Re: [Elecraft] OT: Ground rods and concrete

A Uber ground was developed for dry areas during WW2. In damp areas, the concrete can do just what happened in the concrete pole test. Per Wikipedia article: "A disadvantage of Ufer grounds is that the moisture in the concrete can flash into steam during a lightning strike or similar high

Re: [Elecraft] OT: Ground rods and concrete

Just a comment on myth controversy when dealing with Lightning and grounding topics. I know guys that are doing all the wrong things with their practices. They can't be persuaded otherwise. Yet, the odds have favored them for years. That reinforces their thinking that they are right and

Re: [Elecraft] OT: Ground rods and concrete

That isn't even close to being the same condition and only serves to help perpetuate a stupid myth that refuses to die among the ill informed. Anyone that doesn't understand that a Ufer ground is essentially multiple ground rods encased in concrete is indeed ill informed. And anyone who

Re: [Elecraft] K3 & Heil HM-10 Dual

Thanks, Jim. The gain setting just has to be set to HIGH. Bias off. I checked my settings here for the first time in almost seven years. You got me on that. I was thinking of the CM500 headset. Bah. 73, matt W6NIA On 4/17/2017 9:13 PM, Jim McDonald wrote: I have the HM10 Dual and HC4

Re: [Elecraft] K3 & Heil HM-10 Dual

The HC4 and HC5 elements are low output dynamic types - no biasneeded. In fact, it must be off. Gus Hansen KB0YH On 4/17/2017 10:00 PM, Matt Zilmer wrote: That depends on the mic itself. The HC4- and HC5-based mics need bias ON, but don't know about the others (HC6?). Donis correct about the

Re: [Elecraft] K3 & Heil HM-10 Dual

I have the HM10 Dual and HC4 headsets. They do NOT need the bias. I've used the HC4 with and without TXEQ; both are fine. Jim N7US Sent from my iPad On Apr 17, 2017, at 11:00 PM, Matt Zilmer wrote: That depends on the mic itself. The HC4- and HC5-based mics need

Re: [Elecraft] OT: Ground rods and concrete

I don’t think its a myth. In the early 1970’s, the power company I worked for was testing out some hollow reinforced concrete poles. There was considerable concern by the line workers that the poles might be more dangerous to work on than wooden poles, in the event of an accident. To check

Re: [Elecraft] K3 & Heil HM-10 Dual

That depends on the mic itself. The HC4- and HC5-based mics need bias ON, but don't know about the others (HC6?). Donis correct about the gain range setting. Both elements are low output, so use HIGH. z On 4/17/2017 8:44 PM, Steve Wilson via Elecraft wrote: OK. And the bias setting?

Re: [Elecraft] OT; electrical safety

Maybe this applies. We have buried electrical service, but I don't think it matters. I have been told the NEC now calls for four conductor service to include a ground wire from the transformer. I depend on a ground tree. I like the perimeter wire Don, w3fpr describes. Dick, n0ce On

Re: [Elecraft] K3 & Heil HM-10 Dual

I may have misread the Heil webpage. Heil responded and told me to read the K3 manual. Ummm...I was. I just thought the Heil page would help clarify things. It did not, IMHO, and Elecraft couldn't help either. It would help if people, such as Heil, understood that we aren't all mic experts!

[Elecraft] FS - KX3 Complete Base Station price drop

Greetings fellow Elecrafters, I have reduced the price of this great gear from $2600 to $2400 and I will throw in a Pelican 1510 case for it. This equipment is like new at least a 9 out of 10. I also have a XV222 which works 100% and I had one of the fine people on this forum put together for

Re: [Elecraft] K3 & Heil HM-10 Dual

OK. And the bias setting? Thanks, Steve From: Don Wilhelm To: Steve Wilson ; "Elecraft@mailman.qth.net" Sent: Monday, April 17, 2017 8:35 PM Subject: Re: [Elecraft] K3 & Heil HM-10 Dual Steve, Heil is

Re: [Elecraft] K3 & Heil HM-10 Dual

Steve, Heil is giving out erroneous information. The low output Heil microphones require setting the K3 mic gain range to HIGH. 73, Don W3FPR On 4/17/2017 11:14 PM, Steve Wilson via Elecraft wrote: Hi all, I setup a K3, that my godfather is borrowing, while his Kenwood is off the air. I

