Just finished a 3 remote site DHE system - very easy to setup - GE Phoenix's
for receivers and 438 link radios. M3 repeater.
ssb
- Original Message -
From: Michael Singewald N1PLH [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, November 01, 2003 7:04 PM
Subject:
I have taken some 10 Sinclair VHF cavities and copied
the harnass from from a 6 store bought duplexer, except
instead of a tunable capacitor made from polystyrene and
tubing, I used a length of coax for the notch tuning, snip, snip
watch for the dip on the spectrum display unit.
The harnass
Seemed to me like the coupling loops entered in, ie., the inter stage
lengths were shorter by the coupling loop electrical length than the length
between the antenna junction and the first cavity.
ssb
I usually cut and try - add an elbow and see if loss goes up, if not shorten
the cable a bit...
on programming commands with an D like D14 to enable programming the cwid,
do not enter the D.
Also commands with #, like #9 to force ID, enter 09 and do not enter #.
Had the same challange last Thursday. Once programmed really works
well.
ssb
- Original Message -
From: va3vkk [EMAIL
I can scan and send jpgs if you like.
ssb
- Original Message -
From: uplink28 [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, November 25, 2003 2:45 AM
Subject: [Repeater-Builder] Ritron RR-450
| I'm looking for manuals for this unit. Anyone who wants to sell me
Gee, they could have had a Genave...
Back in the late 70's both Gatesville, N5DDR/R, and Lampasas, W5GFR/R
bought Spectrum 2M repeaters. Gatesville had a phone patch, and
Lampasas was stand alone. Both used single antenna, and WP641
duplexers. Lampasas is dead. Gatesville is still running
I have used VHF cavities in 3/4 mode many times for UHF combining - Cabling
would not be the same, but the 10 Sinclairs I use for a 5 channel UHF
combiner work well.
Ssb
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
I have been playing with GE Phoenix SX UHF and VHF for temporary and
link repeaters - very inexpensive, programmable and wideband -
reasonable performance and if you derate the transmitter will last a
long time, and as inexpensive as they are just replace instead of
repair.
Use a pair of
Pretty sure Phelps Dodge Copper Company evolved and spun off CableWave
Systems, then CelWave RFS.
Ssb
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I am not using tone supervision - have 3 remote receivers (GE Phoenix) on
146.22 and 438 Mhz links back to the repeater. Use CTCSS on both the 146.22
rx and the links. The links come up on RUS, and the Voter looks for a COR
line. The delay IS noticeable, but not a serious impediment. The first
I remember an old QST article about the 3.58 Mhz color burst sig on network
tv being tracable to NBS. If I remember correctly the sets are phase locked
to the incoming sig?
Never was much at TV..
Ssb
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http://www.endruntechnologies.com/frequency-control.htm
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attachment: winmail.dat
Before you fix a receive problem be sure there is a problem. I have used
ARR GasFet preamps for some time with excellent results. Be sure you have
a filter or cavity ahead of the preamp, and that you do not have so much
out of band energy getting to the preamp that it goes into overload and
Howdy Dino regarding the preamp and
filter.
First thing that sticks out is sweeping
the line. This is a good figure of merit for an antenna system and
cable. The process involves running a sweep across the band and a
graphical representation of VSWR across the band. The unit of
Looks like full circle here. Best memory serves me, Gates Radio was the
father of Quintron in Quincy, Ill, sold off to Glenayre, and now back to
ISC in Quincy.
Ssb
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You let the bp/br duplexer take care of the in band problems and then use a
band pass cavity that does not have to have very much loss to take care of
the out of band problems if needed.
de KU4PT
Or even better, run split antennas with a Tower Top Amp if you are on a 300
ft or better tower.
What is power and frequency?
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
He won't receive email, but the rest of us will.
Best to shut his account off until he remedies the
Trouble.
Thanks,
Steve
Nu5d
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Swap places between TX and RX radios and cut the power back to 50% or less
and add a fan. Can't say how many of those little intermittent duty radios
I have seen with burnt up PA's.
Regards,
Steve
NU5D
Yahoo! Groups Links
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Master Pro Stations had a thermal switch on the PS PCB that when it got to
140 deg F would cause the fan to stay on. Else the fan operated during PTT
only.
Merry Christmas,
Steve
Who knows himself a braggart,
Let him fear this; for it will come to pass
That every braggart shall be found an
Hello Larry,
You should have no difficulty tuning the pass, just observe HIGH and LOW
freq inputs. If the series band reject capacitors do not have the range
you need,
1 - If inserting the polystyrene rod does not quite reach your notch point,
and the rod bottoms out, then get a long drill bit
I suspect the 50 Ohm load is pretty much purely resistive. The antenna may
have reactive components that even with a very low standing wave ratio, may
cause the shutback circuit to do so. Sometimes a different length of
jumper cable may change the reactance vector. Wonder what the Antenna and
Hi Glen, any luck on the Model 35?
