Re: sound card AM Transmitter

glen herrmannsfeldt wrote:
Jerry Avins wrote:
(snip)

Do you know any sound cards that can reproduce 100 KHz with sidebands? Masoud doesn't know better, but you ought to.

I thought he wanted 20kHz. NIST used to believe that 20kHz
was a fine carrier frequency, but last I knew the time
standard had moved up to 60kHz.

There are also stories of submarine radio transmitters at 7Hz.
(The resonant frequency of the earth for radio signals.)

Glen,

Have you been following the thread? Masood wants to make an AM transmitter using a sound card. The length of the necessary antenna became an issue. Dirk of NeoPax suggested that an inductive loop at 100 KHz might be intended; I responded to that.

Masood has at last responded with some details. I asked for more. Maybe it will soon become clearer.

Jerry
--
Engineering is the art of making what you want from things you can get.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
.

Relevant Pages

  • Re: sound card AM Transmitter
    ... was a fine carrier frequency, but last I knew the time ... There are also stories of submarine radio transmitters at 7Hz. ... Masood wants to make an AM transmitter using a sound card. ...
    (comp.dsp)
  • Re: sound card AM Transmitter
    ... Masoud doesn't know better, but you ought to. ... was a fine carrier frequency, but last I knew the time ... standard had moved up to 60kHz. ... There are also stories of submarine radio transmitters at 7Hz. ...
    (comp.dsp)