Wednesday, January 11, 2017

Putting the 80 meter receiver in one place.

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 This is the circuit Tom posted. I modified the tuning and regeneration controls. This one works if you have the components. The modifica...
Tuesday, December 27, 2016

Alternate RF gain for the Odd To Me Regen

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There is always someone finding a problem with whatever is posted. The original circuit used an established method. It has been in use for...
Saturday, December 24, 2016

The Odd-to-me SW regen update.

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The original circuit and the fix.  I'm not a big fan of the LM386. This is my AF stage. NOTE: Use a 100K pot with the receiver to ...
Friday, December 23, 2016

Exploring the world of 3DQ or the mystery of zero bias devices

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If you say zero bias in the wrong places they will start collecting fire wood and a stake. Let's don't go into this with a closed mi...
Friday, December 16, 2016

Making a slug tuned coil with pictures.

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My explanation without pictures was a bit confusing. I had a little shop time today and made a new coil. I took the camera along to docume...
Wednesday, December 14, 2016

Varactor tuning circuit.

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Here is the basic circuit with some things to consider when sizing parts. I have seen 10k pots in tuning circuits. There is really nothing...
Tuesday, December 13, 2016

The tuning system starts here with a slug tuned coil.

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You need two blocks about 1" square and 1-1/2" long. I used plastic. Stack the blocks and drill a hole where the green line is. ...