Bush TV22

[tv baron]

Hi bit of help on line stage i dont have an eht meter i get a nice arc of one side of the ey5i on coil c but not a lot to tube the heater is lit on the ey51 do the over winds go faulty coil f thanks

[Freya]

EY51`s go bad, their leads have a habit of dropping off at the pinch. But the overwinds also do suffer from both saturation and shorted turns.

[Sideband]

There is loads of information on the LOPT's within these forums. It will probably benefit from drying out and the preferred way is to pass a small current through the overwind so that it gets warm (not hot) for several days.

Try doing a search TV22 LOPT or Bush LOPT

[mark pirate]

Well worth drying out the LOPT, these have a habit of developing shorted turns.
I always fit a new EY51 to any set I restore, usually increases EHT by 1 to 2 kv.


Mark

[tv baron]

Hi now starting to go round on caraculs have a set wit no raster but sound the brightness pot with about 100 volts get spark of over wind ey51 lit no eht probe but put avo on 3kv on final anode went right over on the metrosil to a1 on transformer side 250 volts other side to tube15 volts suspect transformer winding but not sure any help thanks

[HamishBoxer]

I would not put an AVO on final anode! Could be higher with correct set up, trust Ion Trap is in the right spot?

[tv baron]

Hi have now got EHT but low A1 volts sorting out to 100 volts give raster but low volts from the Metrosil what can I replace it with

[FRANK.C]

If I remember correctly there is a sneaky wax paper capacitor hidden under the tagboard that can drag the A1 volts low.

Frank

[tv baron]

Thanks Frank spot on now have a raster well hidden I'd changed all the others but you cannot see it thanks for info one step closer

[tv baron]

Hi have now got a signal to it and a hedgehog test card can lock frame between two half's and mods out there for frame stage thanks

[tv baron]

hi having problems frame will lock but two half frames are there any mods out on this old lady thanks