I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
Thanks,
Nicholas
classicradiorepair@hotmail.com
Your radio uses push-pull 42's for output. Pull one of these tubes at a time and see it the radio still operates, it should. Measure voltage on pin #4 of the two output tubes. Both tubes should be around 30 volts negative on these pins.
Distortion at loud volume will be in the audio section, 75 or 42 tubes. Alignment would not cause this problem.
Norm
: Hello,
: I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: Thanks,
: Nicholas
: classicradiorepair@hotmail.com
I replaced the tubes with a set of NOS Philco and changed the speaker again, results improved slightly from before, but the radio is still badly distorted. I just wanted to make sure that the tubes were not causing the problem. I checked the voltage on Pin #4 of the 42 tubes and I read 85 volts negative to the chassis. This is not close to 30 negative. The radio will still perform with one or the other 42 removed. I am wondering what to look for as to what is causing the voltage problem. I was told to replace the two coupling caps going to the control grids of the output tubes by someone else, this being inside a bakelite block. I've never had to replace one of those before. Is there anywhere I can look on how to replace those? The schematic I have for this radio confuses me as to the layout...very hard to follow. Thanks again for your help,
Nicholas
classicradiorepair@hotmail.com
: Hi Nicholas
: Your radio uses push-pull 42's for output. Pull one of these tubes at a time and see it the radio still operates, it should. Measure voltage on pin #4 of the two output tubes. Both tubes should be around 30 volts negative on these pins.
: Distortion at loud volume will be in the audio section, 75 or 42 tubes. Alignment would not cause this problem.
: Norm
:
: : Hello,
: : I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: : Thanks,
: : Nicholas
: : classicradiorepair@hotmail.com
-85 volts is too negative. This will cause tubes to go into cutoff and distort.
There is a voltage divider, #66 in the schematic. Part of it may be open? There are three sections, 10 ohms, 110 ohms and 130 ohms. Check out this resistor. Your problem is in this circuit.
Information on repairing bakelite blocks can be found at Chuck's site but this isn't the problem causing excessive negative grid voltage.
http://members.aol.com/caschwark/
Norm
: Hello,
: I replaced the tubes with a set of NOS Philco and changed the speaker again, results improved slightly from before, but the radio is still badly distorted. I just wanted to make sure that the tubes were not causing the problem. I checked the voltage on Pin #4 of the 42 tubes and I read 85 volts negative to the chassis. This is not close to 30 negative. The radio will still perform with one or the other 42 removed. I am wondering what to look for as to what is causing the voltage problem. I was told to replace the two coupling caps going to the control grids of the output tubes by someone else, this being inside a bakelite block. I've never had to replace one of those before. Is there anywhere I can look on how to replace those? The schematic I have for this radio confuses me as to the layout...very hard to follow. Thanks again for your help,
: Nicholas
: classicradiorepair@hotmail.com
:
: : Hi Nicholas
: : Your radio uses push-pull 42's for output. Pull one of these tubes at a time and see it the radio still operates, it should. Measure voltage on pin #4 of the two output tubes. Both tubes should be around 30 volts negative on these pins.
: : Distortion at loud volume will be in the audio section, 75 or 42 tubes. Alignment would not cause this problem.
: : Norm
: :
: : : Hello,
: : : I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: : : Thanks,
: : : Nicholas
: : : classicradiorepair@hotmail.com
The resistor #66 checks out fine. If the problem in in the 42 circuit, what sort of things should I be looking for? Thanks for all your help.
Nicholas
classicradiorepair@hotmail.com
: Hi Nicholas
: -85 volts is too negative. This will cause tubes to go into cutoff and distort.
: There is a voltage divider, #66 in the schematic. Part of it may be open? There are three sections, 10 ohms, 110 ohms and 130 ohms. Check out this resistor. Your problem is in this circuit.
: Information on repairing bakelite blocks can be found at Chuck's site but this isn't the problem causing excessive negative grid voltage.
