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Reviews Categories | Transceivers: HF Amateur HF+6M+VHF+UHF models - not QRP <5W | Elecraft K3s Help

Reviews Summary for Elecraft K3s
Elecraft K3s Reviews: 23 Average rating: 4.8/5 MSRP: $10W: 2300.- / 100W: 2900.-
Description: Elecraft’s state-of-the-art K3S transceiver offers a unique combination of ultra-high performance and affordability.

Both 100-watt and 10-watt (upgradeable) models are available. No-soldering kit; also available fully assembled and tested, the K3S is comparable in both features and performance to transceivers listing at up to six times its price.

In a first for the industry, the K3’s identical main receiver and subreceiver each feature a high-dynamic-range, down-conversion analog architecture. This allows Elecraft to provide roofing filters with bandwidths as narrow as 200 Hz, while up-conversion designs have roofing filters typically 3,000 to 15,000 Hz in width. Unlike some competing down-conversion designs, the K3 also provides 6-meter coverage, as well as continuous tuning from 0.5 to 30 MHz. Each receiver has its own bus-switching mixer, narrow ham-band front-end filters, 32-bit I.F. DSP, low-noise synthesizer, and up to five crystal roofing filters.

The K3S is the only deluxe transceiver that is targeted at both home and field use. Weighing just 8 pounds and having dimensions of 4” x 10” x 10” HWD (10 x 25 x 25 cm), it’s well-suited to demanding DXpedition or Field Day operations. Its receive-mode current drain of less than 1 amp greatly facilitates battery or solar-powered mobile/RV/marine installations. But unlike smaller portable transceivers, the K3’s user interface is optimized for ease of use, and its feature set rivals units many times its size and weight.

The transceiver is offered both factory-assembled and as a modular, no-soldering kit. Either way, K3 owners can start with a basic version of the transceiver, at lower cost, then easily add modules later, such as the internal subreceiver, ATU, and 100-W stage. To ensure identical performance of both pre-built units and modular kits, modules are 100% assembled and tested at the factory. Builders learn the radio theory behind each of the modules during assembly, and acquire skills that will enable them to easily add future modules or upgrades.

Two 32-bit digital signal processors provide true software-defined features, along with expansion memory to handle future signal processing tasks and operating modes. The operator will have full control over any operating situation, with 8-band receive and transmit EQ, stereo speaker/soundcard outputs, binaural effects, and advanced noise reduction. Also included is built-in PSK31, CW, and TTY decode/encode, so the operator can enjoy the excitement of data communications with or without a computer. The rig’s rich I/O complement includes an isolated sound card interface, front/rear mic/phone jacks, dedicated serial I/O, and band data. An optional module provides transverter in/out and RX antenna in/out jacks. The latter allow the use of RX-only, in-line filters for extreme operating environments.

Available options include: built-in 100-W automatic antenna tuner with two antenna jacks (KAT3), subreceiver (KRX3), general-coverage front end band-pass filter module (KBPF3), 100-W stage (KPA3), RF I/O unit for RX antenna, IF Out and transverter interfacing (KXV3A), digital voice recorder (KDVR3) and our all mode 2-m (144-148 MHz) all mode internal option (K144XV).
Product is in production.
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KA1J Rating: 5/5 Dec 10, 2017 15:01 Send this review to a friend
One fantastic rig.  Time owned: 6 to 12 months
So much good to say about this radio. It is spec-wise according to Sherwood Engineering one of the top radios in the world. Coming in at #2, it is thousands of dollars less than #1 and the differences are statistical. More importantly, Elecraft constantly updates their radios and provides parts and instruction to keep your K3s as current as the newest release. No other manufacture does that, they just keep on releasing a new radio for you to buy.

My back-up radio is one of the early K3 models, serial #202. It has all of the upgrades available to make it current with the last K3 produced before they went to the current K3s line.

I have been working the ARRL 10M contest today. My antenna is a wire vertical for 160M, I am running 1500W and I am hearing stations clearly that can not hear me, and I have a lot of neighborhood RFI. The receiver in this radio is just stellar. If they had a K3s, they would be hearing me; You can't work em if you can't hear em.

Elecraft's email reflector has the owners of the company in frequent Q&A & looking for feature requests, what other company making transceivers does that?

If Elecraft someday makes a K4, I will buy it, sell K3 #202 and replace it as my backup with this K3s. I've been a satisfied customer for the last 8 years and am more than happy with Elecraft & this K3s.


W8NWN Rating: 3/5 Sep 5, 2017 23:41 Send this review to a friend
not so great  Time owned: 6 to 12 months
I don't see what all the hoopla is about this transceiver......Overpriced, plain Jane screen, overpriced P3...I just don't get it. How can Elecraft expect to compete with the big 3?
WB8VLC Rating: 5/5 Sep 1, 2017 19:45 Send this review to a friend
excellent transceiver that replaced an Icom7300  Time owned: 3 to 6 months
I got this to replace a crap icom ic7300 that I had for a week and a half and boy is the k3s an order of magnitude above the icom junk.

