[Amps] FS: Alpha 76A with 3CX800A7 tubes

[Carl]

110W drive is a bit hard on a pair of those tubes, that amp is PS limited 
anyway. At 80W and 1200W out they will last a long time.

Carl
KM1H


----- Original Message ----- 
From: "Paul" <w8aef at q.com>
To: "Amps" <amps at contesting.com>
Sent: Tuesday, July 24, 2012 1:12 PM
Subject: [Amps] FS: Alpha 76A with 3CX800A7 tubes


>I have an Alpha 76A equipped with a pair of 3CX800A7 tubes, Vacuum and reed
> relay for qsk operation, and an RF Parts RFC-3 choke that delivers 1500
> watts dc output on all amateur bands, including WARC.
>
>
>
> The 3CX800A7's were new old stock tubes installed in 2001 when I replaced
> the filter capacitors and converted it to QSK operation.
>
>
>
> The amplifier requires about 110 watts drive for 1500 watts output.  The
> original plate choke is included if you want to give up 12 meters and only
> have 100 watts for full power output.
>
>
>
> I fabricated transparent dials to replace the 0-100 dial scales on the 
> TUNE
> and LOAD controls and inserted a paper dial in back of them with band
> markings similar to the Heath SB-220.  This speeds up band change/retuning
> as I do not have to refer to a look up table.  The original 0-100 dial
> scales are included and the paper dial can easily be removed to allow 
> return
> to factory appearance.
>
>
>
> I am asking $1750, pick up in Phoenix, Arizona
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1424 / Virus Database: 2437/5151 - Release Date: 07/24/12
>