I have an Alpha 87A circa 1999-2000 bought new. It just chugs along but I am
not a contester and for the most part I feed resonant antennas.
73
Perry W1COW
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of GeorgeWallner
Sent: Monday, July 09, 2012 10:59 PM
To: David Jordan; Kurtis Burton; amps@contesting.com
Subject: Re: [Amps] Alpha 87A
"David Jordan" <wa3gin@comcast.net> wrote:
> Sounds about right. The older units need significant modifications to
>bring them up to current.
I have a 1993 vintage Alpha 87A. The only problems I had were with the T/R
switching PIN diodes (DPX-X103), which I had to replace three times so far.
The amp is getting about 50 hours of use per year, but most of that is in
costests, where it runs hard for 48 hours. The tubes are still original and
I get about 2000 W out with roughly 50 W drive (band dependent). As an amp
it meets my expectations (for a tube type amp) and I really can not see what
upgrades would justify $3000!
George
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