On Tue, 13 Oct 1998 16:39:43 +0100 Carsten Esch
<carsten.esch@olympus-software.com> writes:
>Hi,
>
>thanks for responding to my question regarding D44BCs Problem. I just
>got the info that he is using the 76 PA and not the 78.....
>You all suggested a bad tube and I also think that this is the case.
>However I would like to hear from you (now that I am sure on the
>model)
>if anything else could cause this problem.
>Thanks again for your help!
That is a 3 tube 8874 amp Carsten and I would still suggest driving with
one tube at a time after checking the DC and RF tank circuitry first;
20-30W or so on 20M will suffice.
The 76PA is also a fairly simple conversion to two 3CX800A7's.
GL Carl KM1H
>
>Carsten, DL6LAU - J75T - OJ0AU - ...
>
>
>----
>origial post should read now:
>
>D44BC got a problem with his Alpha 76 PA amplifier, maybe some of you
>guys
>can help us to guess what could cause this problem:
>
>When switching the amp on evrything is ok. As soon as you apply drive,
>and anode current is flowing, the amp will switch off. You can switch
>it
>on again, some result than.
>
>We will visit D44BC for the CQWW CW contest. Would be nice to get his
>amp running....
>
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