Yup...tubes are stone cold dark...not a heck of a lot in that circuit
to fail besides the feed-thru's and the choke...maybe Evan was right
on the money..
On Oct 25, 2009, at 2:47 PM, Tom Evans, AG9X wrote:
"meters light, but tubes are dead"
So you're saying that the tubes do not light up at all?
On Sun, Oct 25, 2009 at 9:55 AM, Richard Radke <rar...@excite.com>
wrote:
All,
I was working the CQ WW DX Friday night (C line and L4B) on 40,
picking up a couple "new ones", cndx here were just so,so. All was
well, shut down. Resumed Saturday morning,
20 sounded in great shape. Tuned up the twins on the new band,
kicked in the L4B, and nothing. Amp turns on, no smoke, meters
light, but tubes are dead. HV present (1900 and 2600 volts).
I installed Mike's upgrade kit 2 years ago, with new bleeders, in-
rush protection, and additional cooling. I replaced the feed-thru
caps last year because of a gird current issue. It's been working
well, putting out about 1300 watts into a dummy load.
My question is. What are the chances of both tubes going at the
same time? In looking at the schematic, the panel lights are on
the same side of the filament xfmr as the tubes. Assuming if the
panel lights light, I've got voltage out of the xfmr. One or both
of the feed-thru caps or filament choke? Those are pretty robust
components, rated at 20 amps (if I remember right) and very hard to
find and get out. I can probably build the choke if needed.
Any thoughts on what to be looking for before I dive in?
Rick
W9WS
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