[Amps] SCR to adjust 240v to 200v

[Ron Youvan]

   On 08/12/2016 01:07 PM, Jim Durham wrote:

/* snip */
> 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.

   I would measure the incoming line Voltage RMS then I would locate a
used 240 Volt to (normal Voltage - 200) Volt transformer and buck the:
240 - 200 = 40 Volts at enough Amps with it.
   SCRs are headaches just waiting for you.

> 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?
-- 
   Ron  KA4INM - Youvan's corollary:
                 Every action results in unwanted side effects.