--- In Repeater-Builder@yahoogroups.com, WI4L [EMAIL PROTECTED] wrote:
--- In Repeater-Builder@yahoogroups.com, kf8yk ericbartholomew@
wrote:
Cleaning out the basement, found a RCA 500 UHF repeater.
If anyone could use this, it's free for the asking. Pick up in
Cleveland, Ohio or
I've programmed a 27C64Q-200 EPROM with the hex below which should be
Channel 0 450MHZ T855-20 but its not working i only have an EPROM in
the RX module because the TX module needs the TCXO fitted but
shouldn't it still receive on 450MHZ? also the carrier button was
stuck on and forward was
Looking for db of isolation need for a 1.7mhz split repeater on the 6
meter band. If using split antennas what would be the vertical
seperation needed? Thanks.
Eric
N7JYS
Joe Burkleo wrote:
Kevin
Thanks for the information. I figured that if anyone had tried it you
would be aware.
I was just looking for more than 30 Watts out.
Scott and I have been successful in building small IPA's (intermediate
power amplifiers) that take the power from the exciter and
Well, I don't understand it, but yesterday afternoon the repeater seemed
to revert to a bad case of desense. Today I will try to determine why
this happened. Such is life!
JohnT
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of John
Kevin,
I've been meaning to postabout a similar project, and this prompts me to ask -
have you done this to rebuild a UHF amp?
I have several dead TLD-1713 UHF 75w PAs, and need a good PA or two at the
moment. Rather than messing with trying to find Moto transistors, caps, and
Z-matches, I
Desense (actual Cable-Q contributions)
Hi John,
There is a case where you can actually be fighting a complex
problem with unwanted contributions actually made/introduced
by the cable (feed-line) Q. To be more specific some combination
of the antenna, duplexer, hardware circuit(s) in
How much transmit power Eric?
And for some opinions... what type of radio/repeater gear do
you plan on using? ... and why the 1.7 MHz split?
cheers,
s.
Eric Harrison [EMAIL PROTECTED] wrote:
Looking for db of isolation need for a 1.7mhz split repeater on the 6
meter band. If using
First thing is to replace the suspect cable rather than trusting the
home-made shielding that was added. I also wonder if the transmitter is
going spurious. Was that checked and ruled out? I don't recall.
Chuck
WB2EDV
John Transue [EMAIL PROTECTED] wrote:
Well, I don't understand it, but
If you want to see how many hoops we jumped through to convert a high-band VHF
Micor to 220 go here: There's a PA link near the top.
http://home.comcast.net/~micorrepeater/
de WD7F
John in Tucson
- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED] ;
Forgot to addI never persued the SWR power reducing beyond the simple
divider. Our converstion won't drop power all the way to zero when there's an
SWR problem..yet. Once, the controller got confused and keyed the repeater
over night at about 60 watts out without a problem. I think it's
cisfuk wrote:
I've programmed a 27C64Q-200 EPROM with the hex below which should be
Channel 0 450MHZ T855-20 but its not working i only have an EPROM in
the RX module because the TX module needs the TCXO fitted but
shouldn't it still receive on 450MHZ? also the carrier button was
stuck on
Hi David,
I have a few of these available near Nashville, TN if you're
interested; see my web page below, prices are very negotiable, and
I'm happy to remove the Zetron controllers if you don't want them. We
could arrange to meet near South Pittsburgh, TN if you like; it's
just off I-24 on the
Thank Goodness you are Back Skip. missed your little Gems over the Holiday
weekend. Hope you enjoyed the hAMFEST, wHEREVER THAT WAS.
Wesley AB8KD
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, September 03, 2008 11:09 AM
Subject:
Hi Wesley,
A few folks get tired of reading my comments and freely Email
me to tell me they don't appreciate my smarty attitude... of
course most of the feedback fails to include their real reply
address along with their note/message. But life goes on...
For those of you close enough to
At 02:23 PM 02/09/2008, you wrote:
Doug,
I have had some similar experiences here in the RB skunk works. I thought I
was the only one to come across this phenomenon. I first noticed it with the
batch of 5 or so that I got around the first of the year. I'm not sure if
they changed to a different
Thanks for that, I tried it but it just stayed at 0.17v
cisfuk wrote:
Thanks for that, I tried it but it just stayed at 0.17v
Not sure what you tried:
1. Making a EPROM with channels from 440 to 480 (or perhaps 400 to 440
if it is a -10) in 2.5 MHz steps.
2. Adjusting the VCO trimmer.
If it is #2, you will need to first move the trimmer and watch
The repeater is a motorola micor station lo-band repeater retuned to
the 6 meter band running 100 watts. The 1.7 mhz is the new aloted band
plan split for 6 meter band in the US. The greater the split the less
isolation needed. From some technical information I found in a
duplexer publication I
That's news to me. I've run a 6-meter repeater for years and had involvement
for years before that. The split in our region is 1 MHz, although you can
get some pairs at 500 kHz if you really want one there.
Chuck
WB2EDV
The repeater is a motorola micor station lo-band repeater retuned to
That is still correct. I just checked. Arrl has made some suggestions.
