Questions about tubes and gear that glows. FAQ
In Reply to: GZ37 modern replacement posted by Johno on June 9, 2020 at 22:15:52:
A lot of GZ37s were pressed into service as "substitutes" for the GZ34/5AR4. Check with AA sponsor Jim McShane for truly satisfactory current production 5AR4s. It took longer than we would like, but New Sensor has finally gotten 5AR4 construction squared away.
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Topic - GZ37 modern replacement - Johno 22:15:52 06/09/20 (3)