Troubleshooting 600-series TransOceanic problems
Peter Wieck of rec.antiques.radio+phono supplies the following information:
Typically, there are three reasons why any given miniature-tube T/O does not
1. Burnt out tube (all but the 600-series uses 5 tubes in series, the 600 adds
2. Bad selenium rectifier.
3. (MOST COMMON) A dirty bandswitch. All the signals go through the BC section
of the bandswitch, so if this is weak or dirty, nothing from any band.
Add to these three, several less common problems:
1. The headphone jack is dirty, and the shorting tabs are not making contact.
2. The Line/Battery switch is not making correct contact.
3. With the 600-series, the connections on the cord-reel are corroded or
4. Again, with the 600-series, the right-angle plug is broken at the join
between the plug and the cord.
The first thing to do with any T/O, even before it is plugged in is to clean
the coil-tower and band-switches. DeOxit is best, but R/S tuner-cleaner (the
cheap stuff... you do not need the added red dye and perfume) will do the
trick. Thoroughly saturate the band-switch and work it briskly. Then do it
Then test the tubes. All of them. BE VERY CAREFUL with 1.4V tubes, making sure
that you DO NOT plug them in or pull them out with the tester turned on.
Reserve the 1L6 aside and insert a 1R5 for all testing purposes. If you have a
problem, you pop a $3 tube, not a $30 one.
If you have the skills and wherewithall to remove the chassis, do so and clean
the volume pot & tone switches. This is not necessary for testing, but
At this point, if you have good tubes and a clean bandswitch, and a good 50A1
ballast (also an expensive tube), you may try the radio on a variac. You should
get *at least* some noise, if not a playing radio at around 85-90V or so.. It
has been my experience across now about 15 of the 600 series radios that there
are seldom (never seen one in this series) bad filter caps.
If you still have nothing, then you need to remove the chassis for further
tests... another long post. But with the general cleaning of the band-switch,
other switchgear, and good tubes, you should be there for most common problems.
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