Re: [Elecraft] K3S QST Article

Without too much elaboration let's just say that I discovered this problem long before ARRL did. (S/N 10020) I can tell you that my measurements show that IMD varies with Vcc (Vdd), drive level, power output and frequency. This latter parameter is, as best as I can determine, inexplicable

Re: [Elecraft] K3S QST Article

OK. I purchased the K3/10 in 2010 which is able to output up to 12w. Is the low power amp any better at IMD, or subject to the same limitations because its 12v transistors? I bought the KXPA-100 last year. Would it be any better than the KPA3 or KPA3A? 3rd-order IMD in the vicinity of -30

[Elecraft] K2 Serial Port Question

While I continue to review the list archives, I am requesting feedback from the group with regard to possible failure modes of the KIO2 board. This rig is in loan to me, with the loaner stating that it was claimed working when he acquired it from a previous owner, but had not himself tested

Re: [Elecraft] OT Rotatable Dipole Project

Thanks for the flowers Ron. The one compromise I ended up making was not getting the aluminum up a full half wave in the air. Fully half the directionality is down a steep hill, so electrically it meets that criteria. However the other half is back into the hillside so in that direction not

Re: [Elecraft] OT Rotatable Dipole Project

Actually I should have said 130 feet up! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau Claire Sent: Friday, October 14, 2016 7:43 PM To: 'Elecraft K3'; 'Mailman' Subject: Re: [Elecraft] OT Rotatable Dipole Project

Re: [Elecraft] K3S QST Article

Yaesu FT-990, 12V finals 3rd order TX IMD -38dB ARRL Review 11/91 ARRL heaped glowing praise upon this rig way back in 1991 for its Tx IMD performance. So, what was Yaesu's secret, and why haven't manufacturers figured it out and capitalized on it ever since? Dave Hachadorian, K6LL Yuma,

Re: [Elecraft] OT Rotatable Dipole Project

Beautiful installation Eric. A rotatable dipoles offer an advantage when they are up high enough (>1/2 wavelength) to provide significant directivity. Unfortunately that is a little difficult for most of us on 80 meters where the antenna is 130 feet long and needs to be 65 feet up, but some have

Re: [Elecraft] OT Rotatable Dipole Project

Rotary dipoles work! It's remarkable how directive a dipole can be. And you don't have to worry about LP vs. SP propagation. I also have a full size 20m version. I wrote an article about how I made it work on all the bands from 40-10 meters with high power (1.2 kW):

Re: [Elecraft] K3S QST Article

Or, we could all run 32S-3 transmitters and listen on our whiz/bang SDR. So far, they're about the cleanest 100 watt transmitter reasonably available. 73, Charlie k3ICH -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kevin Sent: Friday,

Re: [Elecraft] K3S QST Article

The cause for this is the use of 12V finals. It would be much improved by moving to 24 or 50V finals. Move the /K3s II/ to 50V finals, say a pair of MRF 150's, limited to 150 or 200W max output. Design/Sell an outboard 50V switching supply capable of 15-20A continuous current, with a 10A 12V

Re: [Elecraft] KXPA100 with Other Radios

Jose, See page 18 of the KXPA100 manual. Yes, you must provide a connection that grounds the PA KEY connection to the KXPA100. I do not know of a commercial cable that will provide KEYOUT from the Flex to the KXPA100. If you are not able to build the cable yourself due to whatever

[Elecraft] OT Rotatable Dipole Project

Hello List, Sorry for the OT posting but I want to share my new antenna. My K3 and this antenna have been a joy to operate. Here is the blog on it for anybody who might be interested: http://hankstamper.tumblr.com/post/149327414925/full-sized-20m-rotatable-dipole-project 73 de Eric, KG6MZS

[Elecraft] KXPA100 with Other Radios

I am a happy KX3, KXPA100 owner. I had the opportunity to obtain a Flex-1500 radio. I want to use the Flex-1500 with the KXPA100, since the Flex is a qrp radio. My question: Do I have to have a cable running into the KXPA's PTT plug or can the KXPA100 be keyed up by the Flex-1500 via just

