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Old 8th August 2004, 04:07 AM   #1
diyAudio Member
Join Date: Aug 2004
Location: Indiana
Default Just acqired some strange tubes.........

I recently acqired some NOS Sylvania 1222a tubes (10 to be exact.) I've been told that these are military/industrial grade 6l6gc's w/21 watt plate dissipation instead of the gc's 19 watts. The pinout is different as well. Has anybody had any experience with these?? I'm thinking about modding my Bandmaster Blackface to utilize them. What do you guys think??
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Old 8th August 2004, 02:29 PM   #2
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Join Date: Jul 2004
Location: middle-o-nowhere Saskatchewan
Unhappy 1222a

They are more like 6L6GA's. I don't think they would like being run as GC's.
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Old 8th August 2004, 07:39 PM   #3
Colt45 is offline Colt45  Serbia
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Join Date: Feb 2002
Location: Canada
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6L6G/A/B/metal is 19w/2.5w

your tubes are 21w

6L6GC is 30w/5w

so.. they cant really be used as a 6L6GC. well, they can, if you like red-plate and toaster grid
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