6D22S conversion for KAT6550

[John Caswell]

Hi Andy
Absolutely no reason at all except GZ34 are expensive because the audiophools have given some of them magical properties.
Mullard usually quote a minimum anode resistance, so measure one half of the tx then add a series R from tx to the GZ34 anodes to make up this minimum. It also helps to even out the current to each anode. I use 25 Watt metalclad resistors bolted to the chassis in my amps for exactly this purpose, except I use 6D22s or EY84 as the rectifiers.

John