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Old 23rd Apr 2018, 10:43 pm   #11
1100 man
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Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK.
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Default Re: DC Restoration questions

Quote:
Originally Posted by FERNSEH View Post
In the models V17-53 and V17-70 the sawtooth waveform supplied to the output valve is positive going so the inverted forward scan at the anode of the output valve is negative going and the flyback pulse is positive.

DFWB.
Hi David,
I was considering using the AGC circuit from the VT9-17 (post 78). Like the V17-70 (& Pilot), it uses the positive going flyback pulse from the anode of the o/p valve.
Positive going video can be obtained from the demodulator, so as far as I can see, the most important requirements are met.
I take your point that the flyback pulse from the V17-70 is not suitable for the simplified circuit of the V17-60.

Many thanks
Nick
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