Steve
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Was the station delivering rated output etc., before you started
re-channeling?
Ssb
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Did you test it before you recrystalled it?
Ssb
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Well lets see, If you had a good working repeater, pulled the xtals, and 4
years later, put like xtals back in and did nothing else, then aside from
VERY minor touch up, it should come back flying.
If not, I would check all the voltages, and a little off on the -20 won't
hurt anything - just be
Best I remember on the Pro I had to build a single NPN SI inverter on the
COS line to take the 0.7 RUS signal and convert is to a 10 to 0.2V signal
using the last lug on the right hand terminal block on the right hand side.
Remember it was very close to the 120 VAC power connection. Been years
I suspect there was about 600 VAC 60 Hz., and a healthy dose of RF on top
of the 60 Hz.
Ssb
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I suspect when you add the coupling loop length that the interstage cables
will be on the order of 3/4 wave length, or around 10 or so.
I ran into the 3/4 wavelength business taking some 10 Sinclair VHF
cavities, and building a 5 channel UHF combiner with cavities and dual
junction isolators.
Years ago I ordered a replacement for a DB304 from Decibel in Dallas -
don't forget the fiber tape and the aluminum tape.
Steve
NU5D
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www.andrew.com Andrew Microwave aquired DB Products and has a support site
on their web page.
Ssb
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The 6DW4 Nuvistor was a vacuum tube in a metal case, filament, etc. RF amp
used in TV tuner and Sonar FS23 CB Base radio. Seems like the solid state
jobs replaced 12AT7, 6U8, etc.
But I may be wrong,
Steve
NU5D
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The ID8 has it's own courtesy tone that can be turned on in programming -
not familiar with how to on the repeater itself. Ssb
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I don't think a voter is the right answer in this instance, because the
effects, ie, picket fence, and flutter happen faster than a voter can
respond. Also, you would have to have a second receiver, with the same
audio characteristics as the first, etc.
Perhaps the better answer would be to
http://www.sigmawireless.ie/documents/Understnd%20Spc%20Dvrsty%20Rev2.pdf
In their paper Sigma Wireless discusses
space diversity at 405 Mhz and three
different combining techniques, Selective
(voting) Equal Gain Additive, and
weighted ratio combining, and the merits
of each.
In
http://www.lectrosonics.com/wg/wgdiv.pdf
A simple diversity paper on Wireless
Microphone receivers..
Ssb
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Seems like Kenwood has a KCT-19 cable that plugs into the radio and brings
a 15 pin molex connector out of the radio. This has all the PTT, COR, Mic
IN, etc needed to interface. Also seems line JB Enterprises has a $70
controller with CWID (whole controller abt the cost of an ID8) that
programs
The controller was NOT JB Enterprises. It was BD Enterprises - Perhaps a
Freudian slip concerning a bottle of Scotch Whiskey.
The url is:
http://www.bdenterprises.com/products/
[Steve S. Bosshard (NU5D)]
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Our county health department got $5000 homeland security for a 2M repeater
for a couple of hams in the area.
Ssb
NU5D
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Very common in bambulances and fire trucks - they use a relay that looks
like a starter solenoid but unlike the solenoid is designed for continuous
duty cycle - most auto supply and emergency equipment suppliers have same.
Be careful - once got one used with a golf cart - 24 to 36 volt coil would
BD Enterprises has a repeater controller with Morse ID for about the cost
of an ID8.
Ssb
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I used to take some waxed wiring lace and thread it inside the coil form
for the core to work against.
Kept the wiring lace right next to the replacement dial string.
Steve
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Same deal with large LMR factory depot - flat rate for one problem - more
problems MORE $$$s.
Steve
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Oh Really? If you ASSUME (and you know how I mean that word) that each TX
HAS to have 20 kHz of bandwidth, I guess so, but that's not necessary. Only
if you have 5 kHz deviation and a 5 kHz of frequency response (or some
equivalent combination) will that be true. Most radios, including ham
CARSON'S RULE
BANDWIDTH = 2 X (PEAK DEVIATION + HIGHEST MODULATING FREQUENCY)
Most 2M off the shelf radios I have seen lately in wide band FM hit at
least +/- 5kc peak deviation, and 6 to 6 ½ is not at all uncommon.
Measurements using HP8921 or IFR COM120B.
