Thank you very much Crist rigotti for the network information
unfortunately some information on the papers you sent me is not correct when it regards my networks
I was able to find a very very close schematic for my chassis wich even uses the same networks with same part numbers and same component layout... that chassis is the 11n51 and i found the schematic for it on Beitman publication of 1961.
Comparing my old networks with the beitman schematic everything is correct but on the sheet that Crist sent me there are a couple of typos, some incorrect cap values , some missing parts etc.
i have now finished recapping the board
here is the new vertical linearity pot 2watts wirewound and i put a 180ohm resistor in series to act as a stopper to avoid shunting the cathode direclty to ground accidentally if turning the pot all the way to one side. I may have to fit a bigger resistor if that one heats up we will see.
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here is an overview of the board with all the new components, you can also see i installed an overkill AFC diode. i used a welding machine double diode, its an ultra fast recovery diode, i used a massive one because it fitted directly in the socket without any modification and it was free
i did not replace the retrace suppressor integrator network yet, i think its not a critical part and i will replace it if i have problems with it
all the others i reproduced and replaced them all because most of them had resistors bridged across them on the bottom of the board indicating bodge repairs from the past
the 0,0039 cpacitor across the horzontal ringing coil was in very sad shape measuring twice the value so i replaced it and since i am going to have to tune the horizontal frequency for sure i went ahead and replaced the 390pf capacitor with a new silver mica 1kv part
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here is the back of one of the networks so you can see how i wired them up using solder to make traces
the goal was not to make an exact copy of the old part but to make a sturdy part wich is easily serviceable and modifiable if needed, the legs are made with thick 1.5mm copper so they dont bend and short to the chassis or other components
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when i first powered up the set before recapping i had a good raster for some seconds but then i started to see some arcing inside the damper and i shut off the tv thinking it was a bad boost capacitor. I dindt worry about that because it was going to be recapped fully...
Now after recapping the problem remained. arcing inside the damper and blue glow inside the horizontal output. the raster gets darker and breaks down into a zig zag pattern once the arcing starts. removing the top cap of the horiz output and reinserting it live makes the raster come back for a second and then it goes crazy again.....by looking at the horizontal output tube's getter it seems to me that the tube has some air in it. atleast my boxes full of pl36 and pl500 tubes all of them have shiny silver getters and this one is hazy and has some sort of blue colour on the edges.
i dont have any american tubes here so i placed an order for a new damper, horizontal output and a couple of spares for the vertical, audio and others.
i hope its not a problem on the flyback. i checked continuity and resistance of all the windings but that means nothing, nothing looks burnt and i did not see arcing on it and i did not smell any ozone. i think there is a high voltage ceramic disk cap on the horizontal yoke but i am unsure it would cause this and i dont want to mess too much on that area. lets see what happens when the tubes arrive.
meanwhile my flyback is part number 328951 and i am preparing for the worst, if it is bad i need to try and source something that i can fit in...i have rewired and fitted different flybacks on tvs before with sucess but those were german sets that i am used to work with.
when comparing this with other philco flybacks, besides the mechanical fittment this one has a winding separated from the others that goes to both plates of the 6by8 AGC gate/clamp and that winding seems to be absent on most philco schematics i have been looking at
here is the suspicious horiz output
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