HOWEVER! THE ARRL IS _NOT_ THE FCC. THE FREQUENCIES THE FCC AUTHORIZES
ARE THE ONLY ONES THAT COUNT!
Chuck Kelsey wrote:
That's news to me. I've run a 6-meter repeater for years and had involvement
for years before that.
Kevin,
Thanks for all of your information. When we get deeper into this
project I am sure I will be talking to you more in-depth about the
dual module PA. Milling the Micor PA deck is not a problem for me as I
do a lot of metal work as well. I can see where the adapter would work
very well for
Where did you hear that?
It's certainly not true.
1.7 MHz is the split in some areas,
but others use 0.5, 1.0, or 1.6 MHz.
Joe M.
The 1.7 mhz is the new aloted band
plan split for 6 meter band in the US.
Those and the local bandplan in your area. There is no national 6M
bandplan in the repeater sub-bands.
In fact, there is no national bandplan in ANY of the repeater sub-bands.
The last one that was national was 440, but that saw its demise with
part of CA changing to 20 kHz channel spacing
Eric,
I just swap the modules from a Mobile into the station PA heatsink if
I have one die. They are the same modules, different heatsink.
I have found that if you back down the last output stage of the
exciter a little, the tripler and first stage of the PA is much
happier and the PA's will last
John, I will take a look.
Thanks a lot,
Joe - WA7JAW
--- In Repeater-Builder@yahoogroups.com, WD7F - John in Tucson
[EMAIL PROTECTED] wrote:
Forgot to addI never persued the SWR power reducing beyond the
simple divider. Our converstion won't drop power all the way to zero
when there's an
Chuck,
Yes, I have looked at the spectrum and I don't see any spurs.
JohnT
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Chuck Kelsey
Sent: Wednesday, September 03, 2008 11:43 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re:
Skipp,
Thanks for the suggestion. I have tentatively concluded that the
desense problem is not classic desense caused by too much RF from the
TX getting into the RX. I have used a spectrum analyzer and a sniffer
probe to locate the RF. But the only RF I can find is at the TX
frequency. I
That is only true if you choose to get a coordination. It is not
mandatory. Only if some kind of interference complaint surfaces does the
fcc place creedance of any kind to the coordination thing. There are
many repeaters on the air in the US that have not had not do they
currently have a
Eric Harrison wrote:
The repeater is a motorola micor station lo-band repeater retuned to
the 6 meter band running 100 watts. The 1.7 mhz is the new aloted band
plan split for 6 meter band in the US.
As others have mentioned, there's nothing that makes a particular
repeater split a U.S. wide
I usually retune the tripler filter on my spectrun analyzer/tracking
generator, and also re-tune the circulator. So the drive level into
the amp is fine, and the circulator is ok. It is definitely PA
issues, such as intermittent substrates, bad chip caps, Z-matches,
etc...
I have done the
well i have 3 GE radios here with 3 Little Sinclair Duplexer inside
them,they were used as a phone patch link,
they are :
CT56AAS66A with their channelle elements at 152.195 mhz RX and 157.495
TX.
the Duplexer are RES-LOK Model SD-220
Serial:Q3242-43
i also have 2 Zetron 36B Phone link base
nice little units.
gervais wrote:
well i have 3 GE radios here with 3 Little Sinclair Duplexer inside
them,they were used as a phone patch link,
they are :
CT56AAS66A with their channelle elements at 152.195 mhz RX and 157.495
TX.
the Duplexer are RES-LOK Model SD-220
Serial:Q3242-43
i
Hi John,
I'm not familiar with that particular radio, but would it be possible to
disconnect the antenna feed at the Rx PCB and place a 50 ohm surface mount
resistor in it's place?
That may allow you to differentiate between shielding problems in the
receive antenna cabling and other possible
Thanks Robert, I am going out into the shack tonight, I think I am
going to trace each wire and see just where they go, this should
hopefully help me find a home for each one. I lloked at TB1 where
some of the wires goes, says they should come from the PA, but then
they don't exactly
yes and H-Duty too.
To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Wed, 3 Sep 2008 20:40:51
-0400Subject: Re: [Repeater-Builder] Ge Mobile MVP
nice little units. gervais wrote:
well i have 3 GE radios here with 3 Little Sinclair Duplexer insidethem,they
were used as a phone patch
Some areas have AM stations on 1000 KHz making the 1 MHz split a non-starter.
The 0.5 MHz split solves that and was popular when mobile transmitters had a
tough time with repeat/direct (remember those radios?). The 1.7 MHz split also
solves this and usually is not a problem for newer radios
Note that the Extender is Moto's name for a Noise
Blanker, which is the term that GE used.
The noise blanker (no matter who makes it) is an AM receiver
(whose front end is parked on a (hopefully) quiet channel) whose
IF is the same frequency as the main (FM) receiver IF.
