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p/w purbeck scope

Discussion in 'Troubleshooting and Repair' started by lectron, Feb 11, 2014.

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  1. lectron


    Feb 11, 2014
    hi, I,m building the 78 p/w Purbeck scope, ive built all boards and got past the psu stage,
    built x and y boards, all voltages correct. now when I plug in the y board I lose the voltage,
    I have a -17v -12v -6v +6v +12v and a 150v, all voltages are present and correct except the -6 and -12 v they drop down to about 1.3 to 3volts and the 150v for the y plates drop to 8-10volts, I have checked the wireing and tried whatever I could, I,m waiting for parts to come for me to build a psu so as I can test the board without the danger of the 1k hv.
    any help would be a big help and appreciated. ian
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