Jim Brown wrote:
...snip...
> Unless 1) our labor is worth only a few pennies per hour or 2) you want to
> reinvent the
> wheel, or 3) you want to turn this into a science project, I STRONGLY suggest
> that you
> proceed as follows. 1) STUDY the Fair-Rite catalog. 2) Choose the parts that
> will do you
> job.
Ah the rub! Just exactly what job is it that I need done? Do I need 30 ohms?
60 ohms? 300 ohms? 3K ohms? What measurements do I need to make to determine
what is needed? Just exactly what is it that one is supposed to 'study' in the
catalog? Although I have not looked yet, the Fair-Rite catalog, to my
knowledge, does not have a chart called "Number of split beads needed to
suppress a noisy COP on a Toyota V8." Sorry to sound sarcastic here, but the
notion of what is adequate for suppression is somewhat illusive to me. Even a
hip shot guess from somebody who has done this before would be great. 1 bead or
10 beads per COP?
New plan... I split a 1/2" OD toroid, wound 8 turns on each 1/2, and mounted
this in a plastic clothes pin (glued in). I'm going to attempt to look at each
of the 4 wires running to the COP with an O'Scope using this nifty little
clothes pin RF sniffer gismo I made. (It might even work for looking at
current on my Topband radials too) Maybe I can isolate which of the 4 lines
running to the COP is doing the radiating by looking at them one at a time. I
could also look at this in the frequency domain with my spectrum analyzer. But
I still do not understand how I will equate my measurements to what "parts that
will do you the job" (your #2 recommendation above).
> 3) Do a search for distributors on their website, and ask for a quote on some
> reasonable quantity (20-50 is a good start). I strongly suspect you will be
> quite surprised at
> how cheap they are when you don't try to buy onesey-twosey. And if you have
> chosen the
> parts well, you will find lots of other uses for them both in your own home
> and those of your
> friends.
>
>
> Jim Brown K9YC
I can tell you this, if you have a product you want to introduce and start
selling, most manufacturers will send you sample lots of double the number you
indicated (read FREE). If you are just a one time buyer, they send you to
distributors. $1.20 to $1.70 each, depending on size and mix.
Thanks for the input.
Ford-N0FP
ford@cmgate.com
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