>Hello everyone,
>
>I've recently been experiencing a problem with my 30L-1 backup amp.
>On 10, 20, 40 and 80m normal operation. However, on 15m the
>amp has intermittent output. The tubes glow like they are functioning
>properly and the amp draws the appropriate current but nothing out.
>Occasionally the amp will produce a momentary output and then make a
>popping noise and cut out. ....snip...
What does the grid current do when the problem occurs?
Is drive applied when the popping noise is heard?
Has the value of the grid resistors changed? If so, how much?
What is the measured R of the vhf suppressor resistors?
Rich---
R. L. Measures, 805-386-3734, AG6K
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|