[Boatanchors] maybe a relay?

[Ray]

Ok you all have hit the nail on the head.  All your answers match what I have.  It does indeed open by turning the cover and it matches the relay pictured that is at   http://www.prc68.com/I/Telegraph.shtml#255A that David Ross and others pointed too\

what a group
Thanks all

 

From: WA5CAB at cs.com 
Sent: Monday, March 28, 2011 9:40 PM
To: jwiley at alaska.net ; bluegrassdakine at hotmail.com 
Cc: boatanchors at mailman.qth.net 
Subject: Re: [Boatanchors] maybe a relay?

If it is a 255A Polar Relay, the top comes off by turning it CCW and then lifting.

4 TRY 30 is not a Signal Corps Stock Number.  Syntax is totally wrong.  Sig Stk Nr's are all of the general format NXNNN , NXNNNN or NXXNNNN, often followed by other characters.  There are no spaces between the characters.

In a message dated 3/28/2011 8:26:12 PM Central Daylight Time, jwiley at alaska.net writes: 

  It _might_ be a polar relay for teletype use.  The number is right, or 
  close to right.  WECO made polar relays with an 8-pin base, and about 
  that size.  Are you _sure_ it is sealed?  Polar relays required 
  adjustment from time to time.  It could also be a solid-state version of 
  the 255 that was designed as a plug-in replacement.  In that case,  it 
  may not have needed adjustment.


  - Jim, KL7CC


  Ray wrote:
  >I have a black sealed vertical mount item, 3 in diameter, and 6Inches high. 
  >It is a plugin with 8 pins  (2 rows of 4).
  >
  >It is manuf by Kurman Electric Co. Inc.  Manuf part number P255A and it also 
  >is marked
  >Signal Corps Stock number 4 TRY 30
  >
  >anyone have any ideas?   a web search did not help with the part number but 
  >yielded a few hits on the company but no Joy
  >
  >Ray 
  >



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