Home  Resources  References  Tubes  Forums  Links  Support 
(No Subject)
11/12/2007 8:42:19 PMJob Goudie
I have a General Electric, model No. C452A which don't match the tube lineup as per the schematic. However, the tubes in the chassis matches the tube lineup on the cabinet....The tubes in this radio are as follows...35Z5, 35L6, 12SQ7, 12SK7,12BE6, 12SK7...I have searched various resources but can't seem to come up with a suitable schematic.Any ideas as to whats going on here????
Regards

Job

11/12/2007 9:27:33 PMNorm Leal
Hi Job

Most likely the size of a tube is different? A 12BE6 is a miniature of 12SA7. A company may start out with one and make a revision switching to the other. Circuit should be the same. If another tube is different let us know.

Norm

:I have a General Electric, model No. C452A which don't match the tube lineup as per the schematic. However, the tubes in the chassis matches the tube lineup on the cabinet....The tubes in this radio are as follows...35Z5, 35L6, 12SQ7, 12SK7,12BE6, 12SK7...I have searched various resources but can't seem to come up with a suitable schematic.Any ideas as to whats going on here????
:Regards
:
:Job

11/12/2007 11:00:02 PMJob
Norm----I appreciate your information re 12BE6 and 12SA7. Actually, I thought my problem was solved but when I checked the schematic at... http://techpreservation.dyndns.org/schematics/...I discovered it only had 5 tubes, whereas my radio has 6. There are two 12SK7 tubes in the radio I have. Also, the schematic is showing a clock which probably wouldn't matter except in this case it seems that the schematic is probably not for my radio. I'm not sure what other information I can give you to help find the right schematic.
Regards
Job

:Hi Job
:
: Most likely the size of a tube is different? A 12BE6 is a miniature of 12SA7. A company may start out with one and make a revision switching to the other. Circuit should be the same. If another tube is different let us know.
:
:Norm
:
::I have a General Electric, model No. C452A which don't match the tube lineup as per the schematic. However, the tubes in the chassis matches the tube lineup on the cabinet....The tubes in this radio are as follows...35Z5, 35L6, 12SQ7, 12SK7,12BE6, 12SK7...I have searched various resources but can't seem to come up with a suitable schematic.Any ideas as to whats going on here????
::Regards
::
::Job

11/13/2007 12:00:52 AMCarl T
Job,
Subbing the 12SA7 number in for the 12BE6, there are several GE's matching your tube line up.
L650, L651, L652, L660, LC628, LC628 and 321.
Maybe one of those schematics will match:
http://www.nostalgiaair.org/Resources/164/T0000164.htm
Carl T

:Norm----I appreciate your information re 12BE6 and 12SA7. Actually, I thought my problem was solved but when I checked the schematic at... http://techpreservation.dyndns.org/schematics/...I discovered it only had 5 tubes, whereas my radio has 6. There are two 12SK7 tubes in the radio I have. Also, the schematic is showing a clock which probably wouldn't matter except in this case it seems that the schematic is probably not for my radio. I'm not sure what other information I can give you to help find the right schematic.
:Regards
:Job
:
:
:
::Hi Job
::
:: Most likely the size of a tube is different? A 12BE6 is a miniature of 12SA7. A company may start out with one and make a revision switching to the other. Circuit should be the same. If another tube is different let us know.
::
::Norm
::
:::I have a General Electric, model No. C452A which don't match the tube lineup as per the schematic. However, the tubes in the chassis matches the tube lineup on the cabinet....The tubes in this radio are as follows...35Z5, 35L6, 12SQ7, 12SK7,12BE6, 12SK7...I have searched various resources but can't seem to come up with a suitable schematic.Any ideas as to whats going on here????
:::Regards
:::
:::Job

11/13/2007 11:57:18 AMJob
Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.

Job


:Job,
:Subbing the 12SA7 number in for the 12BE6, there are several GE's matching your tube line up.
:L650, L651, L652, L660, LC628, LC628 and 321.
:Maybe one of those schematics will match:
:http://www.nostalgiaair.org/Resources/164/T0000164.htm
:Carl T
:
::Norm----I appreciate your information re 12BE6 and 12SA7. Actually, I thought my problem was solved but when I checked the schematic at... http://techpreservation.dyndns.org/schematics/...I discovered it only had 5 tubes, whereas my radio has 6. There are two 12SK7 tubes in the radio I have. Also, the schematic is showing a clock which probably wouldn't matter except in this case it seems that the schematic is probably not for my radio. I'm not sure what other information I can give you to help find the right schematic.
::Regards
::Job
::
::
::
:::Hi Job
:::
::: Most likely the size of a tube is different? A 12BE6 is a miniature of 12SA7. A company may start out with one and make a revision switching to the other. Circuit should be the same. If another tube is different let us know.
:::
:::Norm
:::
::::I have a General Electric, model No. C452A which don't match the tube lineup as per the schematic. However, the tubes in the chassis matches the tube lineup on the cabinet....The tubes in this radio are as follows...35Z5, 35L6, 12SQ7, 12SK7,12BE6, 12SK7...I have searched various resources but can't seem to come up with a suitable schematic.Any ideas as to whats going on here????
::::Regards
::::
::::Job

