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From: " " <dx_ing@...>

Hello,

I have a GE Master II UHF mobile radio, and I am planning to convert this to
a UHF repeater. The combo number is YS55SSXX88a. Could this unit be tuned
down to 440 ham band since the combo number is kind of different from what I
have seen on INTERNET listing. Any info is much appreciated in advance.

Thanks

From: "T.E. Butler" <tebutler@...>

Hi Fellow Hams,
I just acquired a Master II Repeater and interfacing a Cat 300 DX
controller to it. I have everything done except I wish to use the
RUS line for COR input. The RUS line goes high for a split second till
the exciter keys and then goes low. There must be another place to pick
up RUS that will stay high as long as the receiver is unsqelched. I am
hoping that someone knows of this location. Using the RUS as COR is in
light of having mobil flutter problems on a previous converted Master II
mobile.
Another thing that I need is where to pick up a CTCSS output from the
factory G.E. pl board. I need to go high on a line when P.L. is
present. I didn't find anywhere on the backplane that gave me this.
Any help would be apperciated very much. Thanks, Tom Butler, N5KWN..

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-----Original Message-----
From: HQ54@... [mailto:HQ54@...]
Sent: Thursday, April 29, 1999 5:55 AM
To: Repeater-builder@...
Subject: [Repeater-builder] NEED HELP WITH REPEATER


From: HQ54@...



Hi All,

I was wondering if any one could help me with a problem I am
haing with
my repeater. I am currently using a Motorola Suitcase Repeater,
basically
based on the MX series of portables, this unit is fully self
contained with
high power PA, mobile type duplexer, repeater controler, and even a power
supply (OF which I am not currently using, I am using an Astron
35amp unit)
I am also using about 50 feet of LOW loss 75 ohm coax that I got from the
Cable Company, however, I am unsure of the exact type of cable,
RG6 or RG11
or whatever. I am also usiung a Ringo Ranger antenna, mounted on
the top of
my building 6 stories up. I know it isn't the most ideal setup, but I am
just looking for some local coverage, a couple of miles worth,
maybe 3 or 4
on 5 watt portables. Now to the problem,

The unit works flawlessly when within about 7 to 10 blocks away,
however, once passed that point, or even closer when in a house,
building, or
basement, the reciever opens, and stays open the entire time of
the signal,
however there is a low pitched, I guess it would be called a "HUM", that
completely covers the audio of the signal. I thought that maybe
it was the
duplexer, but I tested that by disabling the transmitter while
recieving a
"HUMING" signal, with no improvement. I then thought it was the
antenna and
the connections, but I have an SWR of about 1.4, so I wasn't that
concerned
with the antenna. However, I once read somewhere that the way the Ringos
carry the RF, it wasn't good for the duplexer, so I swapped it
out with an
Antenna I picked up at a hamfest, and according the literature with the
antenna, it has been successfully used with other repeaters, along with
replacing the connectors at both ends of the coax. This new antenna did
improve on the humming problem, signals that before would "HUM" didn't,
however, the antenna was physically smaller, so I lost alot of the output
gain, and the reciever wouldn't pick up signals that before it
would, without
dropping out, but were humming. So, I switched back to the Ringo
thinking
that maybe the connectors were the problem, however, they weren't
as I am now
getting the HUM again.

I was wondering if anyone had any ideas or suggestions that
might help.
I was thinking about adding a MICOR recieve preamp, thinking that
maybe the
signals just aren't strong enough, and that is why I am getting
them HUM, but
I think that there is something else going on.

Also, can anyone tell me, can I install the MICOR preamp in
the coax that
leads from the duplexer to the reciever, or does it have to be after some
sort of reciever circuitry.

Thanx in advance for any help you may be able to provide.
Mike

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From: Matthew Janusauskas <w21@...>

Hi group,

We are trying to make an older model RC-1000 controller by MicroComputer
Concepte work with a VHF Micor. The audio sounds very harsh and tinny.
Anyone have any experience or advice to make the repeat audio sound better?

Thanks for the ideas!

-Matt



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