[Amps] SCR to adjust 240v to 200v

[Jim Durham]

Hello all,

This is my first posting, so Howdy..

I have a Henry 2k-2 (modified to take 3-500Zs).  After I bought it, some 
years back, I fired it up and tube filaments were very bright and HV was 
high.

Talked to Henry. They asked me the plate transformer number, which they 
looked up and said "Oh, that's the 200v European transformer". So, I put 
a hefty variac on the 240v AC incoming and all is fine, except I'd like 
to ditch the variac and was wondering about if anyone on here had any 
wise words about using an SCR instead to back the AC voltage off.

My experience with big SCRs (TV studio lighting) was that they tend to  
put out a lot of RF hash.  I also wonder about how the choke and filter 
cap in the power supply would like non-sinusoidal AC waveform?

Anyone have any experience with this?

Thanks and 73,

Jim, W2XO