Pasmo 9kHz

[SQ4AVS]

https://sites.google.com/site/sub9khz/

[SP5ETB]

"to ensure success including
(a) as large an antenna system as possible,
(b) a very stable frequency source that is stable to a few uHz over many hours,
© high transmit power,
(d) efficient antenna matching systems with very low losses, and
(e) as effective a ground system as possible."
Z tych pięciu powodów w moim mieszkaniu nie mam szans, ale ciekawe.

[EI3HMB]

Zawsze zostaja nasluchy - differential amplifier z linka podanego w sasiednim temacie i prosto do karty dzwiekowej...