WAD 300B PP Rebuild Advice Needed.

[Richard]

Hi Zak,

Very nice!

A couple of points/questions,
my 2mV hum was simply measured with a multimeter at the speakers with the amp idling in system. The meter is quite decent and quotes 45Hz - 500Hz response for ACV so it will be a broadband of all the "hum" noises. The humbuckers were set in system by ear but fine tuned with the meter.

Did you phase the 300B heaters?

Did you settle on DC heating for either/both of the small valves or are they AC? NealG had already done mine and I can't remember but think it would have been both valves linked as per the build sheets. Neal or Greg may be able to comment on the difference in hum with DC heating.