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"Mike" == M J Powell writes:

Jack I accidentally reversed the polarity of my DC power supply. I
Jack blew the fuse in my TNC, but I can't find a fuse in my TR-7400A
Jack and the only fuse I see in my TS-520 appears to be for the AC
Jack power supply.

Jack What sort of damage could these radios have suffered?

Mike You may have blown the 'idiot diode' as well as the fuse..

I have the schematic to the TS-520, so I can look for an obvious diode
near the power connector but I don't have the schematic for the
TR-7400A. If anyone out there has the schematic and knows where this
idiot diode is, let me know.

Mike Mike -- M.J.Powell

Jack.
- --
Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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