Amps
[Top] [All Lists]

[Amps] SB220 running plate current when no drive

To: amps@contesting.com
Subject: [Amps] SB220 running plate current when no drive
From: Steve AA7V <aa7victor@gmail.com>
Date: Mon, 5 Oct 2020 11:03:30 -0700
List-post: <mailto:amps@contesting.com>
Hello to the group;

My SB220 has started to act up.

Immediately upon power on, the 3-500s both start drawing plate current. The
meter shows approximately 250 ma of current. It is apparent some component
has failed.

Also, it appears the grid current meter is showing a negative value (if
this is possible) as the needle now rests on the left peg.

I am not adverse to troubleshooting to the component level but would
appreciate any advice as to how to narrow my search to a specific set of
probable causes.

If I am unable to fix this amp, does anyone have any recommendations
towards a person that works on SB220s?

Regards

Steve AA7V
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps

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