[AMPS] Intermittent 8874

[Radiodan W7RF]

Jeff wrote:

> I have an Alpha 78 that one tube occasionally goes "cool" in, as if the
> filament isn't on. Then it ........

Hi Jeff,

It sounds like it is a bad connection somewhere. It should be a reasonably
easy fix.
Make a good physical exam and see what doesn't look like a solid connection.
maybe at the tube pins themselves (bottom) or further back to the
transformer connections.
The alpha 78 has a sub chassis that must be removed (or at least "tilted")
to see the bottom of the sockets.

73, Dan Magro W7RF, (President WARC 1999, member SCDXC, SCCC)
Manufacturers Rep & Distributor for HENRY RF Power Amplifiers.
www.radiodan.com <http://www.radiodan.com>     RFpower@radiodan.com
<mailto:RFpower@radiodan.com> A trip to our web site is worth the click!




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