A single GS35b is a nice choice as well per your original power
objectives.? And at 4.7KV it will have pretty nice efficiency.? I
ran one here at 4.4KV for years.? Minimal heater current
requirements.? A socket can be built with minimal mechanical
hassle.
73/jeff/ac0c
alpha-charlie-zero-charlie
On 12/24/2023 10:22 AM, bill steffey
NY9H wrote:
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20 + amps at 12 volts??? just to light up 1 tube ,,,,,???? 2
tubes would be 40+ AMPS !!!!!
On 12/24/2023 3:41 AM, desmond auld
wrote:
Thanks everyone for replying. I live in Northern Ireland, call
sign GI0UTE.? I'm not aware of any qro builders nearby.? I have
ordered a few books as have been suggested and have stared
reading some of the web links posted. There is plenty to take
in!?
I agree a single GU5b with it's 2.5kw dissipation rating should
be enough to match my power needs, but perhaps two in parallel
would run cooler ( run a quieter fan?), and perhaps deliver more
gain? I have a 100w radio and don't really want to need to run a
"driver" amplifier, so would need a gain of over 10 dB, ideally
13 ish. Not sure how that's calculated yet from tube
characteristics.?
I'm in no hurry, and am not tied to using this tube, so am open
to suggestions.?
Thanks again all, and merry Christmas! Des, GI0UTE?
--
link to my QRZ listing
