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        Tuned LoRa antennas that maximise coverage for IoT devices, Meshtastic nodes or other 868 MHz applications.

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        Power meters, antenna analysers and other instruments.

      • ModMic

        ModMic is an attachable / detachable boom microphone using a uni-directional capsule with efficient noise-cancelling perfect to be used in a noisy  DX or contest environment. Attach it you your favourite noise cancelling headphones and you have the perfect ham radio headset with a high quality communications microphone. Its characteristics makes the microphone pick up more of you and less of the room by attenuating the background noise from amplifier fans, street noise or other operators. The brand new ModMic line for 2020 builds on the success of the original ModMic and introduces ModMic Uni, ModMic USB and ModMic Wireless. FT4JA, Juan De Nova 2016 Expedition made 45.273 QSO using the ModMic sponsored by Pileup and Antlion. Read the feedback from the FT4JA team here.

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  • Brands
    • A-D
      • ANjo

        ANjo Antennas are developed and manufactured in Germany to the highest electrical standard and mechanical accuracy. EFwire, end fed multiband wire antennas require less space than center fed dipoles. The feed point is conveniently located at the end of the antenna and attachment point making the EFwire antennas light and discrete. ANjo’s EFwire antennas are resonant, in most cases no tuner is needed. ANjo Antennen – Präzision aus Deutschland!

      • Chameleon Antenna

        VERSATILE – DEPENDABLE – STEALTH – BUILT TO LAST The Chameleon Antennas are made with the finest material available. They can be used for multiple purposes such as Mobile, Portable, Base station, Marine, EMCOMM, MARS/CAP, ARES, SATERN, RACES, First Responders, Emergency Preparedness, Skywarn, Military & Government communications and much more.

      • DIY599

        DL4KA Project – Creator of the ultraportable PA500 Power Amplifier and the companion BAT500 battery to power your QRP operation and digital emergency radio communication. The complete solution to conquer limitations!

      • DX Engineering

        Whether you’re DXing, contesting, or enjoying everyday operating, DX Engineering designs and builds reliable, fully tested products that deliver proven performance and outstanding value. Every product is developed to meet specific needs and provide measurable benefits.

    • E-H
      • Expert Electronics

        NOTE: Due to the current situation, we do not accept orders for items not in stock!  Expert Electronics develop and manufacture Software Defined Radio equipment for ham radio and professional radio applications. The company has served the Russian market since 2009 and manufactures products for export in Taiwan since 2015.  All Expert equipment is controlled using ExpertSDR3. This software package is user friendly yet very capable, it sports an intuitive and clear layout. The software has two independent receivers, each with its own sub receiver for a total of 4 receiver slices. Each receiver can be independently controlled via CAT for SO2V or SO2R. All Expert Electronics transceivers and receivers can be remotely controlled using the Expert Remote System. Internet connection through DSL or mobile 3G/4G/5G supported.

      • FlexRadio
      • HanRongDa

        Shenzhen Hanrongda Electronic Co.,Ltd design and manufactures many different types of radio receivers. We carry a few models of special interest to our customers including the HRD-747 mini radio with 0.52-520 MHz AM/FM/SSB coverage and the tiny HRD-767 pocket Air band receiver.

      • Heltec Automation

        HELTEC’s WiFi LoRa 32(V3) is one of the smallest, most affordable and most popular devices for Meshtastic Nodes. The new “Capsule” open up new possibilities for portable Mesh Networks. Heltec Automation was founded in 2014, and is a team with enthusiasm and creativity. The current business is mainly in the following two sectors; 1. Internet of Things (IoT) 2. Clean Energy Components  

    • I-L
      • INRAD

        International Radio (“INRAD”) is a classic manufacturer of aftermarket products for transceivers and receivers from the 1960’s to the present day. The recent introduction of the INRAD line of microphone and headset products is the first of many new offerings coming in the future from this long standing brand name.

      • icom

        Icom breaks new ground with their direct sampling SDR transceivers for serious DXers and contest operators.

