Total posts : 45366
Just completed the kit and modified it for longwaves.
L4 and L7 were replaced by two 5000 microhenrys chockes.
The 3 meters supplied antenna is now 15 meters. The frequency choosen is 279 kHz. measured voltage at test points : 15.32 VDC with unmodulated carrier. No Hum and good warn sound.
As I built the kit in South America, I am using a fixed tuner (LW, MW & FM) so I was unabled to estimate the range. Also the 21 meters antenna runs horizontaly inside an apartment, but back in Europa, I will build an external vertical antenna of 20 meters.
Thanks to all for your comments.