[GreenKeys] eBay # 5712028690: Morkrum Wheatstone Relays

[Wayne Letourneau]

gil
I do have a couple pages of info on them along with schematic, the info is
found on pages 67-69 of  "The New RTTY Handbookk" printed in 1962
----- Original Message ----- 
From: "gil smith" <gil at vauxelectronics.com>
To: <greenkeys at mailman.qth.net>
Sent: Wednesday, July 28, 2004 11:18 AM
Subject: Re: [GreenKeys] eBay # 5712028690: Morkrum Wheatstone Relays


> Hi folks:
>
> As Wayne pointed out, you don't see these often.  This auction is for two
> "Wheatstone Relay 1-B" units, with a Morkrum label.
>
> I have an almost identical unit that is a "Wheatstone Relay 1-A," with a
> Morkrum-Kleinschmidt label.  The relays look the same, but the base is
> different.  It is interesting that a 1-A model would come after the MK
> merger, and a 1-B model before.  The label on mine also says
> "C.P.R.CO."  -- does anyone know what that stands for?
>
> Does anyone have any info on these relays?  I'd guess they are polar line
> relays, but I am not certain.  The contact assembly looks much like a
255-A
> polar relay, but the contacts move over a much larger distance, so speed
> would be slower I'd guess.  It has very nice brass machining, and is a
> cool-looking unit, suitable for display.
>
> gil
>
>
> At 05:57 AM 7/28/2004, eBay Member: wb0cte wrote:
> >don't see thease very often.
> >wayne  wb0cte
> >
> >Title of item:       Morkrum RTTY Teletype Telegraphy Kleinschmidt Radio
Ham
> >Seller:              dsm-pgh
> >Starts:              Jul-26-04 19:06:51 PDT
> >Ends:                Aug-02-04 19:06:51 PDT
> >Price:               Starts at $89.00
> >
> >To bid on the item, go to:
>
>http://cgi3.ebay.com/aw-cgi/eBayISAPI.dll?RedirectEnter&partner=777701&loc=
http%3A%2F%2Fcgi%2Eebay%2Ecom%2Fws%2FeBayISAPI%2Edll%3FViewItem%26item%3D571
2028690%26category%3D4671%26ssPageName%3DADME%3AB%3AEF%3AUS%3A1
> >
> >
> >Item Description:
> >See photos. Thi auction is for the two Morkrum Wheatstone Relay 1-B
shown.
> >I believe these were used in very early telegraphy or teletype or ticker
> >tape systems.These are precision instruments mostly made of brass. The
> >glass top flips up to reveal the indicator. Inside the vertical tube is
> >the relay mechanism as shown in one of the photos. The knob on the side
> >has a brass plate above it that says "&lt;-- Spacing&nbsp;&nbsp; Marking
> >--&gt;". There are 7 connections around the wooden base, each labeled
with
> >a single letter: D, D, U, U, S, T and M. These relays seem to be in
> >excellent condition but I have not tested them in any way. Note that only
> >one has the name plate which says "Wheatstone Relay 1-B Morkrum Co.
> >Chicago". The name plate is missing from the other one. But these relays
> >are identical. Untested. As-is. No reserve. USA buyer pays $12 mailing
> >cost. International buyer pays actual shipping cost. PayPal is best.
> >Otherwise personal check or money order. Check my feedb!
> >ack.
> >
> >
> >
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> >
> >
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> >
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