11/13/2007 12:59:07 PMWatson Blount
Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
____________________

:Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
:
:Job

11/13/2007 5:31:59 PMJob
Sorry.....Made a mistake on that schematic number. It's G.E. 321A. Watson, I did check the new caps and they're o.k..
Job


:Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
:____________________
:
::Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
::
::Job
:

11/13/2007 6:36:12 PMWatson Blount
Job: The parts list shows the cap you subbed out as "three in one" with two 50uF @ 150v and a single 40uF @ 25v. Have you replaced the 40uF too? Watson

:Sorry.....Made a mistake on that schematic number. It's G.E. 321A. Watson, I did check the new caps and they're o.k..
:Job
:
:
:
:
::Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
::____________________
::
:::Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
:::
:::Job
::

11/13/2007 10:29:12 PMJob
Warson: Thanks for pointing out my error, in selecting a schematic, but the radio in question G.E., model no. C452A only has two electrolytic caps, not three. I'll select schematic L650 which only has two electro caps but I still can't figure out how I lost my B plus voltage when I installed new electrolytic caps....oh well, the trials associated with this wonderful hobby.
Regards.....Job
:Job: The parts list shows the cap you subbed out as "three in one" with two 50uF @ 150v and a single 40uF @ 25v. Have you replaced the 40uF too? Watson
:
:
:
::Sorry.....Made a mistake on that schematic number. It's G.E. 321A. Watson, I did check the new caps and they're o.k..
::Job
::
::
::
::
:::Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
:::____________________
:::
::::Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
::::
::::Job
:::
11/14/2007 10:50:05 AMRadiodoc
:Warson: Thanks for pointing out my error, in selecting a schematic, but the radio in question G.E., model no. C452A only has two electrolytic caps, not three. I'll select schematic L650 which only has two electro caps but I still can't figure out how I lost my B plus voltage when I installed new electrolytic caps....oh well, the trials associated with this wonderful hobby.
:Regards.....Job
::Job: The parts list shows the cap you subbed out as "three in one" with two 50uF @ 150v and a single 40uF @ 25v. Have you replaced the 40uF too? Watson
::
::
::
:::Sorry.....Made a mistake on that schematic number. It's G.E. 321A. Watson, I did check the new caps and they're o.k..
:::Job
:::
:::
:::
:::
::::Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
::::____________________
::::
:::::Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
:::::
:::::Job
::::

Job,

Make sure you have the replacement capacitors polarity right. If they are individual caps verify that the shell of the cap (covered with plastic/vinyl) is the minus/negative lead and the end that has an insulator with the wire/lead feeding thru is the plus/positive lead.

Radiodoc
**********

11/14/2007 7:28:06 PMJob
Gees, I feel so embarressed..I did have a capacitor reveresed. The thing is I was so adamant that I had them installed correct. It was an axial cap and I thought the black, rubberish end was negative.....sorry guys and thanks for your help.
Job


::Warson: Thanks for pointing out my error, in selecting a schematic, but the radio in question G.E., model no. C452A only has two electrolytic caps, not three. I'll select schematic L650 which only has two electro caps but I still can't figure out how I lost my B plus voltage when I installed new electrolytic caps....oh well, the trials associated with this wonderful hobby.
::Regards.....Job
:::Job: The parts list shows the cap you subbed out as "three in one" with two 50uF @ 150v and a single 40uF @ 25v. Have you replaced the 40uF too? Watson
:::
:::
:::
::::Sorry.....Made a mistake on that schematic number. It's G.E. 321A. Watson, I did check the new caps and they're o.k..
::::Job
::::
::::
::::
::::
:::::Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
:::::____________________
:::::
::::::Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
::::::
::::::Job
:::::
:
:Job,
:
:Make sure you have the replacement capacitors polarity right. If they are individual caps verify that the shell of the cap (covered with plastic/vinyl) is the minus/negative lead and the end that has an insulator with the wire/lead feeding thru is the plus/positive lead.
:
:Radiodoc
:**********

7/24/2009 8:50:49 PMJorge Serpa
Hello,

I have this radio too and I was hoping you might be able to help with a couple of things. I was wondering if you have the original knobs on yours and could provide a picture. My radio is now working but I have a temporary antenna because the back cover of my radio was missing. A picture of the inside of the cover and the back and any details that could help me fabricate a replica cover and antenna would really help me out.