The AM IF's is inverted
At 05:43 PM 09/03/08, you wrote:
Now just a more curious point, something I guess I just don't grasp,
but all the wires going up to the PA are 18 guage or less wires, it
would seem to me that with such high power output that it would have
at least a few larger wires at least of the 12 guage or
Not true. The FCC has upheld local bandplans. Coordinated or not - they
apply to everyone. It doesn't even have to be a repeater issue.
True, as long as no interference is created, they likely won't get
involved, but if there is, and one user is operating according to the
bandplan and the
Most antenna specs in the band are for 800 kHz max. That's why our area
has 500 kHz splits - for duplexed repeaters. We also have 1.0 MHz
splits. As any 1.7 MHz bandplan would destroy the 500 kHz split band, I
don't foresee that happening here anytime soon. There is also the fact
that everyone
Local Band plans are fine except when skip opens up on 6 meters and
nobody can win or utilize an interference fight. Look to see how many
domestic users are left in low band vhf in relation to say 30 years ago.
Unless the sunspot cycles have stopped (which according to the ARRL
they may have ;-)
L1 shows 0.17v upto 460mhz then it shows
460mhz = 2.5v, 465mhz = 9v, 470 = 14.8v, 475 = 3.8v, 480 = 9v
Well regardless if wether 1.7mhz split in the 6 meter band is or is not
a national US band plan split it is an excepted split by the Kansas
State Repeater Cordinator as my repeater is cordinated on 52.850/51.150
by them and has been for over 2 years. Just getting it back on the air
at a new
On Sep 3, 2008, at 8:18 PM, Eric Harrison wrote:
Well regardless if wether 1.7mhz split in the 6 meter band is or is
not
a national US band plan split it is an excepted split by the Kansas
State Repeater Cordinator as my repeater is cordinated on
52.850/51.150
by them and has been for
hi i am looking for ge uhf solid state high power 88 splyt 200watts
[EMAIL PROTECTED]
hi looking to buy a set of tx rx for uhf 440 that are ham band ready
350 watt 606-215-0441
Eric,
Your question cannot be answered properly unless you provide the power
output of your transmitter and the 12 dB SINAD sensitivity of your receiver.
Therefore, I will offer some calculations based on some assumed values:
25 watt transmitter, 0.35 uV receiver, 1.7 MHz split: 237 feet
On Sep 3, 2008, at 8:43 PM, kb4ptj wrote:
hi i am looking for ge uhf solid state high power 88 splyt 200watts
There is no GE MASTR II (88-split indicates that you're looking
specifically for a GE product) that does 200W at UHF. The MASTR II
Station/Repeater PA (solid-state as you
At 9/3/2008 16:07, you wrote:
Where did you hear that?
It's certainly not true.
1.7 MHz is the split in some areas,
but others use 0.5, 1.0, or 1.6 MHz.
Joe M.
The 1.7 mhz is the new aloted band
plan split for 6 meter band in the US.
SoCal uses 500 kHz.
Bob NO6B
At 9/3/2008 16:11, you wrote:
Those and the local bandplan in your area. There is no national 6M
bandplan in the repeater sub-bands.
In fact, there is no national bandplan in ANY of the repeater sub-bands.
The last one that was national was 440, but that saw its demise with
part of CA changing to
At 9/3/2008 08:09, you wrote:
Desense (actual Cable-Q contributions)
Hi John,
There is a case where you can actually be fighting a complex
problem with unwanted contributions actually made/introduced
by the cable (feed-line) Q. To be more specific some combination
of the antenna, duplexer,
Ok Great this helps. Any idea the db of isolation say for 50 watts
and .35uv 12db sinad @ 1.7 mhz split?
Eric
N7JYS
-- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED]
wrote:
Eric,
Your question cannot be answered properly unless you provide the
power
output of your
cisfuk wrote:
L1 shows 0.17v upto 460mhz then it shows
460mhz = 2.5v, 465mhz = 9v, 470 = 14.8v, 475 = 3.8v, 480 = 9v
Discounting the 475 and 480 MHz readings, it is likely currently
centered / tuned for about 466 MHz.
It cannot require the same VCO voltage at two largely disparate
Doug, Did you sell the RLS boards? I'm interested.. - Mike
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Doug Fitts
Sent: Sunday, August 31, 2008 10:02 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] For Sale: CAT Controller
I have for
You might try contacting Larry K7LJ. He posts on here occasionally and
I know he had a couple of these the last time I talked to him, but
that was a couple months ago.
They are more like 350 Watts.
Joe
--- In Repeater-Builder@yahoogroups.com, kb4ptj [EMAIL PROTECTED] wrote:
hi i am looking
oops, UHF are 225-250 Watts, it is the VHF that are 350 Watts.
Joe
--- In Repeater-Builder@yahoogroups.com, Joe Burkleo
[EMAIL PROTECTED] wrote:
You might try contacting Larry K7LJ. He posts on here occasionally and
I know he had a couple of these the last time I talked to him, but
that was
Also as Nate said, GE did not make a high power solid state amp. The
Mastr II high power stations that I referred to use a normal Mastr II
solid state PA to drive a tube amplifier to acheive the 225-250 Watts
on UHF or 375 Watts on VHF.
If you are not familiar with high power tube transmitters
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