Re: [Elecraft] [RFI] Mysterious K3 Symptoms - RFI? : Important addendum

FWIW: I used to use the RRC1258 to access a remote station, and I had this issue at times.  The AF gain would go very low, any small movement of the AF Gain control would restore it instantly.  It's old info, I don't use the 1258 anymore, but it was real for me when I did. 73, Fred ["Skip"] K

Re: [Elecraft] [RFI] Mysterious K3 Symptoms - RFI? : Important addendum

I have similar problems but I was thinking it was hamlib because of the way it triggers for me. It happens running wsjtx on an M2 Macbook Pro and remoterig down to the radio in my basement. There's a K3/0 in my office -> remoterig -> K3 & KPA1500 in the basement. Almost every time I move my trans

Re: [Elecraft] [RFI] HI CUR warning on K3

Hi Pete, I had a similar set of symptoms with my K3 several years back. Turns out it was not the K3 at all, but a failing filter capacitor in my linear regulated power supply. I had sporadic audio dropouts after transmitting in much the same way as you described, always at QRP TX levels. Try a

Re: [Elecraft] RFI wiht my KX3

In addition to the reply by Jim, be careful if using ready made “audio” extension cables. Many are not screened and will pickup RF. Even with antennas that are not close to your shack, you can have high RF levels on the coax outer, in turn that means on the case of your KX3. An easy to make RF cla

Re: [Elecraft] RFI wiht my KX3

On 3/19/2023 1:40 PM, John Pierce via Elecraft wrote: Is it possible to accomplish what I am trying to do? Sure -- ditch the preamp, which is un-necessary, make sure that bias is turned off, and make/use a properly wired cable adapter. Another question -- what mic are you trying to use and wh

[Elecraft] RFI wiht my KX3

I am trying to use a dynamic mic with my KX3 and have RFI on my output. I am using the KX3 as a driver to a KM3KM amplifier looking to get about 400 to 500 watts output. I have a small pre-amp between the mike and the KX3. I have modified the pre-amp to ground the lines from and two the pre-amp a

Re: [Elecraft] RFI

Hi, Purchase some FT240-31 ferrite cores, (https://www.farnell.com/datasheets/1912768.pdf), and wind at least 5 turns of each cable going to, or from, the computer through the ferrite. I have several of these, and they stopped ALL of my RFI issues with my computer, and with a weather station

Re: [Elecraft] RFI

Thanks all for all the sensible suggestions; I have enough to go try to solve it now. 73 de Dave, W5SV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:E

Re: [Elecraft] RFI

K9YC, Jim Brown, has an excellent set of papers and presentation slide sets on antenna chokes and solving RFI issues that should help with all aspects of your issues at the following web addresses: http://audiosystemsgroup.com/RFI-Ham.pdf http://audiosystemsgroup.com <- homepage Very good cover

Re: [Elecraft] RFI

Same issue here - our CC&Rs specifically say no outdoor antennas However, another thing to consider is to use a flag pole style antenna. I understand that many states’ laws have provisions that prevent any HOA from denying the installation of a flag pole in one’s yard. I know for a fact that m

Re: [Elecraft] RFI

On 2021-12-19 16:24, David F. Reed wrote: Due to some HOA C&R, I am confined to attic and gutter antennas for the time being. I have a similar situation. Our CC&R's prohibit any and all antennas. Period. Here's how I dealt with it. I ran for the Board. Have been serving for 10 years.