Re: [Elecraft] e: Windows Emulator

There is a WSPR-X app for the Mac. Bob, N7XY On 10/14/16 10:56 AM, Brian Pietrzyk wrote: I worked in the IT industry and worked intensely with Windows since the pre DOS days. I transitioned to Mac about 6 years ago and it has been my primary OS since. I find I rarely need windows for much

[Elecraft] Fwd: NaP3 version 5

__ 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:

Re: [Elecraft] K3S QST Article

> Based upon your experience and understanding of the issue, would an original > K3 (not K3s) with the new synths have better TX IMD? In other words, is the > poor TX IMD of the K3s a function of some part of the rig not associated with > the new synths? > > Dave AB7E Hi all, This has

Re: [Elecraft] Is the K3 have low sensitivity on 10 M and 6 M

I have always done the same thing with signals at the noise floor, or below. The biggest change I've noticed by doing this is the band noise is much more attenuated through the headphones lying on the table and the signal one is trying to copy jumps out in the clear since band noise is

Re: [Elecraft] Is the K3 have low sensitivity on 10 M and 6 M

Interesting point ... Right after getting the new synth for my K3, I was copying a number of WSPR stations on 630 meters. I even got up in the middle of the night to see if I could hear them [I couldn't] as the computer copied them at - 10 to -15 dB SNR. At first consideration, I don't see

Re: [Elecraft] K3S QST Article

I would not expect the synthesizer (old or new) to be a contributor the IMD issue. Hopefully someone will correct me if that is a bad assumption. To me, the primary issue appears to be the linearity of the two RF power amplifiers. During the course of my troubleshooting, I noticed that a number

Re: [Elecraft] K3S QST Article

Hi all, I, too. prefer the paper copy, but the mention of a K3S review got me too intrigued, so I had to read it online. As for the other comments in this thread, I find this situation more than a little worrisome and certainly an official Elecraft response is hoped for. Are the updates being

[Elecraft] e: Windows Emulator

I worked in the IT industry and worked intensely with Windows since the pre DOS days. I transitioned to Mac about 6 years ago and it has been my primary OS since. I find I rarely need windows for much else then programming my radios and a few apps such as WSPR. The rest I can do on Mac. If

Re: [Elecraft] R: K3s vs K3's

I believe the new radio is a K3S, not a K3s. Elecraft use the upper case "S" in a smaller size for the logo. Now I don't know how to tell a lower case "s" from an upper case except for size. Go figure. Sent from my iPhone ...nr4c. bill > On Oct 14, 2016, at 11:20 AM, Joe Subich, W4TV

[Elecraft] K3S vs K3s

When Rose does the embroidery on a case or cover for a K3s she always gives the customer the option of which "s" to use. She has both versions set up in her machine's software. The size of the "s" meets Elecraft's "specs", BTW. So far she's not had an order for a K3S cover or case. 73! Ken -

Re: [Elecraft] Elecraft] R: K3s vs K3's

In the Lao (and Thai) language, there are no plural forms. It would be either "K3s" meaning one, or "n K3s" where n is the number of radios. English is as obscure as C. 73, Fred K6DGW Sparks NV Mark via Elecraft wrote: >Re:   >> use the terms K3's or K3s'<< >

Re: [Elecraft] K3S QST Article

Based upon your experience and understanding of the issue, would an original K3 (not K3s) with the new synths have better TX IMD? In other words, is the poor TX IMD of the K3s a function of some part of the rig not associated with the new synths? Dave AB7E On 10/14/2016 9:06 AM, Bill

Re: [Elecraft] R: K3s vs K3's

Re:   "Wayne posted this message early in the K3S era..." Good find, Phil.  I think that would make more than one K3S be K3S's.  That is just my opinion and it is free, so take it for what it is worth.  Mr. Websters rules were not free.  I had to pay for them.   Mark, KE6BB

Re: [Elecraft] K3S QST Article

I was not surprised to see a comment about the Tx IMDs in the QST article. One of the first problems I encountered with my new K3s/10 was poor Tx IMD performance. What I observed was flat topping that started at about 5W, and progressively got worse as the power was increased. The distortion was

