The TLE1713 PA takes 1.4 watts input to make 92 watts output, before the
circulator, and about 75 watts after the circulator. The control wire takes
voltage, not a ground to make the amp work. Typically, about 6 volts for
full P.O.
lance N2HBA
----- Original Message -----
From: "John Everson" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Sunday, February 19, 2006 1:38 PM
Subject: [Repeater-Builder] UHF MIcor P.A. Woes.
> Hello to the group.
>
> My friend and I have a 75 Micor station on UHF that I was trying to
> resurrect to donate to a young local ham that has a UHF machine that
> needs to be replaced. The station in question was already in the ham
> bands, 444.xxx tx, 449.xxx rx. The previous owner had trouble with the
> PA dying all of the time, so he said, "get rid of it, I've had it with
> this thing".
>
> Well, I began to check this thing out and confirmed that the output was
> non-existent. I threw another PA in and still no output. So, I checked
> and tuned the circulator, checked and replaced the tripler/LLA, and now
> I have a clean and healthy 2 watts out of the LLA to the PA. The
> problem is, out of 5 different spares I have here, I get nothing, no
> go, no outty putty. I have checked the power control logic wire and the
> voltage seems to swing as it should during adjustment of the pot and
> changes during tx. Voltage to the main PA feed is a solid 14.3 volts on
> tx.
>
> My question is: How much power will the Micor PA take for input if I
> want to bench test these things? Can I just ground the PA control wire
> during testing? What is the reccomended bench test arrangement.
>
> I am having a bit of trouble believing that out of 5 spares, all are
> bad. I know that one was soft, one other was intermittent, but I
> thought that I had three solid spares.
>
> Maybe Not! Maybe my coffee hasn't kicked in and made the brain get
> going yet.
>
> Thanks in advance. John
>
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> Yahoo! Groups Links
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