

| Subject: | Re: Are Today's Young People Mechanical Nitwits? |
| From: | Mike Elliott |
| Date: | Fri, 15 Aug 2008 07:10:17 -0700 |
But a brilliant stream of consciousness. There may have been transistors in those radios that did nothing, but I distinctly remember there being several transistors being used merely as diodes, with the collectors not connected. I recall the smell of tube radios, with their phenolics and waxes, and remember trailing Dad to the local drugstore to test tubes. If a bad tube was found, the store manager appeared to open the cabinet that the tester sat upon and, after fishing around inside for a few moments, pulled out the replacement tube with a flourish. How the flourish got into the cabinet in the first place has always puzzled me. -- Mike "Rocket J Squirrel" Elliott ------ On 8/15/2008 6:46 AM David Beierl wrote: > At 02:35 PM 8/14/2008 -0600, Gary Lee www.vwrack.com wrote: >> I am told that in the 70s there used to be tube testers and vacuum >> tubes sold at the grocery store. I guess people, just ordinary >> people, would fix their own tvs and radios. That was also a time > > Definitely '60s. Fading in the '70s I think, as transistors took > over. Tubes were consumables and mounted in sockets (and on the > opposite side of the steel chassis from the fiddly bits, so other > than getting burnt they were pretty safe to deal with). There were a > gazillion table radios that all used the same set of five tubes whose > filament voltages not coincidentally added up to 117 volts -- that's > the sort of thing the drug store would carry. > > The testers were about the size of an open briefcase on a stand, big > meter, bunch of dial switches, sockets for quad, octal, 7- and 9-pin > miniature, clip lead for tubes with a top contact, and a big list of > tube types with switch settings for each, maybe on a scroll behind a > window on the tester. Testing instructions printed on the > machine. So if your radio or TV got funny, you'd pull all the tubes > and stick them in a paper bag (not so many plastic bags then) and > take them to the drugstore, or Radio Shack, or Lafayette Radio, or a > repair shop maybe, and test them all. With any luck (or some > patience) you wouldn't burn yourself much, and with *decent* luck you > wouldn't have rubbed off the tube numbers, or would have wrapped a > piece of paper around them with the number on it. > > There is absolutely nothing like the smell of tube electronics that's > lived in the company of smokers. Not bad, but distinctive. > > When we attended John Kennedy's funeral in fall '63, we also listened > to it on a (paperback-size) Matsushita Electronics five-transistor > AM-only radio that Dad got for CONELRAD alerts. Like most (?) radios > then it had the two CONELRAD frequencies marked on the dial (Dad was > an engineer, his version of two-weeks-rations for our "shelter" -- > the pantry under the cellar stairs -- was whatever was in the pantry > plus our spare 50-lb bag of Purina dog chow). Nice little radio, > orange front and gray back. Cost maybe $50 or so? Used a 9v > battery. We were far enough away that we heard it on the radio 2-3 > seconds before we heard it live. That was maybe a little before the > "transistor wars" when cheap radio brands (Lloyds comes to mind) > would throw transistors at a design so they could boast about how > many there were, like 23-jewel watches. I think one or two maybe > even stuck totally nonfunctional transistors on the board. Circuit > boards (Wow! Printed Circuits!) were single-sided phenolic/paper. > > Interesting times...if you get a chance to view Robert McNamera's > _The Fog of War_ you'll get to see the then SecDef forty years later > so frightened of what almost happened in the Cuban Missile Crisis > that he still can't come right out and say the words. You can see > him try, and fail. I recommend it -- I started to watch it > perfunctorily because it had to go back to the store that night, and > was absolutely riveted. > > </stream of consciousness> > > David > > > -- > David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/ > '84 Westy "Dutiful Passage," '85 GL "Poor Relation" >
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