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Author Topic: Shortwave Crystal Radio  (Read 1203 times)

Offline Davep

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Shortwave Crystal Radio
« on: February 07, 2020, 2130 UTC »
I haven't made one of these in awhile. 
I used an old coil form from a 1920s TRF , and old post marked "aerial " and some misc components that are modern .
This is just a trial run to verify operation before cosmetics.
The box to the left is a LM 386 chip and power supply I use for audio to check operation before any more work . It will have its own chip eventually.
The coil is 5 winds primary ( antenna) and 9 turns secondary on a 4 inch. 
Here it is pulling in WWCR sign on   Also heard WTWW playing music on 5085 , it seems to have pretty good spacing.
Dx machines they are not, but fun to build.
I am on new radio restriction, so work was after hrs on the down low

https://m.youtube.com/watch?v=mLCe8WBt6E8
« Last Edit: February 08, 2020, 1837 UTC by Davep »
Va Beach Virginia
Modified Dx 394 audio Altec Lansing ACS43
Folded dipole

Matt285

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Re: Shortwave Crystal Radio
« Reply #1 on: February 07, 2020, 2138 UTC »
Pretty cool. Sorry to hear your grounded from electronics. It happens to all of us at some point

Offline pinto vortando

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Re: Shortwave Crystal Radio
« Reply #2 on: March 04, 2020, 0006 UTC »
That is really cool.   8)
The "skunk works" nature of the project makes it all the more fun.   ;)
Das Radiobunker somewhere in Michigan