Re: [Elecraft] RFI

The fact that clamp-ons reduced but didn't cure is a good sign.  A few turns thru ferrite toroids are ever so much more effective than the clamp-ons which I think is what you mean by "beads."  Mix 31 is best for HF, but 43 will also work well.  USB cables with an A-connector on one end and a B

Re: [Elecraft] RFI

Bond the computer case and radio with strap.  That provides an alternate path for RF reducing the amount on the USB cable. Buck, K4IA DXCC Honor Roll 8BDXCC Author EasyWayHamBooks.com On 12/19/2021 7:24 PM, David F. Reed wrote: Due to some HOA C&R, I am confined to attic and gutter antennas f

[Elecraft] RFI

Due to some HOA C&R, I am confined to attic and gutter antennas for the time being. I am getting a bit of RFI on occasion into my PC; it manifests itself mainly by apparently disconnecting the com port from Commander.  When this happens, I can restore functionality by selecting a different c

[Elecraft] RFI issues with Keurig Dual Pro 5200

les j jr" To: Bob McGraw K4TAX Cc: "elecraft@mailman.qth.net" Subject: Re: [Elecraft] RFI issues Message-ID: Content-Type: text/plain; charset="utf-8" There's a paragraph of slightly raised writing on the bottom...really hard to read, but if I get a chance to turn it over

Re: [Elecraft] RFI issues

On 2/22/2020 11:59 AM, Lyn Norstad wrote: Approximately 10 mi SW of us is a different sort of problem. A commercial shortwave station has been built and is operating on an experimental basis. Their plan is to transmit market data over the pole to High Speed Traders in Europe (milliseconds faster

Re: [Elecraft] RFI issues

craft@mailman.qth.net Subject: Re: [Elecraft] RFI issues On 2/21/2020 6:12 PM, Lyn Norstad wrote: > In Chicagoland, all wiring must be in conduits, and both the > kitchen and the shack are on their own circuits. In fact, the only 'home > grown' RFI I am aware of is 1 out of 4 identical

Re: [Elecraft] RFI issues

On 2/21/2020 6:12 PM, Lyn Norstad wrote: In Chicagoland, all wiring must be in conduits, and both the kitchen and the shack are on their own circuits. In fact, the only 'home grown' RFI I am aware of is 1 out of 4 identical HP 24" LED monitors that puts out a steady carrier on 30 meters. Havin

Re: [Elecraft] RFI issues

;>> On Feb 21, 2020, at 7:20 PM, Gary K9GS wrote: >>> >>> What's the MODEL number??73,Gary K9GS >>> Original message ----From: "hawley, charles j jr" >>> Date: 2/21/20 5:08 PM (GMT-06:00) To: >>> l...@lnainc.com

Re: [Elecraft] RFI issues

c: elecraft@mailman.qth.net, W8JH > Subject: Re: [Elecraft] RFI issues This is the newest one that brews a carafe > of 10 cups or does a pod into your mug. I too have had others without any > noise, but this new one puts a huge sine wave of noise on the panadapter. I > have put ferrite o

Re: [Elecraft] RFI issues

FI I am aware of is 1 out of 4 identical HP 24" LED monitors that puts out a steady carrier on 30 meters. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Friday, February 21, 2020 1:20 PM To: elecraft@mailman.

Re: [Elecraft] RFI issues

riginal message From: "hawley, charles j jr" >> Date: 2/21/20 5:08 PM (GMT-06:00) To: >> l...@lnainc.com Cc: elecraft@mailman.qth.net, W8JH >> Subject: Re: [Elecraft] RFI issues This is the newest one that brews a >> carafe of 10 cups or does a p

Re: [Elecraft] RFI issues

From: "hawley, charles j jr" > Date: 2/21/20 5:08 PM (GMT-06:00) To: > l...@lnainc.com Cc: elecraft@mailman.qth.net, W8JH > Subject: Re: [Elecraft] RFI issues This is the newest one that brews a carafe > of 10 cups or does a pod into your mug. I too have had others with

Re: [Elecraft] RFI issues

I don't know the mx. I get it though, it's worked on switching supplies and I wind multiple turns. They did a great job on a treadmill. A different mix may be better because it seems like a lower frequency. Jack BMW Motorcycles Chuck KE9UW c-haw...@illinois.edu Sent from my iPad > On Feb 21,

