MLU FORUM - Mystery unit

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- The Wireless Forum (http://www.mapleleafup.net/forums/forumdisplay.php?f=29)

- - Mystery unit (http://www.mapleleafup.net/forums/showthread.php?t=22753)

What wireless set is this unit used with?

It looks like a power supply of some sort. The 3 pin sockets look like 11 set .

Can you post another, larger picture ? We cannot read the plate on it Mike

Quote:

Originally Posted by cletrac (Post 201373)

What wireless set is this unit used with?

None.

It's "Unit, Signalling, V.F., No.3 Mk.II (YB/YA.3814) or Mk.III (YB.02227)" and converts low frequency signalling currents (i.e: magneto ringing) into 500Hz interrupted at the signalling frequency (and vice versa).

It's used for signalling over a repeatered audio frequency or carrier telephony circuit, and is inserted at the 2-wire audio portion (i.e: the local and remote ends).

Someone has removed the data plate from top left, and it's missing the outer wooden case that has a circuit diagram screwed to the lid.

Chris.