Amps
[Top] [All Lists]

[AMPS] SB-220 conundrum

To: <amps@contesting.com>
Subject: [AMPS] SB-220 conundrum
From: n4zr@contesting.com (Pete Smith)
Date: Wed, 19 Jan 2000 12:30:10 +0000
At 09:49 PM 1/18/00 -0500, Michael McCarthy, W1NR wrote:
>Pete,
>
>It is generally accepted that if max. power output does not
>co-incide with the plate current dip, you have a parasitic
>oscillation.  Why such a subtle change causes it is anyone's
>guess.

Without any other indications of instability?  'Way back when, the
conventional wisdom for grid-driven stages was that the plate dip and max
output setting of the plate cap always were a little off each other.  The
reason I can't tell ya.

Anyhow, the amp seems just as well-behaved on 40 as on the other bands.
Odd...

73, Pete Smith N4ZR
n4zr@contesting.com 

Don't forget to update your entry on the World Contest Station Database, at
http://206.102.70.3/search.htm

--
FAQ on WWW:               http://www.contesting.com/ampsfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm


<Prev in Thread] Current Thread [Next in Thread>