[R-390] R-390A Alternatives for regulator 3TF7 - 12BH7, 12BY7, etc

Larry H dinlarh at att.net
Fri Apr 8 00:34:48 EDT 2016

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If you have the 2 wire change on the regulator socket, these can be plugged in and work well: 12BH7, 12BY7, 12CT8, 12DQ7, and 12FX8.  
Regards, Larry

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