Marshall,
What model APC are you using now? I use the APC Back-UPS ES 350 and 750 and
haven't detected any noise issues from them. My bigger noise makers have
been pc power supplies and NICs and network switch wall warts and my
contest partners laptop power supply.
73, Roger
AI7RR
On Tue, Jul 7, 2015 at 7:10 AM, <vhfcontesting-request@contesting.com>
wrote:
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> Today's Topics:
>
> 1. UPS with no radio noise??? (Marshall-K5QE)
> 2. Re: UPS with no radio noise??? (Zack Widup)
> 3. Re: UPS with no radio noise??? (Mike (KA5CVH) Urich)
> 4. Re: UPS with no radio noise??? (RT Clay)
> 5. Re: UPS with no radio noise??? (Buddy Morgan)
> 6. Re: UPS with no radio noise??? (ejkkjh@gmail.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 06 Jul 2015 23:14:08 -0500
> From: Marshall-K5QE <k5qe@k5qe.com>
> To: VHF Contesting <vhfcontesting@contesting.com>
> Subject: [VHFcontesting] UPS with no radio noise???
> Message-ID: <559B5210.9020102@k5qe.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Hello everyone....I got an MFJ-856(power line noise detector) assembled
> today and was preparing to go outside and look for all the nasty power
> line noise that we have. I happened to wave it around the shack and I
> found some strong noise.....tracing it down, we found that all of our
> APC UPS systems(except one) were emitting a boatload of RF crap!!
>
> We also found a simple power strip that was radiating like crazy. How
> can a simple power strip produce loads of RF junk??? Beats me.
>
> So, now I need to replace all my UPS units with something that does not
> make noise. I have asked a salesman type person and they don't have a
> clue about RF noise. None of the UPS units seem to pay any attention to
> that...it certainly is not part of their specs.
>
> Does anyone know of a brand / model of UPS that does not emit a bunch of
> RFI?? I don't need a huge UPS for each station, but I need something
> that is quiet. AFTER we fix the noise in-house, we will go outside and
> start with the noise that is coming in on the antennas. I know that I
> have a bunch of power line noise too, but I need to have a clean house
> before I start with the power company.
>
> I also want to find some power cords, like those on computers and
> monitors, that have the built in noise suppressors. I don't know where
> to order those from either.
>
> Thanks for any advice / recommendations. If anyone works in that world
> I would really appreciate hearing from them.
>
> I hope to get these UPS units replaced before the CQ WW VHF
> contest......by the way, I will be looking for everyone on 6M and 2M in
> the CQ contest....18 and 19 July....
>
> 73 Marshall K5QE
> Phone is 409-787-3830 if you want to talk.....
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 6 Jul 2015 23:44:20 -0500
> From: Zack Widup <w9sz.zack@gmail.com>
> To: VHF Contesting Reflector <vhfcontesting@contesting.com>, VHF
> REFLECTOR <vhf@w6yx.stanford.edu>
> Subject: Re: [VHFcontesting] UPS with no radio noise???
> Message-ID:
> <
> CANJxhWgVHFC1VJr6do67svR9nhpVrjsqsSh+5FzXdBm06aE3Gg@mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Hazarding a guess, those simple power strips usually use MOV's that clip at
> 140 volts. They deteriorate with power surges (I've actually taken older
> MOV's apart and found them full of microscopic cracks), so it may be your
> unit now has MOV's in it that clip at a lower voltage, like 120 volts. That
> would certainly do it. I wonder if a brand-new power strip has the problem?
>
> 73, Zack W9SZ
>
>
> On Mon, Jul 6, 2015 at 11:14 PM, Marshall-K5QE <k5qe@k5qe.com> wrote:
>
> >
> > We also found a simple power strip that was radiating like crazy. How
> can
> > a simple power strip produce loads of RF junk??? Beats me.
