Re: The "Sussex" Homebrew Valve Tester.
Yes, that's what I thought, have tried another capacitor just in case. The fuses were from RS, supplied by Taiwan company so hopefully OK. Have TR2 and TR4 wired correctly with the anode/screen switches in circuit, no other loads downstream. Circuit is working correctly as 0-300V selectable in correct sequence. Will try and scope it tomorrow if have time.
Andy
|