On Sun, 23 May 2010, Tim - WD6AWP wrote:
I have a small amount white noise on the TX of a Micor repeater. It is
most noticeable in the hang time but it's not coming from the
controller. It's still there with the controller completely removed
and pressing PTT on the station control card.
Pacific have been out of Kenwood for ages,
Best bet is to contact Kenwood directly, or try RF Parts.com in the states.
Before you do that, check if the power module has in fact Spat the dummy as
many of the TKR-720 and 820's suffered from dry joints in the PA stage. So
firstly I would suck up,
Hi Tim,
Might the RX be hearing the TX?
Doug - GM7SVK
On 23/05/2010 04:10:37, Tim - WD6AWP (tisaw...@gmail.com) wrote:
I have a small amount white noise on the TX of a Micor repeater. It is
most noticeable in the hang time but
it's not coming from the controller. It's still there with the
I think this is what you are looking for -
http://www.trademe.co.nz/Electronics-photography/Radio-equipment/Amateur-radio/auction-292086327.htm
If this will do the job let me know and we can arrange to buy and send it to
you. I have a paypal account for payment.
I am away from home till
I had this on a Mastr II and solved it by adding a resistor across the audio
input to the exciter - I think I used a 100K, but you could experiment. It
originally sounded like squelch noise leakage, but it wasn't.
Chuck
WB2EDV
- Original Message -
From: Tim - WD6AWP
At 5/22/2010 21:10, you wrote:
I have a small amount white noise on the TX of a Micor repeater. It is
most noticeable in the hang time but it's not coming from the controller.
It's still there with the controller completely removed and pressing PTT
on the station control card. It's more
http://www.rfparts.com/module_m.html#m57704el
Otherwise I might have on in stock somewhere... but right
now it wouldn't be an easy find for me.
cheers,
skipp
skipp025 at yahoo.com
Authorized Kenwood Service Station (and Sales).
www.radiowrench.com
--- In
Yes, it has a stock Motorola PL encode board. I think the noise was there
before I installed it.
--
:wq
Tim
That seems unlikely I don't hear it in the local speaker. There is no
detectable desense or other noise on the RX signal.
--- In Repeater-Builder@yahoogroups.com, Doug Hutchison specialq@...
wrote:
Might the RX be hearing the TX?
Just curious. Have you put a scope on the power supply to check the AC
component during transmit. A degraded filter cap or even a transistor with a
small amount of leakage will generate what seems to be a touch of white noise
under considerable load. Might seem too simple, but it happens alot.
Has the noise been there all along?
It may be just the nature of the beast.
There is an article on the RB web site about modifying a mobile audio
squelch board to work in a base/repeater station, one of the benifits to
doing so is the better muting of audio from the receiver, this is
because
Came across this site.
http://www.look4ic.com http://www.look4ic.com
CJD
--- In Repeater-Builder@yahoogroups.com, skipp025 skipp...@...
wrote:
http://www.rfparts.com/module_m.html#m57704el
Otherwise I might have on in stock somewhere... but right
now it wouldn't be an easy find for me.
Tom,
I believe he said that with the controller disconnected, and using local
PTT, it still does it. That should take the receiver completely out of the
equation, leaving only the exciter as the likely culprit.
I'd suggested adding a resistor from ground to audio high on the exciter to
see if
Has it been established whether the Micor station was originally built as a
repeater, or is it a base station that has been converted into a repeater?
A repeater station comes with a great deal of filter components added to the
two interconnect boards, as well as extra shielding over the unified
Hello Byron,
The M57729 is a standard Motorola PA Slab.
Yours is the Kenwood Part number, M57729h-01-P.
The standard Motorola module will be available off the shelf,,, BUT,,, it will
be priced @ $230.oo US.
Any equivalent Motorola, or spurious part [30W UHF] will do the job, much
Chuck, I did over look that part about being disconnected.
Is it present when you have a full quieting signal on the rx input?
He may still have an audio path feeding the tx. How about pulling the
audio squelch board and trying the local ptt?
tom
On 5/23/2010 12:54 PM, Chuck Kelsey wrote:
RF Parts in California lists the M57729 for $ 68 (US)
http://www.rfparts.com/module_m.html#m57704el
Dave WB2FTX
- Original Message -
From: P Grant
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 23, 2010 9:37 AM
Subject: Re: [Repeater-Builder] Need source for UHF
He indicated that in repeat it was better (less white noise) with an
incoming signal, then got worse on the tail. Then he disconnected the
controller and still had white noise with local PTT. To me that hints of the
exciter not liking a high impedance input, or no load on the mic input.
Be careful about getting the proper replacement part. The basic M57729,
without a suffix letter, is for 430-450 MHz. The M57729L is for 400-420
MHz, and the M57729H is for 450-470 MHz. There are other versions, with
different suffixes, for other UHF bands.
73, Eric Lemmon WB6FLY
Would the same apply to an MSF2000 base station converted to a repeater?
lh
On Sun, May 23, 2010 at 1:10 PM, Eric Lemmon wb6...@verizon.net wrote:
Has it been established whether the Micor station was originally built as a
repeater, or is it a base station that has been converted into a
Larry,
I know about MSR2000 and MSF5000 stations, but I've never heard of an
MSF2000. Most stations that are built for simplex (base) operation lack the
filtering that is standard in duplex (repeater) operation.
73, Eric Lemmon WB6FLY
-Original Message-
From:
Hi all
I have a Racom 1300 morse code station Identifier. I am looking to see if
there is a way to reprogram the Prom in the unit. The company is no longer
active. The prom contains the call sign information. I know I could throw it in
the trash and buy something new but I hate doing that
Hello all. I have a GR1225 that seems to work just fine except for one lil
problem.. It will quite often stay keyed up after the signal or local mic is
released. The only way to clear it is to shut it down and turn it back on..
Then it's good for like 10 sec's and does it again. It won't do it
A resistor certainly would be easy enough to try. As would popping in a
spare exciter if he has one.
tom
On 5/23/2010 3:01 PM, Chuck Kelsey wrote:
He indicated that in repeat it was better (less white noise) with an
incoming signal, then got worse on the tail. Then he disconnected the
Many early models of the GR1225 desktop repeater were delivered with RG-58
cable in the internal duplexer harnesses, which led to desensing and lockup.
The problem becomes worse if carrier squelch is used. I was able to cure
that problem by fabricating new harnesses with RG400 double-shielded
Any of you guys had any experiences in using a GE
Master Executive 11 as a repeater, and would you
recommend it.
Leroy J39AI
GE MasterThe Exec II has been used for lots of repeaters. Work well.
Chuck
WB2EDV
- Original Message -
From: Leroy A. M. Baptiste
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 23, 2010 6:17 PM
Subject: [Repeater-Builder] GE Master
Any of you guys had any
Eric,
I'm usually dyslexic on Yundas! It's a MSR2000. About 12 years ago I
converted a
base station variant to a repeater. As I recall I had some difficulty
configuring it; i.e.
there were some jumpers to add and remove, but thus puppy has been trucking
along
at a very busy site and nary a
Would it make a difference if I lower the high power setting from 45 watts down
to 15 watts to drive a external TPL amplifier or the low power setting from 20
to 15?
Got it working! I had already swapped all the cards with my working
spare repeater and there was no change. Went back up on the hill and
pretty much pulled the cards, looked at the back plane, put the cards
back in and fired it up...came right on! Strange. I've had a problem
with this
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