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Old 25th Sep 2023, 11:22 pm   #1
Join Date: Dec 2011
Location: Cheshire, UK.
Posts: 50
Default Solartron srs 153s

Picked up this power supply on sunday from hack green rally, after curing a
Few silly faults its working.. sort of.. thing is i can’t turn the output voltage down to zero. Tested everything in the negative bias circuit, changed a couple resistors
That had gone high, & checked all the caps, but i still cant get it to turn down
To zero. The only thing i can think of are the two 5b/254’s in output are passing grid current & pulling the bias down. Removing one output valve at a time does reduce the minimum voltage quite a bit. They are connected in paralell..
It says 0-500v on the front panel so am i right in assuming it actually is suppoosed to go to zero?
thermion is offline   Reply With Quote
Old 26th Sep 2023, 1:34 pm   #2
Join Date: Apr 2009
Location: Scratby, Norfolk, UK.
Posts: 642
Default Re: Solartron srs 153s


The manual says 0-500volts, so that's my assumption too!

Kind regards
Dave757 is offline   Reply With Quote

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