Radio Theory and design
Monday, June 28, 2021
The Andy oscillator low voltage version
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My friend gave me two versions of this oscillator to use in the 40/80. They both gave a flat output over their operating range. I have a 6 ...
Sunday, May 9, 2021
Using a piezo element
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The High Z element will require a high voltage low current drive. To control the frequency response we must adjust the coupling caps and the...
Monday, April 19, 2021
Antenna Book fo apartment dwellers
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Download here
Thursday, April 15, 2021
Turret board amp upgrade.
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I will use the double row layout. First step is to layout the components. I laid it out in spice so i could test the circuit. The si...
Monday, April 12, 2021
Amp, Coil, Turrets, Board
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Had a little shop time. (rainy day) Took the lid off an ice cream carton and made a coil form. I squared the material, Wrapped it around a...
Tuesday, April 6, 2021
Adding a pot to spice.
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symbol file .ASY ************* Version 4 SymbolType CELL LINE Normal 0 -36 0 -48 LINE Normal 0 48 0 36 LINE Normal -20 -3 -9 0 LINE Normal ...
Monday, March 29, 2021
filter input to reduce 'noise'
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Added C3 on input to modify the response.
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