[Amps] SCR to adjust 240v to 200v

[Jim Brown]

No surprise. About 40 years ago, I had a job maintaining and 
troubleshooting a wide range of installed systems -- audio, video, 
security, etc. One was a simple intercom in an apartment complex that 
used SCRs for something -- don't even remember what -- but they had a 
very low voltage rating, and were always failing from voltage induced on 
system wiring. Ten Tec made a similar error with too-low voltage ratings 
on the discrete semiconductors used in the keying logic of their 
otherwise very nice Titan 425 amp.  In both cases, there were higher 
voltage rated parts in the same series, but I've got a feeling that, as 
so often happens, the bean counters subbed the lower voltage parts to 
save pennies.

73, Jim K9YC

On Mon,8/15/2016 9:12 AM, Michael Clarson wrote:
> Lightning was always taking out some of the semiconductors. I'm going 
> to try to find a manual and see exactly how they did it. -