04-28-2017, 06:41 PM
opps.. a tad late
i removed center loktal retainer, lifted out teh insulator, extracted the pin.
I physically saw the spark gap cut into the plastic socket and along the edge on the underside of the insulator.
i sanded down the gap, sanded the insulator.
I sprayed the interior of the socket with varish made for wires & transformers.
I sprayed the center perimeter of the pin with insulating varnish as well.
Problem is now gone on this particular pin.
turned up power again, radio plays on am bands only,, it has Broadcast / AM / Phono only.
I hear static on SW and such,, will figure that out later.
My big problem now is with the updates to this schematics power supply,, the called out R102 was added to allow for a PM speaker.,, its directly off pin 8 of my rectifier tube.
This is the same reisistor that kept burning up on us in the 70's & 80's.,,and was the reason i am working on it now also.
I installed a 300ohm resistor that was about 3/8'' diameter and about 1'' long,, that one instantly got hot and i powered down.
I put 3) of the same physical size but 1k ohm parallel resistors in its place of the same size thinking i would be able to manage the heat (all in at 336 ohms),, no go.,, still got dangerously hot.
I installed this big a** 2'' long and prob 7/16'' diameter 500 ohm Green hollow resistor in in place of prior failures for R102. THis one hangs in there for a good long while but.... it got so hot the solder connection melted letting the resistor fall a bit.
so,, i am still stuck.
ideas?????
should i check my V8 socket to see if i have resistance to ground on one of them? the rectifier tube is not a loktal.
i removed center loktal retainer, lifted out teh insulator, extracted the pin.
I physically saw the spark gap cut into the plastic socket and along the edge on the underside of the insulator.
i sanded down the gap, sanded the insulator.
I sprayed the interior of the socket with varish made for wires & transformers.
I sprayed the center perimeter of the pin with insulating varnish as well.
Problem is now gone on this particular pin.
turned up power again, radio plays on am bands only,, it has Broadcast / AM / Phono only.
I hear static on SW and such,, will figure that out later.
My big problem now is with the updates to this schematics power supply,, the called out R102 was added to allow for a PM speaker.,, its directly off pin 8 of my rectifier tube.
This is the same reisistor that kept burning up on us in the 70's & 80's.,,and was the reason i am working on it now also.
I installed a 300ohm resistor that was about 3/8'' diameter and about 1'' long,, that one instantly got hot and i powered down.
I put 3) of the same physical size but 1k ohm parallel resistors in its place of the same size thinking i would be able to manage the heat (all in at 336 ohms),, no go.,, still got dangerously hot.
I installed this big a** 2'' long and prob 7/16'' diameter 500 ohm Green hollow resistor in in place of prior failures for R102. THis one hangs in there for a good long while but.... it got so hot the solder connection melted letting the resistor fall a bit.
so,, i am still stuck.
ideas?????
should i check my V8 socket to see if i have resistance to ground on one of them? the rectifier tube is not a loktal.