mwhouston Posted March 22 Share Posted March 22 On the thread “Show us your tubes” it was suggested that if they weren't “your” tubes you couldn’t post them. Here you can. Any images of tubes, rare, strange or common, feel free to make a post. I’ll start. 2 1 Link to comment Share on other sites More sharing options...
mwhouston Posted March 22 Author Share Posted March 22 More. 3 Link to comment Share on other sites More sharing options...
mwhouston Posted March 23 Author Share Posted March 23 Tubes 1 Link to comment Share on other sites More sharing options...
ehtcom Posted March 24 Share Posted March 24 On 23/03/2023 at 12:15 AM, mwhouston said: On the thread “Show us your tubes” it was suggested that if they weren't “your” tubes you couldn’t post them. Here you can. Any images of tubes, rare, strange or common, feel free to make a post. I’ll start. Pretty sure I have one or two of those. Link to comment Share on other sites More sharing options...
mwhouston Posted March 24 Author Share Posted March 24 (edited) We all want more. Edited March 24 by mwhouston 2 Link to comment Share on other sites More sharing options...
mwhouston Posted March 25 Author Share Posted March 25 and then… 4 Link to comment Share on other sites More sharing options...
mwhouston Posted March 27 Author Share Posted March 27 Wide selection. 2 Link to comment Share on other sites More sharing options...
Ian McP Posted March 27 Share Posted March 27 On 23/03/2023 at 12:15 AM, mwhouston said: On the thread “Show us your tubes” it was suggested that if they weren't “your” tubes you couldn’t post them. Here you can. Any images of tubes, rare, strange or common, feel free to make a post. I’ll start. my gallery of tubes: 100TH in there. the big one? Industrial X Ray tube used for weld defect detection, made by Telefunken, water cooled base, operating voltage 300kV next to it a vintage power triode, a complement of 18 once used in a 1940's vintage 10kW RF furnace. second from right a 500W reflector light globe, pre halogen! 2 Link to comment Share on other sites More sharing options...
EddieT Posted April 1 Share Posted April 1 On 27/3/2023 at 1:37 PM, mwhouston said: Wide selection. GREAT SHOTS is Tesla the old JJ Valve Factory? :-) Link to comment Share on other sites More sharing options...
mwhouston Posted April 1 Author Share Posted April 1 New and blue. 3 Link to comment Share on other sites More sharing options...
mwhouston Posted April 4 Author Share Posted April 4 Early tubes. 1 Link to comment Share on other sites More sharing options...
mwhouston Posted April 5 Author Share Posted April 5 Oldies. 1 Link to comment Share on other sites More sharing options...
Nick44 Posted April 5 Share Posted April 5 On 01/04/2023 at 5:59 PM, mwhouston said: New and blue. Out of interest are they the fabled old xf2/3 Mullards? 2 Link to comment Share on other sites More sharing options...
mwhouston Posted April 5 Author Share Posted April 5 3 hours ago, Nick44 said: Out of interest are they the fabled old xf2/3 Mullards? No idea off FB. Link to comment Share on other sites More sharing options...
mwhouston Posted April 5 Author Share Posted April 5 Duo. 1 Link to comment Share on other sites More sharing options...
Peter B L Posted April 8 Share Posted April 8 (edited) 6L6 Sovtek matched quads. 6.5 watts single ended audio duty, 19 watts push pull. 813 70 watts single ended, 125 watts push pull (AF class AB1), 210 watts Push pull (RF class C). 6146 transmitting tetrodes. 148 watts (RF Class C), 35 watts single ended ,(AF), 120 watts (push pull class AB1 AF). KT88, British old school, 42 watts single ended, 100 watts push pull class AB1. VT4C. Heres a rare one. Triode, needs 10 volts at 3.125 amps DC on the filament, and can give 75 watts single ended (AF), 100 watts Class C (RF), and nearly 300 watts class AB1 (AF). I think I have its matched twin somewhere as well. Don't even think what they are worth !! VT104, 115 watts single ended class C (RF), AF data unavailable, but with a quite high plate impedance and low input impedance, they would make a great guitar amplifier, probably around 300 watts in Class AB1. I also have the matched pair of this tube as well. Hope you enjoyed these blasts fro the past, they heyday of valves and things that glow in the dark ! Especially the VT4C, its classed as a bright emitter, and could literally light up a large room just with filament power alone ! Edited April 8 by Peter B L 2 1 Link to comment Share on other sites More sharing options...
mwhouston Posted April 9 Author Share Posted April 9 Lodda toobs. 2 1 Link to comment Share on other sites More sharing options...
mwhouston Posted April 15 Author Share Posted April 15 https://www.radiomuseum.org/tubecollection/robert_gillespie.html Link to comment Share on other sites More sharing options...
daviddsailor Posted April 15 Share Posted April 15 Guess what. I've had it for about 50 years. 1 1 Link to comment Share on other sites More sharing options...
Peter B L Posted April 15 Share Posted April 15 Its an image orthotron, used for TV cameras. Link to comment Share on other sites More sharing options...
daviddsailor Posted April 15 Share Posted April 15 Correct. It's a 3" image orthicon, type OS 20 H by an unknown (to me) manufacturer. In a monochrome camera they used one tube. In a colour camera they used several tubes, Probably one for each primary colour and one for luminance. 1 Link to comment Share on other sites More sharing options...
Peter B L Posted April 16 Share Posted April 16 Only 3 tubes were used in color, the luminance was derived from the average cathode current in all 3 tubes, and then DC corrected for color balance. As you can imagine, setting up the lenses for such a camera was a very time consuming process. I think that's the early SOVTEK brand, although RCA produced these tubes under license for many manufactures during the 50's and 60's. 1 1 Link to comment Share on other sites More sharing options...
mwhouston Posted April 18 Author Share Posted April 18 More…. Link to comment Share on other sites More sharing options...
Peter B L Posted April 18 Share Posted April 18 They certainly aren't making them any more, look after them as a heritage for future generations. Unlike transistors and IC'S, they don't suffer from solid diffusion and failure after many years, as long as they don't out gas internally, or lose the vacuum, they will still work in 1,000 years. 1 Link to comment Share on other sites More sharing options...
mwhouston Posted April 18 Author Share Posted April 18 11 minutes ago, Peter B L said: They certainly aren't making them any more, look after them as a heritage for future generations. Unlike transistors and IC'S, they don't suffer from solid diffusion and failure after many years, as long as they don't out gas internally, or lose the vacuum, they will still work in 1,000 years. Not mine, off FB. Link to comment Share on other sites More sharing options...
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