"Matthew E. McNeely" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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I have a wonderful early TR-4 that works well except that sometimes when I change bands with the band switch I hear a snap sizzle sound and resistor R40 a 470 ohm resistor burns up. I replace the resistor and the TR-4 works fine except that the upper and lower usb lights are both on in the upper ssb position for any band. if I let the TR-4 sit for while without being used after the initial repair the ssb indicator lights work as they should.
So my question for those more knowledgeable than are out there is what may be going on? I don't see why R40 is blowing up? and what that has to do with the usb lsb lights and why when the unit sits over night after the repair things work correctly.
Oh by the way the ssb works just fine it seems like just the lights or the light switching is what is fouled up.
Thanks in advance for any help.
Matt
K1MCN
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