Old Muntz TV for sale Locally to me, Should I pick it up?

[Tube TV]

How many ohms is there between the ground and the white wire you unsoldered?

[vortalexfan]

Originally Posted by Tube TV

How many ohms is there between the ground and the white wire you unsoldered?

There is 256.6 Ohms between ground and the white wire that I unsoldered from pin 2 of the 5U4 tube socket.

[Kevin Kuehn]

Originally Posted by vortalexfan

There is 256.6 Ohms between ground and the white wire that I unsoldered from pin 2 of the 5U4 tube socket.

Is that white wire connected to the same point as the negative side of C1A & B as it appears in your picture? If so it needs to be moved to the plus end of C1A. Also check to see if R93 is in fact still 15 ohms.

[vortalexfan]

Originally Posted by Kevin Kuehn

Is that white wire connected to the same point as the negative side of C1A & B as it appears in your picture? If so it needs to be moved to the plus end of C1A. Also check to see if R93 is in fact still 15 ohms.

It was but then I switched it around once I realized it was hooked up wrong.

I powered it up with that white wire disconnected from the 5U4 tube and it didn't arc anymore.

I'm guessing that means that the Filter Choke may be bad? How hard is it to replace those and how expensive are they to buy? Also how necessary is it to have that filter choke in the circuit? Can the set be ran without it in circuit?

[Kevin Kuehn]

Originally Posted by vortalexfan

It was but then I switched it around once I realized it was hooked up wrong.

OK, so you switched it around. Have you powered up the set with the white wire connected back to pin 2 of the 5U4 since you switched it? If you previously had that white wire going to the negative side of the C1A, & B caps, that alone explains why the set was drawing excessive current, because that point connects to the center tap of the high voltage windings. Normally there would be 15 ohms from that point to chassis ground, which is why I suggested you also measure the resistance of R93(should be 15 ohms)

Originally Posted by vortalexfan

I powered it up with that white wire disconnected from the 5U4 tube and it didn't arc anymore.

I'm guessing that means that the Filter Choke may be bad? How hard is it to replace those and how expensive are they to buy? Also how necessary is it to have that filter choke in the circuit? Can the set be ran without it in circuit?

[vortalexfan]

Originally Posted by Kevin Kuehn

OK, so you switched it around. Have you powered up the set with the white wire connected back to pin 2 of the 5U4 since you switched it? If you previously had that white wire going to the negative side of the C1A, & B caps, that alone explains why the set was drawing excessive current, because that point connects to the center tap of the high voltage windings.

I did try it out with the wires switched and it still arced, but not nearly as bad as it did and the tube wasn't trying to red plate either like it was before I switched the wires.
Basically its doing the same thing it did before I replaced the power supply caps.

[Kevin Kuehn]

Originally Posted by vortalexfan

I did try it out with the wires switched and it still arced, but not nearly as bad as it did and the tube wasn't trying to red plate either like it was before I switched the wires.
Basically its doing the same thing it did before I replaced the power supply caps.

Then by all means do as Electronic M suggested and check resistance from each lead of L1 to chassis ground. You may need to disconnect both L1 wires from the circuit to get an accurate reading.(as Tube TV said above my post)