NC-300 Mystery Mod

[Hue Miller]

----- Original Message -----
From: Paul Hendershott <pjhend at AMERITECH.NET>
To: <BOATANCHORS at LISTSERV.TEMPE.GOV>
Sent: Friday, September 07, 2001 3:45 PM
Subject: NC-300 Mystery Mod


> I received a crystal calibrator model # XCU-300 the other day. This
goes
> with the NC-300 receiver. This one appears to have a modification.
I
> downloaded the manual &
> schematic and it shows the XCU-300 with 1 6AK6 tube which matches
what
> is currently installed in my NC-300 (appears home-brewed). The New
> XCU-300 (factory stamped)
> has some sort of MOD (smaller metal case bolted to factory unit)
which
> includes 1 - 12AT7 tube and 2 adjustable coils peaking out of the
case.
> Has anyone seen this MOD
> before? Any ideas what it is for?

--My guess- 12AT7 to divide down calibrator signal to 10 kHz for more
calibration points. Altho the  fact that there's 2 coils instead of 1
makes
me not want to  bet any money on my guess.
Hue Miller

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