[Milsurplus] Northern Radio pics found

Sat, 14 Feb 2004 15:25:04 +1300

I have a Northern Radio 107 FSK converter here- and a copy of the manual.
The address on the manual (I suspect this is also on the name plate on the
107 itself but can't verify this at present) is-

Northern Radio Company (Inc)
143-145 West 22nd Street
New York 11    N. Y.

Good converter for it's time- all tubes -but heavy!  Dual channel
(diversity) type and has a tube magnet driver using a pair of 6L6s,
switchable to polar or neutral. Mine has had the original magnet driver
hacked about but otherwise original. There's another 107 across town in
storage too.(not mine) These two 107s were used a long time ago in the old
NZPO radio receiving station at Makara near Wellington.
The knob with the handle in the middle at the bottom of the 107 (see url
below in Tom's post) is to set the shift by varying inductance in one of the
tuned ccts in the the discriminator. All x2 of course as there's two signal
paths thru the two discriminators to the diversity combiner.  Scope used an
oddball type of display, almost like an eye pattern, to tune correctly.
73
 Dave, ZL3FJ

----- Original Message ----- 
From: "Tom Norris" <[email protected]>
To: <[email protected]>
Sent: Saturday, February 14, 2004 2:33 PM
Subject: [Milsurplus] Northern Radio pics found

> Aha, here is a pic of some Northern Radio gear on Jerry Proc's HAIDA
> page -- http://webhome.idirect.com/~jproc/rrp/rattbay.html
>
>
> Tom
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