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| Railroad signal or cab signaling Vacuum Tubes https://www.rypn.org/forums/viewtopic.php?f=1&t=39576 |
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| Author: | Pegasuspinto [ Tue Jul 12, 2016 11:09 pm ] |
| Post subject: | Railroad signal or cab signaling Vacuum Tubes |
Someone somewhere may have a old tube type cab signal system that needs these. Probably rare as hen teeth but still overpriced, these were made as US&S OEM parts it appears. http://www.ebay.com/itm/New-TungSol-USS308-Black-Plate-Triode-Vacuum-Tube-/151549575913 I have no connection to the seller, I just happened to 'trip' over this listing. |
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| Author: | dinwitty [ Wed Jul 13, 2016 7:22 pm ] |
| Post subject: | Re: Railroad signal or cab signaling Vacuum Tubes |
I'm trying to think what systems would use a Nixie tube like display, most early systems showed separate position light signal displays back lit from a light. |
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| Author: | Pegasuspinto [ Wed Jul 13, 2016 8:59 pm ] |
| Post subject: | Re: Railroad signal or cab signaling Vacuum Tubes |
These are not nixes, they are amplification triodes. Their application seems to be to pick up what was a very weak signal from the tracks and amplify it to a usable level. |
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