Product Detector Circuits (was Re: [Boatanchors] 51J's vs R-338's?

[WA5CAB at cs.com]

On a related subject, can anyone recall a similar article for any receiver 
using one of the octal based converter tubes like the 6/12SA7 or 6/12K8?  
Likewise for using something like a 1N34 or 1N914 in place of a 6/12H6 in a noise 
limiter, AGC rectifier or 2nd Detector circuit.  I have a bunch of noise limiter 
modification kits for the TCS receivers, and had thought for years that it 
would be a neat trick to add a product detector with them.

In a message dated 11/6/2005 10:40:58 AM Central Standard Time, 
manualman at juno.com writes: 
> Ham Radio Mag had a Bill Orr article on replacing the 6BA6 BFO tube in
> the 51J3 and replacing it with a 6BE6 and adding and changing a few
> components to provide the BFO and product detector function.

Robert Downs - Houston
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