Wandersound Stereo Interference

[Leroy Eckert]

Thanks Bob:
Other than a loose connection at the equalizer created from moving wires around
as Dick H suggested you may have found the answer. Here is why, perhaps.
I could not find a pre-made harness at Radio Shack which went from S Video to a
standard push in video connector like plugs into the back of a TV. (yellow
connector) I wired about 2 feet of harness using 20 gauge wires, ground, video
and power to complete the installation. These wires are wound together without
shielding. I'm now wondering if the power wire is affecting the video signal?
I'll check it out this weekend. The problem occurred in the 92.4----92.7 FM
range. I didn't write it down at the time simply because I don't know what I am
doing on these things until after the fact. lol
Thanks for the input.

Leroy Eckert
1990 WB-40 "Smoke N Mirrors"
Niceville, FL



----- Original Message -----
From: one_dusty_hoot
To: WanderlodgeForum@yahoogroups.com
Sent: Sunday, May 20, 2007 11:10 AM
Subject: [WanderlodgeForum] Re: Wandersound Stereo Interference


Not a frequency guru but will give you some things to try.
Matter-of-fact not a guru of anything.

1.) You know for certain that the WS is affected by turning
on the cameras. How about turning on the other way, first
the cameras then the WS, Problem persists-No problem?

2.)For best results signal wires should cross (+) at a 90º,
not laid along side one another. Also, the grounds around
the two conductors are beneficial when there is a good
ground. Use an ohmmeter, on the lowest scale X1, check
resistance on the shell of the S-Video plug to a GOOD,
NO! GREAT ground. (Fabulous will work ~(;>))

3.)With WS on, disconnect one camera S-Video at the
camera, turn camera on and off several times to see if WS
is affected. If not, replace S-Video on this camera, repeat
the process on the other. One or the other may be the cause,
just narrowing down the source.

4.)The problem may in fact not be related to the S-Video but
to a momentary drop in supply voltage as the camera is turned
on.( Usually spikes are caused by the inductive kick of a coil
radiating and induced into an adjoining conductor, I don't know
of but perhaps there is such a coil in the system?) A voltage
drop may not be seen on a meter. You would have better results
getting the supply voltage (12V) from another location temporarily
to see if the problem persisted. A capacitor across the source
may prevent the disruption.

5.Check the voltage source wires of the WS, see if they can,
or other wires of that system be moved slightly away from
the vicinity of the camera system.

6.)Call the supplier asking if they have heard of their system
affecting other sensitive systems in motorhomes.

S-Video is nothing more than (2) twisted pairs of wires
commonly used for brightness and color.Each signal
wire is twisted with a ground wire and includes a sparsely
wrapped ground foil on the outside. A better S-Video
cable may end the problem if in that area, this one with
better shielding and plugs for example.
http://www.bluejeanscable.com/store/svideo/index.htm
Bob Janes, Greenville
--- In WanderlodgeForum@yahoogroups.com, "jwasnewski"
wrote:
>
> I recently completed the installation of new rear and side cameras.
> They work well even at night. I used the same on/off switch and
> constant voltage power supply as the old camera system. All wiring
> after the power supply is new 20 gauge wire fused with 2amp fast
blow
> CMA(??) type from Radio Shack as per instuctions.. I installed two
3.5
> LCD monitors using the same video cable as the old camera on the
rear
> camera. I used the cable that came with the side camera, 4
conductor S
> Video. I noticed this morning that my Wandersound stereo signal
gets
> knocked off line with ensuing static when I turn on the cameras.
> Any frequency guru's out there? Any ideas? The TV's are not
affected.
> No interference before the retrofit. I did not see any capacitors???
in
> the power lines of the old system.
>
> Leroy Eckert
> 1990 WB-40"Smoke N Mirrors"
> Niceville, FL
> At Salt Springs Resort, Ocala National Forest
>





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