[Amps] AM-495

[Bill L. Fuqua]

Yes,
    It had push pull 4x150A final. I replaced them with 4CX250B and used the full inductance of the plate coil and paralleled the capacitors that were previously in series. Since the capacitance was quadtrupled the resonance was halved. Also made a pi network out of it by adding a loading capacitor. It tuned 20 meters just fine and 15 meters as well. 

73
Bill wa4lav


-----Original Message-----
From: "crawfish" <crawfish at surfmore.net>
To: "amPS" <amps at contesting.com>, "Bill Fuqua" <wlfuqu00 at uky.edu>
Date: Mon, 20 Feb 2006 19:23:44 -0600
Subject: Re: [Amps] AM-495

The AM-8 was for 6 meters, wasn't it, Bill? I had a AM-495/GR. It was for 6
or 10m.I sold it long time ago. Always wanted another. I have seen an AM-494
for 2m. I found an AM-8/TRA-1 in IN last summer. I have the 73 Mag article
on modifying it to 6 or 2 meters.
                                  Joe W4AAB
----- Original Message -----
From: "Bill Fuqua" <wlfuqu00 at uky.edu>
To: "amPS" <amps at contesting.com>
Sent: Monday, February 20, 2006 8:59 AM
Subject: [Amps] AM-495


>     I am looking for an AM-495 or the commercial version of it. I had one
> many years ago that I modified to run on 20 and 15 meters with my 20A SSB
> exciter. I don't need the power supply or the tubes.  If you have one at a
> reasonable price please contact me. My conversion was simple. I connected
> the tubes in parallel (they were push pull) the paralleled the two
> capacitor sections and used the entire output coil with a loading
capacitor
> to form a Pi network.
>     I also paralleled the input capacitors and used the entire input coil
> for a tuned input. Neutralization was not needed on HF.  This worked well
> until I sold it.
>      If interested, I have an AM-8 to trade that has been converted to 60
> meters.
>
> 73
> Bill wa4lav
>
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