Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Tom-s on March 20, 2021, 06:21:07 AM

Title: Power transformer Crack specs
Post by: Tom-s on March 20, 2021, 06:21:07 AM

For a new Crack project, I'm interested in the HV headroom on the power transformer.
This as I'd like to build a normal Crack with a low dropout HV regulator instead of the classic choke setup.
Could i take 10-20mA extra?

Title: Re: Power transformer Crack specs
Post by: Paul Birkeland on March 20, 2021, 06:39:45 AM

There's a pretty hefty amount of HV headroom on the Crack PT.  For a HV regulated Crack, we do have the Crack-a-two-a.  Over the years we have developed a substantial preference for the sound of shunt regulated circuits rather than series regulated circuits, but you'd want to run a lot of regulator current in a shunt regulated Crack, so for that we went with the much larger power transformer and larger chassis.

Title: Re: Power transformer Crack specs
Post by: Tom-s on March 21, 2021, 08:59:59 AM

Thanks for that PB. I'd like to experiment some with the HV on my next Crack; i'd like to keep things small this time.
A Crack a two wouldn't fit the desk as good as a Crack does. I prefer the small package.
My previous used a Triad C7X for each 270R in the powersupply and it grew out of it's original case.
I'll try a cap multiplier circuit first; see how that sounds when compared to stock.