      • JNCRadio

        JNCRadio/Chelegance is a young and aspiring amateur radio company with products branded JNCRadio, as well as joint-effort products and outsourcing products from third parties. JNCRadio is owned and operated by BD7LLY, an active operator with a passion for SOTA.

      • Lab599

        Lab599 is an innovative radio manufacturer known for designing high-performance transceivers built for adventure, extremes, and challenging environments—places where other radios can’t go. With no compromise on performance, reliability, or feature set, Lab599 transceivers are engineered for operators who demand the best, whether at home or off the grid. Pileup Communications is the exclusive distributor of Lab599 products in Europe.

      • Low Band Systems

        NOTE: Due to the current situation, we do not accept orders for items not in stock!  Low Band Systems manufacture high performance band pass filters, multiplex filters and antenna components for RX and TX antenna systems. Share a tri-bander with three transceivers simultaneously using a PerfoBox Triplexer and PerfoBox Band Pass Filters. Build your RX antennas using LBS antenna components, RX antenna switches and receive preamplifiers. Tune your 160 meter vertical to be used also on 80, 40 and 30 meter bands. LBS is a proud sponsor of the 3Y0Z DXpedition to Bouvet island. 3Y0Z will use PerfoBox 1500W Band Pass Filters for HF + WARC bands, custom designed matching units for 160 and 80 meters bands vertical antennas.  LBS will also supply a custom designed receive antennas distribution system. Pileup Communications is the exclusive distributer of Low Band Systems for Scandinavia (Sweden, Norway, Denmark, Finland, Åland, Iceland and Faroe Islands). Read the QST March 2017 review of Low Band Systems HF Triplexer and Band-pass Filters here.

    • M-P
      • mAT-Tuner

        mAT-Tuner is dedicated to design and production of high quality automatic antenna tuners. Since 2013 several HF tuners have been produced, each with its own focus to suit different application environments. mAT-Tuners have a wide impedance tuning range that lets you use more different type of antennas, it tunes fast, and it has a good looking and solid appearance.

      • Meshtastic

        Meshtastic® is a project that enables you to use inexpensive LoRa radios as a long range off-grid communication platform in areas without existing or reliable communications infrastructure. This project is 100% community driven and open source! Operating on 868 MHz using LoRa devices, it’s ideal for off-grid comms in remote areas, disaster zones etc. It creates resilient networks, with each device acting as a node and router, transmitting data directly between devices for enhanced privacy and security. Explore all RAK Wireless Sensors and Accessories Meshtastic® is a registered trademark of Meshtastic LLC. Meshtastic software components are released under various licenses, see GitHub for details. No warranty is provided – use at your own risk.

      • ModMic

        ModMic is an attachable / detachable boom microphone using a uni-directional capsule with efficient noise-cancelling perfect to be used in a noisy  DX or contest environment. Attach it you your favourite noise cancelling headphones and you have the perfect ham radio headset with a high quality communications microphone. Its characteristics makes the microphone pick up more of you and less of the room by attenuating the background noise from amplifier fans, street noise or other operators. The brand new ModMic line for 2020 builds on the success of the original ModMic and introduces ModMic Uni, ModMic USB and ModMic Wireless. FT4JA, Juan De Nova 2016 Expedition made 45.273 QSO using the ModMic sponsored by Pileup and Antlion. Read the feedback from the FT4JA team here.

      • OM Power

        OM Power was founded in 2004 as an initiative of two enthusiastic Slovak ham operators. Since then the company has become a successful and well established manufacturer of highest quality amplifiers. OM Power amplifiers are found on all continents and in almost every country of the world. A wide range of amplifiers are being produced by OM Power. For HF bands ranging from the 2 kW manual tune OM2000+ to the 4kW automatically tuned OM4001A and for 2 meter the water cooled 1.8 kW OM2002W. OM-Power amplifiers are built on order to ensure that you get the latest hardware and software version with your delivery. Normal delivery time  is 2-3 weeks. Contact us for more information and a competitive offer. We will be happy to help you select the best amplifier for you to cut through the pileup.