Re: [Elecraft] RFI issues

What's the MODEL number??73,Gary K9GS Original message From: "hawley, charles j jr" Date: 2/21/20 5:08 PM (GMT-06:00) To: l...@lnainc.com Cc: elecraft@mailman.qth.net, W8JH Subject: Re: [Elecraft] RFI issues This is the newest one that brews a carafe of 10

Re: [Elecraft] RFI issues

On 2/21/2020 3:08 PM, hawley, charles j jr wrote: I have put ferrite on the line cord which don't affect it. Which ferrite? There are dozens of different types. Did you just clamp one on, or did you wind multiple turns through it as shown in these links? http://k9yc.com/KillingReceiveNoise.pd

Re: [Elecraft] RFI issues

ay, February 20, 2020 2:04 PM > To: W8JH > Cc: elecraft@mailman.qth.net > Subject: Re: [Elecraft] RFI issues > > I still love the coffee maker and would buy it again. I just turn it off > after the pot or pod is brewed. > > Chuck Jack Hawley > KE9UW > > Sent fro

Re: [Elecraft] RFI issues

(Sorry about the previous blank message -- this is now the ONLY mailgroup I'm subscribed to that refuses HTML-formatted mail, which is the default setting for my mail client). It's amazing the things that can cause issues. From my experience: 1) An automatic porch light sensor, the kind that sc

Re: [Elecraft] RFI issues

__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: ht

Re: [Elecraft] RFI issues

On 2/21/2020 9:41 AM, Lyn Norstad wrote: Kitchen is right next door to the shack, and the pot is on all day. What matters is distance to antennas, not the shack. The nature of electrical wiring in your home also matters, because it's that wiring that radiates any noise produced. 73, Jim K9Y

Re: [Elecraft] RFI issues

lf Of hawley, charles j jr Sent: Thursday, February 20, 2020 2:04 PM To: W8JH Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] RFI issues I still love the coffee maker and would buy it again. I just turn it off after the pot or pod is brewed. Chuck Jack Hawley KE9UW Sent from my iPhone,

Re: [Elecraft] RFI issues

RF overload can do a lot of things. Try above and below 12W (8W on 6m) to see if the KPA3 is swamped. Or an antenna on the RX port (If KXV3 equipped). Also RF overload can excite any loose connections at the tower site, rusty metal, fence joints etc. You are just going to have to sniff around wi

Re: [Elecraft] RFI issues

I still love the coffee maker and would buy it again. I just turn it off after the pot or pod is brewed. Chuck Jack Hawley KE9UW Sent from my iPhone, cjack > On Feb 20, 2020, at 12:12 PM, W8JH wrote: > > ke9uw wrote >> We bought a new Keurig coffee maker which does a pot or also the pods.

Re: [Elecraft] RFI issues

On 2/20/2020 10:22 AM, Victor Rosenthal 4X6GP wrote: Not so fast. The K3's T/R switch can be overwhelmed by very strong signals. The result is intermod junk all over the bands. This happened to me with a 50 kW AM BC signal at about 1000 kHz that is line-of-sight to my antenna. I don't see why a

Re: [Elecraft] RFI issues

We gave our plasma TV to our parish and I bought my wife a new LED TV so she could watch her programs and I could operate HF without the horrible noise from the plasma TV! 73, Bill, K8TE I still have a neighbor with a noisy plasma TV -- Sent from: http://elecraft.365791.n2.nabble.com/ ___

Re: [Elecraft] RFI issues

Not so fast. The K3's T/R switch can be overwhelmed by very strong signals. The result is intermod junk all over the bands. This happened to me with a 50 kW AM BC signal at about 1000 kHz that is line-of-sight to my antenna. I don't see why a super-strong VHF signal couldn't have the same effec

Re: [Elecraft] RFI issues

It's really important to make sure you're listening to the right source. One way to do that is to listen to the audio from your home receiver (AM mode, AGC off, RF gain backed down to avoid overload) while you are searching. There will be a pattern of fluctuations. When they match, you have the

