Both tubes need 5V filament voltage but th 3-500Z wants more current
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Val Erwin
A good example of the change you would like to achieve is available by
viewing the Ameritron series of amps. Specifically, compare the AL-82 (2 X
3-500s) to the AL-1500 (single 8877).(You can download the manuals)
Both amps use the same power suppply and the same chassis. Despite owning an
AL-1500, I have never explored what they do about the difference in filament
voltages between the two models.
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