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Re: Fixing a vintage Tek 465M scope: Bad HV multiplier


 

On Sun, Jan 12, 2025 at 04:18 PM, richard ramacieri wrote:


Hi.. I have a 465m with HV section blowing the fuse... Found that the 32v
unreg source voltage to be 56 volts !! ..A look at the diagram show the
transfo, then a bridge and a 1000 mfd cap rated at 75 vdc...Is it normal to
have 56 vdc instead of 32v unreg...I find this very unusual !! Please let me
know..
Schematic shows 52V typical with 116V supply voltage, 56V is not excessive especially if your mains voltage is a bit above 120V.
Ozan

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