[NJARC] Reflexed Superhet?

[John Ruccolo]

I agree, but you gotta consider not only the cost of
the tube, but the socket and some addtional assembly
time. When you're in a price competion for selling
miilions of 19.95 AA-5's (or AA-4's in this case), if
you can shave 50 cents in parts and labor off the cost
of the set, that makes a big differerence, IMHO. I'm
still surprised no American manufacturer (that I know
of) tried it. Probably somebody did, and it was a
flop, for whatever reason. 

Back then, folks were trained to think "the more
tubes, the better the radio." So most folks wouldn't
buy a 4-tube set, even if it had the *same*
performance as a 5-tuber that they could buy for a
couple of bucks more.

JR
--- Al Klase <al at ar88.net> wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> 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/
> 
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