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1100 man · 23rd Apr 2018, 10:59 am

I've been studying the circuits for the V17-60 & VT9-17. The 17-60 has many interesting features- two sync separators being just one of them! They must have set out to design a really good chassis:- nothing like the paired down V17-70!
The VT9 AGC circuit looks a realistic possibility. The pulse feed comes from the anode of the frame o/p valve. The waveform here in the Pilot is the same as that shown for the VT9. The whole circuit only uses a triode & two diodes so is 'within budget'!
Can you see a reason why it won't work?

All the best
Nick

23rd Apr 2018, 10:59 am	#9
1100 man Octode Join Date: Apr 2016 Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK. Posts: 1,377	Re: DC Restoration questions I've been studying the circuits for the V17-60 & VT9-17. The 17-60 has many interesting features- two sync separators being just one of them! They must have set out to design a really good chassis:- nothing like the paired down V17-70! The VT9 AGC circuit looks a realistic possibility. The pulse feed comes from the anode of the frame o/p valve. The waveform here in the Pilot is the same as that shown for the VT9. The whole circuit only uses a triode & two diodes so is 'within budget'! Can you see a reason why it won't work? All the best Nick