[Amps] Shunt resistors for a bridge made of 6A10 diodes in Alpha 91b

[Val]

Steve,

I do not think that shunt resistors are necessary at all. But it would 
be better if you reduce the diodes number by using higher voltage 
ones.

73, Val LZ1VB



> G’day
>
> I am refurbishing the power supply board in my Alpha 91b and am 
> going to replace the KD202P diodes which make up the bridge with 
> 6A10 diodes (1000V 6A and only A$1.95 each).
>
> The original bridge had strings of five KD202P a side, with shunt 
> resistors across each diode of 500K 1W. The stud mounted diodes are 
> looking pretty burnt around the retaining washers/bolts, so it is 
> definitely time (and I have a strange earth leakage fault).
>
> Please, I’d really appreciate some advice about what value of shunt 
> resistor to use on each of the twenty 6A10 that will make up the 
> bridge?
>
> PS The replacement encapsulated bridge rectifier sold by Alpha/RKR 
> designs (5kV, 2A) is US$150, so this the reason for looking for a 
> cheaper solution.
>
> Vy 73
>
> Steve, VK6VZ
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>