:Gees, I feel so embarressed..I did have a capacitor reveresed. The thing is I was so adamant that I had them installed correct. It was an axial cap and I thought the black, rubberish end was negative.....sorry guys and thanks for your help.
:Job
:
:
:::Warson: Thanks for pointing out my error, in selecting a schematic, but the radio in question G.E., model no. C452A only has two electrolytic caps, not three. I'll select schematic L650 which only has two electro caps but I still can't figure out how I lost my B plus voltage when I installed new electrolytic caps....oh well, the trials associated with this wonderful hobby.
:::Regards.....Job
::::Job: The parts list shows the cap you subbed out as "three in one" with two 50uF @ 150v and a single 40uF @ 25v. Have you replaced the 40uF too? Watson
::::
::::
::::
:::::Sorry.....Made a mistake on that schematic number. It's G.E. 321A. Watson, I did check the new caps and they're o.k..
:::::Job
:::::
:::::
:::::
:::::
::::::Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
::::::____________________
::::::
:::::::Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
:::::::
:::::::Job
::::::
::
::Job,
::
::Make sure you have the replacement capacitors polarity right. If they are individual caps verify that the shell of the cap (covered with plastic/vinyl) is the minus/negative lead and the end that has an insulator with the wire/lead feeding thru is the plus/positive lead.
::
::Radiodoc
::**********

7/24/2009 8:57:48 PMJorge Serpa
nd in a 1951 supplement to versions because there was a change in the schematics. I would be happy to forward them if you would like them.

Forgot to add that I have the actual schematic It can be fou
:Hello,
:
:I have this radio too and I was hoping you might be able to help with a couple of things. I was wondering if you have the original knobs on yours and could provide a picture. My radio is now working but I have a temporary antenna because the back cover of my radio was missing. A picture of the inside of the cover and the back and any details that could help me fabricate a replica cover and antenna would really help me out.
:
::Gees, I feel so embarressed..I did have a capacitor reveresed. The thing is I was so adamant that I had them installed correct. It was an axial cap and I thought the black, rubberish end was negative.....sorry guys and thanks for your help.
::Job
::
::
::::Warson: Thanks for pointing out my error, in selecting a schematic, but the radio in question G.E., model no. C452A only has two electrolytic caps, not three. I'll select schematic L650 which only has two electro caps but I still can't figure out how I lost my B plus voltage when I installed new electrolytic caps....oh well, the trials associated with this wonderful hobby.
::::Regards.....Job
:::::Job: The parts list shows the cap you subbed out as "three in one" with two 50uF @ 150v and a single 40uF @ 25v. Have you replaced the 40uF too? Watson
:::::
:::::
:::::
::::::Sorry.....Made a mistake on that schematic number. It's G.E. 321A. Watson, I did check the new caps and they're o.k..
::::::Job
::::::
::::::
::::::
::::::
:::::::Job: I can't seem to locate your schematic to be more specific but I'll make a suggestion. Don't assume your "new" caps are good - test them. One may be shorted or open. Occasionally bad new ones slip through quality control or possibly turn bad sitting on the shelf. Watson
:::::::____________________
:::::::
::::::::Thanks for the assistance in finding a schematic. I am using GE C452A. Now for a problem which I don't understand. The radio is receiving stations but sounded rough so I replaced the two 50uf electrolytic capacitors...seemed to be quite simple..joind the two negative ends and connected to the black negative. Then I connected the positive of each cap to the two individal red wires...The former "two in one" cap was removed from the chassis....I lost the "B PLUS"...WHY???? It seemed a simple replacement but where did I go wrong??? I replaced the old capacitors and the radio worked as previously....I need your help again guys.
::::::::
::::::::Job
:::::::
:::
:::Job,
:::
:::Make sure you have the replacement capacitors polarity right. If they are individual caps verify that the shell of the cap (covered with plastic/vinyl) is the minus/negative lead and the end that has an insulator with the wire/lead feeding thru is the plus/positive lead.
:::
:::Radiodoc
:::**********



© 1989-2025, Nostalgia Air