Jameco continues to sell linear wall warts, if you want them new.
best wishes,
Nick
VE7DXR
At 05:26 24-10-14, you wrote:
On 10/23/2014 3:33 PM, JC wrote:
So watch out is you have Comcast cable modem, it is necessary to choke the
cable and the AC cord with FT240 # 31. With this fix ,the noise dropped from
s8 to s0 but still audible at Doug receiver.
By now this should be "Ham Radio 101" -- that is, assume that
EVERYTHING with a digital clock, and EVERY switching power supply is
a noise source, and be prepared to choke them using my RFI tutorial
as a starting point. It's also a VERY good move to replace all
switching power supplies with a linear supply, or even a linear
supply float charging a battery. I'm doing exactly that with cable
modem, WiFi Router, CATV box, Internet "radio," etc. In most cities,
it's possible to find linear wall warts at second hand stores for a
buck or less, and I also buy them at ham flea markets.
And all the gear in my shack (except for computers and power amp),
run off my small solar system.
73, Jim K9YC
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