63 silvertone

[DaveWM]

been thinking about it, maybe the regulator is ok, just a little aggressive on the high point of what it will allow the HV to go to.

so check the voltages on that tube and check the current thru the shunt wire, see if it varies from .5 to 1.5 as you adj the HV pot.

[DaveWM]

voltage look ok, now to check the current disconnect the shunt wire and get a reading. adj the HV pot and note the high and low points.

do this

dark screen, current at HV low setting, current at HV high setting.

normal brightness screen, current at HV low setting, current at HV high setting.

[timmy]

all readings do vary, dark screen low hv set 1.64 high hv set 0.93 bright up screen hv low1.16 high hv set 0.20

[DaveWM]

all that seems correct.

and yet the HV varies from 23kv to 19kv based on brightness?

One last test, check the cathode current of the 6JE6 (or is it a 6DQ5) and check the screen and grid voltage of that tube as well. should be about 140v on the screen and -50v on the grid.

[timmy]

yes based on brightness as well as scene changes, white scenes it drops wont regulate to keep it up,this is baffeling. ok ill check the cathode currant and the other on the 6dq5.

[DaveWM]

the way is should be working is the HV should hold up until the current thru the shunt tube drops to zero. since the lowest you saw as .2ma thru the shunt, I would have thought the HV was still holding.

the cathode current should be 180-205 ma, a lot to do with line voltage.

the screen should be around 140v

the grid should be -50v

[timmy]

6dq5 pins 1-5 -56.2 pins 4-8 142v and the cathode currant is 190 ma

[DaveWM]

Originally Posted by timmy

ok #5 390v # 2 402 on the reg tube.

did you mean #5 and #1?

[timmy]

no that was the regulator tube #5 390v and #2 402v i think its on the previous page.

[DaveWM]

you should measure the grid and cathode of the reg 5 and 1

[timmy]

something odd here i tried to discharge the anode of the tube when sliding the chassis out and i have yet to get a small spark it almost seems as if its not holding any hv. chassis ground to anode with the crt plug on, no spark, could there be some connection here because i am lost i used to get a small spark but i dont see it now. what would go bad in this tube if it tests good in a areas?

[timmy]

Originally Posted by DaveWM

you should measure the grid and cathode of the reg 5 and 1

5 and 1 the currant or voltage, if voltage i just would have to do # 1 5 i did already.

[Username1]

If the picture tube is not holding a charge.... Look for leakage from the 3a3 heater
windings on Flyback to ground....?

And check out what Dave said about measuring the grid and cathode voltage on the reg. tube.

.

[DaveWM]

you reported back on 5 and 2 that is why I quoted you. are you sure you did 5 and 1 votages

[timmy]

im sorry the #1 i did check voltage not #2 because it looks like the heater is 2. so #1 is 402 v