I have not run a swept transmit audio
Seemed like Pioneer also made a coronary observation radio using GE MPE
parts and pieces.
Ssb
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I have used fiberglass resin with hardener purchased at an automotive paint
store. After rough sanding the antenna I applied 2 coats of finish - it
was really rapid drying. Have had several rehabbed antennas in service for
4 or 5 years now.
Steve
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I would look toward TXRX, or EMR Corp, or Telewave or a Cross Band Coupler.
I have used Telewave brand for years on my 450/800 single feed line
systems. They tout 0.37 db insertion loss for a pair. I also have a set
of Wacom's Cross Band at a different site.
They are much more expensive than
I am thinking the duplexers will be on the ground, and you simply want to
run both a VHF and UHF repeater using the same feedline and different
antennas at the top. If so, a cross band coupler is the device, one at the
top and one at the bottom. They are very broad band devices and should
I wouldn't want to mess with someone who goes around bending 2 water pipe
all day long. Best answer would be to ask a mechanical engineer who is
also a ham. Round these parts the mast of choice is oil well drilling rod
or also called sucker rod. I have never used it but hear others who have.
It would be nice to run an intermod program to see if any combination of
800 channels produced a 'hit' near the 2M input.
Ssb
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Once had to add an elbow to add abt 1
length to one of the cables to move the reject might give this a try.
Ssb
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Once upon a time, ferritronics made a dpl board for some of the regency
stuff - almost 20 years ago - seems like the board cost around $200 or so.
Probably better to get a newer radio.
Ssb
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Lloyd built a 2M RPTR / Packet Combiner using a 641 plus 2 additional 8
cavities.
I have one similar in Rockdale, TX with a Fire Repeater, plus a 155.280 EMS
simplex channel. Maybe TX/RX or John Elliot in Waco may have the plans.
SSB
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I fought a duplexer tuning problem for several hours, then noticed the
repeater transmitter was spurious. Mission Impossible.
Ssb
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The CE3 would not cover 440-450, the CE2A would.
Don't know of any mod. Used a CE3 from 75 thru 81 with only a scope xformer
fail, and several replaceable pads in the generator line lost their smoke
and fuse.
Ssb
-Original Message-
From: Coy Hilton [mailto:[EMAIL PROTECTED]
Sent:
The module is a tunable preselector vs a broadband front end.
Ssb
-Original Message-
From: Mathew Quaife [mailto:[EMAIL PROTECTED]
Sent: Sunday, June 06, 2004 9:02 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Cushman CE3
Depends on the module that you have
You can match 4, 50 Ohm elements using 50 Ohm Cable. Parallel 2 elements
with any length of 50 Ohm cable for 25 Ohms. Parallel the other two
elements with the SAME any length for a second 25 Ohms. Use a 1/4 wave
length of 50 Ohm cable to transform the first 25 Ohm pair to 100 Ohms. Use
a
Ditto DB Enterprises de NU5D
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Hello,
I am probably a little loose with the
word compressor. The object of this ALC board is to maintain a -10 dbm output
even though the input may dip to -20 or hit 0 dbm. The integration time is 10
ms., and the max gain is slightly more than 10 db. This is a far cry from the
I have seen 7/8 air punctured by wind causing the cable (jacketed) to
vibrate against slag from a weld in the galvanizing of the tower. Most
times I use #14 insulated solid copper tie wires (butterflies and beam
clamps are much nicer) in such a manner that the cable cannot rub or be
damaged by a
There has been considerable discussion on the pros and cons of each
protocol and lots of good information has come out. Seems like the
which is better discussion comes down to performance (-122 dBm into
the antenna port for a 10 (-3) Bit error rate) or some qualifier of that
nature. Occupied
Use the best shielding possible between the RF equipment and the
duplexer and from the duplexer to the antenna low loss is more important
that sheilding.
Steve
Howard Z. wrote:
I have read that one should use dual-shielded cables.
Which cables are these?
Is Belden 9913F7 a good choice?
Easy - use a straight db9 cable to program - requires software and you
will have to re-tune the front end. An extender card would be really nice.
FIRST - be sure the radio is working on 151.505 properly. After
reprogramming you will need to remove the antenna relay and you will
really enjoy
Unless something has dramatically changed recently, the only difference
between a conventional base station and a repeater is the antenna relay,
and programming. Steve NU5D
Eric Lemmon wrote:
Steven,
The SXHM01 identifies a base station (not a repeater) for 150.8-174 MHz, 110
watts, capable
I would like to be able to place equipment on a former ATT site if the
new owner is agreeable and I do not become liable for lighting and
painting, etc. AND if the site would serve an area that I would like to
serve, and the condition of the tower were safe for use. Also things
like tower
Exec 1 series - don't think I have a book, but might have microfische.
