Would anyone have an idea as to why I have distortion out of a radio after all caps replaced. It will make a high squell sound until warm and then work fine. Could it be a resitor issue or caps in tuning dial anyone else with this issue?

:Would anyone have an idea as to why I have distortion out of a radio after all caps replaced. It will make a high squell sound until warm and then work fine. Could it be a resitor issue or caps in tuning dial anyone else with this issue?
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Possible bad tube; replace audio or detector tubes first, one at a time. Poor ground or tube shield that is not making good connection. Resistors will usually increase in value with heat (and age), so I would not suspect a resistor problem unless the radio played well, then started to squeal.
Johnnysan-

::Would anyone have an idea as to why I have distortion out of a radio after all caps replaced. It will make a high squell sound until warm and then work fine. Could it be a resitor issue or caps in tuning dial anyone else with this issue?
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:Possible bad tube; replace audio or detector tubes

first, one at a time. Poor ground or tube shield that is not making good connection. Resistors will usually increase in value with heat (and age), so I would not suspect a resistor problem unless the radio played well, then started to squeal.
:Johnnysan-
:Well the radio starts off ok. Then will run for a second or two then die. Then after a few times it will run the give a squeal and die. Then after a few more times will run with no problem. The only other thing i notice is the dc voltage seems to start running lower. I have replaced all caps and tried replacing tubes one at a time.
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I would suspect as johnnysan has, the divider resistors from the cathode power supply.

:I would suspect as johnnysan has, the divider resistors from the cathode power supply.
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Thermal problems like that are sometimes caused by just a bad connection. Old solder joints where a lot of connections are made can hide a problem. There is also a lot of ground points. I would probe the wiring and the components with a piece of hard plastic while it is playing. See if you can find a sensitive area.

:Thermal problems like that are sometimes caused by just a bad connection. Old solder joints where a lot of connections are made can hide a problem. There is also a lot of ground points. I would probe the wiring and the components with a piece of hard plastic while it is playing. See if you can find a sensitive area.
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Mike said ""That is my thought as well. I am now suspecting the volume control. I find that when I play with it starts to work again and then squell.""
Mike - an ohmeter check should tell you whether your control is intermittent or not - slowly rotate the control as you check from the wiper to each end of the control - wiggle at the same time - I've seen many with worn carbon on the wafer , cracks in the wafer and breaks where the attachments are made to the wafer (sometimes riveted) - a lot of controls can be carefully disassembled, cleaned etc. and put back together.
I doubt that its a wirewound but a lot of them had a grease in them that hardens with age and prevents the wiper from making contact.
I didn't look at the schematic - but its likely your radio is supposed to have spray shield tubes - were any replaced with non-spray shield tubes - the spray shielding doesn't do anything if it isn't grounded - check the tube base clips that are supposed to make contact with the spray shielding - see if they are corroded. Either of those conditions can make the tubes oscillate and squeal.
In Rogers and Majestic sets the pin used to ground the metal "can" of metal tubes (usually pin 1 I think) is not always connected to anything - the grounding of the tubes is done through clips which contact the spray shielding - If you substitute a 6K7 metal tube for a 6K7M - the can of the 6K7 may not be grounded - I learned this the hard way - I used to think if I didn't have a 6K7M - no problem - stick in a 6K7 metal - strange things start to happen .... you may have to add the ground wire if using metal tubes.

: Mike said ""That is my thought as well. I am now suspecting the volume control. I find that when I play with it starts to work again and then squell.""
: Mike - an ohmeter check should tell you whether your control is intermittent or not - slowly rotate the control as you check from the wiper to each end of the control - wiggle at the same time - I've seen many with worn carbon on the wafer , cracks in the wafer and breaks where the attachments are made to the wafer (sometimes riveted) - a lot of controls can be carefully disassembled, cleaned etc. and put back together.
: I doubt that its a wirewound but a lot of them had a grease in them that hardens with age and prevents the wiper from making contact.
: I didn't look at the schematic - but its likely your radio is supposed to have spray shield tubes - were any replaced with non-spray shield tubes - the spray shielding doesn't do anything if it isn't grounded - check the tube base clips that are supposed to make contact with the spray shielding - see if they are corroded. Either of those conditions can make the tubes oscillate and squeal.
: In Rogers and Majestic sets the pin used to ground the metal "can" of metal tubes (usually pin 1 I think) is not always connected to anything - the grounding of the tubes is done through clips which contact the spray shielding - If you substitute a 6K7 metal tube for a 6K7M - the can of the 6K7 may not be grounded - I learned this the hard way - I used to think if I didn't have a 6K7M - no problem - stick in a 6K7 metal - strange things start to happen .... you may have to add the ground wire if using metal tubes.

Hi and thanks for that info. I didnt even think about the use of non spray tubes at the time but may be the answer I am looking for. This radio was set up for them and has about 3 non spray tubes in it and are not grounded now that I think about it.
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:: Mike said ""That is my thought as well. I am now suspecting the volume control. I find that when I play with it starts to work again and then squell.""
:: Mike - an ohmeter check should tell you whether your control is intermittent or not - slowly rotate the control as you check from the wiper to each end of the control - wiggle at the same time - I've seen many with worn carbon on the wafer , cracks in the wafer and breaks where the attachments are made to the wafer (sometimes riveted) - a lot of controls can be carefully disassembled, cleaned etc. and put back together.
:: I doubt that its a wirewound but a lot of them had a grease in them that hardens with age and prevents the wiper from making contact.
:: I didn't look at the schematic - but its likely your radio is supposed to have spray shield tubes - were any replaced with non-spray shield tubes - the spray shielding doesn't do anything if it isn't grounded - check the tube base clips that are supposed to make contact with the spray shielding - see if they are corroded. Either of those conditions can make the tubes oscillate and squeal.
:: In Rogers and Majestic sets the pin used to ground the metal "can" of metal tubes (usually pin 1 I think) is not always connected to anything - the grounding of the tubes is done through clips which contact the spray shielding - If you substitute a 6K7 metal tube for a 6K7M - the can of the 6K7 may not be grounded - I learned this the hard way - I used to think if I didn't have a 6K7M - no problem - stick in a 6K7 metal - strange things start to happen .... you may have to add the ground wire if using metal tubes.
:
:Hi and thanks for that info. I didnt even think about the use of non spray tubes at the time but may be the answer I am looking for. This radio was set up for them and has about 3 non spray tubes in it and are not grounded now that I think about it.

Well thanks for the info I just grounded those tubes and seems to have resloved the issue. Being a newbie I didnt even think about that issue but it appears it is one to remeber with rogers spray tubes.
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Great - intermittent problems like that really take away from enjoying the radio - on to the next one !!

An old technician dies, and goes to heaven. He still has a workshop in heaven, but not a lot of repairs on his shelves to work on. He sees that another not so honest technician has gone to hell, and has lots of work on his shelves. The technician in heaven asks the Lord, why does that guy have more repair items than I do? The Lord says, they are All Intermittent.

:An old technician dies, and goes to heaven. He still has a workshop in heaven, but not a lot of repairs on his shelves to work on. He sees that another not so honest technician has gone to hell, and has lots of work on his shelves. The technician in heaven asks the Lord, why does that guy have more repair items than I do? The Lord says, they are All Intermittent.
:

:An old technician dies, and goes to heaven. He still has a workshop in heaven, but not a lot of repairs on his shelves to work on. He sees that another not so honest technician has gone to hell, and has lots of work on his shelves. The technician in heaven asks the Lord, why does that guy have more repair items than I do? The Lord says, they are All Intermittent.
:
Now that's cool!