1950s or '60s vintage Zenith TVs, Need some info

[Kevin Kuehn]

OK I'm very sorry for the mix up, but the Sams for your TV doesn't even show my tuner on page 12. I have 2 Sams folders and the Riders all sprawled out for these TV's and it's all gotten just a little disorganized. But I did just look at the Sams for your set and it appears you have a circle of holes in the front side of your tuner that should be your local oscillator adjustments. But I'm going to go study that some more right now.

[Kevin Kuehn]

Does this page 7 match your Sams? Clearly shows the front local oscillator adjustments along with the channel number designations. I would think as long as you've already twerkulated your IF slugs there would be very little harm in trying to fine tune the oscillator adj. associated with either channel 3 or 4. This drawing also explains why your channel positions don't match mine.

https://live.staticflickr.com/65535/...252c2ebc_o.jpg

[vortalexfan]

Originally Posted by Kevin Kuehn

OK I'm very sorry for the mix up, but the Sams for your TV doesn't even show my tuner on page 12. I have 2 Sams folders and the Riders all sprawled out for these TV's and it's all gotten just a little disorganized. But I did just look at the Sams for your set and it appears you have a circle of holes in the front side of your tuner that should be your local oscillator adjustments. But I'm going to go study that some more right now.

My TV is the one covered in Sam's 333-17.

Yes the tuner on my TV has 13 adjustment screws arranged in a circle in front of the tuner that are marked 2-13.

I was thinking I might just see if I can hook the 1076 up to the tuner on my TV via the VHF antenna terminals on the back and then tune in each respective channel on the 1076 and check the tuner adjustments.

I'm just curious but when got this TV and first started working on it the 5BK7 RF tube in the VHF tuner was subbed out years ago apparently with a 4BQ7 tube, and I'm just wondering but could it be possible that someone had to tweak the tuner adjustments when they installed the 4BQ7 tube into the tuner in place of the original 5BK7 tube to get the tuner to function properly with that tube?