[GreenKeys] Morkrum Kleinschmidt CPR Wheatstone Relay 1-A

[Paul Wills]

Nice!  It's used for deriving a full duplex telegraph circuit on one wire.

PDW



----- Original Message ----- 
From: "Eugene Hertz" <eugene_hertz@yahoo.com>
To: <greenkeys@mailman.qth.net>
Sent: Thursday, March 11, 2004 7:43 PM
Subject: [GreenKeys] Morkrum Kleinschmidt CPR Wheatstone Relay 1-A


> Here's a neat ol' thingy!  What was it used for?
> 
> <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2231721404>
> 
> item=2231721404
>