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New product!!!

 

 

 

>> 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: June 25, 2025
---------------------------------------------------------
Expected availability: 
Available from June 2025 on eBay (for Europe customers)
US customers (late July 2025)

KT-005 User & Assembly Manual:
(Last update: June 24, 2025) 

Product brochure:
(Last update: January 07, 2025)

 



First ATUs KT-005 ready for shipment (June 2025)

 ---------------------------------------------------------
The first production batch is reserved as a priority for those who have 
expressed interest via email. Emails with availability information will 
be delivered shortly.

>> The first production run is several dozen pieces. We hope there 
will be enough for everyone interested!
 
 



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

 
07.12.2024: ATU (KT-005) series production begins
---------------------------------------------------------
Prices*: 
- assembled version in the enclosure: $219 or 199 EUR
- kit for self assembly (SMT components populated) + enclosure: $175 or 157 EUR
- kit for self assembly (SMT components populated) without enclosure: $150 or 134 EUR
- enclosure: $25 or 23 EUR

Shipping cost:  (please contact directly for a detailed quote; the cost 
depends on the destination country; use the email provided below)
- European Union: up to 17 EUR
- Outside Europe/Non-EU: up to $45/40 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.
 
---------------------------------------------------------
Questions & Answers:
  Q: Why ATU KT-005 project was created?
  A: There were no ATUs on the market that were sized to fit the portable 
TRX QCX® and QMX® series. The KT-005 is twice as small as previously 
available solutions. Here we have portability without compromise.

  Q: Is the visual resemblance to QCX®/QMX® TRX coincidental?
  A: No. The ATU KT-005 is designed as an extension to QCX®/QMX® TRX 
series. Also in terms of visuals. Aesthetics matter. More products from 
this series on the way (e.g. KT-019 NanoSpeaker; check the datasheet 
in the bottom section).

  Q: Why were SMA connectors used in the circuit instead of BNC connectors? 
  A: The top priority was maximum miniaturization. Even the smallest right-angle
BNC connector would have noticeably increased the size of the device. In the
current design, there is literally no room left inside. It’s recommended to use
a convenient BNC-to-SMA adapter to connect the ATU directly to the transceiver.

  Q: Why ATU KT-005 development take so long?
  A: Well... The ATU project is much more complicated than it seemed at first. 
Our quality goal is to fix all known bugs and offer a factory quality product, 
not a product in the prototype phase. I hope this will be understood and 
appreciated.
 
--------------------------------------
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

KT-019 Preliminary User Manual available!!! 
 
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

KT-001 picture
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  

KT-002 picture

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




------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------
NCDXF/IARU Beacon Monitor
Mfr. No: KT-003K (kit) or KT-003A (assembled)
Useful tool for monitoring NCDXF/IARU beacons

KT-003 picture
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

kt004

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:    
    or     ebay.com

> 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.

 



NEED SUPPORT...?
>> For technical, quotation or after-sales questions, please contact us:

 
 
 

Products under development:

NCDXF monitor + clock (GPS synchronized) (KT-013)
MK II version of acclaimed KT-003 kit 
(available Q3/2025)
 
Antenna Impedance Monitor (KT-014)
Novel real-time antenna impedance monitor
(available Q4/2025)
 
Portable Active Speaker (KT-019)
Compact powered speaker for POTA/SOTA operation
(available Q3/2025)
 
 
Ultra-portable CW Paddle (KT-025)
CW paddle for POTA/SOTA operation
(available Q4/2025)



FAQ'S

Q: Is the printed manual attached with the kit?
A: Yes, every kit is shipped with a printed instruction/assembly manual.

Q: How are the sets secured during transport?
A: Each set is packed in a separate cardboard box. We do not ship kits/devices in bubble envelopes.

Q: Did you offer assembled boards?
A: For kits which are the most popular we offer an assembled version.

Q: What is the estimated international shipping costs?
A: For EU customers it is about 17 EUR. For non-EU and other locationsit is in the $30 to $40 range. 
Please contact us in advance to arrange the details. We use DHL and FedEx services.


DOCS & DOWNLOADS
KT-001 SWRduino

Example file for the Arduino Uno and SWRduino board available in the Application Example document -->
PDF FileKT-001 datasheet [ENG version] 


PDF FileKT-001 SWRduino - Przyklad aplikacyjny [POL version]
KT-002 RF Dummy Load PDF FileKT-002 datasheet [POL version]
PDF FileKT-002 datasheet [ENG version]
KT-003 CW Beacon Monitor
PDF FileKT-003 datasheet [ENG version]
KT-004 CWduino

Example files for the Arduino Uno board available for free download:
- CW beacon
- CW keyer

>> Start your own project with ease!
PDF FileKT-004 datasheet [ENG version]
PDF FileKT-004 datasheet [POL version]  

arduino_icon
KT-004 example files for Arduino
KT-019 Nano Speaker (NEW!)
(Preliminary version)
PDF FileKT-019 datasheet [ENG version]
(Preliminary)

 KT-005 Automatic Antenna Tuner (ATU) - User Manual for assembled version 

 PDF FileKT-005 datasheet [ENG version]

 

All documentation files are provided in PDF format.
Please use Adobe Reader or PDF-Xchange Viewer to open them.


 


All of our products are proudly designed
and manufactured in Poland.


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