Re: [Elecraft] RFI issues

ke9uw wrote > We bought a new Keurig coffee maker which does a pot or also the pods. It > puts a huge noise out to the ham frequencies. Have to turn it off to get > on 80M That is a serious conflict! 80m morning greyline without caffeine, people cannot live this way!! - 73, Joe, W8JH K3

Re: [Elecraft] RFI issues

Andreas:  The probability that your noise is due to the TV or FM station is extremely low [like really zero]. Meadow Lakes CA is the "TV/FM capital" for the southern Central Valley [Fresno], and my 2m HT goes full bars about 2 miles from the complex on both FM and AM [aeronautical band].  When

Re: [Elecraft] RFI issues

I once had a noise issue and I used my KX3 roving about the neighborhood to find it. Actually, I found a number of loud noise sources doing that as I moved around. It seems that if the noise level is fairly constant as you move around the area but will within the same general distance from the

Re: [Elecraft] RFI issues

On 2/18/2020 4:38 PM, Andreas Wachter via Elecraft wrote: Yes, I did run the K3 off of a battery and pulled the main AC breaker. Didn’t make any difference. Thus my suspicion that the RFI is related to the 208 kW ERP TV station (and/or 63 kW EPR FM station) which are within 1.6 miles and in di

Re: [Elecraft] RFI issues

On 2/19/2020 7:12 AM, Gmail - George wrote: Andreas, You might want to go to the station and talk the the Chief Engineer. If he is the nice-guygal type CE he will help you (Not al CEs are the nice kind but most are). Maybe in 1960, but no way in 2020. Besides, it is quite unlikely that these s

Re: [Elecraft] RFI issues

FWIW: We recently gave up the grinder, we found that the very fine ground in the store made much better coffee than what we could get from whole beans in our grinder. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 2/19/2020 1:31 PM, Wes wrote: Me too.  I was just complaining to my X

Re: [Elecraft] RFI issues

Me too.  I was just complaining to my XYL about having to fill the bean grinder, grind the beans, and water the brewer and suggested getting one.  They use them in her law office but she said no, she likes fresh ground.  I guess this ends that idea. Wes  N7WS On 2/19/2020 5:17 AM, Dave Cole w

Re: [Elecraft] RFI issues

Andreas, TV transmitters at 500 MHz +- are really not noise disrupters in our amateur HF world. In fact, in our AREDN mesh work in LA, we’ve found that Ubiquiti sector antennas at 3 GHz and 5 GHz producing just milliwatts of power play nicely next to commercial TV transmitters generating 1.5-mil

Re: [Elecraft] RFI issues

Andreas, You might want to go to the station and talk the the Chief Engineer. If he is the nice-guygal type CE he will help you (Not al CEs are the nice kind but most are). I'd suggest that he/she cycle the two transmitters on/off while you are at your station. He/She won't do that during the e

[Elecraft] RFI issues

I recently had an intermittent high noise level on 6 m band and there seemed to be a correlation with activity at my neighbors house. I ran a PC application that showed my transceiver's S meter and remoted my PC desktop to my Android phone with TeamViewer. Next time my neighbor was working in

Re: [Elecraft] RFI issues

Thanks, I was considering one of those... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 2/18/20 7:55 PM, hawley, charles j jr wrote: We bought a new Keurig coffee maker which does a pot

Re: [Elecraft] RFI issues

We bought a new Keurig coffee maker which does a pot or also the pods. It puts a huge noise out to the ham frequencies. Have to turn it off to get on 80M Chuck Jack Hawley KE9UW Sent from my iPhone, cjack > On Feb 18, 2020, at 5:51 PM, Bill Lederer wrote: > > House we just moved into, we d

Re: [Elecraft] RFI issues

it out quite well when the TV in on. Eventually the TV will die (I'm hoping). Good luck! Hank K4HYJ - Original Message - From: Andreas Wachter via Elecraft (elecraft@mailman.qth.net) Date: 02/18/20 12:39 To: elecraft@mailman.qth.net Subject: [Elecraft] RFI issues I live abo

