Why no love for this GE roundie ?

[tvcollector]

I ran the set probably less than a minute total at full 120v.. Nothing seemed to be burning out.. I started to smell the scent of burning dust, the horizontal output tube was the only thing I removed and also the HV lead with sucksion cup that connects to pic tube so I can remove the chassis.. I tested all the tubes, and there are alot of tubes with grid leakage, shorted, or weak.. I'm not going to power it up anymore until I get the horz osc coil replaced, tubes replaced, coils replaced, and the .047 600v cap replaced. Then I'll do a slow power up with lamp in series with 200watt bulb, and with all HV connected..

I tried the lamp procedure with a 100watt bulb and it didn't seem to work...

[DaveWM]

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.

[Findm-Keepm]

Originally Posted by tvcollector

I ran the set probably less than a minute total at full 120v.. Nothing seemed to be burning out.. I started to smell the scent of burning dust, the horizontal output tube was the only thing I removed and also the HV lead with sucksion cup that connects to pic tube so I can remove the chassis.. I tested all the tubes, and there are alot of tubes with grid leakage, shorted, or weak.. I'm not going to power it up anymore until I get the horz osc coil replaced, tubes replaced, coils replaced, and the .047 600v cap replaced. Then I'll do a slow power up with lamp in series with 200watt bulb, and with all HV connected..

I tried the lamp procedure with a 100watt bulb and it didn't seem to work...

Coil and cap on their way - trk# 9400109699939475974899

[init4fun]

Originally Posted by tvcollector

I tried the lamp procedure with a 100watt bulb and it didn't seem to work...

The bulb likely lit full brightness and the TV set not at all , correct ?

Your TV draws what , 300 to 400 watts , give or take a watt or few ? You will need light bulbs up to around 300 or 400 watts worth for the TV to get enough power to begin to show life . Doing this with bulbs is easy if you get 4 sockets and wire them in parallel , and then wire that parallel bank of sockets in series with the load , as you now have your single bulb . This way , and using an assortment of common 100 , 75 , and even 50 watt bulbs , you can slowly up the current by screwing in more and higher power bulbs till the desired current is reached .