[R-390] IF slugs

[Patrick]

The IF transformers normally require no adjustements, however, if you are 
set in adjusting them, follow the procedures outlined in "The 21st Century 
R-390A/URR technical reference" a collection of wisdom for enthusiasts, 
paragraph 6.2.7.1
As far as an adjustement tool, with a little patience, you can fashion a 
good one out of a bamboo skewer. If you narrow the shaft so that it can go 
thru the first slug, then the second slug can also be adjusted.
Be aware that the instructions for this adjustement requires that resistor 
R504 should be 560 ohms.
Again I stress that unless one of the transformers have been replaced, I 
would not adjust any of them, contrary, if any transformer has been replaced 
I would adjust all 3 of them. Back to the old proverb "if it is nor broken, 
do not mess with it"

Pat

----- Original Message ----- 
From: <N4TUA at aol.com>
To: <r-390 at mailman.qth.net>
Sent: Monday, October 10, 2005 1:51 PM
Subject: [R-390] IF slugs


> Hello Again,
> I am getting some good input on the stuck slugs and I am tending to just
> leave them alone. I would wonder though if one was going to do the fixed 
> IF
> alignment. How do you get to those bottom slugs? What type of tool do they 
> take? I
> would think the tool would be smaller than the hole in the top slug and 
> would
> go down through to adjust the bottom slug. What type of tool does it take? 
> None
> like I have that is for sure.
>
> Thanks for the help, Collin
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