[Lowfer] 1940's voltage probe antenna....

[Michael Sapp]

Hi All:  I needed a break from work on Wed for a few hours and re-capped this 1940s Airline AA5 midget radio

I recently found on ebay for a reasonable price for some personal stress management...

https://www.dropbox.com/s/te35o9c9zt85n0f/IMG_4649.JPG?dl=0

Note the back metal plate on this radio is insulated from the chassis. It is the antenna. It has a fanstock clip to attach an
extra length of wire.

https://www.dropbox.com/s/16jdzc1xrs3vhom/IMG_4650.JPG?dl=0


Rather compact chassis layout....

https://www.dropbox.com/s/sk9r5urwwltk2pa/IMG_4651.JPG?dl=0


And permeability tuned. The RF and LO tuning slugs move in opposite directions with the tuning dial drive cord.

https://www.dropbox.com/s/0zxv77zg1m9g1u0/IMG_4653.JPG?dl=0

12SA7 converter tube and 12SK7 IF amplifier....


The schematic calls the back plate an "antenna plate"

https://www.dropbox.com/s/a045wf8awfp67wx/SCHEM.JPG?dl=0


It was great fun to have this little engineering gem come back to life....

https://www.youtube.com/watch?v=XDMERdCumxs

Last night I had it on the dining room table around 11PM and it was receiving WCBS in New York just fine on just the "voltage probe" plate antenna.  

Way too much fun... Thanks for the bandwidth.  73, Mike wa3tts