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