> >
> >
>
>
> ------------------------------
>
> Message: 3
> Date: Tue, 7 Jul 2015 07:21:21 -0500
> From: "Mike (KA5CVH) Urich" <mike@ka5cvh.com>
> To: Marshall-K5QE <k5qe@k5qe.com>
> Cc: VHF Contesting <vhfcontesting@contesting.com>
> Subject: Re: [VHFcontesting] UPS with no radio noise???
> Message-ID:
> <CA+hFFPkL_=
> OKah_e+Z51zmVsa7pdW-b6tLNohvcPFQjHJg4fzA@mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> On Mon, Jul 6, 2015 at 11:14 PM, Marshall-K5QE <k5qe@k5qe.com> wrote:
>
> Does anyone know of a brand / model of UPS that does not emit a bunch of
> RFI??
>
> Mike wrote
>
> I do pro-sound on the side <not that DJ crap> and the most popular
> units among the high end concert sound companies is http://surgex.com/
>
> --
> Mike Urich KA5CVH
> http://ka5cvh.com
>
> I want a government small enough to fit inside the constitution.
>
>
> ------------------------------
>
> Message: 4
> Date: Tue, 7 Jul 2015 13:07:31 +0000 (UTC)
> From: RT Clay <rt_clay@bellsouth.net>
> To: VHF Contesting <vhfcontesting@contesting.com>
> Subject: Re: [VHFcontesting] UPS with no radio noise???
> Message-ID:
> <817855078.172396.1436274451487.JavaMail.yahoo@mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> Since you have many devices which seem to emitting noise, maybe you have
> some other device on the AC line that is emitting the noise, and it is
> being passed through the UPS and power strip? I have never seen a power
> strip emitting noise, although as Zack suggested it might be possible.
> TorN4OGW
>
> On Monday, July 6, 2015 11:14 PM, Marshall-K5QE <k5qe@k5qe.com>
> wrote:
>
>
>
> Hello everyone....I got an MFJ-856(power line noise detector) assembled
> today and was preparing to go outside and look for all the nasty power
> line noise that we have.? I happened to wave it around the shack and I
> found some strong noise.....tracing it down, we found that all of our
> APC UPS systems(except one) were emitting a boatload of RF crap!!
>
> We also found a simple power strip that was radiating like crazy.? How
> can a simple power strip produce loads of RF junk???? Beats me.
>
> So, now I need to replace all my UPS units with something that does not
> make noise.? I have asked a salesman type person and they don't have a
> clue about RF noise.? None of the UPS units seem to pay any attention to
> that...it certainly is not part of their specs.
>
> Does anyone know of a brand / model of UPS that does not emit a bunch of
> RFI??? I don't need a huge UPS for each station, but I need something
> that is quiet.? AFTER we fix the noise in-house, we will go outside and
> start with the noise that is coming in on the antennas.? I know that I
> have a bunch of power line noise too, but I need to have a clean house
> before I start with the power company.
>
> I also want to find some power cords, like those on computers and
> monitors, that have the built in noise suppressors.? I don't know where
> to order those from either.
>
> Thanks for any advice / recommendations.? If anyone works in that world
> I would really appreciate hearing from them.
>
> I hope to get these UPS units replaced before the CQ WW VHF
> contest......by the way, I will be looking for everyone on 6M and 2M in
> the CQ contest....18 and 19 July....
>
> 73 Marshall K5QE
> Phone is 409-787-3830 if you want to talk.....
> _______________________________________________
> VHFcontesting mailing list
> VHFcontesting@contesting.com
> http://lists.contesting.com/mailman/listinfo/vhfcontesting
>
>
>
>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 7 Jul 2015 09:21:16 -0400
> From: Buddy Morgan <beamar@aol.com>
> To: vhfcontesting@contesting.com
> Subject: Re: [VHFcontesting] UPS with no radio noise???
