Is that a 29JC20? If it is, then you just scored Zenith's first consumer color chassis....Quite a rarity.

The one in my basement I showed you is a 29JC20, and I adapted it's AV mod to the set I sold you....That mod may have come full circle.

25LC30. I wish it was that set in your basement! I love blonde wood.

One thing I don't know if you've ever noticed, these sets could do with a Pre-Amp for the A/V mod. I took the time and got the tuner to work better today, and the picture is WAY brighter.

Are the convergence clovers assemblies swap-able? I want to know if the newer red, green and blue covers will swap in place of the older style ones. Mine is held together by a couple zip ties, and I located a more modern one that's red green and blue, like in my 25MC33 set.

As long as it is from a roundy (some rect zeniths used smaller RGB clovers) it likely will work. I likely have a Zenith factory schematic, and possibly a full manual for your chassis that I could find and copy for you after the ETF meet this weekend.

I kinda thought it could use a pre-amp, but did not have time to make one.

BTW a word of note: To prolong the life of your CRTs run them at minimum acceptable brightness....If I'm watching in a darkened room I turn them down from day settings to save usable life.