|Subject:||Re: LF: Another impedance matching question. Paul's audio amps.|
|From:||DK7FC <[email protected]>|
|Date:||Sun, 14 Apr 2019 17:40:07 +0200|
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Hi Chris,What are you planning? Building a ground loop into your garden will be the only way to put that power into the antenna. At VLF and your E field antenna, you would have to deal with several 10 kV if you actually want to run > 1 kW. However on a ground loop, the amplifier will be the limiting factor :-) How much space to you have between the electrodes? All you will need is a series C to resonate the antenna. Use a big ferrite transformer to match the output impedance to the antenna impedance. Always use a series C on the primary side of the transformer, if bridged or not, to avoid any damage due to an eventual DC-component.
Use a big ferrite core with just enough primary turns as necessary. Now its time for Andy to post the formula again. 73, Stefan Am 14.04.2019 15:37, schrieb Chris Wilson:
Hello LF'ers Having collected my audio amp from Paul Nicholson (VERY many thanks Paul, it's an awesome looking beast.... :)) I would appreciate anyone else getting one posting their thoughts and results matching the input and output for VLF usage. Both for antenna and ground comms usage. Thanks.
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