      • Paradar Antennas

        Tuned 868 MHz LoRa antennas that maximise coverage Need to maximise coverage for your MeshTastic node or other demanding IoT, LoRa deployments? Paradar’s extra-strong fibreglass antennas feature a precisely tuned pure copper feedline, to maximise coverage in 868Mhz European deployments. For even longer range or distant point-to-point applications Paradar’s Yagi Antennas is the best choice. For indoor applications the 5 dBi whip antenna run circles around the cheaper import antennas. The low loss and extremely low SWR (as low as 1.05) of Paradar antennas mean that every milliwatt of power is focused efficiently, for maximum range.

    • Q-S
      • QRP Lifestyle

        QRP Lifestyle by DL1DN builds simple but efficient QRP antennas including telescopic whip antennas for 40-10 meter bands that mounts directly on the transceiver, ultra-portable Moxon antennas for 10/11 meter bands and 2m/70cm bands. Clever antenna accessories is also part of the QRP Lifestyle portfolio.

      • QRP-UPS

        QRP-UPS is a clever Portable Power System enabling you to power your outdoor or off-grid adventures with pure solar power! QRP-UPS portable power system delivers up to 15.5V/8A. The built-in lithium-ion battery can be charged using a solar panel through it’s MPPT regulated solar panel input.

      • RadioSport Headsets

        Leading contest stations like K9CT and expeditions like TX5S prefer RadioSport Headsets because they are Super-comfortable, quiet and sounds great on the air.  Radiosport RS60CF Headsets offer top-notch audio and comfort, ideal for DX hunting and contests. 24dB noise reduction, Electret Condenser Mic, and Drivers designed for the voice range reduce listener fatigue. Its Dual Layer Gel Ear Cushions are great for glasses wearers and ensure long-lasting comfort. Interchangeable Headset-To-Radio cables are sold separately and available for most common transceivers. If you don’t find your cable, ask us! Contact us for Club and Contest station package deals!

      • RAK Wireless

        The RAK Wireless WisBlock Starter Kit is based on the Core RAK4631. Prioritising power efficiency and management, the it is the perfect choice for solar powered off-grid Meshtastic nodes, routers and repeaters.

      • Samlex

        Samlex Europe is a family owned business, which has been supplying high quality power supply products at extremely competitive prices since 1991.

    • V-Z
      • VGC

        Vero Global Communication Co., Ltd. (VGC) is a Chinese high-tech company based in Quanzhou, Fujian, specializing in two-way radio development and manufacturing. Founded in the mid-2000s, VGC produces the innovative N Series radios, including the VR‑N76 handheld and VR‑N7600 mobile models. With in-house R&D, ISO 9001/14001 certifications, and international approvals (FCC, CE), VGC delivers reliable, app-integrated communication tools for both amateur and professional users.

      • Vibroplex

        Vibroplex® is the name in Amateur Radio, now in its 117th year. Founded in New York in 1905 by Horace Martin, the inventor of the semi-automatic or “bug” morse code key, Vibroplex® presently manufactures morse code keys under the Vibroplex® and Bencher® brands. VIBROPLEX – The standard for iambic keyer paddles. Vibroplex created the first key on the market for use with electronic keyers in 1960 with the single lever VIBROKEYER paddle and followed up with the STANDARD series of iambic keys in the 1970’s. There are now more than 100,000 Vibroplex iambic paddles in use worldwide for Amateur Radio! The Bencher BY-1 and BY-2 are the world’s most popular iambic paddle, with more than 100,000 sold since their introduction in 1974.

      • WaveNode

        WaveNode provides sensibly priced RF wattmeters and monitoring equipment for Amateur Radio, Government Agency, Avionics, AM/FM Broadcast, and Emergency Communications. Coax sensors from 60 KHz to 1.3 GHz are available for every application, and up to four sensors can be monitored on the LCD display. Connection via USB to a PC allows simultaneous viewing of the four sensors. The RF modulation at the sensors is digitised, and can be analysed real-time with digital scope and spectrum analyser software provided. A software package with a powerful suite of tools is provided with WaveNode wattmeter systems. WaveNode systems comes complete with meter, one thruline HF-1 sensor, software, USB cable, and power supply.

