Have swapped out all the regular paper caps on this radio. After a minute or so after being turned on the volume drops out. The station is still there and and still tuned in on the strongest point but lower volume. I need some direction. I did NOT swap out the domino caps. I have swapped out most all the resistors. There is one or two resistors that are so intertwined with the domino caps I did not risk damage in swapping them out. So I believe it is an audio circuit problem because the station stays on tune when the volume drops. I am thinking of changing out domino cap C14 along with its mated resistor R7 off of tube 6F5. Could one of these be causing my problem? how about domino cap C12 to ground off of same tube? I am also concerned with C11 and R8 off of tube 6H6. Does anyone have any input or has seen this problem before? The schematic for this radio is on this site. Thank you for your help. Just to say it again. Almost everything else has been replaced. Caps and resistors. Thank you for any input. joe

:Have swapped out all the regular paper caps on this radio. After a minute or so after being turned on the volume drops out. The station is still there and and still tuned in on the strongest point but lower volume. I need some direction. I did NOT swap out the domino caps. I have swapped out most all the resistors. There is one or two resistors that are so intertwined with the domino caps I did not risk damage in swapping them out. So I believe it is an audio circuit problem because the station stays on tune when the volume drops. I am thinking of changing out domino cap C14 along with its mated resistor R7 off of tube 6F5. Could one of these be causing my problem? how about domino cap C12 to ground off of same tube? I am also concerned with C11 and R8 off of tube 6H6. Does anyone have any input or has seen this problem before? The schematic for this radio is on this site. Thank you for your help. Just to say it again. Almost everything else has been replaced. Caps and resistors. Thank you for any input. joe

Joe:
If you have a DMM or VYVM, look at the AVC Voltage and B+ before and after the trouble starts. That will split the radio into three parts, the RF, audio and power supply. Then, we will know better which direction to go looking.
Lewis

::Have swapped out all the regular paper caps on this radio. After a minute or so after being turned on the volume drops out. The station is still there and and still tuned in on the strongest point but lower volume. I need some direction. I did NOT swap out the domino caps. I have swapped out most all the resistors. There is one or two resistors that are so intertwined with the domino caps I did not risk damage in swapping them out. So I believe it is an audio circuit problem because the station stays on tune when the volume drops. I am thinking of changing out domino cap C14 along with its mated resistor R7 off of tube 6F5. Could one of these be causing my problem? how about domino cap C12 to ground off of same tube? I am also concerned with C11 and R8 off of tube 6H6. Does anyone have any input or has seen this problem before? The schematic for this radio is on this site. Thank you for your help. Just to say it again. Almost everything else has been replaced. Caps and resistors. Thank you for any input. joe
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:Joe:
:If you have a DMM or VYVM, look at the AVC Voltage and B+ before and after the trouble starts. That will split the radio into three parts, the RF, audio and power supply. Then, we will know better which direction to go looking.
:Lewis

Wait, wait, wait!!!!
I just noticed the tuning eye. It is a VTVM all by itself. If the tuning eye opens, the trouble is in the RF. If it stays closed and doesn't dim, you have audio trouble. For now I'll assume it is audio trouble and study the schematic and get back to you.
Lewis

vtvm

Awsome, thanks for your help. I do believe the tuning eye stays closed when the volume drops. The tuning eye indication does not change. I will verify that tonight but I am quite sure. Thanks again I look forward to your help. Joe

:::Have swapped out all the regular paper caps on this radio. After a minute or so after being turned on the volume drops out. The station is still there and and still tuned in on the strongest point but lower volume. I need some direction. I did NOT swap out the domino caps. I have swapped out most all the resistors. There is one or two resistors that are so intertwined with the domino caps I did not risk damage in swapping them out. So I believe it is an audio circuit problem because the station stays on tune when the volume drops. I am thinking of changing out domino cap C14 along with its mated resistor R7 off of tube 6F5. Could one of these be causing my problem? how about domino cap C12 to ground off of same tube? I am also concerned with C11 and R8 off of tube 6H6. Does anyone have any input or has seen this problem before? The schematic for this radio is on this site. Thank you for your help. Just to say it again. Almost everything else has been replaced. Caps and resistors. Thank you for any input. joe
::
::
::
::
::Joe:
::If you have a DMM or VYVM, look at the AVC Voltage and B+ before and after the trouble starts. That will split the radio into three parts, the RF, audio and power supply. Then, we will know better which direction to go looking.
::Lewis
:
:Wait, wait, wait!!!!
:I just noticed the tuning eye. It is a VTVM all by itself. If the tuning eye opens, the trouble is in the RF. If it stays closed and doesn't dim, you have audio trouble. For now I'll assume it is audio trouble and study the schematic and get back to you.
:Lewis
:
:
:vtvm

