[Johnson] Viking Invader need some ideas

[Ray V.]

Hi Joe,

One way or another, you do want to maintain the shielding integrity on 
that wire.

First, you can purchase shielded audio cable with one, two or more inner 
conductors and just use that. To make it look original just strip off 
the outer insulation so the shield is fully exposed. However if you do 
want to remove the outer insulation, make sure it is woven shield (like 
coax) , not twisted shield. Much of the audio cable is twisted and 
doesn't adapt itself to having the outer insulation cover removed, plus 
it just doesn't look "right".

However I've found the shielding on even woven audio cable just doesn't 
look "right", the shield wires are just too "fine" looking. To make it 
look more original, I've done the following on rigs that have needed it:

Obtain some good quality (99+% shield) coax cable with a flexible 
(stranded) inner conductor and just use that if all you need is a single 
inner conductor. The shield is "heavier" and more "robust" in appearance 
than today's audio cable version. To make it look "original" strip the 
outer insulation cover off the coax. If you want to replace the inner 
conductor with standard hookup wire, just "bunch up" the shield at one 
end and you'll be able to slid the inner coax conductor out, then slid 
in a piece of hookup wire in its place. I've done this using two pieces 
of hookup wire when it was a multi-center wire type conductor. I usually 
do this when the original wiring was cloth covered wire. I use cloth 
covered wire (AES and other suppliers) to make it almost identical to 
original.

Good luck, 73, Ray  W2EC

Joe Y wrote:

> Hello all,
> Am finally getting around to my Invader 200 and
> preparing to go through it and hopefully get it
> airworthy once again but I have a question and request
> for some info.
> Upon inspection of the rig I am noticing that Johnson
> used a shielded type cable in what at quick glance
> appears to be the speech amp section as I can see it
> is wired to the Audio Pot. This shielded cable seems
> to have broken down and has become "crispy" and falls
> apart easily and I am quite concerned about it giving
> me problems.
> Can anyone out there familiar with this rig or that
> shielded cable offer any advice on where to obtain
> this type of wire or if unshielded wire can be
> substituted?
> Also are there any other quirks with this rig I should
> beware of as I start going through it?
> Thanks for any help,
> joe
> 
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