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

[Colin Lamb]

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