Re: [Elecraft] RFI issues

One of the first things to try is to operate the station receiver from a battery, disconnect everything including the external ground,  but the antenna.  Then drop the mains breaker to the property.  If the noise changes, then some or part of it is on your property.  If the noise does not chang

Re: [Elecraft] RFI issues

sy plasma TV - an MFJ-1026 with a longwire > out the window nulls it out quite well when the TV in on. Eventually the TV > will die (I'm hoping). > > Good luck! > Hank > K4HYJ > > > - Original Message - > From: Andreas Wachter via Elecraft (elecraft@m

Re: [Elecraft] RFI issues

Have you inquired at a local ham radio club for help with your RFI/EMI issues for assistance in finding the problem? I doubt  transmitters 1.6 miles away would create problems for you. 73, Keith, N6JPA On 2/18/2020 8:29 AM, Andreas Wachter via Elecraft wrote: I live about 1.6 miles from som

Re: [Elecraft] RFI issues

House we just moved into, we did new under-the-counter lighting. Once I got the ham shack started, I saw s9 noise on 160 and 80. Turn them off, and it becomes quiet. Other led panel lights produce no noise whatsoever. But now that that is identified, I will be tracking down some other noise, lik

Re: [Elecraft] RFI issues

Had a similar issue moving to a new QTH. It turned out to be a bad transformer in the neighborhood. You could call in an RFI complaint once you rule out your own QTH and asked them to sniff around. You can also sniff around with a 2 or 6 meter SSB rig if you have one. Fred KE4Q On Tue, Feb 18, 2

Re: [Elecraft] RFI issues

HI Andreas Sorry to hear about your noise. I doubt your noise is related to digital TV as that is a long way away in the frequency world. It is pretty common to assume that it is not on your own property. I saw one guy who said the same thing and then found out a year later it was his new dryer

Re: [Elecraft] RFI issues

Hi, I might suspect something else... Have you done a power off test of your home yet? 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 2/18/20 8:29 AM, Andreas Wachter via Elecraft wrote

Re: [Elecraft] RFI issues

I have some pages which might help locate your RFI at: https://www.nk7z.net/i-have-rfi-now-what-locating-it/ Also Jim Brown has a ton of data at: http://www.audiosystemsgroup.com/publish.htm 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL

Re: [Elecraft] RFI issues

On 2/18/2020 8:29 AM, Andreas Wachter via Elecraft wrote: Could it be that the TV/FM stations antenna towers, which are within direct line of sight from my house, might be responsible for the RFI? Very unlikely. This application not provides lots of advice on finding and killing noise. http:

Re: [Elecraft] RFI issues

hoping). Good luck! Hank K4HYJ   - Original Message - From: Andreas Wachter via Elecraft (elecraft@mailman.qth.net) Date: 02/18/20 12:39 To: elecraft@mailman.qth.net Subject: [Elecraft] RFI issues I live about 1.6 miles from some tall antenna towers broadcasting digital TV (KBCB) a

Re: [Elecraft] RFI issues

One thing to try is an old-fashioned lowpass filter, such as used to be common as a measure against TVI. If the problem is caused by the TV/FM signals, this should help. The K3's t/r switch can be overwhelmed by massive signals. I had such a problem with a 50 kW AM BC station that's visible fr

[Elecraft] RFI issues

I live about 1.6 miles from some tall antenna towers broadcasting digital TV (KBCB) at 208 kW ERP on channel 19 (500 - 506 MHz) and on FM (KWPZ-FM) at 63 kW ERP on 106.5MHz - according to FCC info on KBCB and KWPZ-FM. Ever since I moved to this QTH a few months ago, I am unable to use my K3: sol

[Elecraft] RFI in shack with New audio cable for sound card upgrade.

All:   Recently I submitted an issue on the above item. Since then I have put 6 turns of the USB cable on a 1.0 in id 31 toroid and it reduced it. I then put 5 turns on the USB cable going to the multi jack USB adapter and that cleared up the problem.  Make sure that you use 31 mix as othes did

[Elecraft] RFI Snapshots wanted...

