[NJARC] Reflexed Superhet?

[Al Klase]

Hi John,

Check out the Radiotron Designers Handbook - Fourth Edition.

Apparently the Australians did this a lot. Perhaps they were being TAXED 
on the number of tubes. Otherwise the $0.25 or so for another tube is 
not a big deal.

Al

John Ruccolo wrote:
> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Hi Al/Folks,
>
> Al, your mention of a possible reflexed superhet
> design got me to thinking (!) on they way home from
> the meeting. Why didn't the big-time 5-tube AA
> manufacturers try that to cut costs? They could have
> used a crystal diode detector, and eliminated one
> tube.
>
> We've all seen those cheapy 4-tubers that eliminate
> the IF stage (Arvin made lots of them), and are weak
> performers only good for metro areas -- "City Mouse,"
> as you would say. But your design (in theory) would
> have given the same performance as a 5-tuber but with
> 4 tubes (and a diode). I wonder if any production set
> was ever built like that? Or perhaps the 12SQ7 or
> 12AV6 was just too cheap and convenient to optimize
> out of the circuit.
>
> Regards,
>
> JR
>
> PS -- no, I'm not stealing your design for the HB
> contest. I already have my own quirky superhet on the
> drawing board.
>
>
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-- 
Al Klase – N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/