Re: [Elecraft] K3 & Heil HM-10 Dual

I'd try Front Panel, HIGH, no bias assuming this is a dynamic microphone. In general, Heil dynamic mic elements have low output levels. 73, Lyle KK7P On 4/17/17 8:14 PM, Steve Wilson via Elecraft wrote: ... I deduced that the setting should be Front Panel, Low, No Bias, but am not 100%

Re: [Elecraft] OT; Feedline question

If instead of using the relative permittivity of air, 1.00059, for calculations of open-wire line, you use the effective permittivity including any spacers used to homebrew the line, this value will increase slightly. For instance, I am using spacers made of a material called "nylon 6,6 30%

Re: [Elecraft] OT: Ground rods and concrete

That myth refuses to die. I have 5 concrete tower bases with ground rods partially encased and never a worry about an exploding base. Doug -Original Message- -NEVER- encase a ground rod in concrete ... especially a tower base. As a retired 2-way radio tech, I'm aware of two towers

Re: [Elecraft] K3 & Heil HM-10 Dual

Did you power the k3 off from the power button or by cutting power to the k3? Original message From: Steve Wilson via Elecraft Date: 2017-04-17 11:14 PM (GMT-05:00) To: Elecraft@mailman.qth.net Subject: [Elecraft] K3 Heil HM-10 Dual Hi all,

[Elecraft] K3 & Heil HM-10 Dual

Hi all, I setup a K3, that my godfather is borrowing, while his Kenwood is off the air. I reviewed the webpage on the Heil Sound website here:  https://heilsound.com/heil-amateur-radio/support/dsp-settings/all-things-elecraft/   Unfortunately, the page refers to the mic with regard to the front

[Elecraft] [K3] FS: 73cnc Weighted Knobs

For sale 73 cnc weighted main tuning and VFO B knobs in as new condition. Main tuning knob has ball bearing finger dimple. Black. New cost $150. I will selel them for $115 shipped insured CONTUS only. PayPal preferred. Picture available. Email ai6ii (at) arrl (dot) net 73 ..mike AI6II --

Re: [Elecraft] OT; electrical safety

That description appears to contain several NEC violations... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 4/17/2017 4:40 PM, Mark via Elecraft wrote: > Re: I could see no wires going in to the ground. > > They really hide them these days. I watched my house

[Elecraft] Filter for sale

I have like new KFL3A-1.8k filter for sale. $129 shipped CONUS. PAYPAL OK. __ 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

Re: [Elecraft] OT: Groond rods and concrete

House grounds and tower grounds are designed for different hazards (and risks, which are hazards with dollars). Direct lighting strikes on houses are less common than power line surges. So house grounds are designed for surges, which can be large. A direct strike on a stucco house is going to

[Elecraft] P3/SVGA Digital terminal questions

I'm trying to assist a local with his K3S/P3/SVGA using the P3 terminal. I don't have the SVGA so trying to piece together the info using the manuals. A few questions for all you P3 Terminal Digital mode users: 1. The P3 terminal setup looks to be identical for all modes. Mode is apparently

[Elecraft] What is the correct way to hook up my K2 & K3 to my KAT500 & KPA300 ?

The KPA500 is connected to the the KAT500 via a 15pin cable (AUX on Amp, AMP Control on KAT500) The K3 is connected to the KAT500 via a 15 pin cable as well (ACC on K3, XCVR on KAT500) I have a switch on the Input to the KPA500 that selects either the K2 or the K3 Do I connect the Key Out

Re: [Elecraft] OT: Groond rods and concrete

Clearly, you have something in mind different from me. https://www.tessco.com/products/displayProductInfo.do?sku=12952 Tell me how you avoid the exploding concrete myth using something like this? Or with a bolted base plate:

Re: [Elecraft] OT: Groond rods and concrete

Good article with excellent grounding theory included. Personally, I remove my equipment from the antenna system remotely during bad weather and generally when not operating, via a remote antenna switch, which I forgot to mention. When storms are eminent, I disconnect remotely and allow the

[Elecraft] FS PR6 6M K3 preamp

Have one new in box PR6 available for $100, another used for $75. Shipping included within US; please contact off list. Gene N9SW, PO Box 413, Wayne, IL 60184 Phone: 6304048100. __ Elecraft mailing list Home:

Re: [Elecraft] OT: Groond rods and concrete

Good information on grounding and lightning protection for the Amateur Radio Station can be found in the writings of Ron Block NR2B. He published a series in QST for June, July and August of 2002. Those articles can be downloaded from his website at

