KRAIT Technologies

>> Official Release <<

QRP Automatic Antenna Tuner
Mfr. No: KT-005
Ultra portable QRP ATU

Size comparison (from left to right): KT-005*, T1, mAT-10

*) KT-005 is not equipped with an internal battery/rechargeable battery

Update: August 25, 2025

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Expected availability:

Available from June 2025 on eBay (for EU customers) and Allegro Lokalnie (for customers in Poland)

Available for US & UK customers by the end of July 2025

KT-005 User & Assembly Manual:

KT-005 User & Assembly Manual [ENG version]

(Last update: July 09, 2025)

Product brochure:

KT-005 RELEASE information [ENG version]

(Last update: January 07, 2025)

KT-005 review on SOTA Reflector: KT-005 Review

July 2025: The first confirmed SOTA expedition to use the KT-005 was by EA4R (Alfonso). When it comes to hiking,
size matters. The KT-005 ATU was sedigned to meet the need for quick antenna tuning in all field conditions.

Special thanks to Alfonso, EA4R, for sharing the photos.

24.08.2025: Another great example of building a super-portable radio station using the ATU (KT-005)

with the QMX transceiver. Such a compact setup is a perfect solution for SOTA operations.
Thanks to David, CT7AUP, for sharing the photo.

June 2025: First ATUs KT-005 ready for shipment

07.01.2025: ATU (KT-005) First production units undergoing final testing

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Prices*:

- fully assembled, enclosed and ready to use: $219 / €199

- kit for self assembly (SMT components populated) + enclosure: $175 / €157

- kit for self assembly (SMT components populated) without enclosure: $150 / €134

- enclosure: $25 / 23 EUR

*) The listed prices apply to direct sales. When purchasing through Allegro

or eBay, the prices are adjusted to include the respective platform's commission fees.

Shipping cost: (please contact directly for a detailed quote; the cost

depends on the destination country; use the email provided below)

- Poland: 5 EUR

- European Union: up to 17 EUR

- Outside Europe/Non-EU: up to $45 / €40

UK: Radio communication equipment (HS code: 85437090) is not subject to customs duties — only a 20% tax is applied. The delivery may take up to 3-4 weeks!

USA: HTS 8517.70.00.00 ("parts of telecommunication apparatus") — no customs, only some fees 43-48 USD

Switzerland: TBD

Australia: TBD

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Questions & Answers:

Q: Why was the ATU KT-005 project created?

A: There were no antenna tuners on the market appropriately sized
to match the portable QCX® and QMX® transceivers. The KT-005 is half
the size of previously available solutions - offering true portability
without compromise.

Q: Is the visual resemblance to the QCX®/QMX® transceivers coincidental?

A: No, the ATU KT-005 was designed as a visual and functional extension to
QCX®/QMX® transceiver series. Aesthetics matter. More products from

this series are on the way (e.g. KT-019 NanoSpeaker - see the datasheet

in the section below).

Q: Why were SMA connectors used instead of BNC connectors?

A: The top priority was maximum miniaturization. Even the smallest right-angle
BNC connector would have noticeably increased the device's size. In the
current design, there is literally no space left inside. Check the project
documentation to see for yourself. To connect the ATU directly
to the transceiver, a compact BNC-to-SMA adapter is recommended.

Q: Why did the development of the ATU KT-005 take so long?

A: Well... the ATU project turned out to be much more complex than
it initially seemed. Our goal is to resolve all known issues and deliver
a product with factory-level quality - not something that still feels like

a prototype. We hope this approach is understood and appreciated.

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YouTube promotional video (published September 08, 2024):

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NanoSpeaker
Mfr. No: KT-019
Ultraportable high-efficient
active speaker for POTA/SOTA activations

Update: August 24, 2025 NEW

KT-019 Preliminary User Manual available!!!

KT-019 Nano Speaker - User Manual [ENG version]

Expected availability:

series (black enclosure like KT-005) - end of Q3 2025

>> If you are seriously interested, please let us know! The start of mass production depends on customer demand.

