A brute force line filter for the power line. In older versions of the ARRL
handbook a circuit was published for years which was simple to build in an
evening. I built and used them with early computers....which were massively
sensitive to power line noise ! Worked very effectively.
If you don't have an old handbook I bet someone here does and can offer a
scan of the page with the circuit. It had two choke coils that you wind,
and 5 or 6 common capacitors, as I recall it.
73 de Gary, AA2IZ
----- Original Message -----
From: "Kris Merschrod" <Kris@merschrod.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Wednesday, February 03, 2010 2:23 PM
Subject: [TenTec] High speed washer hum/whine
> Good afternoon all,
>
> Here is a powersupply problem that needs a neat fix.
>
> When my wife runs the highspeed washing machine, the whine and hum goes up
> and down and also off and on when I am on my trusty Delta II. The power
> supply is the # 936. Grounding all around.
>
> When I run my old Drake, with AC-4 power supply - theer isn't a hum or
> whine. (My gues would be the L-C filters on both neg and pos AC Lines.
>
> Suggestions Please.
>
> Kris KA2OIG
> Merschrod
> 123 Warren Road
> Ithaca, NY 14850
> www.merschrod.net
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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