National NC-88 questions
I'm working on an NC-88 and a couple things aren't sitting right with me.
1. Overall 'oomph' seems to be missing. It receives well enough but
even benchside listening requires that the volume be up to about 75%.
Doesn't seem right. An AA5 would blow it away. Finger on the volume
pot wiper gives a very healthy hum so the problem must be further back.
2. BFO. Works but is really weak. I tried more coupling but no
increase. The Sensitivity control has to be almost at the floor to hear
it. Its really too weak to be functional.
Recapped, many resistors found out of tolerance, voltage checks are all
ok. Some previous owner had the IFs badly mistuned. Found an
intermittent factory joint on the bandswitch.
I guess what I'm asking are these 'features' typical of the NC-88? I
wouldn't think so. Maybe the two symptoms are related?
Thanks for any comments.
-Bill WX4A
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