Re: [Elecraft] OT: Groond rods and concrete

That would make it tough to get a self-supported tower permitted in Los Angeles County and probably a lot of other jurisdictions. It wouldn't get past the engineering review. Eric KE6US On 4/17/2017 3:16 PM, Wes Stewart wrote: Isn't the tower base pretty much a ground rod? On 4/17/2017 2:16

Re: [Elecraft] OT: Groond rods and concrete

No, unless adequate steps are taken to assure a large ground grid is made. This requires more than just a slab. 73, Bill K9YEQ -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes Stewart Sent: Monday, April 17, 2017 5:17 PM To:

Re: [Elecraft] OT: Groond rods and concrete

Isn't the tower base pretty much a ground rod? On 4/17/2017 2:16 PM, Rose wrote: -NEVER- encase a ground rod in concrete ... especially a tower base. As a retired 2-way radio tech, I'm aware of two towers that had to be re-installed because of lightening strikes exploding their concrete bases.

Re: [Elecraft] OT; electrical safety

You probably have a "UFER" ground, named for Herbert Ufer who came up with the idea of encasing the ground electrode in concrete to protect ordnance storage compartments during WW2, often in the southwestern US with very poor soil conductivity. In the latter 60's, the NEC permitted it unless

Re: [Elecraft] OT; electrical safety

Re:   I could see no wires going in to the ground. They really hide them these days.  I watched my house being built and noticed that just below the service box, they passed the ground wire from the inside of the wall to the outside, and then down to the ground rod.  Since the wall was then

Re: [Elecraft] Comm does not work after KIO3B installation

Adde, If you get any message at all on the computer, then the computer knows that "some" device is connected. If that is the case, you may need to load the driver manually - download from the Elecraft website. It is an FTDI USB to serial converter, and Windows 10 normally loads the driver

Re: [Elecraft] OT; electrical safety

Knut, When I built my house in 2001, only one ground rod at the utility entry point was required. We built a house next door in 2009, and two ground rods separated by 6 feet was required. So sometime between those two dates the NEC requirements changed. None-the-less, I have a perimeter

[Elecraft] OT: Groond rods and concrete

-NEVER- encase a ground rod in concrete ... especially a tower base. As a retired 2-way radio tech, I'm aware of two towers that had to be re-installed because of lightening strikes exploding their concrete bases. 73! Ken - K0PP On Mon, Apr 17, 2017 at 3:06 PM, Matt Zilmer

Re: [Elecraft] OT; electrical safety

Or you are the ground! :-) Open your panel cover, if you are comfortable, and look for copper to grounding bar installation. I had my electrician bind an around the foundation wire to my box and then to the rebar. At the time I built there was no inspector, 2004. Can you believe it? Lots

Re: [Elecraft] OT; electrical safety

Most house grounds are just a piece of re-bar hammered into the soil, andthis is done before the foundation is poured around it. Ours is barely visible except for the big chair clamp that secures the bare #8 wire to it. I've seen it other ways too, for example in the upper midwest. The ground

Re: [Elecraft] OT; electrical safety

I'm guessing you and your neighbors have grounding via a basement slab Ufer. 73 jim ab3cv On Mon, Apr 17, 2017 at 5:00 PM, ab2tc wrote: > Hi, > > This is totally off topic; I apologize. > > I just received the new ARRL publication "grounding and bonding for the > radio

[Elecraft] OT; electrical safety

Hi, This is totally off topic; I apologize. I just received the new ARRL publication "grounding and bonding for the radio amateur". It is very interesting reading. I see that the NEC requires two ground rods for regular power installations; never mind any antennas. I swear that when when I

[Elecraft] Comm does not work after KIO3B installation

Hi all! I recently installed the KIO3B (the USB module) upgrade in my K3. The K3 recognize the KIO3B board and I am able to choose "USb" under the CONFIG->RS232 menu settings. However, when connecting the K3 to my computer, the computer does not "see" the radio. Nothing happens more than the

Re: [Elecraft] K3 on JT-65, ALC varies widely

> I set the LINE IN gain to 30 (midrange). This is generally too high - I run between 10 and 15. The speaker output is set to 90%, Are you running the "bare" speaker output to the Line In or do you have a 10:1 (20 dB) attenuator between the speaker output and the Line Input? but there is