> Message-ID: <14e68ad78ca-2182-3d597@webprd-m57.mail.aol.com>
> Content-Type: text/plain; charset=utf-8
>
>
> I seem to do this kind of stuff, pretty often. I would start by opening
> circuit breakers. Then trace to an individual device. Cable TV and FIOS
> power supplies are a problem. Never had a problem with a UPS. Battery
> chargers, especially computer battery chargers can be a problem. After you
> get your own house, clean, then go outside. I use my FT 817 to run down
> noise. I start with the 6M Rubber Ducky, then when I get closer, switch to
> my Arrow Satellite Yagi. You usually can nail a noise source pretty close
> on 432. Then you have to call the power company - some are better than
> others.
>
> There is no magic formula for running down RFI. You just have to look at
> everything and persevere. Hope this helps...
>
> Buddy WB4OMG
>
>
>
>
>
>
>
>
>
> ------------------------------
>
> Message: 6
> Date: Tue, 7 Jul 2015 10:10:16 -0400
> From: <ejkkjh@gmail.com>
> To: "Marshall-K5QE" <k5qe@k5qe.com>, "VHF Contesting"
> <vhfcontesting@contesting.com>
> Subject: Re: [VHFcontesting] UPS with no radio noise???
> Message-ID: <1B8203CA504C4A9D914C244499C7F182@ejhPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> Marshall,
> I also have this problem, especially on 6 meters. We have 3 UPS for our
> computers, brands are APC and Cyber Power, neither emit any noise that I
> have detected. I turn them off, unplug them, no change in noise. I have
> found noise in power strip from a bad connection. I have a AC line filter
> on power going to rigs, that helps some.
> On 6 meters especially and some on 2 meters I have found lots of things in
> the house that a good rig, receiver picks up. Some of the worst are small
> AC/DC power supplies like on cordless phones. All of our TVs, Plasma, LED,
> LCD emit some noise. Ceiling fans with light dimmers. Routers and network
> switches.
> Even with all these off I still have problems, have not found it yet but
> its
> in the house somewhere, with mains off, no noise. good luck 73
> Emory WM3M
>
> -----Original Message-----
> From: Marshall-K5QE
> Sent: Tuesday, July 07, 2015 12:14 AM
> To: VHF Contesting
> Subject: [VHFcontesting] UPS with no radio noise???
>
> Hello everyone....I got an MFJ-856(power line noise detector) assembled
> today and was preparing to go outside and look for all the nasty power
> line noise that we have. I happened to wave it around the shack and I
> found some strong noise.....tracing it down, we found that all of our
> APC UPS systems(except one) were emitting a boatload of RF crap!!
>
> We also found a simple power strip that was radiating like crazy. How
> can a simple power strip produce loads of RF junk??? Beats me.
>
> So, now I need to replace all my UPS units with something that does not
> make noise. I have asked a salesman type person and they don't have a
> clue about RF noise. None of the UPS units seem to pay any attention to
> that...it certainly is not part of their specs.
>
> Does anyone know of a brand / model of UPS that does not emit a bunch of
> RFI?? I don't need a huge UPS for each station, but I need something
> that is quiet. AFTER we fix the noise in-house, we will go outside and
> start with the noise that is coming in on the antennas. I know that I
> have a bunch of power line noise too, but I need to have a clean house
> before I start with the power company.
>
> I also want to find some power cords, like those on computers and
> monitors, that have the built in noise suppressors. I don't know where
> to order those from either.
>
> Thanks for any advice / recommendations. If anyone works in that world
> I would really appreciate hearing from them.
>
> I hope to get these UPS units replaced before the CQ WW VHF
> contest......by the way, I will be looking for everyone on 6M and 2M in
> the CQ contest....18 and 19 July....
>
> 73 Marshall K5QE
> Phone is 409-787-3830 if you want to talk.....
> _______________________________________________
> VHFcontesting mailing list
> VHFcontesting@contesting.com
> http://lists.contesting.com/mailman/listinfo/vhfcontesting
>
>
>
> ------------------------------
>
> Subject: Digest Footer
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> ------------------------------
>
> End of VHFcontesting Digest, Vol 151, Issue 2
> *********************************************
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