd that one cavity tunes up just fine but the other doesn't. I'm going to try and slapping on the extra capacitors Telewave says we need and seeing what happens.
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On 11/13/2022 12:00 AM, Bob Dengler via groups.io wrote: At 11/12/2022 07:55 PM, you wrote:
Yeah we'd be much better off with a wider split on 6. I only found one 6 meter repeater in SLC: it had a 1 MHz split & so much desense that it was unusable.
Bob NO6B
I run one of the 6 Meter repeaters in SLC on 53.150 with a 1 MHz split and it does not have any desense. It has been on the air for over 2 decades now.
Where did you get your data? My own radio (TH-9800), & observing that while I could kerchunk the repeater all over the place, that's all I could do. It had to be full scale & then some & I had to use 50 watts to get through while the TX was on. Was able to use (I think) 448.150 to duplex. My rough estimate was 20 to 30 dB of desense.
Bob NO6B
There's no doubt in my mind there is something wrong with that machine. If it's using a duplexer (most 6M rptrs in Ohio are split site), it's got a problem or not tuned right. But more likely is just that it has tons of broad band noise to contend with. It's not unusual to see 15-30 dB of desense due to noise anymore. It's considered normal on 6M. Also, 50 watts is on the bottom end of usability for 6M FM. Normal mobile power, and what most repeaters here are balanced to work at is 80-100 watts.
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Ron, they are on my short list however, there's so many choices. I'll have to learn more to make the correct purchase. For example to learn what "ATU" is. Now I know what it's like being at the other end of the learning curve. It's nice to know there are good folks out there to help :) One vendor talks about not to use a dipole for a harmonic use (80 mtr for 40) therefore, I'm also thinking about changing to a "fan" dipole (that's a no brainer for me). Joe, I'll check that group out.  -- - Regards, Karl Shoemaker To contact me, please visit SRG's web site at? for the current email address.
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Most QRP groups talk about baluns.? End Fed Wire antennas are used a lot and they require 9:1 or 49:1 baluns.
Off Center Fed wire antennas need 4:1 balun, there are FB groups.? Prefer current balun and best is the Guandla dual core balun, suppresses CMCs (reflected power).
One of the best manufactures of baluns is Balun Designs (balundesigns.com) , they have a host of very good baluns and lots of info there for their designs.
So many Ham now working with HF wire antennas the simple dipole is not the so much go to antenna any more especially since many want multi-band antennas and a balun is one items widely used.
73, ron, n9ee/r
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Re: GE MII voter complete
*work without status tone (voter tone)... On 11/14/2022 11:23 AM, Jim Barbour via groups.io wrote: I've never seen a GE voter that wouldn't work with status tone. They all have E&M inputs that can be used with the COR output of most rx's-maybe a relay driver board at most.
The only exception is one set of cards I have that was set to work like the Spectra-Tac. They have no level adjustment pot. It sets levels by hearing voter tone and adjusting automatically. But if it has the adjustment pot on the front of the card, it's fine.
On 11/13/2022 9:54 PM, Karl Shoemaker wrote:
Chris, has it been modified to work without a ST?? (status tone)
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at <>
for the current email address.
_._,_._,_
------------------------------------------------------------------------ \
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Re: GE MII voter complete
I've never seen a GE voter that wouldn't work with status tone. They all have E&M inputs that can be used with the COR output of most rx's-maybe a relay driver board at most.
The only exception is one set of cards I have that was set to work like the Spectra-Tac. They have no level adjustment pot. It sets levels by hearing voter tone and adjusting automatically. But if it has the adjustment pot on the front of the card, it's fine.
toggle quoted message
Show quoted text
On 11/13/2022 9:54 PM, Karl Shoemaker wrote: Chris, has it been modified to work without a ST?? (status tone)
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at <>
for the current email address.
_._,_._,_
------------------------------------------------------------------------
Groups.io Links:
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If it's dropping after 4 seconds of key up, you likely have a component going bad in the PA which is heating up.. I had one Quantar that the PA would show fail on the front panel on power up and occasionally it would do a hundred Watts but then it would go into fail mode. I temporarily set it as a 25 watt station and it ran perfectly for a while until I was able to swap the PA for a new one..
On Mon, Nov 14, 2022, 5:18 AM Gary - W6GVS < gvsmith5@...> wrote:
You should stop counting to four, Don. >:-}
73,
Gary - W6GVS
At 10:24 PM 11/13/2022, you wrote:
Been following this topic. I
will try this on my UHF. I adjust it and it keys up 98 Watts into Bird
wattmeter and Bird dummy load.? Then If I count to 4 it drops to 48
watts. I took it off the air but I will put it back on the bench and try
some of this info. UHF 444.750 It is the lower freq. model.
?
Everyone Stay Safe and Healthy
?
Thanks Don KA9QJG
From: [email protected]
[
mailto:[email protected]] On Behalf Of Chris
Boone
Sent: Sunday, November 13, 2022 5:47 PM
To: [email protected]
Subject: Re: [repeater-builder] rf output
?
In the RSS ,
The power out which is showing on the watt meter and then click adjust.
The software will automatically turn the power up or down and try to
correct it to 125 watts out. However I usually set them at a hundred
watts out... Just enter fake number and adjust up or down using the CPS
until the watt meter shows 100 W out and save it.. You're not going to
notice any difference? between 100 and 125
?
Chris WB5ITT
?
?
On Sun, Nov 13, 2022, 5:35 PM sean M0OEG via
<Sean2e0saf=
[email protected]> wrote:
- im looking at doing the tx power alignment in the quantar i assume a
simple rf meter and dummy load is needed to align this..
- if i remember correctly the alignment instructions simply say if the
rf meter and the quantar dont match adjust and then save the settings is
this right..?
- thanks all
|
|
|
You should stop counting to four, Don. >:-}
73,
Gary - W6GVS
At 10:24 PM 11/13/2022, you wrote:
toggle quoted message
Show quoted text
Been following this topic. I
will try this on my UHF. I adjust it and it keys up 98 Watts into Bird
wattmeter and Bird dummy load.? Then If I count to 4 it drops to 48
watts. I took it off the air but I will put it back on the bench and try
some of this info. UHF 444.750 It is the lower freq. model.
?
Everyone Stay Safe and Healthy
?
Thanks Don KA9QJG
From: [email protected]
[
mailto:[email protected]] On Behalf Of Chris
Boone
Sent: Sunday, November 13, 2022 5:47 PM
To: [email protected]
Subject: Re: [repeater-builder] rf output
?
In the RSS ,
The power out which is showing on the watt meter and then click adjust.
The software will automatically turn the power up or down and try to
correct it to 125 watts out. However I usually set them at a hundred
watts out... Just enter fake number and adjust up or down using the CPS
until the watt meter shows 100 W out and save it.. You're not going to
notice any difference? between 100 and 125
?
Chris WB5ITT
?
?
On Sun, Nov 13, 2022, 5:35 PM sean M0OEG via
<Sean2e0saf=
[email protected]> wrote:
- im looking at doing the tx power alignment in the quantar i assume a
simple rf meter and dummy load is needed to align this..
- if i remember correctly the alignment instructions simply say if the
rf meter and the quantar dont match adjust and then save the settings is
this right..?
- thanks all
|
Karl Shoemaker
JeffBanke
Steve-N8AR
Chris Boone WB5ITT
Jared Smudde