Hi, I have added an informal and unscientific survey asking if you have RFI at https://www.nk7z.net Please take it if you have time. It is a single question asking if you have RFI. It is two posts down on the right side. Sorry for no direct link to it, it is on the sidebar. Also, if you

Re: [Elecraft] RFI Snapshots...

That is a very good idea, and I have, and if I get sound with an SDR image, I add it to the site... As you said though, bandwidth, etc., tend to make things sound different depending on who uploads. The real useful thing about the spectrograms are that they can be used as a site survey tool a

Re: [Elecraft] RFI Snapshots...

Dave Have you considered including sound clips with the snapshots as well? Being able to see *and* hear the RFI can go a long way toward making a positive ID. Of course, RX mode and bandwidth info would need to be included as well. 73 - Al, K2ZN On 7/5/2018 4:22 PM, Dave Cole (NK7Z) wrote

[Elecraft] RFI Snapshots...

I have compiled a set of snapshots of various RFI sources from a number of folks that were kind enough to send them in to me. They are at: https://www.nk7z.net/rfi-snapshots/ There are close to 50 different images showing various sources there... I am always looking for a P3 image of RFI of a

[Elecraft] rfi

Hi all, I have a K3 & P3. I operate both locally on an HOA-stealth EFHW on the fence, and remote to W7RN. The P3 works at home, but not when I'm remote of course. Running at home on 80m, I see what appears to be an SMPS -- ramps up rapidly going up in frequency, then tails off, waterfall s

Re: [Elecraft] RFI on K3s

Let's end this recurring thread for now in the interest of relieving email topic overload for others :-) Its well exceeding our single OT posting limit and has a wealth of past posts on this topic in our nabble archives etc. 73, Eric (a.k.a. Mr. Moderator) elecraft.com --- Sent from my iPhone

Re: [Elecraft] RFI on K3s

One can convert red/black zip wire pretty easily: zip wire separates by pulling the red side away from the black so you end up with two separate wires (you can even leave the power-pole connector on one end). Then twist the two wires to obtain twisted-pair. No waste of those existing power

Re: [Elecraft] Elecraft] RFI on K3s

It IS really nice cable though... Used that type and multi-conductor of same spec to wire helicopters when I was a Aviation MTP... Beautiful stuff. __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 6/21/2016 4:43 PM, Grant Youngman wrote: > I'm still wondering why any

Re: [Elecraft] Elecraft] RFI on K3s

On Tue,6/21/2016 5:41 PM, Walter Underwood wrote: But thanks to the skin effect, silver plated power cables should conduct RFI energy BETTER than regular copper cables. Yes, but those silver plated cables are being touted for for loudspeakers, where, as I noted in an earlier post, cable resis

Re: [Elecraft] Elecraft] RFI on K3s

But thanks to the skin effect, silver plated power cables should conduct RFI energy BETTER than regular copper cables. I wasn’t going to respond again, but I’m weak. Eric should be invoking the “damping factor” on this thread soon. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood

Re: [Elecraft] Elecraft] RFI on K3s

On Tue,6/21/2016 3:05 PM, riese-k3...@juno.com wrote: its silver plated Which, contrary to the hype from ripoff artists in the high futility world will try to tell you, offers NO performance benefit over POC (plain, ordinary copper) in even the most esoteric of audio systems. There's a clas

Re: [Elecraft] Elecraft] RFI on K3s

its silver plated Bob K3DJC On Tue, 21 Jun 2016 16:43:44 -0500 Grant Youngman writes: > I'm still wondering why anyone would BUY a bit of 10 ga twisted pair. > It blows the mind. > > To each his own I suppose but really? > > On the other hand, I do know one or two hams who will stare at

