Sparton AC-7 tube base diagrams
7/22/2008 7:00:03 PMDick--W8TBK(64265:0)
I am working on a Sparton Model AC-7 from the early 20's. Tubes are C-181, Kellogg-401, and Raytheon type BH.
The type BH appears to be a mercury vapor rectifier. It has a standard 4 pin base.
The type BH appears to be a mercury vapor rectifier. It has a standard 4 pin base.
The schematic is fuzzy, but it appears the other tubes have indirectly heated cathodes.
Heater pins are on the top of the Kellogg tube. It too has a standard four pin base.
The Cardon tube has the filament pins near the top of the bakelite base. It too has a standard four pin base.Other similar Cardon tubes are C-401 and AC373
Can anyone help?
7/22/2008 7:55:39 PMEdd(64267:64265)
If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
Here is a bit more on the electrical specs:
73's de Edd
7/23/2008 12:48:46 PMDick-W8TBK(64295:64267)
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:Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
I can email pictures if that would help.
Thanks again, EDD
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:If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
:
:
:Here is a bit more on the electrical specs:
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:73's de Edd
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:Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
I can email pictures if that would help.
Thanks again, EDD
:
:
:If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
:
:
:Here is a bit more on the electrical specs:
:
:
:
:
:
:
:
:
:
:
:
:73's de Edd
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7/23/2008 12:56:18 PMDick-W8TBK(64296:64295)
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::Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
:I can email pictures if that would help.
:Thanks again, EDD
::
::
::If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
::
::
::Here is a bit more on the electrical specs:
::
::
::
::
::
::
::
::
::
::
::
::73's de Edd
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::OOPS, Forgot to ask for your email address.
Dick
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::
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::Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
:I can email pictures if that would help.
:Thanks again, EDD
::
::
::If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
::
::
::Here is a bit more on the electrical specs:
::
::
::
::
::
::
::
::
::
::
::
::73's de Edd
::
::
::
::OOPS, Forgot to ask for your email address.
Dick
7/23/2008 11:11:05 PMFred R(64309:64296)
I used to own one of these about ten years back. Mine had all its original Cardon tubes in the radio chassis and the Raytheon BH. The voltages on the tube info Edd gave you are correct but the basing is a little different. The filament pins, the fat ones have no connection on them. The grid and plates are as shown. One nice thing Sparton did when they wired this set is to put 5 volt AC on the filament pins on the 181 output tube sockets. If the 181s were not available, a pair of Sparton 182Bs or regular 71As will work there also. The set will require the rest of the tubes with the filament pins on the side. Sparton originlly used this chassis in a battery set and the new style tubes allowed them to use them up in newer AC sets. Is yours the table model or floor model? I forget which model number is which now. Mine was a floor model with a built in speaker. It had some minor pot metal problems in the speaker that were easy to fix.
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:::73's de Edd
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:::
:::OOPS, Forgot to ask for your email address.
:Dick
Fred R
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:::Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
::I can email pictures if that would help.
::Thanks again, EDD
:::
:::
:::If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
:::
:::
:::Here is a bit more on the electrical specs:
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
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:::73's de Edd
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:::
:::
:::OOPS, Forgot to ask for your email address.
:Dick
7/24/2008 3:26:06 PMdick-W8TBK(64323:64309)
:I used to own one of these about ten years back. Mine had all its original Cardon tubes in the radio chassis and the Raytheon BH. The voltages on the tube info Edd gave you are correct but the basing is a little different. The filament pins, the fat ones have no connection on them. The grid and plates are as shown. One nice thing Sparton did when they wired this set is to put 5 volt AC on the filament pins on the 181 output tube sockets. If the 181s were not available, a pair of Sparton 182Bs or regular 71As will work there also. The set will require the rest of the tubes with the filament pins on the side. Sparton originlly used this chassis in a battery set and the new style tubes allowed them to use them up in newer AC sets. Is yours the table model or floor model? I forget which model number is which now. Mine was a floor model with a built in speaker. It had some minor pot metal problems in the speaker that were easy to fix.
:
:Fred R
:
::::
::::
::::
::::
::::
::::
::::
::::Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
:::I can email pictures if that would help.
:::Thanks again, EDD
::::
::::
::::If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
::::
::::
::::Here is a bit more on the electrical specs:
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::73's de Edd
::::
::::
::::
::::OOPS, Forgot to ask for your email address.
::Dick
:
:Fred R
:
::::
::::
::::
::::
::::
::::
::::
::::Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
:::I can email pictures if that would help.
:::Thanks again, EDD
::::
::::
::::If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
::::
::::
::::Here is a bit more on the electrical specs:
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::73's de Edd
::::
::::
::::
::::OOPS, Forgot to ask for your email address.
::Dick
7/24/2008 3:27:17 PMDick-W8TBK(64324:64323)
::I used to own one of these about ten years back. Mine had all its original Cardon tubes in the radio chassis and the Raytheon BH. The voltages on the tube info Edd gave you are correct but the basing is a little different. The filament pins, the fat ones have no connection on them. The grid and plates are as shown. One nice thing Sparton did when they wired this set is to put 5 volt AC on the filament pins on the 181 output tube sockets. If the 181s were not available, a pair of Sparton 182Bs or regular 71As will work there also. The set will require the rest of the tubes with the filament pins on the side. Sparton originlly used this chassis in a battery set and the new style tubes allowed them to use them up in newer AC sets. Is yours the table model or floor model? I forget which model number is which now. Mine was a floor model with a built in speaker. It had some minor pot metal problems in the speaker that were easy to fix.
::
::Fred R
::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
::::I can email pictures if that would help.
::::Thanks again, EDD
:::::
:::::
:::::If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
:::::
:::::
:::::Here is a bit more on the electrical specs:
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::73's de Edd
:::::
:::::
:::::
:::::OOPS, Forgot to ask for your email address.
:::Dick
::
::Fred R
::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::Thanks for the info, EDD. My 401's have filament connections on the top of the glass envelope and the 181's have the filament connections on the side of the bakelite base. The rectifier appears as your diagram.
::::I can email pictures if that would help.
::::Thanks again, EDD
:::::
:::::
:::::If you were needing a bit more info than only the pin outs, such as can be referenced at this site.
:::::
:::::
:::::Here is a bit more on the electrical specs:
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::73's de Edd
:::::
:::::
:::::
:::::OOPS, Forgot to ask for your email address.
:::Dick
7/24/2008 3:38:45 PMDick-W8TBK(64325:64324)
Forgive me fellows for all the repeats. I'm an old codger and a slow learner.
Now, what I have learned is that these tubes were AC replacements for battery types.
The heater pins are on top of the tubes with the cathode, grid and plate on the bottom.
If you are interested go here for McCullough/Kellogg:
Now, what I have learned is that these tubes were AC replacements for battery types.
The heater pins are on top of the tubes with the cathode, grid and plate on the bottom.
If you are interested go here for McCullough/Kellogg:
http://uv201.com/Tube_Pages/mccullough.htm
For Sparton/Cardon go here:
http://www.bill01a.com/tubephotos/sparton.htm
The set I have is a console, model AC-7
Thanks to all for the time and trouble you spent trying to get me on the right track.