Have recently purchased a SP-600 JX-17 in "working/as is" condition.
the good.....it works on the lower 3 band ranges. The bad, it is "as
is" aka nothing (no signals, nouise, static, etc) at all on the higher
3 band ranges. Am interested in any initial troubleshooting ideas
folks may have. Thanks in advance for the assistance - winter is
coming and I'll need the tube heat!