Mastodawn

This is a project for @mediaarchaeologylab consisting of a Webster model 2501 intercom system made in 1946. The remotes are just a speaker, that serves as a microphone if you close a PTT switch. The main system has a rectifier tube, a cooked ripple capacitor, and some amp tubes. I've figured out how to rewire the remotes so they match and hopefully work, and blown and picked massive wads of fluff out of them. One remote needs a new backplate fabricated.

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sb the chippy-choppy 1d ago

@smellsofbikes @mediaarchaeologylab
Very cool! What's the voltage like on the speaker lines?

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smells of bikes 1d ago

@sb I don't know yet because I haven't gotten the base unit running, and there are as far as I can tell zero references to this specific model anywhere online. Other similar models ran 100VDC in the main station. I hope they didn't run that out to the speakers.

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sb the chippy-choppy 1d ago

@smellsofbikes
It looks like a fairly standard 70v setup. I still maintain one at work that's "halfway between your system and now" years old.

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smells of bikes

@sb ooooooh that's neat! It's cool you have a working one. Do you know what the speaker voltage is on yours? I have no wiring for that so I have to figure out what to use.