From: Abqcooks{at}aol.com
Subject: [drakelist] filament voltage ?



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Well, I apologize for this question not being specific
to Drake gear but this is where the tube gurus are 
to be found !
I recently picked up an old  TS-830s at a swapfest.
While cleaning all the wafer switches I decided to measure
voltages on the finals ... a pair of 6146.  I found the filament
voltage to be at 6.4vac and thought I would knock it down
a little with a .5 ohm resistor.  The filament voltage is now
at 6.0 volts and I notice no drop in plate current on any freq.
I am thinking this might prolong the life of the tubes...???
But I wonder if there is some reason why this should not
be done.  Am I perhaps messing with something that for
some reason should be left alone ??  Any thoughts welcome.
                                     tnx   jim   N5KY

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Well, I=
 apologize for this question not being specific
to Drake gear but this is where the tube gurus are 
to be found !
I recently picked up an old  TS-830s at a swapfest.
While cleaning all the wafer switches I decided to measure
voltages on the finals ... a pair of 6146.  I found the filament
voltage to be at 6.4vac and thought I would knock it down
a little with a .5 ohm resistor.  The filament voltage is now
at 6.0 volts and I notice no drop in plate current on any freq.
I am thinking this might prolong the life of the tubes...???
But I wonder if there is some reason why this should not
be done.  Am I perhaps messing with something that for
some reason should be left alone ??  Any thoughts welcome.
            &nbs=
p;            &n=
bsp;          
tnx &n=
bsp; jim   N5KY

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