Steve.
Rpage wrote:
Can anyone identify the receiver in the photo section , UHF GE Repeater ?
http://ph.groups.yahoo.com/group/Repeater-Builder/photos
There is no identification info stamped on or inside the receiver.
The
Generally 199 ft unless you are close to an airport. There is a 110 ft
tower that requires registration but no painting or lighting because it
is close to the Temple, Texas airport.
Steve NU5D
texasexpediter wrote:
What is the maximum height a tower can be without falling under all
the
Don't know if this counts or not.
http://findarticles.com/p/articles/mi_m3457/is_n21_v10/ai_12712168
Personally, I do not know.
Steve NU5D
[EMAIL PROTECTED] wrote:
In a message dated 6/17/2007 12:29:46 A.M. Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Tell that to the hams who have
Doug, later VCO's have dip switch range programming on VHF, and I have
changed a couple of caps on UHF to get them to downband. Have had M3 on
both 2M (present W5LM 2M repeater) and 440 without a hitch - again, base
station to repeater is just re-programming issue, and TOT, DTMF control
and
Sounds like you have a M2E that was only made for a few years between
the M2 and M3 generations. You cannot set frequency, but tone, etc is
programmed into the sys mod. Use a straight db9 cable and read what is
in the module using your software and computer. 73, Steve NU5D
Don Wankel wrote:
Amateur radio can be a valuable backup for Fire, EMS, and Police
communications systems. There are occasional Simulated Emergency Tests
preformed to uncover deficiencies in primary systems and once uncovered,
these need to be addressed. Our Cities and County bought a radio
communications system
Marty, did u ever get ur MVS programmed? I have the stuff - just
haven't used it in years. If I can find a working MVS, I could put your
eeprom in my radio and program the chip without having to ship the radio.
Steve NU5D
k8hvi wrote:
I would like to get this programmed. I see where you can
Mike this very same thing happened on a 47Mhz simplex base station -
poor range, high vswr. Fold over monopole. Dummy load, still bad,
replaced RG8 between the building and the antenna, still bad. Pulled a
little cable from the building and there is was - RG8 blown up due to
lightning.
I ran into something similar on an R100. I tried to use 5 khz steps in
binary coding, and found that the synthesizer only responded to every
third step. Maybe this is happening. I programmed 146.22 in the rec
and 146.82 in the tx and they locked right up. Like you say, moving
5khz and ool
There are two pots in the TX SYN, but that would be a last ditch thing.
Usually you can make everything work OK in software. The pots inside
the module are for LF mod (CG tone, DCG, etc) and HF mod - higher end
audio frequencies. The DSP in the system module also can very much
affect
I may have a few parts laying around for a station. Lemme know if you
need anything - The back plane ($1800) is a killer. I probably have a
working interface board. Steve NU5D
Doug Bade wrote:
It is inter spacing white noise over the modulation like a second
receiver open squelch being
Did u get the 720 programmed? Steve [EMAIL PROTECTED]
cobalto27mx wrote:
Hi Group! Can anyone tell me how to program a Kenwood TK-720 mobile,I
have the kpt-20, i need a copy for manual, or procedure for
progam the eprom 27c64. and diagram fpr other cables .thanks. jesus
Roger, Roger, Roger.Steve NU5D
mch wrote:
*The length from the repeater to the duplexer is not critical (or SHOULD
not be when properly tuned). Therefore, there is no 'formula' other than
you want it as short as possible yet allowing enough flex/extra that it
won't get stressed.*
Agreed the duplexer most likely will not be pure anything. Seems like
Wacom tuned the pass/reject with a sweeper, then looked at return loss.
Odd quarter wavelengths of cable would transfer the Z at the duplexer to
the antenna, transmitter or receiver, but most PA's are broad banded and
http://www.eagle-1st.com/notes/duplex/body.htm
I saw that line stretcher guy, Ian. He was next to the striped tower
paint salesman. 73, Steve NU5D
PS - I have used an isolator in place of the TEE on the output of a
duplexer. Not very practical there, though, and it sure knocks down the
receive if you put it in series with the antenna, else
Ian, I owe you an apology for my comment about striped tower paint in
response to your 'Line Stretcher' post. I never thought of using such a
tool on a short line between a transmitter and duplexer. I was thinking
such was used in AM broadcast delay lines with phased towers, and never
though of
http://www.antennex.com/preview/vswr.htm
--
Ham Radio Spoken Here !!!
