[Amps] 3-500Z heater voltage reduction

[MIKE DURKIN]

Wow, thought this thread died a few months ago .... so this is what i did.

I used 8 10W .33Ohm non-inductive resistors (it was what i could find for cheap)  2 X 4 paralleled ..... for a total of 0.165Ohm. Reduced my AC voltage just under 10Vac. My meter shown 4.95Vac at the pins and called it good.

Mike
KC7NOA

> Carl:
> 
> How about some NICHROME wire ???
> 
> Might just work !!!
> 
> OK, Just kidding.
> 
> Old joke on the list for "Cure All's" for what ailing  amplifiers !!!
> 73
> Bob, K1VU
> FN42ma
> 
> At 05:33 PM 9/15/2009, Carl wrote:
> >Just coil up some #10 magnet wire and put in series with the xfmr end of the 
> >filament choke, it wont take much. #12 will get pretty warm and can be used 
> >if there is air flow. You dont want to use copper wire that the temperate 
> >keeps going up.
> >
> >Carl
> >KM1H
> >
> >
> >
> >----- Original Message ----- 
> >From: "MIKE DURKIN" <patriot121 at msn.com>
> >To: "amps fourm" <amps at contesting.com>
> >Sent: Tuesday, September 15, 2009 3:03 PM
> >Subject: [Amps] 3-500Z heater voltage reduction
> >
> >
> >>
> >> Ok.. yea i did search some on reducing the voltage at the heaters on 
> >> google ... yikes alot of what in not really looking for.So a quick 
> >> question .. what is the favored way to reduce the voltage ?? i have 12V ac 
> >> across 2 at 3-500z's and i want to drop it by -- say 1 volt.
> >> Trying to keep to the confines of what i have around .. some 12 and 10Ga 
> >> solid magnet wire, some romex (120v stuff) and some 12ga hookup wire witch 
> >> i dont think the insulation is rated for heat at all ....
> >> Or some other common junk drawer stuff that would do the trick ... the 
> >> last thing i tried was a .27Ohm 10W cement resistor and that was too high 
> >> of a resistance ( was a bit surprised but oh well i dont know the internal 
> >> resistance if the filaments anyways)
> >> KC7NOA ... i think i even have some nichrome sitting round some where.....
> >>
> >>
> >>
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