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- PK232.3
- From: K4ON @ WB4GHL
- Subject: PK-232 Modification...
-
- The following might interest you (copied from K5FL MSO on RTTY):
-
- The following information was received from Wolf, ZS6AQC, concerning new
- Eproms for the PK-232 PAKRATT, plus a modification to eliminate noise from
- the op-amps. On recommendation of OM Piet, ZS6AQC I checked the noise in
- the power bus to the MC34074P op-amps and found (just like he said) that
- there is a lot of rubbish between the pins 4 and 11 of U23, 26, 28,30, 32
- and 34. So, I placed some 1 microFarad caps across them and my receive
- noise is much less (measured on a mark=space scope cross display). In fact,
- I can now even copy some steady signals that don't even raise the S-meter
- needle. Hope you can improve yours also? This was received from OD5NG: he
- made this mod and resulsts were outstanding.
- CONTINUED IN FILE PK232.18