07-10-2021, 10:31 PM
Just back in from a small family emergency some 20 plus miles away, (Blocked Bog!).
The part I am trying to understand is the action of the primary winding of the LOPT, the circuits I have looked at show that winding or parts of it in parallel with the line scan coils, so it is the combined L or just the L of the scan coils, or am I on the wrong track.
Also
If I look at this circuit from the Fergy
If I am following this correctly the supply for the line output can only go the V14 to point e when the valve/diode is conducting, then goes to the scan coils via point d and guessing that all the taps to C are acting a bit like an auto transformer. f to g being the overwind. I understand the heater winding for V13, but a to b? To me there seems to be a lot of windings that I think would add lots of inductance?
There is an article I am trying to follow and understand called scanning and synchronisation, this started in Practical Television September 1957.
Think I may have to look further back in the archives.
Probably a bit late to get sense out of me tonight, I will adjourn to sleep.
Adrian
The part I am trying to understand is the action of the primary winding of the LOPT, the circuits I have looked at show that winding or parts of it in parallel with the line scan coils, so it is the combined L or just the L of the scan coils, or am I on the wrong track.
Also
If I look at this circuit from the Fergy
If I am following this correctly the supply for the line output can only go the V14 to point e when the valve/diode is conducting, then goes to the scan coils via point d and guessing that all the taps to C are acting a bit like an auto transformer. f to g being the overwind. I understand the heater winding for V13, but a to b? To me there seems to be a lot of windings that I think would add lots of inductance?
There is an article I am trying to follow and understand called scanning and synchronisation, this started in Practical Television September 1957.
Think I may have to look further back in the archives.
Probably a bit late to get sense out of me tonight, I will adjourn to sleep.
Adrian
Learning as I go!
Youtube EF91 Valve
Youtube EF91 Valve
