I have a C.P. Clare sealed octal-base relay, 1960s vintage that I might have a use for. Coil is shown as pins 7 & 8, but no voltage given. Part No. is HG2A1016.
Any help would be appreciated.
TIA!
Cap'n John
power it up on a variable power supply. see what voltage it kicks in at , then add, say, 20%
martin
First, it's sealed because it's a mercury relay (very reliable, might need to be mounted right-side-up).
My '70s catalog lists
HG2A1015 as a 1250 ohm/22 mA coil unit, with must-operate at 30V, nominal coil voltage 71V
HG2A1002 as 140 ohm/67 mA coil, with must-operate at 10V, nominal coil voltage 24V
HG2A1001 as 5000 ohm/11 mA coil, with must-operate at 62V, nominal coil voltage 142
"HG2" means it's mercury double-pole switching. It looks like the pattern is that the coil R*I**2 = constant, so you can use an ohmmeter to figure it out.
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I think that will be well on the low side of nominal voltage, but if it works consistently, ok. Anyhow, just wanted to point out that the HG part of the part number probably stands for mercury-wetted contacts, if it follows the nomenclature of more-recent Clare relays.
-- -jiw
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