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[Amps] Addition to FL2100z problem

To: <amps@contesting.com>
Subject: [Amps] Addition to FL2100z problem
From: sm5dqc at algonet.se (Osten B Magnusson)
Date: Tue Apr 8 10:07:37 2003

Hello again!

I changed the tubes between sockets, first it was the tube
at left that became ''red'', when changed it's the same one
now in the other socket. So it's obvious I have a bad tube,
it's Taylor 572B's from 1994 production.

I think I have a pair of Cetron tubes, but don't want to put
them in until I get to know the reason for the following:

In addition to the bad tube, there seems to be a bias problem,
why does the FL2100z shows 50 mA Ip in ''stand by''?? That
it's only 60 mA in ''operate''  - no drive -  can probably be
adjusted.

The first notice of the problem was that my TenTec Corsair II
''shut down''  - the power supply security function -  at times,
never happened without the amp.

Maybe this is to ''simple'' for this reflector, but I'm a old DX'er,
I have not built or worked with amps for many years...  I have
an amp project  - KW for 160 and 80 with one tube -  but DX 
takes too much time!!

73 de Osten SM5DQC    sm5dqc@algonet.se





 


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