Quote:
Originally Posted by 7"estatdef
I picked up a 1077b about a year ago at a flea market. Didn't really realize what I had gotten till I got it home and gave it a good looking over. Quite a handy piece of gear for generating a test pattern, checking rf and if stages, audio, video, and horizontal stages.
There is a guy that repairs them, but more importantly he has replacement slides for the test patterns. He has a web site. What's the difference between the 1076 and the 1077?
Terry
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The next model after the Dynascan Video Generator was the first Television Analyst, model 1075, looks nearly identical to the Dynascan unit, same deep bench footprint. I have a manual for that model. Basically, it has nearly all the features of the 1076 except for the Yoke/Flyback test and may or may not have had color provisions and the color bar slide for gated rainbow output. I'd have to pull the manual out of storage to check that. The 1075, IIRC, used a 5U4 LV Rect. Not sure if HV Rect was 1B3 or 1X2.
I have a 1076 in great shape with slides, no manual. Pretty straightforward to service and maintain. Uses solid state LV Rect diodes instead of 5U4. Octal tubes in Horiz. Out and Damper functions, parallel heaters, 1X2 HV Rect. Has color provisions and the gated rainbow slide.
The 1077 is basically a 1076 with series-heater tubes, transformer with solid state LV Rect for B+, Compactrons in place of Octal tubes, a solid-state sweep triggering circuit driving tube sweep oscillators, UHF output, and dual sweep drive outputs for both tube and solid state chassis. I have a 1077 in very good condition with manual and slides. I have the 1077 set up at my main service bench and the 1076 at my first auxiliary bench. I use a DVD player and RF Modulator when away from the two main benches where my Analysts are. Typically the DVD gets used most during the fine setup adjustments after final assembly. The image from my own computer-drawn test pattern graphic provides the closest thing to a broadcast-quality test pattern I have seen, IMO. The B&K units are real close, but have yet to match the DVD despite side-by-side comparisons with it while calibrating both of my B&K units.
As I understand it, the 1077B is a further update of the 1077 with more solid state circuitry and more features designed to support early solid state chassis.
As for the quality of my test pattern DVD, I've concluded that the only way I could improve upon it (if any improvement were needed) would be to upgrade to newer CAD software with improved algorithms for conversion between Vector and Raster graphics. For my purposes, I find TurboCad 3.0 is adequate and affordable. To spend 4 grand for AutoCAD would be serious overkill.