mopardave Posted May 9, 2022 Share Posted May 9, 2022 I have a bad jan 12sc7 tube in my new MapleTree pre amp. Are these tubes generally a good tube or is there a better replacement? Quote Link to comment Share on other sites More sharing options...
Curious_George Posted May 10, 2022 Share Posted May 10, 2022 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. Quote Link to comment Share on other sites More sharing options...
John Warren Posted May 10, 2022 Share Posted May 10, 2022 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. Quote Link to comment Share on other sites More sharing options...
mopardave Posted May 11, 2022 Author Share Posted May 11, 2022 Ok, i see what i can find in the SL tube. Any brand ok? Quote Link to comment Share on other sites More sharing options...
Curious_George Posted May 11, 2022 Share Posted May 11, 2022 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. Quote Link to comment Share on other sites More sharing options...
mopardave Posted May 12, 2022 Author Share Posted May 12, 2022 Tung-Sol JAN-12SL7GT VT-289 Black Glass Round Plate Tubes NOS. These any good? Quote Link to comment Share on other sites More sharing options...
Curious_George Posted May 12, 2022 Share Posted May 12, 2022 Should be. Quote Link to comment Share on other sites More sharing options...
mopardave Posted May 29, 2022 Author Share Posted May 29, 2022 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. Quote Link to comment Share on other sites More sharing options...
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