:Awsome, thanks for your help. I do believe the tuning eye stays closed when the volume drops. The tuning eye indication does not change. I will verify that tonight but I am quite sure. Thanks again I look forward to your help. Joe

Joe:
I am pretty sure you are right about it being an audio problem, but more than once I have chased off in the wrong direction and wasted time trying to find a problem that wasn't there. Let's make sure its broke before we try to fix it. (;>)
Lewis

::Awsome, thanks for your help. I do believe the tuning eye stays closed when the volume drops. The tuning eye indication does not change. I will verify that tonight but I am quite sure. Thanks again I look forward to your help. Joe
:
:Joe:
:I am pretty sure you are right about it being an audio problem, but more than once I have chased off in the wrong direction and wasted time trying to find a problem that wasn't there. Let's make sure its broke before we try to fix it. (;>)
:Lewis
SO I STAND CORRECTED. I kept a close eye on the radio last night and after a minute the volume jumped down and the eye slightly opened up. upsetting. I tried to tune in the station again to get the strongest signal but that was it. When the volume drops out it stays on the signals strongest point, it just doesnt keep a constant volume. SO I kept it simple and swapped out the 6h6 tube with a new one. The radio seemed to work better but still not sure about the volume drop problem is gone. It did not do it with the new tube but it could be a over time discharge thing and could happend again. So in that case, would C11 or R8 be a problem? THose Idid not change out because they are intertwined together and the cap is a domino cap. WHich I am told never goes. Guess I have to try it again tonight once it sits all day. Hoping the tube fixes it but I don't think so. I understand there is not much to that quarter sized tube. Any thoughts? thanks for your help. Joe

:::Awsome, thanks for your help. I do believe the tuning eye stays closed when the volume drops. The tuning eye indication does not change. I will verify that tonight but I am quite sure. Thanks again I look forward to your help. Joe
::
::Joe:
::I am pretty sure you are right about it being an audio problem, but more than once I have chased off in the wrong direction and wasted time trying to find a problem that wasn't there. Let's make sure its broke before we try to fix it. (;>)
::Lewis
:SO I STAND CORRECTED. I kept a close eye on the radio last night and after a minute the volume jumped down and the eye slightly opened up. upsetting. I tried to tune in the station again to get the strongest signal but that was it. When the volume drops out it stays on the signals strongest point, it just doesnt keep a constant volume. SO I kept it simple and swapped out the 6h6 tube with a new one. The radio seemed to work better but still not sure about the volume drop problem is gone. It did not do it with the new tube but it could be a over time discharge thing and could happend again. So in that case, would C11 or R8 be a problem? THose Idid not change out because they are intertwined together and the cap is a domino cap. WHich I am told never goes. Guess I have to try it again tonight once it sits all day. Hoping the tube fixes it but I don't think so. I understand there is not much to that quarter sized tube. Any thoughts? thanks for your help. Joe

Joe: When you said: "and the cap is a domino cap. WHich I am told never goes." you set yourself for a bruising. Never say never about a component!! Serioulsy, the domino cap is vorking with very little strain on it, so I would be surprized if it were not good. So, let's keep an eye on things for a while. There isn't much to a 6H6 tube, but they do go bad, just like everything else.
Lewis

Thank you for your help. Just by switching out the one tube fixed the problem. I was all ready to start ripping apart my hard work and I am glad I did not. Just the 6H6 tube was dying. Thanks again for your help. JOe