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Description

ADX-S Digital Modes (WSPR, JS8, FT4 and FT8) HF QRP Transceiver Kit with 40, 20, 15 and 10 meter LPF Band Modules

Unit Price: 69 USD including tracked air shipping.

Order along with 30, 17 and 12m upgrade and RX modification kit at 85 USD including tracked air shipping.

Photo: BG7IKK who built the ADX-S kit and achieved over 18,000 km DX with his EFHW antenna. Click the photo to enlarge.

The ADX-S Digital Modes HF QRP Transceiver is the Superhet modification of Barb, WB2CBA's open source Arduino Digital Xcvr inspired by the receiver design idea of JA9TTT. The receiver performance is much improved compared with the original direct conversion design at the cost of adding only two components. Several hardware and firmware bugs are fixed so you can build with better experience, thanks to the feedback from dozens of the beta testers and early domestic customers. The code is open source so you can customize the radio with your own idea. It works with WSJT-x, JTDX on PC or FT8CN on Android phones in VOX mode.

Engineering Change Notice 20231213

New! The latest firmware V1.3 supports 7 bands now.

Kit Assembly Manual V1.6, 46-pages, with 7 band upgrade and FAQ

Review by Peter Parker, VK3YE

QRPer.com: FROM IDEA TO KIT: ADAM INTRODUCES THE ARDUINO DIGITAL MODES HF QRP TRANSCEIVER (ADX-S) KIT

hamlife.jp introduced ADX-S

New! CQ-DL magazine in Germany just introduced ADX-S on the latest Feb 2024 issue.

New! QEX Japan magazine just introduced ADX-S on the latest March 2024 issue.

ADX-S eHam product review

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Classic PCB Kit (CPK) Series

Tracked air shipping is included in the price. Please note, DC40 kit does not include NE602, which I hope you can supply by yourself.

If you wish to get the CPK3 SMD part pre-assembled, please refer to this post.

CPK1 = Pixie2023, CPK2 = DC40, CPK3 = KT Receiver

Order

CPK-1 Pixie2023: CW Transceiver with clean output

CPK-2 DC40: Clear receiver with less broadcast interference

CPK-3 KT: Modern FM/MW/SW receiver for minimalists

 

You can share the kit building fun with club members and youngsters with these classic PCB kits.

Pixie2023 Review by Peter Parker, VK3YE

DC40 Short Test Video by JL1KRA

CPK-3 KT Receiver Review by Peter Parker, VK3YE

CPK-3 KT Receiver in Case and More Listening by VK3YE

WB2CBA Barb's Review of CPK-3 KT Receiver

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13 Transistor Transceiver for Digital - 7074 USB

Unit Price: 59 USD including tracked air shipping. All the parts and case are included.

 

Can you build a 1-watt FT8 SSB transceiver by only 13x 2N4401 transistors? This thread contains all the information about this traditional kit of all through-hole parts.

https://groups.io/g/crkits/topic/85889614#3649

Dimensions: 103mm depth x 88mm wide x 38mm height
Weight: about 235 grams w/o internal batteries
Frequency and Mode: 7074kHz USB
Filter: 4x 7078kHz crystals covering around 7075.5-7077kHz
Audio Pass Band: around 1500~3000Hz
PTT Control: VOX
Receive Current: around 50mA
Transmit Current: around 300~350mA
Transmit RF Power: around 1-Watt
Spurious suppression: -53dBc

Kit Assembly Manual Rev. B, FT8CN Operation Added

Schematic: Inspired by VK3YE Knobless Wonder and K1SWL Warbler with improvements

New Review by Peter Parker, VK3YE https://www.youtube.com/watch?v=pAJE7IKOuPw

eHam product review average rating 5.0/5.0

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R3500D ARDF Receiver Kit

Unit Price: 39 USD including tracked air shipping. Earbuds are removed from the kit as they are magnets.

 

R3500D is the upgraded version of the well known PJ-80 80m direction finding direct conversion receiver kit. 3500~3600 kHz coverage. Case color is random in black, orange, green and blue.

A well written kit assembly manual by Jack Purdum, W8TEE Al Peter, AC8GY for Youth On The Air YOTA Region 2 Camp June 21-26, 2020

Video review by Peter Parker, VK3YE

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Note that the LO frequency is at half of the working frequency. It is by design, no worries.

Step by step building video

PJ-80 eHam product review average rating 5.0/5.0

 

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