Can you tell me the difference between these tubes. Each one seems to work in the same radio?
I don't have a tube book, any suggestions on a good book?
Mitch
Viz . . . . |
:All,
:Can you tell me the difference between these tubes. Each one seems to work in the same radio?
:I don't have a tube book, any suggestions on a good book?
:Mitch
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: : :  : : : : : : : :Sir Mitch. . . . . . : : :Referencing to the little brother in its filamant rating. : : :The straight 6SQ7 would be made as a metal housed unit. : : :The 6SQ7 GT would be the exposed glass housing. : : :Particulatly of interest in the metal tube, if being an RF-IF tube with the shielding being provided, but also, even a bit of consideration, on that 6SQ7 audio pre amp tube. : : :"GOGGLE" up " tube manuals online " to get the full specs on any other particular tubes. : : : :Viz . . . . : : : : :  : : : : :73's de Edd : : :  : |
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::All,
::Can you tell me the difference between these tubes. Each one seems to work in the same radio?
::I don't have a tube book, any suggestions on a good book?
::Mitch
::
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::
:
Hey Mitch-
I picked up two really good copies of the RCA tube manual on eBay for a couple of bucks. Yeah, you can download stuff, but I like having something I can pick up and hold in my hand.
Another answer to you're question-
You can ALWAYS replace the 12SQ7GT, (glass) with the metal. But if you replace the metal with the glass you MIGHT sometimes have problems. Especially if the shielding is needed because of some circuit design. I've never had a problem though.
Terry
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:: :: :: I am learning folks, i like the manual in my hands also as i need to see what i am doing on a step by step basis. :: |
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:::All,
:::Can you tell me the difference between these tubes. Each one seems to work in the same radio?
:::I don't have a tube book, any suggestions on a good book?
:::Mitch
:::
:::
:::
::
:Hey Mitch-
:I picked up two really good copies of the RCA tube manual on eBay for a couple of bucks. Yeah, you can download stuff, but I like having something I can pick up and hold in my hand.
:Another answer to you're question-
:You can ALWAYS replace the 12SQ7GT, (glass) with the metal. But if you replace the metal with the glass you MIGHT sometimes have problems. Especially if the shielding is needed because of some circuit design. I've never had a problem though.
:Terry
:
When replacing a glass tube with metal be sure pin #1 is grounded at the socket. If not the metal shield floates, causes hum and/or unwanted oscillation.
If a glass tube is used in place of metal may need to add a shield.
Norm
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:I am learning folks, i like the manual in my hands also as i need to see what i am doing on a step by step basis.
:Thank you both,
:Mitch
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:::Sir Mitch. . . . . .
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:::Referencing to the little brother in its filamant rating.
:::
:::
:::The straight 6SQ7 would be made as a metal housed unit.
:::
:::
:::The 6SQ7 GT would be the exposed glass housing.
:::
:::
:::Particulatly of interest in the metal tube, if being an RF-IF tube with the shielding being provided, but also, even a bit of consideration, on that 6SQ7 audio pre amp tube.
:::
:::
:::"GOGGLE" up " tube manuals online " to get the full specs on any other particular tubes.
:::
:::
:::
:::Viz . . . .
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:::73's de Edd
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::::All,
::::Can you tell me the difference between these tubes. Each one seems to work in the same radio?
::::I don't have a tube book, any suggestions on a good book?
::::Mitch
::::
::::
::::
:::
::Hey Mitch-
::I picked up two really good copies of the RCA tube manual on eBay for a couple of bucks. Yeah, you can download stuff, but I like having something I can pick up and hold in my hand.
::Another answer to you're question-
::You can ALWAYS replace the 12SQ7GT, (glass) with the metal. But if you replace the metal with the glass you MIGHT sometimes have problems. Especially if the shielding is needed because of some circuit design. I've never had a problem though.
::Terry
::
:
:
: When replacing a glass tube with metal be sure pin #1 is grounded at the socket. If not the metal shield floates, causes hum and/or unwanted oscillation.
:
: If a glass tube is used in place of metal may need to add a shield.
:
:Norm
:
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:::: :::: :::: :: ::I am learning folks, i like the manual in my hands also as i need to see what i am doing on a step by step basis. ::Thank you both, ::Mitch :::: :::: :::: :::: :::: :::: :::: ::::Sir Mitch. . . . . . :::: :::: ::::Referencing to the little brother in its filamant rating. :::: :::: ::::The straight 6SQ7 would be made as a metal housed unit. :::: :::: ::::The 6SQ7 GT would be the exposed glass housing. :::: :::: ::::Particulatly of interest in the metal tube, if being an RF-IF tube with the shielding being provided, but also, even a bit of consideration, on that 6SQ7 audio pre amp tube. :::: :::: ::::"GOGGLE" up " tube manuals online " to get the full specs on any other particular tubes. :::: :::: :::: ::::Viz . . . . :::: :::: :::: :::: :::: :::: :::: :::: :::: ::::73's de Edd :::: :::: :::: :::: |
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:::::All,
:::::Can you tell me the difference between these tubes. Each one seems to work in the same radio?
:::::I don't have a tube book, any suggestions on a good book?
:::::Mitch
:::::
:::::
:::::
::::
:::Hey Mitch-
:::I picked up two really good copies of the RCA tube manual on eBay for a couple of bucks. Yeah, you can download stuff, but I like having something I can pick up and hold in my hand.
:::Another answer to you're question-
:::You can ALWAYS replace the 12SQ7GT, (glass) with the metal. But if you replace the metal with the glass you MIGHT sometimes have problems. Especially if the shielding is needed because of some circuit design. I've never had a problem though.
:::Terry
:::
::
:
How interesting about the tubes. Recapped a radio and changed the tubes because i had them. Nothing wrong with the original tubes, EXCEPT!!!!!! GT vs Metal. Radio picked up a constant low hum. Changed the metal tube back to GT and hum is now in someone elses radio.
I will be much more careful about these things and hope i grow some hair back.
Mitch