Re: [Elecraft] Elecraft] RFI on K3s

I'm still wondering why anyone would BUY a bit of 10 ga twisted pair. It blows the mind. To each his own I suppose but really? On the other hand, I do know one or two hams who will stare at a pair of RCA plugs and a bit of wire with a deer-in-the-headlights look in their eyes and then dri

Re: [Elecraft] Elecraft] RFI on K3s

Some one ask for this On ePay: http://www.ebay.com/itm/10-feet-10-AWG-Shielded-Twisted-Pair-Silver-Plated-Cable-speaker-wire-37-strands-/381493258989?hash=item58d2c52aed:g:2YEAAOSwTapV4jU~ de Ben W4SC __ Elecraft mailing list Ho

[Elecraft] RFI on K3s

Tnx to all the input ... all my pwr leads in the shack are now twisted (as is my mind) ... never had RFI to begin with! tnx 73 Dwight NS9I __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mai

Re: [Elecraft] Elecraft] RFI on K3s

I'd likely be interested in about 100 feet. Have to study the specs more, but Anixster's part is half the cost of the others... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 6/21/2016 9:48 AM, Walter Underwood wrote: > Belen appears to make a 10 AWG twisted pair c

Re: [Elecraft] RFI on K3s

Dwight, here’s one example of a shield twisted pair: Belden 12/2 5000FE: http://www.showmecables.com/product/Belden-2-Conductor-12-Awg-Stranded-Shielded-Cable-Per-FT.aspx Twisted pair. Foil shiel

Re: [Elecraft] RFI on K3s

Hi Jimmy, While I've not investigated it myself, I've been told by those who have that the bus conductors inside some of these boxes are not very robust. In my station, I've made my own cable splices using Power Pole connectors. One pair, as short as I can make it, goes directly to the K3, an

Re: [Elecraft] Elecraft] RFI on K3s

Interesting. Putting one on my dishwasher almost completely silenced it. It had been S8. I'm thinking of adding one to the XYL's treadmill. 73 de Brian/K3KO On 6/21/2016 16:42 PM, Jim Brown wrote: On Tue,6/21/2016 9:22 AM, brian wrote: Nothing has been mentioned on what had been standard pr

Re: [Elecraft] RFI on K3s

On Mon,6/20/2016 6:50 PM, K9MA wrote: Call them what you will, connecting a bunch of station components to a common DC power return has to be done very carefully. Yes, it does. The rules are quite simple, and are articulated in the Power Point slides I referenced by a link. It's nothing more

Re: [Elecraft] Elecraft] RFI on K3s

On Tue,6/21/2016 9:22 AM, brian wrote: Nothing has been mentioned on what had been standard practice years ago. That is installing a good RFI filter on the mains right at the station. These filter can knock things down 40 dB in both directions. The reason nothing has been mentioned about it

Re: [Elecraft] Elecraft] RFI on K3s

The datasheet for this product doesn't say anything about it being twisted. In fact, they call it parallel in the description. http://www.belden.com/techdatas/metric/8678.pdf On Tue, Jun 21, 2016 at 10:48 AM, Walter Underwood wrote: > Belen appears to make a 10 AWG twisted pair cable, but I onl

Re: [Elecraft] Elecraft] RFI on K3s

I'm a big fan of Belden cables, but why go to the trouble of a group purchase when it is so easy to make your own twisted pair from lengths of stranded cable we can buy at the local big box store? The Belden cables referenced are primarily used for loudspeaker wiring in big sound systems. I spe

Re: [Elecraft] Elecraft] RFI on K3s

Perhaps rightly so, all this is focusing on RFI getting into the radio via the antenna. Nothing has been mentioned on what had been standard practice years ago. That is installing a good RFI filter on the mains right at the station. These filter can knock things down 40 dB in both directions.

