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Old 03-05-2017, 09:23 AM
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Username1 Username1 is offline
Not sure how I got here.
 
Join Date: Dec 2009
Location: Orange County NY
Posts: 3,584
To be more clear: Take the cap off the 6BK4, then run the set.
This will take the shunt regulator out of the circuit.
By definition, the shunt regulator puts an additional load
on a power supply of limited current availability. It relies on
additional loading to provide voltage regulation.

Think of the HV supply as providing enough voltage and current
to run the picture tube. When the picture gets dark, beam current
would go down, reducing load on the HV supply. Voltage would
naturally go up. The 6BK4 should then conduct more, and load the
HV supply source, and bring down the voltage level.

Removing the HV lead, or plug at the end of the tube takes out the
main current user of the HV supply, HV should go up as it has a very
limited load at this time.

Normally, the set should supply 20 - 25KV to your set with a mid brightness
picture on the screen. You have to determine if the supply has a problem
or if there is a problem with the tube, or the reg.

It is fairly easy to disable the regulator. Then move on from there.

Your tv sure looks like it's producing a nice bright picture.


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Last edited by Username1; 03-05-2017 at 09:28 AM.
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