- Oldtimer question (valves/tubes) - 14 Updates
| Mike Coon <gravity@mjcoon.plus.com>: May 13 11:35AM +0100 In article <qba4km$gun$9@dont-email.me>, curd@notformail.com says... > > chap who IIRC has since died. > I think you'll find AVO took over Taylor in the late 1950s so it's all > just about dates of manufacture. Oh, thanks, I might look that up. But the valve tester would certainly be older than that. It did have a lacquered wooden case, after all! Mike. |
| Cursitor Doom <curd@notformail.com>: May 13 11:23AM On Mon, 13 May 2019 20:53:55 +1000, Lucifer wrote: > I picked up a valve paging transmitter from a rubbish tip. > It was in working order, 5 watts output on 27.212 MHz, with the crystal > in an oven. Nice find. It's amazing what gets thrown out! I dream of owning an apartment overlooking a vast garbage tip so I can spot anything potentially valuable being dumped. ;-) -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| Cursitor Doom <curd@notformail.com>: May 13 11:26AM On Sun, 12 May 2019 18:12:10 -0700, tabbypurr wrote: > One needs replacing. Sounds like a trivial job. Send it to me if you > want. Thanks for the offer, Tabs, but it's too far gone in other respects I'm sorry to say. Trust me, I hate throwing anything away so it really has to be terminal case for me to even consider junking it. -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| Cursitor Doom <curd@notformail.com>: May 13 11:31AM On Mon, 13 May 2019 20:46:03 +1000, Lucifer wrote: > I did have a one valve test oscillator which was powered by a nine volt > grid bias battery. Tust the grid alone was battery powered? Seems a bit of a strange idea. I mean, it's entirely feasible, but if you have to generate higher voltages for the anode from the mains.... -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| Lucifer <LuciferMorningstar@bigpond.com>: May 13 09:46PM +1000 On Mon, 13 May 2019 11:31:05 -0000 (UTC), Cursitor Doom >Tust the grid alone was battery powered? Seems a bit of a strange idea. I >mean, it's entirely feasible, but if you have to generate higher voltages >for the anode from the mains.... The nine volts was the anode voltage! I had a hybrid car radio with 4 valves and 2 transistors. The valves used the 12 volts for the anode voltage. Valves don't need high voltage on the anode for low power applications. |
| Lucifer <LuciferMorningstar@bigpond.com>: May 13 09:52PM +1000 On Mon, 13 May 2019 11:23:51 -0000 (UTC), Cursitor Doom >Nice find. It's amazing what gets thrown out! I dream of owning an >apartment overlooking a vast garbage tip so I can spot anything >potentially valuable being dumped. ;-) I have found so many amazing things at tips. A bag of stained glass hobby bits and pieces. Photo copiers I spent hours dismantling. Auctions are a good cheap source of what many people call junk. |
| Cursitor Doom <curd@notformail.com>: May 13 02:23PM On Mon, 13 May 2019 21:52:09 +1000, Lucifer wrote: > A bag of stained glass hobby bits and pieces. > Photo copiers I spent hours dismantling. > Auctions are a good cheap source of what many people call junk. What's worth salvaging from old photocopiers? I vaguely recall there's some exotic goodies in them somewhere. -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| Cursitor Doom <curd@notformail.com>: May 13 02:27PM On Mon, 13 May 2019 21:46:56 +1000, Lucifer wrote: > I had a hybrid car radio with 4 valves and 2 transistors. > The valves used the 12 volts for the anode voltage. > Valves don't need high voltage on the anode for low power applications. I'll have to look into that. I had no idea of such extraordinarily low plate voltages as that. 9V eh? Wow! Do you happen to remember the type number of those? I'd be fascinated to check out the data sheet for 'em. -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| Fox's Mercantile <jdangus@att.net>: May 13 09:39AM -0500 On 5/13/19 6:46 AM, Lucifer wrote: > The valves used the 12 volts for the anode voltage. > Valves don't need high voltage on the anode for low power > applications. <http://www.junkbox.com/electronics/lowvoltagetubes.shtml> -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| Ralph Mowery <rmowery28146@earthlink.net>: May 13 10:57AM -0400 In article <qbbusf$p45$2@dont-email.me>, curd@notformail.com says... > I'll have to look into that. I had no idea of such extraordinarily low > plate voltages as that. 9V eh? Wow! Do you happen to remember the type > number of those? I'd be fascinated to check out the data sheet for 'em. At one time the car radios had low voltage tubes in them that just ran on 12 volts . They could not supply the power for the audio output, so a transisitor or two were used in the audio stages. Tubes worked well for the radio frequency signals and transistors not so well in those years. Back in the eairly 1960's I built a one tube receiver for the airplanes that ran on 12 volts only. Plans were in a Popular Electronics of the same years. Had to use earphones for it. |
| Wond <gboot.phil@gmx.com>: May 13 03:21PM On Mon, 13 May 2019 14:23:35 +0000, Cursitor Doom wrote: >> Auctions are a good cheap source of what many people call junk. > What's worth salvaging from old photocopiers? I vaguely recall there's > some exotic goodies in them somewhere. In a good copier, there's an excellent lens, for a start. |
| Cursitor Doom <curd@notformail.com>: May 13 03:49PM On Mon, 13 May 2019 10:57:54 -0400, Ralph Mowery wrote: > Back in the eairly 1960's I built a one tube receiver for the airplanes > that ran on 12 volts only. Plans were in a Popular Electronics of the > same years. Had to use earphones for it. Those awful high impedance ones, by any chance? -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| Cursitor Doom <curd@notformail.com>: May 13 03:50PM On Mon, 13 May 2019 09:39:11 -0500, Fox's Mercantile wrote: > <http://www.junkbox.com/electronics/lowvoltagetubes.shtml> Thanks! |
| Ralph Mowery <rmowery28146@earthlink.net>: May 13 12:25PM -0400 In article <qbc3mj$p45$3@dont-email.me>, curd@notformail.com says... > Those awful high impedance ones, by any chance? Some of the older ones that were around 1000 ohms or more impedance phones. The lower ones would not work. |
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