mecha
Well-known member
I have a K7500 (from a Blitz '99) with a Zenith tube that was rejuved 3 years ago that didn't hold out for very long.. went back to the shorted red and dim green. last month I found a 25" Samsung at the end of the driveway at one of my neighbor's houses and figured "our Carnevil's got a K7500 with a Samsung tube" so I gave it a whirl..
the tube numbers didn't match up, but they both started with A63, and the yoke readings were about an ohm off each way.
Zenith: hor. 1.0 ohm / ver. 7.5 ohm vs.
Samsung: hor. 1.8 ohm / ver. 6.5 ohm
I figured that was close enough (from what I've read in other threads), but given it's a medium resolution chassis, I think I had to do the yoke swap regardless. so I did that, and kept the Samsung rings. (as per what I've read everywhere..)
I'm going to assume the CRT neck pinouts are the same cause I didn't blow anything up and I'm getting a white/grey picture (had to turn the G2 up high to get any real picture). you'll see in my picture that there's a chunk of the left side that's black. the yokes, oddly enough, look virtually identical, and I placed the K7500 yoke in the exact same spot the old one was, and the rings I marked with a sharpie before I pulled them to put the K7500 yoke on.
if anyone has a logical explanation for why this happened, or even better yet, knows what I can do to fix it, I would appreciate it!
the tube numbers didn't match up, but they both started with A63, and the yoke readings were about an ohm off each way.
Zenith: hor. 1.0 ohm / ver. 7.5 ohm vs.
Samsung: hor. 1.8 ohm / ver. 6.5 ohm
I figured that was close enough (from what I've read in other threads), but given it's a medium resolution chassis, I think I had to do the yoke swap regardless. so I did that, and kept the Samsung rings. (as per what I've read everywhere..)
I'm going to assume the CRT neck pinouts are the same cause I didn't blow anything up and I'm getting a white/grey picture (had to turn the G2 up high to get any real picture). you'll see in my picture that there's a chunk of the left side that's black. the yokes, oddly enough, look virtually identical, and I placed the K7500 yoke in the exact same spot the old one was, and the rings I marked with a sharpie before I pulled them to put the K7500 yoke on.
if anyone has a logical explanation for why this happened, or even better yet, knows what I can do to fix it, I would appreciate it!

