Seller:churrolady✉️(3,122)99.4%,
Location:New Berlin, Wisconsin, US,
Ships to: US & many other countries,
Item:126225943396Rare POTTER & BRUMFIELD Hermetically Sealed,14-pin 4PDT Plug-In Relay, # MH-5516. It was left behind in the electronic components inventory of my late father. The MH Series was used for many years in airborne computers. Specifications : The following information is taken fromPotter & Brumfield. For sale is your choice of a rare
vintage POTTER & BRUMFIELD hermetically sealed 4PDT Plug-in Relay, #
MH 5516. It was left behind in the electronic components inventory of
my late father. He was an Army Signal Corps Radio School instructor
during the War, was an active and avid HAM radio operator for over 70
years, and was a radio and other electronics serviceman for much of his
life. (I would guess that these are government surplus.) His
components were stored in a dry, smoke-free home. I
do not know if these are new old stock, scuffed from moving around in
the cabinet, or if they were used. My husband knows relays from his
work with Allen-Bradley relays, so he tested and researched these relays
for me. This is what he found: Hermetically
sealed, 14-pin, 4-pole, double throw, plug-in relay with locator pin.
(The circle symbol for the locator pin is wearing off on #2.) Specifications : The following information is taken from Potter & Brumfield Catalog 66, for Industrial and Aerospace Military Relays:
Potter and Brumfield's MH Series was a versatile, miniature
telephone-type relay designed for reliability, where minimal space and
weight were important design considerations. The MH Series was used
for many years in airborne computers. Power: DC: 110 VDC maximum. 4 watts max. AC: 240 VAC maximum on intermittent duty only. Breakdown at 500 volts rms. Maximum 4.6 VA Contacts: 1/8 inch diameter gold-flashed silver. Rated for 5 amps at 120 volts 60 Hz. Mechanical Life: Minimum 10 million cycles. Condition :
As found, as is, as photographed. Relays exhibit age-related wear
from handling and storage (see photographs). Seller does not know if
the relays are used or new old stock. Coil has about 9,000-ohm
resistance; and the Normally Closed (NC) contacts all exhibit
continuity. Seller did not apply electrical power to the relays. I
hope that one or both of these relays would be just the thing you were
looking for to finish your vintage electronics project! Or, I hope
that you would just like to have it for YOUR electronics components
inventory!! If you have a choice of either #1 or #2, please let me know. Otherwise, I will choose one to send. If you would like both, I will send the second one free of additional shipping charge. Put the items in My Cart, request a total, and don't pay until I send you a revised invoice. Thanks for looking here! (Misc 7)
Condition:Used
Condition:These were left behind in the electronics components inventory of my late father, who was a radio and other electronics serviceman for much of his life. They may be new old stock, but I have no way to tell. (The marker pin symbol is wearing off on #2.) They were stored in a dry, smoke-free cabinet. Tested.