F4 power amplifier

^ Yep, I'm very curious. My BA3B is made to drive the balanced F4. I suppose I could drive it SE to a single ended F4 but I haven't bothered.

Also, as my tube preamps have lots of swing on their SE output, I haven't built the YICDAF4 kit yet. I got the boards/parts sitting right my keyboard... I can see them right now. So, I need to get the rest of the parts and build them into a box...
 
... I can say that the "Yes It Can Drive An F4" boards do kick some serious butt as an F4 front end. I'm very impressed!!!

It's the inductor (thank you, Richard Burwen and Deane Jensen) and the amazing PN4250A transistor (thank you Deane Jensen). Citation
 

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