Hallicrafters T-506 Late Production Set

[M3-SRT8]

Another question: I hear the HV RF Coil is a soft spot on these TVs.

Should I:

1. Clean and bake it at 180 degrees?

2. Space the top lid by .25"

3. Add a muffin fan?

Love to see a pic of the HV Cage with the fan installed.

Thanks.

[Tom Albrecht]

Originally Posted by M3-SRT8

Another question: I hear the HV RF Coil is a soft spot on these TVs.

Should I:

1. Clean and bake it at 180 degrees?

2. Space the top lid by .25"

3. Add a muffin fan?

Love to see a pic of the HV Cage with the fan installed.

Thanks.

My experience with a Hallicrafters set that had a problematic coil was as follows:

1. Clean, bake, and coat with fresh varnish: Temporarily fixes the problem, but not long term. (although others have reported better results)

2. Lift the lid by 1/4 inch: not sufficient to help.

3. Add muffin fan and lift the lid: works well. I had a very small muffin fan that fit inside the cage. About 30 mm square, 10 mm or so thick. Didn't like the noise it made.

4. Best fix: replace the coil with a different one (I used a donor from a Teletone junker)

Not all Hallicrafters sets have this problem. You might be lucky and have one of the good ones.

[kvflyer]

I have this to look forward to! I have one in queue. I also like the stainless steel paint that was used on the metal cabinet, but have not found it locally.

[M3-SRT8]

[QUOTE=Tom Albrecht;3212247]My experience with a Hallicrafters set that had a problematic coil was as follows:

1. Clean, bake, and coat with fresh varnish: Temporarily fixes the problem, but not long term. (although others have reported better results)

2. Lift the lid by 1/4 inch: not sufficient to help.

3. Add muffin fan and lift the lid: works well. I had a very small muffin fan that fit inside the cage. About 30 mm square, 10 mm or so thick. Didn't like the noise it made.

4. Best fix: replace the coil with a different one (I used a donor from a Teletone junker)

Not all Hallicrafters sets have this problem. You might be lucky and have one of the good ones.[Quote]

Would doing the 1st 2 suggestions help? I mean before I power it up.

[M3-SRT8]

The bottom of my HV Coil assembly has a resistor on Pins 5 and 6. It doesn't show up on the schematics that I'm looking at (late production 6AU6 T-54) and I can barely read the bands. I THINK it's Green-Black-Yellow. 500 kohms. Half watt.

It tests OL on my Fluke. The 6C4 oscillator is such a critical tube so I want to get it right. My HV Coil board has two .25uF 600V and one .001 6kV.

Any ideas, Gents?

[M3-SRT8]

Originally Posted by M3-SRT8

The bottom of my HV Coil assembly has a resistor on Pins 5 and 6. It doesn't show up on the schematics that I'm looking at (late production 6AU6 T-54) and I can barely read the bands. I THINK it's Green-Black-Yellow. 500 kohms. Half watt.

It tests OL on my Fluke. The 6C4 oscillator is such a critical tube so I want to get it right. My HV Coil board has two .25uF 600V and one .001 6kV.

Any ideas, Gents?

It's a cap. Measures 2.7 pF. Specs at 4.7pF. Duh.