Quote:
Originally Posted by marty59
The 804-4 is the "late production" version and the Sams is dated 3-66. Hopefully someone else will chime in here. I could be wrong but I believe the differences was with the IF's and tubes used? 1st and 2nd IF's used 6BZ6's and the earlier versions may have been the 6EH7's instead?
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Okay, I got the facts today - in both the "early" (as in 769-4) and "late" (as in 804-4) versions of the 24MC32, the IF strip is the same: (6BZ6)-->(6BZ6)-->(6EJ7/EF184). In fact, the whole tube complement is exactly the same. I saw one difference in the "tube layout - top view" on 804-4: It shows the vertical out as a 6HE6 instead of a 6HE5 - but even this is a typo, the schematic has 6HE5 and I can't find anything on the net that says a 6HE6 even exists.
The photos do show a different convergence board. The "early" shows a rectangular board about the same shape as a traditional TV screen above and to the right of the CRT neck. The "late", more like a "16:9" shape directly above the neck. As my 5317 has the squarer board, and a black HV cage, I'm assuming mine is an "early" (the picture of the "late" shows a shiny HV cage).
Differences in circuits were hard to find. One I found is where the brightness control is wired into the circuit. In the "early", it is between the delay line and the grid of the video out tube, whereas in the "late", it is soon after the detector, before the grid of the "cathode follower".