The icom couldn't handle a neighbor 3 miles away without overload issue when we were on the same band.

Not the same with the k3s, I can now operate within 500 hz of my neighbor who uses a multi stack array on 6meters, stacks on 20 and a 4el on 40 with no receive problems.

Additionally, The k3s noise reduction features are top notch which was a major flaw with the crapcon 7300 which has mediocre noise reduction features.

I can now operate in a suburban neighborhood on the lower hf bands with the k3s and its amazing receive features whereas the 7300 just couldn't eliminate any of the typical urban noise sources and the 7300's receiver was constantly overloading even on moderate signals on all bands.

I won't leave out the k3s tx performance either, the audio equalizer for ssb, the essb feature, even AM and FM sound excellent on the K3S especially AM/FM something that sounded crappy on the Icom.

Other k3s pluses are The amazing cw features, both tx and rx, the built in soundcard and easy digital mode integration, dual receivers....
W8NWN Rating: 2/5 Apr 13, 2017 22:40 Send this review to a friend
k3s transmitter  Time owned: 6 to 12 months
This K3S has been to the factory 2 times for distortion. Has been a poor choice. Ca factory is too far away from WV to be practical.
W0SZ Rating: 5/5 Apr 2, 2017 19:56 Send this review to a friend
Long Time User  Time owned: 3 to 6 months
So I've been long time user of Elecraft products. I was a field tester of the K2 which was a fun experience and introduction to Eric and Wayne. I had an early K3 which I put together. I updated the radio with numerous modes and improvements. When the new Synthesizer board came out I put them in the K3 which made a significant improvement in CW. Anyway, I upgraded to the K3s about 3 months ago. I was doubtful that I would see any improvement between the K3 and the K3s. I have noticed improvement in the NR in the K3s. I was disappointed in the NR in the K3 but subjectively the K3s is clearly a great improvement and I use it most of the time. I really like the USB connection to the computer and sound card in the K3s. RTTY modes work quite well without using FSK demodulator and using AFSK. It is an expensive rig if you put in all accessories but compared to all the other rigs available the K3s is at the top of the list insofar as selectivity and ease of use. The VOX is the best I've ever seen and CW is amazing. CW and digital decode in the radio works amazingly well. I still have the K3 and will use it for trips and contests but the K3s will stay in my prime operating position. One of the best things about the Elecraft rigs is that you can add components as you desire and keep the rig current with mods as they come available without voiding the warranty or buying a new rig. I used most of the other rigs available including the SDR radios but the K3s is at the top of my list. 73
WJ1R Rating: 5/5 Mar 20, 2017 13:25 Send this review to a friend
Excellent Radio  Time owned: more than 12 months
I have had this radio for more than a year since I assembled the kit. It is a truly remarkable radio. The noise blanker on CW does an amazing job in reducing by about 3 S units noise on 20m from an array of solar panels about 800 feet from my antenna. The roofing filters are also able to eliminate interference from strong CW signals a few hundred hertz away in contests and can similarly eliminate interference from close SSB stations.

I waited for the K3S because I did not like the sound of the speaker in the K3. I have not been disappointed. The radio's built-in speaker has a high quality full sound comparable to my old Kenwoods and Icom 756 Pro. In this regard, the 8 band receive equalizer allows you to tailor the signal to your liking.

I use a Heil HM-12 mic. It took some effort to set the 8 band transmit equalizer to the SSB transmit quality that I like, but I now receive compliments on my transmit quality. This radio has a great deal of flexibility that allows you to alter various radio characteristics to your preferences.
W8NWN Rating: 5/5 Oct 27, 2016 18:58 Send this review to a friend
Kit building experience   Time owned: 0 to 3 months
As a kit, it was easy for me. I come from the old HeathKit era. I have built a lot of kits in my day but that was a long time ago, so today if you have a hard time with tiny screws and small parts, better get a factory built one. Here's a little hint: If you combine the stainless screws with the zinc ones by mistake, use a magnetized screwdriver to separate them.

The paint, fit and finish on the panels are the best I have ever seen. Individually wrapped. Excellent!. All the hardware, screws etc are very high quality and not the cheap Chinese stuff you see in the marketplace. It all goes together perfectly. If something doesn't go together right, you've done something wrong!.....

A very expensive radio. One can save a little by ordering the kit version. Which I did.

