At some point I want to do more VLF tests but my health has been against this. I need to improve my earth-electrode "antenna" before doing more tests.
See https://sites.google.com/site/g3xbmqrp3/vlf/8-97khz-earth-mode-transmitter
14 Apr 2017
VLF Transmitter
This image has been posted before.
The link takes you to my 5W transmitter that I used a few years ago from my old QTH to cover 6km by utilities assisted earth-mode. I tried a test using this TX over a 32km radiated path without success. A test in 2014 from the new QTH was a total failure! The TX is based on a TDA2003 audio IC. It used a keyer to produce a preprogrammed message in either CW or QRSS3.
At some point I want to do more VLF tests but my health has been against this. I need to improve my earth-electrode "antenna" before doing more tests.
See https://sites.google.com/site/g3xbmqrp3/vlf/8-97khz-earth-mode-transmitter
At some point I want to do more VLF tests but my health has been against this. I need to improve my earth-electrode "antenna" before doing more tests.
See https://sites.google.com/site/g3xbmqrp3/vlf/8-97khz-earth-mode-transmitter
I am currious what impeadance you believe the earth to be?
ReplyDeleteIs there any reason to not use a 100+watt stereo audio amplifier as a transmitter?
Another question. There are farms with long fences, miles long in some cases, have you tried these as xmit or recieve antennas?
Ken
K1KLW