Saturday, February 06, 2010

HF radio (7) - YABFO (yet another bfo)

....Not much success with the previous BFO's (to much harmonics and some dificulty in stability), I decided to re-use one I did in 2002. Now it's rock solid and it works like a charm.
Schematic is from CT4ER web site and I only removed the BC547 since I switch the 9v directly (on to the rf chokes) from the LSB/USB switch.
Didn't had at that time the MPF102 transistors so I replaced with BF244. This was one of my last pcb's, after this I started doing everything Manhattan style.


In place:

1 comment:

Yustiadi said...

Hi.good work and gl