[Boatanchors] maybe a relay?

[WA5CAB at cs.com]

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 
> >
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480