: http://members.aol.com/caschwark/
: Norm
: : Hello,
: : I replaced the tubes with a set of NOS Philco and changed the speaker again, results improved slightly from before, but the radio is still badly distorted. I just wanted to make sure that the tubes were not causing the problem. I checked the voltage on Pin #4 of the 42 tubes and I read 85 volts negative to the chassis. This is not close to 30 negative. The radio will still perform with one or the other 42 removed. I am wondering what to look for as to what is causing the voltage problem. I was told to replace the two coupling caps going to the control grids of the output tubes by someone else, this being inside a bakelite block. I've never had to replace one of those before. Is there anywhere I can look on how to replace those? The schematic I have for this radio confuses me as to the layout...very hard to follow. Thanks again for your help,
: : Nicholas
: : classicradiorepair@hotmail.com
: :
: : : Hi Nicholas
: : : Your radio uses push-pull 42's for output. Pull one of these tubes at a time and see it the radio still operates, it should. Measure voltage on pin #4 of the two output tubes. Both tubes should be around 30 volts negative on these pins.
: : : Distortion at loud volume will be in the audio section, 75 or 42 tubes. Alignment would not cause this problem.
: : : Norm
: : :
: : : : Hello,
: : : : I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: : : : Thanks,
: : : : Nicholas
: : : : classicradiorepair@hotmail.com
Something has to be wrong with this resistor to have that large of voltage drop unless a 42 tube is gassy. A gassy tube should be blue glow within the elements.
The current for your radio goes through this resistor. If the values are corrent your radio is drawing more than twice the current it is supposed to draw. Total resistance should be around 250 ohms. You read 85 volts on grid of 42's. This means the radio is drawing 340 ma. Something should be very hot. If nothing seems too hot try bridging sections of this resistor with 100 ohms.
Norm
: Hello,
: The resistor #66 checks out fine. If the problem in in the 42 circuit, what sort of things should I be looking for? Thanks for all your help.
: Nicholas
: classicradiorepair@hotmail.com
: : Hi Nicholas
: : -85 volts is too negative. This will cause tubes to go into cutoff and distort.
: : There is a voltage divider, #66 in the schematic. Part of it may be open? There are three sections, 10 ohms, 110 ohms and 130 ohms. Check out this resistor. Your problem is in this circuit.
: : Information on repairing bakelite blocks can be found at Chuck's site but this isn't the problem causing excessive negative grid voltage.
: : http://members.aol.com/caschwark/
: : Norm
: : : Hello,
: : : I replaced the tubes with a set of NOS Philco and changed the speaker again, results improved slightly from before, but the radio is still badly distorted. I just wanted to make sure that the tubes were not causing the problem. I checked the voltage on Pin #4 of the 42 tubes and I read 85 volts negative to the chassis. This is not close to 30 negative. The radio will still perform with one or the other 42 removed. I am wondering what to look for as to what is causing the voltage problem. I was told to replace the two coupling caps going to the control grids of the output tubes by someone else, this being inside a bakelite block. I've never had to replace one of those before. Is there anywhere I can look on how to replace those? The schematic I have for this radio confuses me as to the layout...very hard to follow. Thanks again for your help,
: : : Nicholas
: : : classicradiorepair@hotmail.com
: : :
: : : : Hi Nicholas
: : : : Your radio uses push-pull 42's for output. Pull one of these tubes at a time and see it the radio still operates, it should. Measure voltage on pin #4 of the two output tubes. Both tubes should be around 30 volts negative on these pins.
: : : : Distortion at loud volume will be in the audio section, 75 or 42 tubes. Alignment would not cause this problem.
: : : : Norm
: : : :
: : : : : Hello,
: : : : : I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: : : : : Thanks,
: : : : : Nicholas
: : : : : classicradiorepair@hotmail.com
I looked the radio over, nothing I can find appears to be to hot. I threw the 100 ohm resistor across #66, and it brought the voltage on the pins of both 42 tubes to 30.6 volts negative. Although voltage is correct, the radio sounds no different than before. Am I seriously missing something here? Maybe the problem is not just with the voltage on the 42's? The voltage on the #4 pin of the driver 42 in the three in this set remains the same with or without the resistor (-5v), obviously, it shouldn't be changing. Let me know what you are thinking.
