K3 Transceiver
Overview
Product sourcing insights & recommendations
The Elecraft K3 series continues to hold a dominant position in the high-end amateur radio market despite its official discontinuation in 2020. While the K4 has taken over as the modern flagship, the K3 and K3S remain highly sought after for their tactile controls and superior receiver performance in high-RF environments. Sourcing for official accessories like the KAT3A antenna tuner and P3 panadapter has become increasingly difficult, leading to a robust and high-value secondary market. Detailed insights on pricing tiers, component scarcity, and competitive benchmarking are available in the report below.
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HamGeek PMR-171 100KHz-2GHz 20W SDR Transceiver VHF UHF HF CW AM SW Mobile Radio Version 2 + DMR Module

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Shenzhen Gegu Dingxin Technology Co., Ltd.🇨🇳CN1 yr
OEM USDX USDR HF QRP SDR Transceiver 8-Band 5W DSP SDR SSB/CW Transceiver with Blue/Black/Red Shell Mic For Ham Radio
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USDR SDR High-Frequency Radio Transceiver, QRP 8-Band USDX Transceiver L711
Shenzhen Chuangheying Electronic Technology Co., Ltd.🇨🇳CN5 yrs
Upgraded version of USDR USDX+Plus v2 8-band SDR full mode HF SSB QRP transceiver
Shenzhen Shengdingtong Technology Co., Ltd.verified🇨🇳CN1 yr
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Sources & References
24 sources cited · Verified industry data & reports
K3S Transceiver – Elecraft
elecraft.com
K3/0 and P3. These will be the last two K3 Options we build, as they are more complex and are taking more time to source key parts, sheet metal, displays, etc. We will update the shipping status on these after we begin shipping the other K3 options listed above. We have closed the K3/K3S Options/Accessories order form so we can finalize material orders. Due to minimum material purchase requirements by our suppliers, we may have excess material that will allow us to build more products than was ordered. If you are interested in purchasing a K3/K3S Option/Accessory, please email Sales@elecraft.com and provide your name, email address, phone number, and the products you are interested in purchasing. K3/K3S Options/Accessories: P3 Panadapter Factory Assembled, Factory Assembled P3SVGA Video/FFT Adapter P3TXMON P3 Transmit Monitor K3/0 Mini Remote Control Panel, Factory Assembled K144RFLK K144XV Reference Lock Board K144XV 144-148 MHZ 10W Internal Module K3EXREF Ext 10MHz Ref Input KAT3A 100W ATU KDVR3 Digital Voice Recorder KPA3A Internal 100W Upgrade KIO3BUPKT KIO3B Upgrade Kit KSYN3A Upgrade Kit for K3 KBPF3A General Coverage RX Band-pass Filters KXV3B Transverter Interface upgrade for earlier K3 radios If you are interested in the KRX3A High-Performance Subreciever, we are still attempting to source material. Elecraft’s state-of-the-art K3S transceiver offers a unique combination of ultra-high performance and affordability. The factory-assembled 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 K3S’s identical main receiver and subreceiver each feature a high-dynamic-range, down-conversion analog architecture.
K4 Transceiver – Elecraft
elecraft.com
In particular, operators who’ve used our K3S transceiver and P3 panadapter will find the K4’s controls familiar, and its complement of I/O compatible with their existing station. But they’ll also discover a new level of convenience in the bright, 7” touch display, which combines a large panadapter with three intuitive multi-function controls. Power output is nominally 100 W (10 W for the QRP version). The KAT4 antenna tuner has 3 jacks, and there are up to 5 receive antenna sources. I/O is extensive, including video output, Ethernet, 4 USB ports, and a superset of K3S analog and control connections. Elecraft is committed to providing dual-use transceivers, even at the high end, in support of Field Day, DXpeditions, RV travel, etc. At 4.5 x 13.5 x 11.0” (less projections) the K4 is larger than a K3S, but it still weighs only about 10 pounds. It’s also very power-efficient for a radio in its class (2 A typical on RX) and can run from as low as 11 V, e.g. A: The K4 retains virtually all of the operational features of the K3S and P3 while adding direct-sampling technology, wide-range dual receive as a standard feature, advanced I/O, and a large (7”) display with touch capability. With its high level of system integration, the K4 takes up about 4” less desk space (horizontally) than a K3S + P3.
K3S Transceivers – Elecraft
elecraft.com
Transceivers – Elecraft
elecraft.com
K3/K3S Options Updates06/01/24 ...
Elecraft
elecraft.com
I have finally arrived at a wonderful configuration: K3S, P3, KPA500, and KAT500. I find it is absolutely marvelous, with pain-free system integration-it is like having a 500 W transceiver and broadband antenna covering 160-6 m. Happy owner of K1 - K2 - K3 - K4 - KX1 - KX2 - KX3 - KPA100 - KPA500 - P3 - PX3 and some accessories...I got hit by Elecraft bug two years ago and couldn't resist to get them all! I own a K3, Kx3, KX2, P3 and a PX3. Love your products and have never experienced any problems with any of them. My preference is always low power and QRP and never do I exceed 100 watts. Congratulations, Clipperton 2024 Team!
KX3 Transceiver – Elecraft
elecraft.com
