Thanks Dale. In this case, we moved and gave them their unit back. I'm likely
to get new products from them in a month or so when we move into the new house
although I really am not looking forward to their bill again.
tnx
Mike / W5JR
On Aug 27, 2013, at 12:37 AM, Dale <svetanoff@earthlink.net> wrote:
> Mike,
>
> It sounds to me like the manufacturer of the switcher wall wart bothered to
> put RFI suppression on only 1 side of the line, rather than both sides. I'll
> also guess that there is no line-to-line cap in it, either, on the wall plug
> end. If that is true, I guess that is only half as bad as omitting all RFI
> suppression components, as some makers are prone to do.
>
> 73, Dale
> WA9ENA
>
>
> -----Original Message-----
>> From: "W5JR.Mike" <w5jr.mike@gmail.com>
>> Sent: Aug 26, 2013 2:43 PM
>> To: "jim@audiosystemsgroup.com" <jim@audiosystemsgroup.com>
>> Cc: "rfi@contesting.com" <rfi@contesting.com>
>> Subject: Re: [RFI] Recent RFI status - Direct TV and Dish?
>>
>> I agree with Jim to watch out for the switcher power supplies. My own
>> experience with a Comcast unit replaced over the summer was noticed to be
>> quite ugly on 160m later in the fall when my focus turned back to TopBand. I
>> could easily trace the electrical wiring in our walls with my AM radio
>> looking for the source. Unplugged the very tiny wall wart and all was quiet.
>> I plugged it back in after the contest and found flipping it 180* was quiet,
>> but as originally plugged in was noisy. My outlet indicated proper wiring
>> from one of the usual plug-in checkers. I left it plugged in the "quiet"
>> way.
>>
>> tnx
>> Mike / W5JR
>>
>> On Aug 26, 2013, at 3:23 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>>
>>> On 8/26/2013 11:33 AM, Tim Duffy wrote:
>>>> Also, how about RFI problems associated with nearby transmitting antennas
>>>> that might cause RFI overload problems to the Dish or Direct TV systems -
>>>> as in TVI?
>>>
>>> I would expect any issues to be the result of 1) noisy switching power
>>> supplies, 2) noise from the downlink electronics, and 3) common mode
>>> coupling on the coax (both TX and RX). and I would expect them to be
>>> easily solved by winding turns around ferrite cores. I had DirecTV in
>>> Chicago, and never had any issues, with antennas and DirecTV downlead in
>>> close proximity (5-25 ft). I don't remember if I did anything with chokes.
>>>
>>> 73, Jim K9YC
>>> _______________________________________________
>>> RFI mailing list
>>> RFI@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>> _______________________________________________
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>
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