Thanks again,
Nicholas
: Hi Nicholas
: Something has to be wrong with this resistor to have that large of voltage drop unless a 42 tube is gassy. A gassy tube should be blue glow within the elements.
: The current for your radio goes through this resistor. If the values are corrent your radio is drawing more than twice the current it is supposed to draw. Total resistance should be around 250 ohms. You read 85 volts on grid of 42's. This means the radio is drawing 340 ma. Something should be very hot. If nothing seems too hot try bridging sections of this resistor with 100 ohms.
: Norm
: : Hello,
: : The resistor #66 checks out fine. If the problem in in the 42 circuit, what sort of things should I be looking for? Thanks for all your help.
: : Nicholas
: : classicradiorepair@hotmail.com
: : : Hi Nicholas
: : : -85 volts is too negative. This will cause tubes to go into cutoff and distort.
: : : There is a voltage divider, #66 in the schematic. Part of it may be open? There are three sections, 10 ohms, 110 ohms and 130 ohms. Check out this resistor. Your problem is in this circuit.
: : : Information on repairing bakelite blocks can be found at Chuck's site but this isn't the problem causing excessive negative grid voltage.
: : : http://members.aol.com/caschwark/
: : : Norm
: : : : Hello,
: : : : I replaced the tubes with a set of NOS Philco and changed the speaker again, results improved slightly from before, but the radio is still badly distorted. I just wanted to make sure that the tubes were not causing the problem. I checked the voltage on Pin #4 of the 42 tubes and I read 85 volts negative to the chassis. This is not close to 30 negative. The radio will still perform with one or the other 42 removed. I am wondering what to look for as to what is causing the voltage problem. I was told to replace the two coupling caps going to the control grids of the output tubes by someone else, this being inside a bakelite block. I've never had to replace one of those before. Is there anywhere I can look on how to replace those? The schematic I have for this radio confuses me as to the layout...very hard to follow. Thanks again for your help,
: : : : Nicholas
: : : : classicradiorepair@hotmail.com
: : : :
: : : : : Hi Nicholas
: : : : : Your radio uses push-pull 42's for output. Pull one of these tubes at a time and see it the radio still operates, it should. Measure voltage on pin #4 of the two output tubes. Both tubes should be around 30 volts negative on these pins.
: : : : : Distortion at loud volume will be in the audio section, 75 or 42 tubes. Alignment would not cause this problem.
: : : : : Norm
: : : : :
: : : : : : Hello,
: : : : : : I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: : : : : : Thanks,
: : : : : : Nicholas
: : : : : : classicradiorepair@hotmail.com
I actually have a philco 650 which I know nothing about (as far as year). I got it at a used store for $40.00 + tax :-)
When I got it home the finish on the radio was on a scale from 1 to 10 I would say about a 8.
The power cord was frayed. So I replaced that. I pluged it in, it receives radio stations but there is a bad electrolytic cap hum in it.
I looked under the unit again and one of the capacitors had leaked. I would like to replace that cap but It does not tell the voltage or the MFD on it.
Does anyone know what the rating on that cap is?
It is the one if you are looking in the back of the radio it would be the very front top right can capacitor.
Someone has sometime or another changed out the volume/switch control and got the ohms wrong cause it is kinda loud at low volume control levels. Does anyone know what ohmage that control is?
And least but not last I am looking for a schematic for this radio. Anyone have one or know where I can find one on the net?
Thanks.
John
I also have a Philco 650 that I recently repaired. I have schematics both in printed and electronic format that I am willing to share. You can also find the 650 information at Nostalgia Air's link to Riders Online!