Price:

- assembled version in the enclosure: $45 or 43 EUR

- kit for self assembly (SMT components populated) + enclosure: $39 or 37 EUR

- enclosure: $25 or 23 EUR

NanoSpeaker (KT-019) in action (YouTube promotional video):

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SWRduino Mfr. No: KT-001K (kit) New tool for RF experiments with Arduino Uno board	RF Dummy Load Mfr. No: KT-002K (kit) or KT-002A (assembled) Cost effective HF + 6 m band 50R RF dummy load
Features Higly integrated QRP HF band SWR bridge up to 20 W Full compatibility with Arduino™ Uno board Tandem Match configuration for best directivity Only THT components for easy assembly Easy access to measured values (P fwd and P ref ) from ANALOG_IN input section Germanium diodes for best sensitivity Optional trimmers for precise adjusting SMA connectors for size critical applications (optional also BNC connectors) Equipped with ISP connector (2x3 pin header) Only passive components; no current consumption Mechanical Characteristics Full mechanical and electrical compatibility with Arduino™ Uno Board and LCD 2x16 shields Double-layer PCB Double-sided connectors for Arduino Compact design: 68 x 54 x 12 mm	Features Cost-effective HF + 6 m band 50R RF dummy load 100 W continuous power handling 300 W peak power handling capability Low VSWR levels up to 54 MHz UC-1 (PL-259) RF input connector Built-in fan for reliable continuous operation 2,1x5,5 DC input connector for the fan supply THT components for easy assembly Mechanical Characteristics Compact design: 80 × 80 x 75 mm (with fan) One layer PCB for easy components assembly Solid aluminum baseplate for the input connector
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NCDXF/IARU Beacon Monitor Mfr. No: KT-003K (kit) or KT-003A (assembled) Useful tool for monitoring NCDXF/IARU beacons Available from June 2023! Features • Usefull tool for quick HF propagation condition check • Time synchronized with built-in GPS receiver • SYNC LED for monitoring synchronization state • CTRL button for band change • External DC_IN connector • Optional battery operation: 3x AAA (holes for a battery holder) • Current consumption: 60 mA @ 9.0 V • Input voltage range: 5.5-18.0 VDC • THT components only for easy assembly Mechanical Characteristics • Metalised front panel with set of LEDs and CTRL switch • Dimensions: 140 x 90 x 25 mm • Two layers PCB • Wooden enclosure available (sold separately) Application • Useful tool for easy HF propagation monitoring • Part of the radio shack KT-003 review on eHam.net: KT-003 Review ------------------------------------------------------------------------------------ NCDXF/IARU Beacon Monitor Mfr. No: KT-003E Wooden enclosure for KT-003 kit Features • Laser cut plywood housing (3 mm thickness) with mounting holes and metal spacers • Supplied in parts. Requires gluing.	CWduino QRP HF CW Transmitter Mfr. No: KT-004K (kit) Superportable CW transmitter for Arduino Uno board with keyer input Features • Highly integrated CW transmitter compatible with Arduino Uno board • HF band coverage: 80, 40 and 20 m (depends on version) • Class-E topology for high efficiency • Built-in 2nd harmonic notch filter to meet CFR requirements (-43 dBc) • 500 mW RF output power from 5 VDC Arduino’s power supply rail • 2000 mW RF output power at 9 VDC • Transmitter keying available from pin PD4 (IOL group) • Precise frequency adjustment via trimmer • Keyer input connector (mini-jack) • Equipped with SMA connector for size critical applications • Equipped with ISP connector (2x3 pin header) • Most components are THT for easy assembly • Example projects for Arduino: CW Beacon and CW keyer available free for download Mechanical Characteristics • Fully mechanical and electrical compliance with Arduino™ Uno board • Double-layer PCB • Compact design: 68 × 54 x 12 mm Application • Board for experiments with class E amplifier • Experimental CW transmitter controlled from Arduino • Automatic keyer with integrated TX stage • Part of Arduino's controlled beacon (in CW mode) • Battery supplied experimental TX module • Part of a portable CW transceiver

Buy these products NOW on:

> Available offers are visible to users in Europe (EU) only.

>> If you are interested in shipping to other parts of the world, please

contact us by e-mail to determine transport costs. In most cases it will

cost around $35-45.

	Products under development: NCDXF monitor + clock (GPS synchronized) (KT-013) MK II version of acclaimed KT-003 kit (available Q4/2025) Antenna Impedance Monitor (KT-014) Novel real-time antenna impedance monitor (available 2026) Portable Active Speaker (KT-019) Compact powered speaker for POTA/SOTA operation (available 2026) Ultra-portable CW Paddle (KT-025) CW paddle for POTA/SOTA operation (available Q4/2026)