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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 10th Jul 2024, 8:46 pm   #21
kalee20
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Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
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Default Re: Mercury Relays - help needed

Mercury-wetted relays can give an astonishingly fast rise or fall time to a level change - almost sub-nanosecond if appropriately coupled to a coax cable or transmission line. They can't switch at more than 100Hz (and that's really pushing it!) but the bounce-free transition is in a league of its own.
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Old 11th Jul 2024, 4:52 am   #22
TonyDuell
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Default Re: Mercury Relays - help needed

There was a Tektronix test plugin unit for the 500 series 'scopes that used a mercury wetted relay run off the AC heater supply (maybe half-wave rectified, I forget) to send fast rise time pluses into the main 'scope Y amplifier.

Smaller mercury relays were used on teleprinter lines up to at least 200 baud.
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