Hi alan
thanks. i have some good used dual schotky diodes with common cathode that i can use
i tried searching for the name you gave me but i could not find the guy, can you tell me how to reach him?40€ seems cheap but i want to make the parts myself i just need the layout for my part-numbers maybe he is willing to sell that information to me. I could dip the integrators i am making in epoxy and them paint them orange but i think i will have to troubleshoot alot until the tv works good so for now i will not paint them/dip them.
i have already done another integrator, it is the one on the sync separator. this one has the schematic drawn on the back and it is much more complex than the usual ones on the 10L43 chassis. it uses 8 components and has 7 legs.
the old one had 2 open resistors and one capacitor that measures nothing and somebody bridged a resistor across, it does not seem like a factory modification for sure, looks like some tech bypassed most of the integrator with a 1 meg resistor maybe just to make the set work quickly and dirty
here is the board almost finished
there are a couple of components still not replaced for example the 0,0039uf capacitor across the horizontal osc coil wich is a 10% rated part. i will have to place an order on mouser because i cant find that value locally and the value is crtical on that circuit.
i am also disassembling and cleaning the inside of all the pots. You would be surprised of the amount of crap inside those and just spraying them doesnt work very well. I disassemble them, clean them and bend just a little bit the contact points just to make them press a bit harder against the carbon trace and then i test them.
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here is the sync separator network already installed, yes i used some ceramic disk capacitors and i am not ashamed of that,just because i had them in my drawers and i dont think they will be hot enough to cause trouble in this area of the board ,also i dont think a slight drift will affect anything on this circuitry.
i also used some good used resistors that i had in my stash that measured spot on..i am all about convenience, i dont like waiting for parts if i have good reliable ones at hand.
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here is the back and its quite "complex"
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here is the old part wich is made out of individual components
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here is the back with the layout diagram
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i think i will do the horizontal integrator that couples the oscillator to the output tube and do a test run on the tv before doing the rest of the integrators.
the horizontal coupling is K7 on the sams for the 10L43 and it has the same part number than the one on my tv so i can do it without fear.
the other three are different part numbers...one of them is on the horizontal AFC area, the other one couples from the sync separator to the vertical osc and the other tiny 3 legged one seems some sort of retrace suppressor
i had already told you that this tv doesnt have the range switch but i found a point on the board labelled "range switch arm" and that point is connected directly to a b+ line
this tv also has a 1uf 50v non polarized cap going from an AGC voltage point to ground.
on most of my german TVs the boost voltage is in the order of 500 to 900volts and we have to use a special type of ac pulse capacitor, i usually go for the wima MKP series, and the manufacturers usually use 1kv or even 1,25kv rated parts.
on this tv the boost voltage is only 400v and the boost reservoir cap was a standard 600v part so i went with a 630v film cap. if that is not advisable please tell me, it is easy to change.