500pF Variable Capacitor Air Spaced with Wires and Control Knob For Crystal Sets Or Loop Antenna
$20.80
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HJW Electronics Pattern Listing
This is one item of used air spaced variable capacitor recovered from a 1960's transistor radio with a total maximum capacitance of 550pF. It is a dual capacitor with two sections of 190pF and 360pF connected together. The total minimum capacitance is approximately 25pF. The knob is provided, and the wiring may make it easier to connect into your crystal set, tuned receiving loop antenna, or other radio project.
Here are some example projects where you could use such a part:
Crystal Set One
https://www.interestingelectronics.com/old/henrys_interesting_electronics/loud_crystal_set_radio/loud_crystal_set_radio.htm
Crystal Set Two
https://www.interestingelectronics.com/old/henrys_interesting_electronics/crystal_radio_v2/crystal_set_radio_v2.htm
Choccy Block Crystal Set Radio Kit
https://www.usefulcomponents.com/main_contents/projects/choccy_block_crystal_radio/choccy_block_crystal_radio.html
Tuned Loop Aerial
https://www.interestingelectronics.com/old/henrys_interesting_electronics/am_radio_loop_aerial_booster/mw_lw_am_loop_aerial_antenna.htm
Superheterodyne MW AM Radio
https://www.interestingelectronics.com/old/henrys_interesting_electronics/mediumwave_radio/mediumwave_radio.htm
The Ladybird Book "Learnabout... Making a Transistor Radio." Radio
https://www.interestingelectronics.com/old/henrys_interesting_electronics/ladybird_radio/ladybird_radio.htm
Breadboard Six Transistor MW AM Radio Kit
https://www.usefulcomponents.com/main_contents/projects/breadboard_trf_radio/breadboard_trf_radio.html
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