so much for old age s-meter
YD-844A
Freq. drift curve
measure date April 18th 2010
temp is 10deg. C
Filter shape
this is psk31 receiving window through FT-101ES
still great enough for modern psk31 .
hooking up :
PC line in --------------------- FT-101 AF IN
PC line out ------------ FT-101 PHONE PATCH
PC RS232C RTS circuit ----------- FT-101 PTT
PC RS232C DTR circuit --------FT-101 CW KEY
PC GND -----------------------FT-101 GND
circuit 1
circuit 2
circuit 3
circuit 4
end