Re: [Elecraft] KX3 tuner getting stuck at 25.4:1 SWR

25.4:1 SWR is what the KX3 reads for a short or an open, if I remember correctly. Agreed, open it up, make sure everything is tight, include the ribbon cable. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Apr 17, 2017, at 11:20 AM, Don Wilhelm

Re: [Elecraft] KX3 tuner getting stuck at 25.4:1 SWR

I had a similar problem at Winter Field Day. Between the dummy load and the rig on a 3' patch cord, SWR wouldn't settle to 1.0:1. Cracked the hatch, looked around. Touched nothing inside. Put the KX3 back together, presto, SWR started behaving itself again. The ATU now matches to expected

Re: [Elecraft] KX3 tuner getting stuck at 25.4:1 SWR

Nate, Since the problem is intermittent, I would not suspect a problem with an active component. You might want to remove the bottom cover and check to be certain the hardware on the BNC jack is tight and the LPF on the BNC connector is properly positioned. You may have to lift the KXAT3

Re: [Elecraft] K3 on JT-65, ALC varies widely

I am working on this some more this morning. I set the LINE IN gain to 30 (midrange). The speaker output is set to 90%, but there is an amplitude slider in WSJT-X, and I adjusted that to 5 bars of ALC in WSJT Tune mode (constant 1100 Hz tone in this case). The K3 is definitely in DATA A

Re: [Elecraft] [P3] SVGA Option: transmitted text not visible on external display

Ok thanks!Any Idea if this will be implemented in the future?I was convinced that this will be the same as with PX3 where this is implementedTechnically, no issue, right? 73, Adrian, DH1AHL __ Elecraft mailing list Home:

Re: [Elecraft] OT - operating QRP at same park

I used to work Field Day with a friend in the two transmitter class. At our first Field Day, we had the usual problems as described by the original poster. Especially so because we were both running 500 watts. On our second and all subsequent operations we operated with one station on a

Re: [Elecraft] Elecraft] A little theory.

Thank you, Fred. Having one of the CNC knobs on my K3, I had forgotten about that. I did not realise it was causing such an issue. 73 de David G4DMP In a recent message, Fred C. Jensen writes >My K3 has one, it's around the Big Knob. >Fred K6DGW >Sparks NV DM09dn >David

Re: [Elecraft] Elecraft] A little theory.

My K3 has one, it's around the Big Knob. Fred K6DGW Sparks NV DM09dn David Pratt wrote: >Excuse my ignorance, Tim; maybe I am being naive, but could you explain >to which Elecraft products you are referring? I do not know of any 'O' >rings in any of my Elecraft transceivers.

Re: [Elecraft] A little theory.

Excuse my ignorance, Tim; maybe I am being naive, but could you explain to which Elecraft products you are referring? I do not know of any 'O' rings in any of my Elecraft transceivers. 73 de David G4DMP In a recent message, "k...@juno.com" writes > >A long time admirer. For me,

[Elecraft] A little theory.

A long time admirer. For me, his "O ring and a glass of ice water" demonstrationwhich kicked the air out of the NASA gas bags during theChallenger Disaster inquiry was most memorable. A remarkable man. 72, Tim Colbert K3HX 3 Things

Re: [Elecraft] OT - operating QRP at same park

Jack, W6FB, made a good point about resonant antennas. Going with this idea, separate resonant antennas should be used for each band, and mobile antennas, being high-Q may be particularly desirable. However, minus separate bandpass filters (to augment interference rejection), physical

Re: [Elecraft] OT: Leaky coax

Ken G Kopp wrote > Trivia: It's not unusual for a grain train to be much longer that the > tunnel through the Continental Divide. Reminiscing back to my third semester of Physics in college (Relativity), it depends on the speed of the train :-) Barry W2UP -- View this message in context:

[Elecraft] K3 for sale

Very nice Elecraft K3 for sale. SN #758 Included options are KPA 100, 100 watt module KT3A Internal antenna tuner w/2nd SO239 input KIO3, digital interface KRX3 second receiver module KXV3 Receive antenna interface option K3DVR Digital Voice Recorder K3FLA 250 hz CW filters 8 pole matching (2)

Re: [Elecraft] A little theory

The Berkeley Physic Series is wonderful. But, on a sad note, while I was at Fermi, I worked with Kambiu Luk, a researcher from Berkeley, I asked about that series, he said that it proved to be too difficult. Sigh! Jim - K7BIE > On Apr 16, 2017, at 10:04 PM, Phil Hystad