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you don't want to do a slow power up with the Horz Out in place.
better process would be:
fix coil, remove the horz out and the vert out tubes
put a meter on the 400v b+ to monitor voltage
put a AC amp meter on line to monitor line current and a AC voltmeter to check voltage
use a variac (dont use a light bulb), mine has the AC amp and AC volt built in.
ramp up to about 30vac.
B+ should be up around 150vdc
leave it there for a bit say 10 min then take it up to about 60vac B+ should be about 300vdc, AC current will prob be under 1 amp, see if the filter caps are getting warm at all. wait another 10min then go to about 80vac B+ should be getting close to 400vdc AC current will not go up much,leave it for 10 min keep watching to see if there is any sudden changes, B+ may continue to rise after dropping a bit. prob have audio if all going well at this point then power off, put the vert out and horz out tubes back in, put a meter in series with the cathode of the horz out (may be a jumper that needs to be opend for this) set to a min scale of 250ma, hook up an HV prob, and do a full power start up.
watch the cathode current of the horz out. As that tube warms up watch the current it should stop at around 200ma (and you should see/hear the crackle of the HV). check the sams for the correct HV setting make sure its right or adj the pot to set it, then check the eff coil for the dip.
if the HO cathode current starts heading north of 250ma shut down, you have a problem.
Not a good idea to slow start with the sweep tubes in.
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