      • Xiegu

        Xiegu transceivers are compact, feature-rich SDR radios designed for portable HF operation. Whether you’re activating SOTA, hiking remote trails, or operating DX on the go, models like the G106, G90, X6100, and X6200 offer the perfect blend of performance, portability, and value. Add to the usability with a wide array of accessories, and when operating from home, enjoy the full 100 watts of power with the XPA125B amplifier. Compare Xiegu transceiver models side-by-side here ➜

      • zerofox3D

        The Bender by zerofox3D is the wildly popular case for the Heltec V3 LoRA Meshtastic powered Radio node. Just add your own HeltecV3 and you have a Meshtastic node!

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    • FlexRadio FlexRadio
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    • Adventure Products Adventure Products

      Get ready for the excitement of operating outdoors. Gear up with high quality and reliable equipment for SOTA, POTA, IOTA, EMCOMM or other off-grid adventures.

    • Meshtastic Meshtastic

      Meshtastic® is a project that enables you to use inexpensive LoRa radios as a long range off-grid communication platform in areas without existing or reliable communications infrastructure. This project is 100% community driven and open source! Operating on 868 MHz using LoRa devices, it’s ideal for off-grid comms in remote areas, disaster zones etc. It creates resilient networks, with each device acting as a node and router, transmitting data directly between devices for enhanced privacy and security. Explore all RAK Wireless Sensors and Accessories Meshtastic® is a registered trademark of Meshtastic LLC. Meshtastic software components are released under various licenses, see GitHub for details. No warranty is provided – use at your own risk.

    • Professional Comm… Professional Comm...

      Communications equipment for professional, governmental and military applications. Please contact us for more information about our professional communications product range.

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Home / Shop / Brands / 4O3A

4O3A develops and manufactures high-quality station accessories and advanced TCP/IP-controlled solutions that bring professional performance to your amateur radio shack. The innovative Genius line is engineered to simplify complex station setups, reduce equipment costs, and improve overall operating efficiency.
Designed by world-class contesters and built for maximum reliability, 4O3A products deliver outstanding automation, seamless system integration, and superior RF performance. Whether you’re optimizing a high-power contest station or upgrading your remote-operation capabilities, these solutions help you operate faster, smarter, and more effectively—ultimately boosting your contest scores and on-air results.
First deliveries of 4O3A products are scheduled for Q1, 2026. Contact us with any questions.

Christmas Promotion! FREE NC-1 Headset + MC-1 Mic with any 4O3A purchase of €2,000 or more!

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  • 4O3A Antenna Genius 8x1 4O3A

    4O3A Antenna Genius 8×1

    719 kr     Read more
  • 4O3A Antenna Genius 8x2 4O3A

    4O3A Antenna Genius 8×2

    1 079 kr     Read more
  • 4O3A MC-1 Boom Mic for NC-1 Headset 4O3A

    4O3A MC-1 Boom Mic for NC-1 Headset

    69 kr     Read more
  • 4O3A NC-1 Noise Cancelling Headset w/BT 4O3A

    4O3A NC-1 Noise Cancelling Headset w/BT

    309 kr     Read more
  • Power Genius XL 2kW HF/6m LDMOS Amplifier 4O3A

    Power Genius XL 2kW HF/6m LDMOS Amplifier

    5 975 kr – 6 950 krPrice range: 5 975 kr through 6 950 kr     Select options This product has multiple variants. The options may be chosen on the product page
  • Tuner Genius XL 2kW HF/6m Automatic Antenna Tuner 4O3A

    Tuner Genius XL 2kW HF/6m Automatic Antenna Tuner

    2 769 kr – 3 146 krPrice range: 2 769 kr through 3 146 kr     Select options This product has multiple variants. The options may be chosen on the product page

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