Quote:
Originally Posted by jr_tech
. I remember that they used a pattern generator that looked "unfinished" in that the tubes were visible when they were using it. jr
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Yeah, several of the first Bar - Dot generators, especially the ones made by B&K were in a black suitcase, and when you opened suitcase to use it, the chassis inside was topless. It had more tubes in it than the average B&W TV!
The first shop in Atlanta that I worked in had one of these and the running joke was they made it this way so it would be easier to change the tubes. We spent more time working on that pile of junk than using it. Tube counting circuits get real problematic if the tubes get bounced about while doing service calls.
It was replaced with tiny solid state battery operated unit in 1959 and that unit was trouble free unless someone forgot to turn it off and the next day the battery would be kaput. At the time the battery was a non-standard battery, which was only stocked by the manufactuer.
Jas.