EM11ma - South Mountain, Texas
begin:vcard
fn:Steve Bosshard
n:Bosshard;Steve
adr:;;503 B. South 25th. Street;Temple;Texas;76504;USA
email;internet:[EMAIL PROTECTED]
tel;work:254-773-1102
tel;fax:254-773-1174
ever want to do that? Unless you like destroying isolators.
:)
73
Gary K4FMX
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
[EMAIL PROTECTED] On Behalf Of Steve S. Bosshard (NU5D)
Sent: Sunday, July 01, 2007 8:52 PM
To: Repeater-Builder
I remember asking Lloyd at Wacom about using an isolator in the output -
seems like he told me that it allowed more flexibility in cable lengths
on the output - might make sense because the Q package had frequencies
from 458 to 468 with the apcor carry in units. Ancient history -
nightmares when
The DCS turn off code is 132 hz. So, 131.8 hz ctcss and dcs could be a
problem. Otherwise we ran dcs with paging tones because tone coded
squelch and paging tones do have issues. I would think the two would be
OK, but where are you going to find a radio to encode tone and dcs at
the same
, the TOC could false a 131.8 Hz decoder, but not while the
person is transmitting.
Joe M.
Steve S. Bosshard (NU5D) wrote:
The DCS turn off code is 132 hz. So, 131.8 hz ctcss and dcs could be a
problem.
I just left a 911 Med Dispatch Center - I am pretty sure a kerchunk
every time another user keyed their radio and the TOC falsed their 131.8
PL would be a major issue. But, if you want to run 131.8 PL on the same
channel with DPL and a turn off code kerchunking the radio every time
they let
Howdy Lou,
FB on wanting to put up a repeater. First step would be to see what
demand/need for a repeater might be? Is there already a repeater
serving the area and folks want to split off, or is this an unserved
area, and folks who cannot operate simplex needing a repeater?
For me that
The General Electric MCD (Mobile Communications Division) was big on
TLAs (Three letter Acronyms). I always hoped there would be an LBI
(Lynchburg Book of Instruction) outlining TLAs. We have GETC's, MOM
PC,s IEA computers, CSD computers, The MOM looks at CIC's the TRIM,
VMIMs, and AIC's as well
Thanks Ron - 73, Steve NU5D
Ron Wright wrote:
Steve,
The link to the D-Star you gave is an e-mail address.
Is the new group a yahoo group in the form of:
http://groups.yahoo.com/group/dstar_digital
This is the normal format for a yahoo group page.
73, ron, n9ee/r
--
Ham Radio
I was thinking most every radio used a crystal (TCXO) as the reference
from which everything else frequency wise is derived. One really stable
oscillator vs many oscillators. Steve NU5D
MCH wrote:
Regardless of how many modern radios use temperature stabilization, that
does nothing to
Sounds like you have the makings of a db 228 if you add the proper
harness. Else maybe run the repeater on one antenna, and used the
second antenna with proper cavity filtering as a diversity (term loosely
used) receive antenna. Steve NU5D
s3hampton wrote:
I presently have a DB-224E as my
Just remembered another plus for rock bound equipment - used to be lower
power consumption (before mosfet technology) because it took less power
to run a xtal osc than to run a synthesizer plus a crystal reference
oscillator. Don't know if power consumption is true today, though.
Steve NU5D
Wacom built their duplexers from aluminum irrigation pipe, seems like
they used several heavy metals in the electroplating process (outside
company). I remember when the EPA shut down the electroplating company
- dumping chemicals into the Brazos River - Wacom had to send their
goods to Fort
Be sure the control line is terminated. I have seen m3's get repeat
disable from voice on the control line (even if remote control is not
used). Vexing problem. Steve NU5D - BTW that tip came from Pete
Lascelle at GE, or EGE, or Comnet, or MA/COM now days...
Vincent Caruso wrote:
Is it out of
Bought new around 1991 - lost one driver module in the PA - use internal
CWID/hang time, timeout timer, etc - Have outboard dtmf decoder tied to
a 440 receiver to turn off the repeater, otherwise everything stock from
GE - we do have a doug hall voter wired in using the local receiver plus
3
Lots of times those BpBr cans will pass stuff not too far from the
desired pass freq - A 2 loop BP cavity could very well help with
receiver overload from a 155 Mhz signal - a simple test would be to hook
a receiver to the REC port of the duplexer and see how strong the 155
Mhz signal is.
As
Whilst I have my GE books out, was anyone needing any info on the M3 or
M2e - lemme know - Steve NU5D
Jim wrote:
Jamey Wright wrote:
Based on the year you specified, it was probably Mastr II or Mastr IIE
although it could be Mastr III. I'm not sure when the Mastr III were
introduced.
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