PSU Transformers for 6922 SRPP tube preamp

I've used these in the past, mostly for prototyping. Does the job and not too pricey.

Valve Transformer VT342

Why 8.5V heaters? 6922 is a 6.3V heater unless you're planning on DC heater supply.

Thanks for the link, is the voltage used by Audionote....

[IMGDEAD]http://a.imageshack.us/img517/8268/srpptubes6922analogdac2.jpg[/IMGDEAD]