[Boatanchors] EF Johnson Viking Valiant

[Rj Mattson]

Hi Brian, VE3VAW,
I'm lucky that your Valiant is open and waiting for parts.
Your description of how your band switch stops at 160m made me understand
the problem with mine.
Let me quote from the bama construction manual the part Id's.
D1 cam rides on the 160-11m band switch and is distinguished by its two
pegs.
D2 cam switches the VFO between 11m, 40m and 80/160m and has two parallel
groves.

Your D1 cam operates correctly by touching the chassis and stops the band
switch dead when you try to go passed the 160m band detent .

My D1 cam swings by the chassis by a 1mm gap and can go another 3 detents.
There is no chassis scoring to think the my cam ever did stop the switch at
160m.

Since it was factory wired, and there is no adjustment, I believe the
problem always existed.

As a cure, I think a properly placed self tapping screw on the chassis will
block the cam rotation beyond 160m ?

I am also in the process of restoring the Valiant with new electrolytic and
paper caps. A few of the carbon resistors need replacement too.

bob...w2ami


On Thu, Mar 14, 2019 at 5:53 PM brianpepperdine brianpepperdine <
brianpepperdine at sympatico.ca> wrote:

> I have a Valiant II sitting here out of the chassis, waiting for new caps
> (and hopefully nothing else major).
>
> From what I can see, the band switch 'rod' moves around and engages the
> rotating cam when at the 80 m band and then onto the 160. Moving back
> (clockwise) the cam rotates and is disengaged when moving to 40m and onto
> 20, 15 and 10, and then engaging the rotating square cam on the other side
> for 11m.
>
> I don't see any play of rotation possible past the 160m detent when moving
> the band switch know. At that time the cam seems engaged with its square
> corner resting on the piece of metal it is located next too... similarly
> for 11m. I wonder if that corner edge of the cam square is worn to the
> degree that is does no longer stop the cam. I cannot tell if it is a true
> stop on the corner edge or just appears to be since mine does stop.. but in
> theory if the corner of the cam rotating IS a stop then if it was worn by
> pressure of rotation over the years it might just rotate around....
>
> Is yours working such that if you did go 2 or three stops past the 160m
> detent would it then tune up just fine on the band position counted over
> from 160m in the opposite intended band position selection motion...showing
> that it had gone right around to the 10m position and the cam was not
> stopping the rotation after the 160m position?
>
> Brien
>
> VE3VAW Toronto
>
> ---------- Original Message ----------
> From: Rj Mattson <wn2ami at gmail.com>
> Date: March 14, 2019 at 4:25 PM
>
>
> I'm going over a factory built Valiant I with a band switch problem..
> The band switch goes 3 detents past the counter clockwise 160m position.
> It stops correctly on the clockwise 11 m position.
>
> I consider myself an above average mechanic but do not see any physical
> stud to stop past the 160m band switch position.
> I wish I had an construction manual with photos to see if it is aligned
> correctly.
> Being a factory wired unit with no soldering indication the band switch was
> ever replaced, I am perplexed.
> bob...w2ami x wn2ami 1962
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