Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: turtle441 on August 19, 2020, 07:46:13 am

Title: Help Understanding Current for Chokes
Post by: turtle441 on August 19, 2020, 07:46:13 am

Howdy all, need some help understanding some theory so that I can properly source parts for an upcoming build.  I'm looking at doing  a Marshall-based (really Friedman-based) 2x6V6 push-pull build with 3 12AX7's.  Final schematic is still to be finalized, but I've included a clip of Hoffman's 6V6 plexi to help facilitate discussion.  Using some online calculators, total current requirement for the HT should be somewhere in the vicinity of 80-ish mA's.  I'm trying to think through the required choke size.  Looking at other 2x6V6 builds online, many (including Hoffman's 6V6 plexi) have used smaller 50mA-rated chokes.  Is this because the power going to the plates (via the OT) comes off prior to the choke? 

Title: Re: Help Understanding Current for Chokes
Post by: sluckey on August 19, 2020, 08:03:39 am

yes

Title: Re: Help Understanding Current for Chokes
Post by: Williamblake on August 19, 2020, 10:41:56 am

The current a choke will take happily depends on the diameter of it's winding. As was said already.