Скачать или смотреть use Toroidal Power Transformer to transfer LF BAND RF POWER from audio amp to delta loop antenna

demo of using a TOROIDAL POWER TRANSFORMER as an interface between an AUDIO AMP(20W) output(4ohm) at 33.333 Khz on the LF BAND... and the low(1ohm) input of a compact delta loop antenna...

demo this setup by sending Morse Code directly at the LF band using the AD5DZ CW KEYBOARD, using sound cards that can operate at a 192 Khz sample rate...

NOTE: the receive LF BAND antenna for the recording laptop is an airdux coil, 10 inch long by 2 inch diameter with 10 ferrite rods inside the coil, 2 stacks of 5 each...hooked up directly to the recording laptop's MICROPHONE INPUT where QUISK SDR listens and demodulates the received CW SIGNAL at 33.333 Khz

NOTE: these TOROIDAL POWER TRANSFORMERs are also being used by the HAM RADIO "AM" OPs - as modulation transformers...
http://amfone.net/Amforum/index.php?t...

VLF Transmitter & Receiver experiments playlist:
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