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jan 12sc7 metal tube


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The 12SC7 is a 12SL7GT with a "special shield" to reduce hum according to tube data documentation. A 12SL7GT could be used as a direct repalcement. I've never needed a special shield when using 12 or 6SL7GT's in an audio circuit. 

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1 hour ago, Curious_George said:

The 12SC7 is a 12SL7GT with a "special shield" to reduce hum according to tube data documentation. A 12SL7GT could be used as a direct repalcement. I've never needed a special shield when using 12 or 6SL7GT's in an audio circuit. 

GT=glass tube.

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33 minutes ago, mopardave said:

Ok, i see what i can find in the SL tube.   Any brand ok?

They were only made by three or four companies, all the rest are / were rebranded. GE, RCA, Sylvania, etc will be good.

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  • 3 weeks later...
On 5/12/2022 at 7:42 AM, Curious_George said:

Should be. 

Just tried the tung sol JAN 12SL7GT.  Dont like them. I have to twist the volume up quite a bit to hear music.   JAN 12SL7 sound pretty good, these are a metal can style.  I just need to find a real good pair.

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