02-12-2019, 02:14 PM
it may sound like a lot of work but..... i think i can tell by some pics that you kept a lot of original resistors.
i have thousands of resistors if you get me a list of what you want... i can gather them up at no charge... then mail out to you.
to be honest,, im betting somewhere some how something about a resistor not being correct might be helpful.
also,, you may wanna play it for hours then come back and feel the heat coming off each resistor... or with a laser temp sensor.. see which area is hot... or if you have an app on your smart phone to do that or a camera IR type.
I personally would lay the radio on one of its long "sides" so that the underside components are facing you and the tubes / transformer are pointing away from you so the heat rises up into free air. this would be a reasonable way to get accurate heat monitoring readings when you check resistors by your method of choice.
i see what you are trying to achieve,, funny how this part kept me working on the "working radio" for a couple more weeks till i made various heat syncs, yet your finding yourself here as well...
i guess you could wrap that particular resistor with braided shield and bond that to the physical chassis... to wick the heat off.
most people here would probably say ,, "these sets have a lot of hot spots,, just put a bigger wattage resistor in there to get the heat down if you dont like it",, which i agree with. but your gut is telling you that something downstream is causing this one to get hot... same issue i ran into.
i ended up moving my pain in the butt resistor up to the top and doing it like this,,, which calmed everything down really good.... but it was considered and very extreme maneuver.
this might appear ridiculous but its how i ended up calibrating the heat "OUT". its the tall green thing in the pic.
i am by far no expert but what i have learned is if your IF voltages are not right,, it could cascade in either direction,,,, so maybe an easy thing to do now is let it cool down,, and do a resistance check on IF primary & secondary sections,,, yet with wires hooked up,, i would be compelled to disconnect wires to isolate the IF's,, thats just me.
i have thousands of resistors if you get me a list of what you want... i can gather them up at no charge... then mail out to you.
to be honest,, im betting somewhere some how something about a resistor not being correct might be helpful.
also,, you may wanna play it for hours then come back and feel the heat coming off each resistor... or with a laser temp sensor.. see which area is hot... or if you have an app on your smart phone to do that or a camera IR type.
I personally would lay the radio on one of its long "sides" so that the underside components are facing you and the tubes / transformer are pointing away from you so the heat rises up into free air. this would be a reasonable way to get accurate heat monitoring readings when you check resistors by your method of choice.
i see what you are trying to achieve,, funny how this part kept me working on the "working radio" for a couple more weeks till i made various heat syncs, yet your finding yourself here as well...
i guess you could wrap that particular resistor with braided shield and bond that to the physical chassis... to wick the heat off.
most people here would probably say ,, "these sets have a lot of hot spots,, just put a bigger wattage resistor in there to get the heat down if you dont like it",, which i agree with. but your gut is telling you that something downstream is causing this one to get hot... same issue i ran into.
i ended up moving my pain in the butt resistor up to the top and doing it like this,,, which calmed everything down really good.... but it was considered and very extreme maneuver.
this might appear ridiculous but its how i ended up calibrating the heat "OUT". its the tall green thing in the pic.
i am by far no expert but what i have learned is if your IF voltages are not right,, it could cascade in either direction,,,, so maybe an easy thing to do now is let it cool down,, and do a resistance check on IF primary & secondary sections,,, yet with wires hooked up,, i would be compelled to disconnect wires to isolate the IF's,, thats just me.