Your capacitor has a value of 8 mfd. The parts list does not specify the voltage rating, and I don't recall if there is a voltage rating on the can, but I suggest 450 WVDC. By the way - notice that the outside of this capacitor is insulated from ground. The negative side of it should be about -30VDC with respect to the chassis. If you replace it with a metal can capacitor, be sure to insulate it from the chassis.
The volume control is 2 Meg total with a tap at 400K for the tone control. Not exactly a common part, but don't give up yet. This control has one side that is grounded through a metal strip that is pressed between the front body of the control and the chassis. In mine, there was enough oxidation on the chassis to cause an unreliable ground connection. This can effectively put the volume control in series with the detected audio signal causing high volume at any setting of the control. To check for this problem, find the terminal of the volume control that is ground and connect a wire from it to a good chassis ground point. If the volume problem clears up, you've found the problem and can either leave the wire in permanently, or take out the control and fix the ground connection.
If you need further assistance, please let me know.
Good Luck.
Bob
: Hello,
: I actually have a philco 650 which I know nothing about (as far as year). I got it at a used store for $40.00 + tax :-)
: When I got it home the finish on the radio was on a scale from 1 to 10 I would say about a 8.
: The power cord was frayed. So I replaced that. I pluged it in, it receives radio stations but there is a bad electrolytic cap hum in it.
: I looked under the unit again and one of the capacitors had leaked. I would like to replace that cap but It does not tell the voltage or the MFD on it.
: Does anyone know what the rating on that cap is?
: It is the one if you are looking in the back of the radio it would be the very front top right can capacitor.
: Someone has sometime or another changed out the volume/switch control and got the ohms wrong cause it is kinda loud at low volume control levels. Does anyone know what ohmage that control is?
: And least but not last I am looking for a schematic for this radio. Anyone have one or know where I can find one on the net?
: Thanks.
: John
Are you still looking for the problem in your Philco 650?
According to my schematic, there are no coupling capacitors in the output stage, the audio is transformer coupled from the 42 driver to the push-pull 42 output amplifiers. Is yours different?
Try measuring the voltage at each point on the voltage divider. It should be about -27 VDC at the top, -13 VDC at the second tap, and about -1.125 at the bottom. This means there should be about 14 volts across the 130 ohm section, about 12 volts across the 110 ohm section, and 1.125 volts (of course) across the 10 ohm section. The B+ supply should only deliver about 110 ma. when the set is operating normally.
Now, if your 85 volts is distributed across the divider as 44, 37, and 4 volts respectively, that indicates something is drawing 230 ma. between B+ and chassis ground, and as Norm pointed out - something should be hot! Check capacitors #71, #86, #87, #44, and #31A. Resistor #72 will be hot normally, but check the resistance.
If your 85 volts is distributed in different proportions than 44-37-4, then something connected to one of the divider legs is drawing the excess current.
If you have a high input impedance voltmeter (at least 10 Megohms), check the voltage across resistor #61. It should be negligible unless capacitor #63 is leaking or the 42 driver is gassy or shorted. Likewise, the voltage across resistor #65 should be negligible. This resistor has such a high value (1 Megohm) it would prevent too much current in this leg of the divider, so I doubt you will find anything here.
I'd be interested in what you find the voltages in the divider to be, or what you found if you've already located the problem.
Let me know if I can be of any further help.
Bob
: Hello,
: I looked the radio over, nothing I can find appears to be to hot. I threw the 100 ohm resistor across #66, and it brought the voltage on the pins of both 42 tubes to 30.6 volts negative. Although voltage is correct, the radio sounds no different than before. Am I seriously missing something here? Maybe the problem is not just with the voltage on the 42's? The voltage on the #4 pin of the driver 42 in the three in this set remains the same with or without the resistor (-5v), obviously, it shouldn't be changing. Let me know what you are thinking.
: Thanks again,
: Nicholas
: : Hi Nicholas
: : Something has to be wrong with this resistor to have that large of voltage drop unless a 42 tube is gassy. A gassy tube should be blue glow within the elements.
