I picked up a Henry 2006A that apparrently needs repairs. The amp fires
up okay (reads this as lights up without smoke) but I noticed two anomalies.
First the grid current meter goes negative on power up and stays there My
Henry 2002A and 2004A do not do this. After the amp completes the warm up
cycle, if you go to TX with no drive, the grid current goes from negative to
~10-15 ma. If you apply a small amount of drive the amp is not showing but
about ~6 dB gain. With 10 watts drive I only see about 50 watts out and the
grid current meter is now pinned >40ma. These symptoms are the same with an
alternate NOS tube.
Any thoughts or suggestions would be appreciated.
Thanks in advance.
73's Mike K9MK/5
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