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bruce2bowser@gmail.com: Jun 16 04:08AM -0700 > You're right. But the info applies to new TVs should a similar case come up.   > That is unless it uses those capacitive buttons. Whoever decided to use those for > this application needs to be boiled in bacon grease.   Insects roaming in and out of devices aren't any help, either.

"Paul Hovnanian P.E." <paul@hovnanian.com>: Jun 15 05:12PM -0700 I need some to restore some old telco equipment. The bulbs are a slide base, 24V 2W incandescent, similar to these:   https://www.grainger.com/product/LUMAPRO-Trade-Number-24PSB-21U505   but longer. The above lamps are 1-7/64" long (28mm). The lamps I need to replace measure 43mm.   These things are OLD. The above Grainger bulb has a plastic wedge-shaped base. The base of the lamps in this old equipment are wood.   Any ideas on sources or even the proper size/type name? -- Paul Hovnanian mailto:Paul@Hovnanian.com ------------------------------------------------------------------ If it wasn't for physics and law enforcement, I would be unstoppable!

N_Cook <diverse@tcp.co.uk>: Jun 16 09:01AM +0100 On 16/06/2018 01:12, Paul Hovnanian P.E. wrote:   > These things are OLD. The above Grainger bulb has a plastic wedge-shaped > base. The base of the lamps in this old equipment are wood.   > Any ideas on sources or even the proper size/type name?   I'm in the process of bulk disposal of my old shop stock, as you can see from the last update date http://www.diverse.ip3.co.uk/compfull.htm in the UK though, as in the pic you refereed to. IIRC they came from an aircraft repair facility , so maybe used in cockpits also

KenW <ken1943@invalid.net>: Jun 15 06:40PM -0600 On Fri, 15 Jun 2018 17:12:05 -0700, "Paul Hovnanian P.E."   >These things are OLD. The above Grainger bulb has a plastic wedge-shaped >base. The base of the lamps in this old equipment are wood.   >Any ideas on sources or even the proper size/type name?   Can't remember what they were. Used to fix cord boards in late 60's + oldest I repaired was a Stromberg Carlson rebuilt in 1943, the year I was born ! The lamps used in telephones are 52a and still available. The only thing I can suggest is an led with a series resistor to limit current and change brightness. Found this site http://www.oldphoneman.com/PartsPhoneSwitchboards.htm

KenW <ken1943@invalid.net>: Jun 15 06:47PM -0600 On Fri, 15 Jun 2018 17:12:05 -0700, "Paul Hovnanian P.E."   >These things are OLD. The above Grainger bulb has a plastic wedge-shaped >base. The base of the lamps in this old equipment are wood.   >Any ideas on sources or even the proper size/type name?   I searched for old telephone switchboard lamps or parts for old telephone switchboards

whit3rd <whit3rd@gmail.com>: Jun 15 12:59PM -0700 > 2N675 Veb 70v   > Really ? Seventy frikken volts ? That is phenomenal.   > What can I do with that ?   The obvious case is some kinds of one-transistor oscillators that reverse the base bias (a class C oscillator, obviously).   It's an artifact of Ge alloy transistor construction, the emitter was a plated-on metal that (when heated) diffused in. The collector was the same thing, from the other side of the Ge slab. And the slab itself, the 'base' was the third contact. So, the B-E and B-C breakdowns weren't very different.

tabbypurr@gmail.com: Jun 15 04:32PM -0700 > And, maybe I then do not have to go to eBay looking for a Chinese knock-off that *might* work. Or not.   > Peter Wieck > Melrose Park, PA   Better to feed in the values used in circuit plus a suitable margin. Many times I used beefier trannies than required because they were cheaper. TIPs in particular.     NT

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