I'll try a little solder on the rivets and lugs. From the plug to
the first lug is OK. Nothing on the other side, switch is open at
the rivet.
On 5/17/2025 1:27 PM, Jim Whartenby via
groups.io wrote:
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Emil
You didn't mention checking
to see if the ON / OFF switch rivets are high impedance thus
causing the switch to be permanently open.? You could
connect an ohmmeter to the line cord? plug and use a pick to
probe the switch solder lug / rivet mechanical connection to
see if you can read a low resistance on the ohmmeter.? A
little solder goes a long way to make a good contact between
the rivet and the solder lug.? Been there, done that.
Jim
Logic: Method used to
arrive at the wrong conclusion, with confidence.?
Murphy
The switch action is erratic. Contact cleaner has
had no effect.? I could jump the contacts and plug
the radio in to a power strip, but if there's an
organ donor radio out there with a good switch, I'd
like to find it.
73, Emil? de WD4SCZ
On
5/17/2025 11:44 AM, Jim Whartenby via groups.io
wrote:
Emil
Does the switch still "click" when
turned to the OFF position?? If so, take a close
look at the switch solder lugs on the switch
wafer.? There should be a rivet on each solder
lug that connects to the internal switch
contacts.? Ohm the rivet to rivet connection to
see if the problem is actually corrosion of the
rivets causing them to be insulated from the
solder lugs.? Soldering was earlier suggested
for tube sockets that have ground rings that are
also riveted to the chassis.? Clean and solder
the rivets to the tabs as necessary.
If this was not the problem, try
spraying some penetrating oil into the switch
body and exercised the switch several times.?
This also works to eliminate a scratchy volume
or tone control resistive elements.
Regards,
Jim
Emil