ARLA/CLUSTER: Construir transmissores de 1920 com as técnicas usadas na época

[João Costa > CT1FBF]

Hacking Transmitters, 1920s Style

Hackaday reports on Andy Flowers K0SM who recently recreated some
early transmitters using the same resources and techniques from the
1920s for the Bruce Kelley 1929 QSO Party

Apart from vacuum tubes (which could be purchased) and meters (which
could be scrounged from automobiles) Flowers recreated his own ferrite
plate and outlet condensers for tuning the antennas. The spiderweb
coils may not be as common today, but can be found in older Crosley
receivers and use less wire than comparable cylindrical coils.

Read the story and watch the video at
https://hackaday.com/2019/11/28/hacking-transmitters-1920s-style/