[R-390] Gear Train in R-390/URR

[Walter Wilson]

Ron,

Here are some of the more significant differences:
1)  Remove the R-390 gear train without the green gear in place, and you'll
easily get it out of sync
2)  The R-390 slug racks do not go in order by frequency
3)  The slugs are different type/diameter for different bands
4)  The zero cal functions differently
5)  The alignment of the R-390 gear train is done at 2 000 KC, and is
aligned from marks on the back of the RF deck, which are impossible to see
with the xtal oscillator installed.  The R-390A gear train is aligned at
7+000 KC with alignment marks on the front, and the alignments can be made
without removing anything except the covers and front panel.

Walter - KK4DF

----- Original Message -----
From: "Ron H" <rnharsh@attbi.com>
To: <R-390@mailman.qth.net>
Sent: Tuesday, June 10, 2003 4:26 PM
Subject: [R-390] Gear Train in R-390/URR


> Are there any significant differences in the gear trains on the R-390 and
> the R-390A?
>
>
> Tnx
> K3PID - Ron H
>
>
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