[NLRS] Fwd: 144 and 50 MHz amps FS to Aurora?

[dclemenson at gondtc.com]

> From: dclemenson at gondtc.com
> Subject: 144  and 50 MHz amps FS to Aurora?
> Date: Tue, 25 Apr 2006 20:15:41 US/Central
> -----
> Hi All,
> 
> I'm going to be down in MSP for Aurora and wonder if anyone going is interested
> in my old 144 amplifier setup. It was in service through last year and was
> working fine when I upgraded to a Commander VHF amp. 
> 
> I have 2 identical "FAA" amplifiers that I ran until last year with a hybrid
> ring setup on the input and output.  Each amp has a 4CX250B tube with a smaller
> driver tube.  I don't recall that tube number, I'm in a motel in Jamestown
> tonight.  Each amp will put out 350 watts, or more, and the combinbed setup runs
> 700 watts output.  Drive required is only a few watts.  I used this setup for
> over 10 years.  These amplifiers were actually AM transmitters for airports but
> the exciter portion is disabled or removed now.  These two were made by General
> Atronics and designated FA-78?? something.  Some of them were made by Collins
> with a TV-9 or TV-36 designation.  These are rack mount units, each one with
> it's own power supplies built in, something just under two feet tall and about
> 100 pounds each.  I have copies of some of the documentation including circuits
> description and schematics.  These amps have a dual cavity design that will also
> work as is on 222 MHz for 350+ watts and can be slightly adjusted to work on 432
> at about 300 watts output.  I'm using others of this model on 222 and 432 to do
> just that.
> 
> If someone wants the whole 144 setup, you provide your own T/R relays, I'd sell
> it for $350 with the input and output hybrid rings.  Sold separately, $200 each.
> 
> I will be home Wednesday night and can send .jpg pictures to anyone interested.
>  Thursday I'm on the road again and won't be back home before Saturday so I'd
> need to know by Thursday morning if someone is interested in having them brought
> to Aurora.
> 
> Also, I have a 4CX250B amp available for 50 Mhz.  This is a commercial low band
> VHF unit by GE. They rated it 330 watts output.  The amp is a small rack mount
> unit with a blower/power supply unit to fit in the rack just below it.  I didn't
> use the GE power supply.  I had one of the FAA amplifier units with just the
> power supply to provide the 2000 volts B+, 325 volts screen, and the negative
> bias supply.  It ran 350+ watts for me until last year when I upgraded to a
> 3CX800 amp.  I have the full original manual for the GE stuff.  The GE power
> supply doesn't have a regulated screen voltage since it was on FM.  You could
> add a regulator or a separate screen supply.  I'd like $150 for the GE amp
> chassis and GE power supply, no T/R relays.  That all takes up about two feet of
> rack space.  You could have the FAA power supply I used as well, but I'm not
> going to haul all this stuff to Aurora without some pretty strong interest. 
> Again, I can take some pictures Wednesday when I get home.
> 
> This stuff is available for pickup near Devils Lake, ND, or can be hauled to
> Aurora by arrangement.  Actually, it can be hauled to CSVHF in July as well.
> 
> Any takers?
> 
> Regards,
> 
> Dennis Clemenson NT0V
> 
> 
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