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[AMPS] 4CX800 Filament Voltage ?

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Subject: [AMPS] 4CX800 Filament Voltage ?
From: Douglas.R.Snowden@noaa.gov (Douglas R Snowden)
Date: Thu, 16 Aug 2001 09:47:43 -0400
I am just about finsihed with my Dentron MLA2500 conversion to
a 4CX800.  I notice that with the tube plugged in I am putting
about 13.1 volts on the filament from a transformer I have bolted
to the rear of the amplifier.  I know I have seen that tubes like
the 3-500 can get extended life by lowering the 5.1v filament
voltage to something slightly lower.  Does this also apply to the
4CX800 and similar tubes?  I think the specs on the 4CX800
are 12.6v +- .7 volts.

Doug N4IJ




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