[HBR] A Homebrew design that is rarely mentioned

[Hopperdhh at aol.com]

The W5OMX article from QST, Jan. 1968,  can be downloaded from ARRL.COM by 
any ARRL member.

If Dave was a colonel  in 1968 (43 years ago), he could be SK by now.

Thanks, Walt, for your  information on this receiver.

I came across some more good info on beam  deflection mixers at this link:  
http://www.mail-archive.com/amradio@mailman.qth.net/msg03105.html

According  to this article the 7360 won't have much (if any) gain as a 
mixer working into a  9 MHz IF.  He says it approaches 22 dB loss at 9 MHz, but 
works OK at 1  MHz.  He does say it makes a good product detector.

I personally  built a product detector using the 7360 in a BC-348.  At 
first I had lots  of hum from the power transformer which was about 3 inches 
away.  No amount  of shielding had much effect.  I tried tube shields, 
mu-metal, and even a  piece of iron pipe!  I found that rotating the power 
transformer about 90  degrees would null out the hum.  I wonder what these stray 
magnetic fields  would do when the tube is used as an RF mixer.

Dan K9WEK