Suggestion: Elecraft needs an ordering warehouse someplace in the mid west. California is just too far away and shipping costs are too high. Elecraft might sell more radios on this fact alone.
W8MSP Rating: 5/5 Oct 4, 2016 10:03 Send this review to a friend
Simply the best  Time owned: 0 to 3 months
Bought a K3S kit about 3 months ago. Easy to assemble great directions.
Wow is all I can say about performance, pulling out weak stations is pretty easy. Recently purchased a used P3 from an estate sale with an SVGA card and together the K3S and P3 are amazing. Seeing the weak ones I am able to hear and seeing how weak they really are proves the value of the K3S and at the same time proves how valuable the P3 is.
I am extremely happy with both purchases.
M6LDZ Rating: 5/5 Sep 12, 2016 02:50 Send this review to a friend
Takes the KX3 experience furthe  Time owned: 3 to 6 months
Having built the KX3 a few yers ago I love the flexibility, the ability to update the firmware and add modules and accessories to it. So when a K3S came availabe as an SK sale I jumped at the chance.

It is intended as a portable contest radio for use with transverters as well as HF. In both roles it excells. Transverter setup is simple and once you have got to grips with the menu structure quite logical. Performance is a tad better than my FT500 but I miss the second receiver (which is now on order).

I have added the Kpod which gives great funcionality for writing macos and linking commands. As an early radio it needed a resistor solderd inside - heart in mouth time!

So in essence . Yes it's all it is cracked up to be and I hav eno regrets. The biggest plus, the fact you can tailor it to your owne needs and fiddle about inside adding things.

W9TVX Rating: 5/5 Jul 16, 2016 19:31 Send this review to a friend
K3S 1 Year Update  Time owned: more than 12 months
I have owned an Elecraft K3S for just over an year and this ‘update review’ is a follow on review to my initial impressions review of the K3S (which I believe was the first review of the K3S on eHam)

While I continue to give this radio a 5/5 rating in this review, as I mentioned in my first review, I think eHam's rating system is not granular enough. Nothing is perfect, and I would given the radio a rating of 4.8/5.0 if I were able to do so.

As usual I’ll first provide a little info on my station setup:

Radio: K3S equipped with: 100W upgrade, ATU, TCXO 0.5ppm, FM/2.8/400Hz/250Hz 8 pole filters Gen Coverage RX, Digital Voice Recorder, Ext 10MHz ref input, 2nd Receiver with 2.8 8 pole filter. In addition, I have two Elecraft SP3 speakers with which I am particularly happy. Recently I added a Elecraft K-Pod to my operating setup. The jury is still out on this accessory.

Antennas: Traffie 5 band Hexbeam at 35ft, ground mounted Steppir BigIR vertical with 42 radials - used primarily on 40m & 6m .

Amplifier: Expert 1.3K-FA solid state linear amplifier (I also reviewed this here on eHam)

Panadapter: QS1R SDR connected to the K3S's RX-OUT via a Stridberg MCA102M multicoupler and a DX Engineering Receiver Guard 5000. I also have a Telepost LP Pan 2, but I find the QS1R to be a much more useable setup. I did iniitally purchase a P3 with the K3S, but have since sold it and returned to exclusively using the QS1R. (I will shortly posted a P3 review on eHam along with the reasons on why I sold it)

Software: I started by using HRD 6.3 with the K3S, then moved to a combination of Win4KSuite, Log4OM, and DM780. Ulitmately, I ended up moving back to HRD 6.3 since it seems to involve the fewest moving parts and interfaces in my station setup. For contesting I use N1MM+, and for JT9/65 I use WSJT-X and JTAlert.

You can read more about my setup at

Over the past year I have continued operating primarily Voice and Data modes specifically: PSK, JT9/65, RTTY, and Olivia. I am NOT a CW operator - yes I know: ‘shame on me’. I have entered several contests including the CQ WW WPX and CQ WW DX contests, and have been very satisfied with the K3S’ performance in quite rigourous contesting environments. In addition, interfacing the K3S with digital software such as WSJT-X, fldigi, and DM780 for digital modes is trivial thanks to the USB port and built-in sound card provided by the KIO3B board which comes standard with the radio. This past year my operating mix has been about 60% digital and 40% Phone, mostly due to band conditions at my QTH. Typically I operate 60% Phone and about 40% digital.

I currently use both a Kenwood MC-90 microphone and a Heil Proset with my radio. I have spent time tuning the mic gain, compression, and TX Equalizer settings for each microphone and am happy to report that I get consistenly good audio report. In particular, the MC-90 seems to solicit the most complements.

One of the common complaints about the K3(S) is that received audio can be harsh. I have not had this experience with my radio either with the SP3 speakers nor my Heil headset. Again, I spent the time tuning the radio for each setup. I completely understand that perceived audio quality is extremely personal and what is pleasing to one may be grating to another. With this in mind you mileage may vary

Prior to the K3S I owned a Kenwood TS990S. When I first moved to the Elecraft from the Kenwood, I was very concerned about losing the large display and plethora of front panel knobs on the Kenwood to the spartan display and much smaller front panel of the K3S. As I mentioned in my first review, I was initially dismayed at the loss of direct access to most of the radios functionality; however, I rather quickly realised that the K3S was actually quite intuitive and that many, if not most, of the functions were set and forget, with all the most important functions in fact being directly accessible from the front panel of the radio.

