On 2024-04-17 08:05, Dick wrote:
Anyone ever heard of this amp ? A Google search
comes up empty.
It's listed on that Auction Site.
Interesting - 6 sweep tubes. You'd need to gin up
a power supply for it; I'd guess 800V at a half amp or so + filaments. The connector looks a little oddball; like an octal plug, only 11 pins. I think SBE used similar on their
amp.
I'd expect it to struggle on 10M because of the interelectrode capacitances. I once
built a linear with 4 6LQ6 tubes. 10M was not attainable, and the loading coil for 15M was like a half a turn.
I have a Swan linear of similar vintage & design. It also has 6 sweep tubes. I got it
for a song at the flea market, sans tubes. I have replacement tubes, but a different type, and they take a different socket. Amazon yielded up matching ceramic sockets. That's in the forever queue of future projects.
Back in the day, sweep tubes were cheap because they were made in the millions for TV sets. That is no longer the case.
- Jerry, KF6VB
73, Dick, W1KSZ
Links:
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[1] /g/DRAKE-RADIO/message/77253
[2] /mt/105579079/243852
[3] /g/DRAKE-RADIO/post
[4] /g/DRAKE-RADIO/editsub/243852
[5] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
