My CTC-16XL Project.

[trinescope]

If you're somewhere around Dallas/Fort Worth I'd be willing to do the alignment free of charge. I don't believe these sets were aligned somehow "matching" the tuner; in fact many set makers bought their tuners from outside sources rather than making the tuners themselves. Otherwise the alignment curves would show something other than marker frequencies in the IF range. Rather the IF was set up to manufacturer specs and the tuner done so separately and then the two should get along well afterwards. Tuners generally don't need much in the way of alignment unless something bad happened. All they really have to do is reject signals outside of the selected channel; all the other frequency traps and response shaping adjustments are in the IF strip.

[Yamamaya42]

Originally Posted by trinescope

If you're somewhere around Dallas/Fort Worth I'd be willing to do the alignment free of charge. I don't believe these sets were aligned somehow "matching" the tuner; in fact many set makers bought their tuners from outside sources rather than making the tuners themselves. Otherwise the alignment curves would show something other than marker frequencies in the IF range. Rather the IF was set up to manufacturer specs and the tuner done so separately and then the two should get along well afterwards. Tuners generally don't need much in the way of alignment unless something bad happened. All they really have to do is reject signals outside of the selected channel; all the other frequency traps and response shaping adjustments are in the IF strip.

Almost, but not quite
I'm in the Austin area, 20 miles north, Round Rock. the place I was referring to is Dean TV Repair on N, N Lamar Blvd here.

[old_coot88]

Originally Posted by trinescope

the IF was set up to manufacturer specs and the tuner done so separately and then the two should get along well afterwards. Tuners generally don't need much in the way of alignment unless something bad happened.

There is usually an item in the tuner called the 'mixer plate coil', and if it's adjustable, it is part of the IF alignment. If I remember correctly, the RCAs took the mini hex tool for that adjustment.

[trinescope]

I had to look at the alignment instructions for this chassis and yes you are correct. That coil, although part of the tuner, is actually on the IF side so yes, it would be part of the procedure since it's really part of the IF strip. I'm guessing its response is a bit more broadband than the other adjustments.

[old_tv_nut]

Originally Posted by trinescope

I had to look at the alignment instructions for this chassis and yes you are correct. That coil, although part of the tuner, is actually on the IF side so yes, it would be part of the procedure since it's really part of the IF strip. I'm guessing its response is a bit more broadband than the other adjustments.

Since the instructions are just to tune for max at 44 Mhz (mid band), it does seem likely it's broadband. It's a simple adjustment in any case, even if it does affect the tilt somewhat.