[BC] How would you build it?
James Potter
jpotter at jpotter.com
Thu Jul 31 14:27:28 CDT 2014
Don:
Sounds like a tube compliment from the ARRL Radio Amateur's Handbook circa 1935. I especially appreciate the link-coupling suggestion. What about the neutralizing wire adjacent to the tube envelopes?
Re: 833s -- The Chicoms are very good imitators. Wonder if there is a domestic requirement for them for those bottles?
However! The 4CS250Bs made in China really stink. Their service life is weeks.
I understand Romania or Bavaria (one of those -ia countries) makes a credible 807. That's advanced technology over there. They're skipping solid-state entirely and going directly to thermionic emission amplification devices that glow in the dark. Reduces their heating and lighting bills in their transmitter shacks.
/J
>-------- Original Message --------
>From: Donald Chester <k4kyv at hotmail.com>
>Pair of 849s in link-coupled push-pull final, modulated by another pair of 849s in class B. Etc.
>BTW, you can still get new 833As, made in China (just like everything else). Reportedly, Chinese tube manufacturers have about made it through the learning curve and greatly improved QC; some of the Chinese tubes made now are said to be pretty good.
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