----- Original Message -----
Sent: Friday, December 04, 2009 5:51
PM
Subject: LF: Active Antenna Preamp of
Bernd/DF8ZR
Hi Lowfers,
Now,
Bernd has posted the circuit of his preamp for active antennas:
http://www.mydarc.de/df8zr/lf-active-antenna.pdf
It?s
nothing fundamental new. But it?s just working very fine, with an overvoltage
shielded input. DLF (153kHz) gets attenuated by abt 40dB, compared to the sigs
in the wanted frequency range. Gain is abt 23dB. It was published in summer
2003 in the CQDL?
73,
Stefan
