For Choc boards, crystals, IFT's and other small parts, please contact us directly.
Download the new 56-page Choc board building book and Free Choc board gerber file by BD6CR.
Last update: 2023-04-03
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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. Accepting orders now and shipping in a week.
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. Kit Assembly Manual, 41-pages with many photos Track BD6CR QRPP WSPR signal at 20m Subscribe to https://groups.io/g/crkits to join the discussion and view:
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CRK-10A CW Transceiver Kit Unit Price: 49 USD including tracked air shipping.
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The classic crystal controlled CW transceiver with great performance is back! Subscribe to https://groups.io/g/crkits to join the discussion and view: CRK-10A eHam product review average rating 5.0/5.0
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CS-xxV SSB Transceiver Kit Unit Price: 85 USD (mic is not included) including tracked air shipping. You can choose from CS-40V and CS-15V. You can use your ICOM HM-36 hand microphone for this kit. [Starting from 2023, you will get MC1350 again in the kit as free upgrade.]
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We introduced the KN-Q7A SSB transceiver kit in October
2011, and it was a big success. Now, we bring it
back with a few modifications. We also newly added 15-meter called CS-15V.
Here, V in CS-xxV is for VXO. There is no DDS, MCU, or anything else digital.
All analog, all traditional. The IF crystal filter is improved with a better impedance matching. The MC1350 replacement is a tiny module of a dual gate FET. The gain is lower, the gain control is counterclockwise [of course, you can modify it back], but it is loud enough for the speaker microphone if you are using a full sized antenna. Subscribe to https://groups.io/g/crkits to join the discussion and view: [The previous generation KN-Q7A was widely introduced by CQ Amateur Radio magazine in US, CQ Ham Radio magazine in Japan, RadCom magazine in UK, Amateur Radio magazine in Australia, and some other brief introductions in other countries since 2012. KN-Q7A eHam product review average rating 4.8/5.0 KN-Q7A manual for PCB V2.2, including schematics and partlist for 80/75/40/20m ]
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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.
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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 Schematic: Inspired by VK3YE Knobless Wonder and K1SWL Warbler with improvements New Review by Peter Parker, VK3YE https://www.youtube.com/watch?v=pAJE7IKOuPw Subscribe to https://groups.io/g/crkits to join the discussion and view:
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R3500D
ARDF Receiver
Kit Unit Price: 39 USD including tracked air shipping. Earbuds are not included.
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R3500D is the upgraded version of the well known PJ-80
80m direction finding direct conversion receiver kit. 3500~3600 kHz
coverage. Color is random. Subscribe to https://groups.io/g/crkits to join the discussion and view: Note that the LO frequency is at half of the working frequency. It is by design, no worries. PJ-80 eHam product review average rating 5.0/5.0
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KN-Q7A manual, quick guide, part list, and drilling template
CS-series Detailed Manual with Photos, Download product photos ,Arduino Sketch for CS-17/15, CS-20 (updated), CS-40
D4D Documentations
Sandwich digital VFO Detailed manual with photos, Arduino Sketch for KN-Q7A 80m, 40m, and 20m band, and Detailed manual in Spanish by Jon, EA2SN
CRK-10 manual including part list, quick guide in English
Choc perfboard Build a SSB transceiver with Choc Perf Board
HT-1A User manual, kit building instructions and schematics in zipped format
PJ-80 manual, supplement manual by CRKITS and part list (with manual errata) in English
Gipsy Portable Dipole Antenna manual in English
Join our group at
https://groups.io/g/crkits to be able to access manuals and other documents and photos
Order: Order online through PayPal, or contact your local distributor (Japan, USA, UK). Please confirm ship to address, name and telephone number during payment. Please allow about one week for kits preparation.
Payment: You can pay USD by credit card or debit card through PayPal and don't have to setup a PayPal account. Your credit card information is protected by PayPal. Your receipt will be sent to you via email by PayPal.
Refund policy: Please understand our business is still a side business. If you are not satisfied with the products, contact us and refund will be issued after you return the products with a tracking number.
Shipping: We have shipped our products through post office registered AIR parcel service from China to many countries. We will declare as commercial sample of ham radio kits and accessories and the actual value. The normal lead time per our past experience is 7~30 days (varies by countries, mostly 10~21 days). During this COVID-19 period, the lead time may take longer.
Tracking: After shipment, you will be automatically notified of the tracking number through PayPal. By default, no direct email will be sent from us. You can track online with the tracking number.
Customs Clearance and Import Duty: The buyer bears the responsibility to clear customs and pay import duty (tax) if it applies, however, we are glad to provide invoice by email per request to facilitate the buyer.
Customer satisfaction is our goal. Should you have any questions or comments, please send email to us first.
You can also subscribe to https://groups.io/g/crkits to send your questions or share your ideas.
If you need our repair service,
contact us by email for return address. If you purchased from your local
distributor, please contact local distributor directly.
Contact: Adam Rong, BD6CR Web site on qsl.net Email: rongxh@gmail.com
Japan distributor: Junichi Nakajima, JL1KRA http://jl1kra.sakura.ne.jp/
USA distributor: Larry Lovell, N7RGW http://www.qrvtronics.com
EU distributor: SDR-Kits http://www.sdr-kits.net
All rights reserved.