Re: [Elecraft] R: K3s vs K3's

Re:   >> use the terms K3's or K3s'<< >Grammatically incorrect.  Use of the> >apostrophe indicates possessive< Well, not always.  Websters New World Dictionary (mine is a 1965 edition and getting pretty used up) lists six uses for the apostrophe, with number six being: "6)  in the forming the

Re: [Elecraft] R: K3s vs K3's

Wayne posted this message early in the K3S era: -- *List: elecraft Subject: Re: [Elecraft] K3s and K3S. From: Wayne Burdick Date: 2015-05-14 21:55:23

Re: [Elecraft] K3s vs K3's

In text, on the website, etc. Elecraft calls the new radio the K3S — capital “S". So 2 K3s or 2 K3Ss, would be clear — presuming cats can be herded well enough to manage a bit of consistency ;) Grant NQ5T K3 #2091, KX3 #8342 > On Oct 14, 2016, at 11:20 AM, Joe Subich, W4TV

Re: [Elecraft] R: K3s vs K3's

> use the terms K3's or K3s' Grammatically incorrect. Use of the apostrophe indicates possessive as in "belonging to the K3 or K3s" - for example "the K3's VFO A knob". 73, ... Joe, W4TV On 10/14/2016 10:59 AM, Charlie T, K3ICH wrote: Due to the odd way Elecraft chose to label the new

Re: [Elecraft] R: K3s vs K3's

Due to the odd way Elecraft chose to label the new K3s, I would request that when referring to multiple radios, use the terms K3's or K3s' rather than simply K3s which implies a single radio. 73, Charlie k3ICH __ Elecraft mailing list

Re: [Elecraft] R: Re: K3S - K3 Noise Blanker and Noise Reductor

Great advice Don. (Nice website too.) One little point I would add to comments about listening to whether you hear band noise when connecting that antenna, is that if you're performing this test at VHF, or even the high end of the HF, the actual connection/disconnection of the antenna should

Re: [Elecraft] Is the K3 have low sensitivity on 10 M and 6 M

This test may be a bit out of date. With digital modes decoding signals ~10 db below the noise these days, one may need at least two S-units of noise. 73 de Brian/K3KO On 10/14/2016 0:04 AM, Fred Jensen wrote: Re #3: I never have either. While a thorough analysis of "To Preamp or Not to

Re: [Elecraft] R: Re: K3S - K3 Noise Blanker and Noise Reductor

Ian, Your AGC SLP and AGC THR menu settings are contributing to the noise response of your K3S. I recommend you increase the AGC THR setting and decrease the AGC SLP. Look at my website www.w3fpr.com "Noisy K3" article. It will give you guidelines for setting those AGC parameters to best

Re: [Elecraft] K3S QST Article

Hi Knut, Yes, I get a notification about the digital issue, but I prefer to read the paper copy, so I wait. It did come yesterday so I've seen it now. Wes On 10/13/2016 5:35 PM, ab2tc wrote: Hi Wes, You can read it online. I received an Email link from ARRL to my online copy. AB2TC -

Re: [Elecraft] Microphone

The point is: Using most any mic - from $10.99 to $500.00 - because it is all in the way you set up the K3(S). Want a really super looking broadcast mic? Buy a $3 electret module and build a mic case to suit your visual dreams. Plastic, PVC, wood, resin, and IMAGINATION - and you rule! Bill

Re: [Elecraft] Microphone

On 13/10/16 20:40, Arie Kleingeld PA3A wrote: > As far as mic-audio is concerned: how much hi-fi can you put through a > 2.5kHz bandwidth SSB signal? Not much. But there's more to microphone quality than frequency response. 1. Plosives. Will the mic handle poppy 'p' sounds without overloading?

Re: [Elecraft] Interlocking two K3

Aren't those just virtual widgets that you stitch together in a software package drop some pins down and download to your FPGA ? You'd have to be old enough to know they started as silicon, I'm sure I can find the masks or some bare dies for those here at work (*wink*). 73 Matthew VK5ZM On 14