I’m happy to report that this has remained true over the past year. Operating the radio continues to be both intuitive and very easy. To be fair, much of this is certainly due to my increased familiarity with the radio, but it is equally true to say that the logical and well thought out radio layout and software on the K3S has significantly help contribute to this familiarity.

While I do use a computer interface (HRD 6.3) to the radio, for the most part I tend to use the front panel buttons while operating the radio. Primarily, I use the VFO-A knob, TUNE button, NTCH button, passband knobs, and AF pot on a daily basis. Less frequenlty, I use the split operations buttons and VFO-B knob. I rarely if ever have to deep dive into the menus since I initially setup the radio. HRD 6.3 allows me to see the state of the radio at a glance (mostly the current power setting), and more importantly allows me to define software macro’s for setting such things as microphone grain, compression, and EQ settings at the press of a button. This is highly useful when switching between my MC-90 microphone and Heil Proset headset which require different setting for the aforementioned parameters

Of course nothing is perfect, and I wish that there certain features provided on the radio (some of which I discussin my first review and will repeat below.)

- In order to determine the current power output of the radio. One has to either rotate the PWR pot or view it on a third party radio control software. I would argue that the radio’s current power output is a primary piece of information and there are at least a couple of places where Elecraft could make this information available: The first is that there seems to be room to the right of the main VFO frequency display to display the current power setting. Should this not be possible another option would be to make is available as one of the items in the dispay rotation (currently the user can by tapping the DISP button either display the freqency of VFO-B - in which case the VFO-B knobwill change the VFO-B frequency - or with another tap a host of other information such as time, date, voltages, etc. This information may be cycled through usingthe VFO-B knob). Regardless, I’m sure Elecraft could find a way to more readily present this information

- The ability to to save and recall multiple audio profiles. By audio profile I mean RX & TX equaliser settings as well as microphone gain and compression settings. I switch between Kenwood MC-90/Elecraft SP3 speakers and a Heil Proset depending on if I am ragchewing or contesting. Each of these setups requires a different audio profile. Currently if I wish to use the radio’s front panel, I have to manually go in and setup each element of the profile each time I switch. One idea would be to add a menu option to save/recall audio profiles. Then long pressing a keypad digit would save the current profile, and tapping it would recall it. Bonus points for being able to name the profile on saving. Also bonus points for being able to assign the menu item to a PF key such that tapping the PF key will cycle through the saved profiles.

- The ability to quickly recall current settings. By this I mean: The current passband, the location of the notch filter, mic gain and compression settings. Personally, I would like it if a second tap of the DISP button would provide the ability to see this kind of data. Even adding them to the DISP information loop - as I mention for power above - would be useful

- Ability to be able to lock the Compression+Mic and Power settings separately. Today it is possible to lock all three, but in reality once I have my gain and compression set for a given operating mode, I am unlikely to change it while I am far more likely to change power e.g. when placing or removing a linear amplier in the transmit loop. Currently, It is quite easy to in the heat of battle accidently reach for the MIC knob when intending to turn the PWR knob - at least for this operator - which can be quite annoying.

The good news is that I think the above could all for the most part be implemented in firmware, and I eagerly and with baited breath await their implementation - I certainly hope I don’t turn blue and passout

In my first review, I did complain quite a vocally about the VFO-A knob. To quote:

‘One thing that I do not like about the K3S is the VFO-A knob. When I compare this to the Kenwood knobs, it feels awful. In particular, the way the tuning resistance is provided by using felt pads feels... well like two felt pads rubbing together. I know that this is probably lightweight and the radio is used on DXExpeditions; however, there must be a better way solution’.

Since that review, the knob seems to have ‘broken in’ somewhat, and while it is by no means great, it is better than it was when I first received the radio. I still feel that there is room for improvement and will say that many of the Japanese radios costing far less that the K3S do a better job.

In summary, after having owned this radio for over a year, I continue to be very pleased its performance and usability. The K3S is not a cheap radio, easily approaching six thousand dollars when purchased with the bells and whistles. Sitting in the shack it in no way has the commanding look or feel of the flagship radios from the big three Japanese vendors. However, this is without doubt a case of ‘Dont judge a book by its cover’. For each time I operate the K3S, I continue to realise that it is a very special radio that does all the important things extremely well. Finally, I usually become bored with a radio after about a year, and find excuses to start looking for the ‘next best thing’ with which to replace it. Quite honestly, this is the first time I have remained delighted with a radio and continue to look forward to using it on a daily basis. This, in this operators humble opinion, makes it worth every penny for which I paid for it.

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