[sdiy] DC-1 MHz, through-zero FM, controlled, oscillator without core capacitor

[Jonatan Liljedahl]

tis 2 dec. 2025 kl. 22:49 skrev Donald Tillman <don at till.com>:

>
> It's also exactly how Morse code radio is received.  (Morse code radio
> does not transmit beeps.  The beeps are at the receiver where the local
> oscillator mixes with the received RF signal.)
>

Not only morse code (CW) but also single side-band transmission (SSB),
which is standard in HF radio. It uses half the bandwidth of AM, and also
potentially it needs less power than AM since the carrier doesn't have to
be transmitted.

>
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