Hi John
"The secret to keeping your strobes quiet first
and foremost is how you ground the
shield wires on the strobe
high tension feeder cabling."
I HATE YOU!!! Buying a
Whelen power supply that dosen't exhaust noise form anywhere and
everywhere. What sort of homebuilder are you? Not wanting to spend weeks
tangling with noise.
>From what I now understand, first and
foremost is choosing a power supply that is quiet. Believe it or not on
the Kunzleman, the quietiest thing about it is the high voltage output! I
am not saying that if you don't ground the high voltage shield to box
ground you won't get a little noise, but it is nothing compared to what
comes out of the box, or what gets onto the power lines and radiates into
the antenna and will get right into the cable if the cable is paralleled
to power lines.
One thing we found out, is shielded cable is a
much better antenna than twisted pair for the supply line!
We
ended getting two Kuntzleman power supplies and are mounting them at
wingtips. Makes no difference BTW if i use 12" or 25 feet of the wire
supplied by Kuntzleman for high voltage, just that if you don't ground it,
it makes a little noise and if battery runs down a little, will stop
double flashing quicker with longer high voltage run.
Fooling
last night got box to stop breaking squelch with antennaat about 4
feet, so that is fine with power supplies mounted by wingtips.
Fooling with various chokes and capacitors, got twisted pair going to
battery to only break squelch if antenna is about 12" away.
We also found that connecting the scope probe that is not
connected to the scope completly eliminates all noise in radio! Art fooled
on line a bit to figure out what is in probe, will get some more stuff to
fool with.
Don't have proper torroids or capacitors, but thus
far looks like will be able to lick RF jumping off power lines.
Bob N. from Aeroelectric sent out some filters to try out as well. Gut
feeling is they will do the trick @ 2.9 oz each.
Local IA
swears by Whelen in TC, said he has noise problems with all others. I am
gonna have to grab a plane taxing by and throw scope on it just to see,
the Kuntzleman has hash and sharp peaks. Choke we triedeliminates
all hash, sharp peaks need just a little more work.
Ron
Parigoris
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