Started Feb 14, 2015
Started this discussion. Last reply by Chuck aa0hw Jul 2, 2019.
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brief demo of a REMOTE VLF-LF band transmitter/receiver with 9 QRQ CW ops present and sending CW
More details about the REMOTE VLF TRANSMITTER - REMOTE VLF ANTENNA here on playlist:…Continue
Posted on March 18, 2020 at 2:43pm
Brief experimental setup using the AD5DZ CW KEYER, to directly send 18.200 Khz CW AUDIO to a 20 watt audio amp...from the audio amp output to a large BLUE IRON POWDER TOROID 4 to 1 balun - then to the input of a compact 21 foot long DELTA LOOP wire antenna with one leg of the delta loop connected to a series resonant capacitor(6uF)
Posted on February 20, 2020 at 4:44pm
this is an experimental test setup to get rid of narrow band CW filter SEA SHELL BACKGROUND HOWLING, and QRQ CW Ringing...
by using a:
1. SIMPLE GATE
2. SIMPLE CW BANDPASS FILTER
the gate silences the "in between" cw element sea shell howling, and ringing, but also causes key clicks...
the following CW BANDPASS…Continue
Posted on February 18, 2020 at 12:16pm
brief demo of testing a VLF TRANSMITTER and VLF RECEIVER for QRQ CW operations
this is a follow up video to the first two using a VLF RECEIVE - BIPOLAR TESLA COIL with a FERRITE CORE antenna...the Transmitter is a tiny DELTA LOOP(7 foot per side) fed by a 5 watt audio amp…
Posted on February 16, 2020 at 2:19pm
Posted on February 14, 2020 at 12:43pm — 1 Comment