[NJARC] Pilot lamp 'flash'

Jim Whartenby antqradio at sbcglobal.net
Mon Jan 7 16:23:46 EST 2008


Steve
Two zener diodes, 5.6 volt 1 watt in series opposing across the lamps,
assuming the lamps are in parallel.  If the lamps are in series use 12
volt 1 watt zeners.
Regards,
Jim
--- sgt88 at verizon.net wrote:

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> _______________________________________________
> Hi all:
> 
> Got this radio...two pilot lamps have their voltage taken off the
> 'heater resistor' that is in the series tube filament circuit.
> 
> The problem is...the high voltage surge when I first put the radio on
> causes the pilot lamps to 'flash' bright...then they go toooo dim to
> be functional.
> 
> I increased the lamp voltage on the wire wound slide-tap on the
> heater resistor...only to blow out the pilot lamps from the surge in
> the attempt get them brighter so I can read the dial...
> 
> Circuit calls for 6.3v lamps...using what I 'think' are 6.3...
> 
> Any suggestions?
> 
> Thanks,
> Steve
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