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.
--
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Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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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)
--
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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.
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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.
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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
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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
|
Thanks, Jim
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Karl
Go to [email protected] and subscribe. You can ask questions
there.
Discussions of all things antennas. Mostly HF but all bands are
welcome.
73, Jim W7RY
On 11/13/2022 9:13 PM, Karl Shoemaker
wrote:
Anyone know of a group that might like a discussion about HF
baluns??? I'm doing some research on brands and types (current
vers voltage) and core vers air, etc.
This would be other than the SDX group.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
--
Thanks and 73, Jim W7RY
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Re: GE MII voter complete
ok, sounds good. Normally gov, commercial or whatever just procure equipment and install it. I think only the amateurs do mods.? I'll check back another day.
I have the Raytheon one and it works nicely, but "what if" in a lighting hit?
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Don,
That sounds like it is going into PA rollback and reducing power.? Check your status panel and logs in WinRSS to see what those say when it is doing that.? If you have high VSWR in normal operating mode the PA will rollback and generally give you an alarm.? In calibration mode those protections are not active so be careful.? Also keep in mind that on UHF the max power is 110W and I never set them higher than 100W.
Dan Woodie, CETsr
KC8ZUM?
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Re: GE MII voter complete
I don't know but I'll check it...I bought it a while back and the guy said it was pulled from service ..but didn't get into the details?
On Sun, Nov 13, 2022, 8:54 PM Karl Shoemaker < srg734@...> 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.
|
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 of 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
toggle quoted message
Show quoted text
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 ? 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
|
Anyone know of a group that might like a discussion about HF baluns??? I'm doing some research on brands and types (current vers voltage) and core vers air, etc.
This would be other than the SDX group.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Calibrate it for the actual rated power then turn the power down in the channel settings.? Intentionally calibrating the station inaccurately is just a horrible idea.? A 125W station can be turned down as low as 20W in the channel settings.? There is absolutely no reason to intentionally mis-calibrate this setting.? I do, however, concur that setting the power out to 80-100W instead of the full 125W is a good idea as the gain difference is minimal and it should increase service life for both the PA and PSU.
Keep in mind that during calibration all protection circuits are disabled.? You want to use as short of a cable as possible to a known-accurate meter.? I often just use a good quality right-angle N and a Male to Male N to avoid cables altogether.??
For a 125W station you should be using a meter setup for 150W full-scale max if using an analog meter since they are only calibrated at full-scale.? You want to be in the top 15-25% of the scale or accuracy will suffer.? Also keep in mind that you may need to enter the power you read and hit apply 2-3 times before you get the power to spec.? Each time you enter the power read it should get you closer.? By the 2nd or 3rd time it should be right on spec.? If it is less than 90W initially you need to check your cables, connections, and meter.? I once saw a "Trained" tech improperly calibrate several Quantars to over 200W because his meter was screwed up (a mistreated Bird 43).? Thankfully I caught it and re-calibrated them using my meter before the smoke was let out.
Dan Woodie, CETsr KC8ZUM
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
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
|
Re: GE MII voter complete
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.
|
Karl Shoemaker
Jared Smudde
Chris Boone WB5ITT