About 300B SE heater w/t Coleman regulator

[erikovsky]

Hi guys:

Just started building a 300B SE, the original design connect +5VDC to one filament, and the other to ground.

I want to implement a Coleman regulator, apparently I can't connect one filament to GND, which shorts the CCS part of the regulator.

Can I just connect F+/F- to both sides of filament without grounding? or any filament resistor needed?

Cheers

 

[euro21]

As you can see, the raw supply is ground independent.