Why did I get this in response to posting on this list??
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Larry - I've taken 450-470 MHz Micor 25 watt mobiles & ran them on
only the pre-driver to get about 9 watts out (I bypassed the rest of the PA
deck). I also had to bypass the power control board to make it work reliably.
-- Original Message --
> "[EMAIL PROTECTED]" wrote:
> >
> > I have
I agree with Neil's comments, and have had similar experience and luck
doing so.
There really isn't anything to it, much easier than the "Hack-Saw 10
watt VHF IPA"
Kevin
Neil McKie wrote:
> Although I haven't experimented with the 406-420 Micors, I have
> done some trouble shooting on the 45
I have not done this on a 420 Micor, but I have on a
450 Micor, which is essentially the same.
As Neil pointed out, all the interstage coupling is
done at 50 ohms, so you only need to decide how much
power you need, and modify accordingly.
The controlled stage will put out 2 to 7 watts, if you
pu
ew PA deck sections to run them at lower
> power, and still has some notes on how they did any matching, etc.
> Larry
>
> -Original Message-
> From: Eric Lemmon <[EMAIL PROTECTED]>
> Sent: May 10, 2005 6:26 PM
> To: Repeater-Builder@yahoogroups.com
>
n them at lower power, and still has some notes
on how they did any matching, etc.
Larry
-Original Message-
From: Eric Lemmon <[EMAIL PROTECTED]>
Sent: May 10, 2005 6:26 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Micor mobile transmitter
Bruce,
Althou
One time a few years ago, one of the now lurkers on this remailer,
brought his 100 watt high-band Mocom-70 to me to tune up for him.
On a lark, I decided to run it wide open in this case with 16
Volts DC. Wide open, the 100 watt transmitter put out 240 watts.
Ran my 100 watt U
Bruce Nanney wrote:
>Thanks Eric and Brian for the info. I've been able to run it for 10 yrs @110
>watts on 145.270 without any problems in an air conditioned environment. But
>I'm moving it to a remote location without a/c. I guess I will leave it as
>is, as I need the power as much as I can g
brucenanney wrote:
>What is the best way to reduce power on a 100 watt micor mobile for
>repeater use? I have redused the voltage in to 12.8 volts and have
>developed a cooling system on the P.A. deck that has constant air flow
>over the circut board as well as the the heatsink.
> Thanks, Bruc
er on this machine.
Wide area crossband 8 rx site system.
Thanks again guys, Bruce KD4BOH.
- Original Message -
From: "Eric Lemmon" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, May 10, 2005 8:26 PM
Subject: Re: [Repeater-Builder] Micor mobile transmitter
> Bruce,
>
>
Bruce,
Although you can disconnect half of the four final transistors and change
the matching components appropriately to have a 50 watt PA, it's better to
simply exchange the 100W amplifier board for a lower power board. I'm
guessing that you could probably find someone to swap boards with, mayb
Hi There!
Micor mobiles do not like be lowered below 2/3 rated output.. they like to go boom!
I had a couple of 100 watters that both went funny even thought I had them in the 60-65 watt range. they were replaced with 40 and 60 watters and those micors are still playing today. I ha
What is the best way to reduce power on a 100 watt micor mobile for
repeater use? I have redused the voltage in to 12.8 volts and have
developed a cooling system on the P.A. deck that has constant air flow
over the circut board as well as the the heatsink.
Thanks, Bruce KD4BOH.
Yaho
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