Radio Theory and design

Sunday, August 26, 2018

Making the tie points for the coil

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As you can see the loops are on the fiber glass rod. You could simply solder the lead wires to the wires and leave the rod but the single ...

winding a 20 tap coil

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The switch on the left is the units selector and the one on the right is the tens. They are able to select from 10 to 109 turns a single t...
Wednesday, August 22, 2018

Browning-Drake

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Browning drake A screen shot of the cover of the magazine linked above.
Monday, August 20, 2018

avalanche and tunnel effect in semi conductors

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Mr Polyakov explains this in his book "Semi Conductors made simple". If you read the book it may help with semiconductor theory....
Saturday, August 18, 2018

making Q-Dope

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If you have deep pockets you can just buy some for about $5 an ounce accept the health risk and skip the rest of the post. Otherwise ...
Friday, August 17, 2018

loop update

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A quick update on this project. When I installed the plastic tubing for the wire hangers I let it protrude out front and back. When I b...

selector switch knob selection

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As I said there are several options. I'm still looking a a couple. I didn't get any shop time today but I did bring in the knob I st...
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