Re: [TCML] overheating diode strings

[David Speck <Dave@xxxxxxxxxxxxxxxx>]

Jim,

Can you post a schematic of what you have built somewhere? Something is 
wrong if it is overheating like that.
Dave

On 8/28/2014 7:00 PM, jj@xxxxxxxxxxxxx wrote:
> Hello Everyone,
> I constructed eight strings of 50, 1000V, 10 A diodes. I assembled and 
> tested four strings without equalizing capacitors and resistors and 
> four strings with equalizing capacitors and resistors.The diodes came 
> off eBay from a company in China. All diodes checked OK on my diode 
> tester. These strings were then soldered into two full wave bridge 
> rectifiers powered by a variac. My scope shows a 60Hz output on both 
> which should be 120 hz output. The negative output string that 
> connects to the wiper of the variac becomes too hot too touch at less 
> than 5 volts output on both units. One of these when working properly 
> will be supplied by an 8 Mot stack.
> All help will be greatly appreciated.
> Thanks, Jim
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