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Old 14th Mar 2017, 10:56 pm   #1405
vidjoman
Dekatron
 
Join Date: Jun 2013
Location: East Sussex, UK.
Posts: 3,315
Default Re: The "Sussex" Homebrew Valve Tester.

Have you fitted R6 on the PCB - it's not shown on the layout on P26 of the manual - assuming you are using the original board layout. The holes are there between AJ & AK - top right of the drawing.

Have you checked the audio osc output level that feeds to the grid?

The extra diode added in series with D16 was fitted for a reason, but I can't remember why now, but it's described somewhere - found it on page 23.
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