Re: [Elecraft] Elecraft] RFI on K3s

> Cc: elecraft@mailman.qth.net > Subject: Re: [Elecraft] Elecraft] RFI on K3s > > If one has a source of the red/black #10 zip cord (seemingly very common in > the > US), then simply zip it apart, and then twist it yourself. Then you still > have the > advantage of the color-coded

Re: [Elecraft] Elecraft] RFI on K3s

If one has a source of the red/black #10 zip cord (seemingly very common in the US), then simply zip it apart, and then twist it yourself. Then you still have the advantage of the color-coded wires. The #10 stuff I've got is 2 round insulated #10 medium stranded wires, one red insulated, one black

Re: [Elecraft] Elecraft] RFI on K3s

Belen appears to make a 10 AWG twisted pair cable, but I only see it available in 500 foot spools. Search for "Belden 8678”. https://www.anixter.com/en_us/products/5T00UP-008500/BELDEN/Multi-Pair-Multi-Conductor-Cable/p/B5T00UP-500

Re: [Elecraft] RFI on K3s

Also, the Elecraft supplied DC zip cord can be twisted by hand pretty easily. RFI from wall-wart SMPS supplies might be improved by twisting their cords... 73, Drew AF2Z On 06/21/16 00:44, Vic Rosenthal wrote: Get some no. 10 stranded wire at Home Depot (etc.), double it over, put one end

Re: [Elecraft] RFI on K3s

Works great! Do it all the time. Father showed me how 50 years ago, the same way Vic describes it ;o) On Tue, 21 Jun 2016 07:44:19 +0300, you wrote: >Get some no. 10 stranded wire at Home Depot (etc.), double it over, put one >end in a vise and the other in the chuck of your electric drill and

Re: [Elecraft] RFI on K3s

: [Elecraft] RFI on K3s How can you detect the drifting if RF if Iyou have to turn off the K-3 and the P3? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post

Re: [Elecraft] Elecraft] RFI on K3s

No, unfortunately. There is a large Ace Hardware near me and places to buy building materials, but it's the not the same. 73, Vic, 4X6GP Rehovot, Israel Formerly K2VCO http://www.qsl.net/k2vco/ On 21 Jun 2016 08:19, Fred C. Jensen wrote: Home Depot is in Israel too? Fred K6DGW Vic Rosenthal

Re: [Elecraft] Elecraft] RFI on K3s

Home Depot is in Israel too? Fred K6DGW Vic Rosenthal wrote: >Get some no. 10 stranded wire at Home Depot (etc.), double it over, put one >end in a vise and the other in the chuck of your electric drill and twist >away. Not shielded, but much better than parallel wires. I suppose you could >s

Re: [Elecraft] RFI on K3s

Get some no. 10 stranded wire at Home Depot (etc.), double it over, put one end in a vise and the other in the chuck of your electric drill and twist away. Not shielded, but much better than parallel wires. I suppose you could strip some RG-8 if you really wanted to shield it. Vic 4X6GP > On 2

Re: [Elecraft] RFI on K3s

Call them what you will, connecting a bunch of station components to a common DC power return has to be done very carefully. I've found that often the easiest solution is isolated power sources. Some accessories seem to be designed with the assumption of ground isolation using a dedicated wall

Re: [Elecraft] RFI on K3s

I've been told that the "loop" part of "ground loop" is a misnomer. I think the real problem is when a "chassis" connection doesn't really go to the conductive enclosure but rather follows on into the "ground" in the circuitry, which is probably better termed "common". In the olden days, find

Re: [Elecraft] RFI on K3s

On Mon,6/20/2016 4:38 PM, K9MA wrote: Beware ground loops! Horse puckey -- ground loops do not exist, and this very false concept has caused hams to do completely wrong things to solve problems with hum, buzz, and RFI. http://k9yc.com/GroundingAndAudio.pdf 73, Jim K9YC ___

Re: [Elecraft] RFI on K3s

Beware ground loops! 73, Scott. K9MA -- Scott Ellington --- via iPad > On Jun 20, 2016, at 12:21 PM, Clay Autery wrote: > > Thanks... > > One of my goals is to completely eliminate wall warts in my shack. I > planned to use a nice quiet multi-voltage output PS(s) and/or buck/boos

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