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[VHFcontesting] AM6154/6155

To: <vhfcontesting@contesting.com>
Subject: [VHFcontesting] AM6154/6155
From: crawfish@surfmore.net (Joe Crawford)
Date: Thu Jun 19 16:44:29 2003
The UHF model is called a AM-1178/GRC and uses a pair of 4CX250B's. A friend
of mine converted one and runs 100 watts output on FM. I am still looking
for my Fair catalog. I know they were in the first catalog I received this

----- Original Message -----
From: Bruce Herrick <bdh@teleport.com>
To: <vhfcontesting@contesting.com>
Sent: Friday, November 22, 2002 10:27 PM
Subject: [VHFcontesting] AM6154/6155

Does anyone know if these amps are still being manufactured?

I have been in a number of ARSR4 radar sites that have been built in the
last 5 years or so.  These are long range search radars jointly used by the
FAA and the Air Force.  Most have associated comm facilities, and I have
been surprised to see racks of new-appearing 6154/6155 amps.  An FAA tech at
one site told me he thought they were brand new, and that they were much
more reliable than the solid state units used in other facilities.

Another option for N9RLA to check out is a 2 - 4CX250R cavity sold by Fair
Radio a few years back.  They were used in airborne equipment and cover the
usual 225-400 MHz.  They are easily convertible to the ham bands and good
for 700+ watts.  I don't see them on the Fair website now but someone might
might know the nomenclature.  I have 2 but they are buried in storage at the
moment.  As Fair sold them they were refurbished with new tubes and sealed
in the typical military foil bags and wooden crates.  Fair sold them for
around $80, as I recall.  Detailed conversion instructions were available
via the web, somewhere.

Good luck!

Bruce Herrick WW1M

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