Chris Hornbeck wrote:

On Mon, 12 Jun 2006 23:08:01 +0100, "Mike Gilmour"
wrote:

http://www.one-electron.com/Fourier/FC_SPmk3.pdf

Note that the B+ supply is choke-input from 340 VAC
using capacitors rated at 360 VDC. Exceptionally bad
idea without time delay.

A 400V cap will help there.

Graham