On Wednesday 19 July 2017 19:04:33 Doug wrote: > On 07/19/2017 05:44 PM, Joel Rees wrote: > > This is another aspect of "closed source" gratis technology that is > > often swept under the rug. > > > > It used to be, for instance, that a TV in the US had a full diagram > > of working parts in the back case, so that the TV could still be > > fixed even if the manufacturer suddenly wiped their books and > > disappeared. > > Not at all true! As a sideline I was a TV serviceman in the 1960s. > There usually was a drawing of the tube numbers and positions > somewhere in the set--more usually on an inside surface of the > wooden box. There certainly was no schematic diagram. > However, it was almost always possible to obtain real service > information including schematic diagrams of the circuits from > a paid service, the name of which escapes me now. (The pages > always included useless ones for record players and such that > nobody ever heard of!) > > --doug--almost 80!
Doug is correct. Every shop had a subscription to SAM's and toward the end as many as 9 or 10, tall 4 drawer fileing cabinets to keep the stuff in if the subscription was for all of the stuff. Doug is chasing me, I'll be 83 in October. But by 1962 I had a 1st phone, and put it to work in 1964 by getting a job as transmitter operator at KOTA-TV in Rapid City. Never really left broadcast engineering until I retired from the CE position after 18 years in that office at WDTV here in WV, at nearly 67 yo, in 2002. Very little went out to be repaired, if I could get the parts, I could fix it. Pretty good for a guy with an 8th grade (State of Iowa version, USA) education. :) Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene>