[Amps] FW: 3-500Z heater voltage reduction

[MIKE DURKIN]

Update - kinda - If any one dosent know im modding a Yokagawa GE medical amp into ham service ... I added 800V of capacitance to the HV instead of using dropping resistors (still dont know the actual HV is yet but ill get to it)
I let it go at 5.9V per tube and was doing some testing .... I was getting 900W on 14.300 when it started to ark over .... reduced power and still doing it... shut er down at that moment ...
I thought i had blown a relay ... but

I had actually killed my FAVORITE dummy load ... weighed over 3Lbs of aluminum with a "N" connector on it. Now the thing measures 150K !!!! ( INSERT SWEAR WORD HERE )   he he and a hi hi !!!
Guess the amp is working .. still need to find some 500Pf at 2-5KV disks for the loading for other bands ... 
KC7NOA

> I like to put a resistor in the primary of a filament transformer, because it is easier to find a standard value.  However, that is not possible if the transformer also contains other secondaries.
> 
> But, either in the primary or secondary, resistance is good because it limits "cold" current automatically.
> 
> Kevin has a good idea about using the "white" wire.  Although teflon was standard in the aircraft industry for years, it had problems, because it flows.  Today, teflon insulation has been replace by tefzel, which is also white - and does not flow.
> 
> Aircraft repair shops always have #20 and #22 tefzel wire for sale.  
> 
> 73,  Colin  K7FM

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