[sdiy] Advice for selling gear: FCC part 15 certification?

[Grant Richter]

> Wonder what Grant does for his modules.....Hey Grant!

The analog modules fail the definition of a digital device, therefore part
15 is not applicable.

While a VCO generates pulses over 9 kHz, it doesn't use digital techniques.
It would be interesting to see a lawyer prove an op-amp is digital.

There are no crystals, no RF clocks, none of the traditional digital RF
generators. Pulse edges are a slow (by RF standards) and frequencies are
very low (by RF standards). Everything is carefully filtered and shielded to
keep RF out. In analog, bandwidth and slew rate are deliberately limited to
below RF. This is to keep RF out of the audio signal path, but it has the
equal effect of suppressing RF radiation out of the analog device.

You also have to take into consideration the intent of the law. It's
intended to prevent harmful interference to emergency radio services and
navigational aids. If there is an FCC complaint, it's the customers
responsibility to cease operation.

To my knowledge, none of the 6500 Moog modules or 15,000 Serge modules has
generated an RF interference complaint.