Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: gregr on December 27, 2017, 09:05:21 AM

Title: Crack B+ Voltage
Post by: gregr on December 27, 2017, 09:05:21 AM

Hi all,
I am assembling my crack, it's not quite finished. Before connecting the B+ to the amp, I thought I'd check it first to be sure it's wired correctly. It seems to be but I get 235 VDC at the output (across the 270k resistor), I expected 170 VDC.
The transformer secondaries before wiring measured 155VAC.
Am I good to go? Will the 235 VDC draw down to 170 VDC with the tube load? Thanks.

Title: Re: Crack B+ Voltage
Post by: fullheadofnothing on December 27, 2017, 10:35:27 AM

What is the first instruction on the voltage check page?

What is the second instruction on the voltage check page?

Instructions are provided to give desired results...