Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: mravunko on March 30, 2021, 01:10:00 AM

Title: Using toroidal transformer
Post by: mravunko on March 30, 2021, 01:10:00 AM

Hi,

I would like to make an toroidal transformer for my Crack. I calculated about 3A for the valve heaters. Do you think that 0,2A will be enough for the 175V high voltage?

Thanks  ::)

Title: Re: Using toroidal transformer
Post by: johnsonad on March 30, 2021, 01:44:52 AM

Why would you do this? What are you trying to gain?

Title: Re: Using toroidal transformer
Post by: mravunko on March 30, 2021, 01:56:35 AM

Some people change the capacitors... I have a friend that makes torodial transformers at home and I think he can make it fit in my chassis so I think to give it a try.
Maybe it will become better, maybe not. Who knows, not me :)

Title: Re: Using toroidal transformer
Post by: johnsonad on March 30, 2021, 02:15:38 AM

This would be the one item I would not change it the Crack.  Just my two cents.

Title: Re: Using toroidal transformer
Post by: Paul Joppa on March 30, 2021, 04:11:03 AM

The stock PT-10 high-voltage winding is rated 250mA-RMS, but Crack uses about half of that. Should be fine. Stock DC resistance is 35-40 ohms.