: : The current for your radio goes through this resistor. If the values are corrent your radio is drawing more than twice the current it is supposed to draw. Total resistance should be around 250 ohms. You read 85 volts on grid of 42's. This means the radio is drawing 340 ma. Something should be very hot. If nothing seems too hot try bridging sections of this resistor with 100 ohms.
: : Norm
: : : Hello,
: : : The resistor #66 checks out fine. If the problem in in the 42 circuit, what sort of things should I be looking for? Thanks for all your help.
: : : Nicholas
: : : classicradiorepair@hotmail.com
: : : : Hi Nicholas
: : : : -85 volts is too negative. This will cause tubes to go into cutoff and distort.
: : : : There is a voltage divider, #66 in the schematic. Part of it may be open? There are three sections, 10 ohms, 110 ohms and 130 ohms. Check out this resistor. Your problem is in this circuit.
: : : : Information on repairing bakelite blocks can be found at Chuck's site but this isn't the problem causing excessive negative grid voltage.
: : : : http://members.aol.com/caschwark/
: : : : Norm
: : : : : Hello,
: : : : : I replaced the tubes with a set of NOS Philco and changed the speaker again, results improved slightly from before, but the radio is still badly distorted. I just wanted to make sure that the tubes were not causing the problem. I checked the voltage on Pin #4 of the 42 tubes and I read 85 volts negative to the chassis. This is not close to 30 negative. The radio will still perform with one or the other 42 removed. I am wondering what to look for as to what is causing the voltage problem. I was told to replace the two coupling caps going to the control grids of the output tubes by someone else, this being inside a bakelite block. I've never had to replace one of those before. Is there anywhere I can look on how to replace those? The schematic I have for this radio confuses me as to the layout...very hard to follow. Thanks again for your help,
: : : : : Nicholas
: : : : : classicradiorepair@hotmail.com
: : : : :
: : : : : : Hi Nicholas
: : : : : : Your radio uses push-pull 42's for output. Pull one of these tubes at a time and see it the radio still operates, it should. Measure voltage on pin #4 of the two output tubes. Both tubes should be around 30 volts negative on these pins.
: : : : : : Distortion at loud volume will be in the audio section, 75 or 42 tubes. Alignment would not cause this problem.
: : : : : : Norm
: : : : : :
: : : : : : : Hello,
: : : : : : : I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: : : : : : : Thanks,
: : : : : : : Nicholas
: : : : : : : classicradiorepair@hotmail.com
If the PhatB3Hammond@aol.com email address dont work, then email me at GreatB3Sound@hotmail.com
Thanks again.
John
: I am restoring a Philco 650 console radio, and I've ran into some problems. The radio plays with no electrolytic hum and is just as selective as it shoud be, but the sound is very distorted. At low volume, the radio sounds fine. At medium volume, the radio sounds raspy. At a loud volume, the radio is so distorted, one cannot distinguish music from speech. At loud volume, the radio is no longer raspy, it just sounds like alot of different pitch clicks in place of the voice. I've replaced the two electrolytic filter caps and all paper capacitors. I have also checked the tubes and they are fine. I checked the speaker, and it appears to be ok. I tried out the radio on another early Philco speaker and I got the same results. I am lost at where to go. I doubt the radio is misaligned. Would out of tolerance resistors cause this? Bad bakelite capacitor blocks? (I hope not.) If you can point me in the right direction on where to look next on this project, I would really appreciate your help.
: Thanks,
: Nicholas
: classicradiorepair@hotmail.com
This sounds like the classical case where a guy has a disease, and goes from doctor to doctor to have someone tell him that nothing needs to be done.
You have bad capacitors! You probably have open or away off value resistors too. You're just going to face up to it that you'll need to re-cap the set. At age 65, is it reasonable to expect all capacitors to be good? he bakelite blocks are no big deal to rebuild. As a rule, you can remove the screw mounting them, carefully swing the block up, carefully dig the old caps out of the enclosure, clean it out, then install new caps in it. I use orange drops, and they fit into the case reasonably well. I've rebuild probably hundreds of them.