Products

Description

CRK-10A CW Transceiver Kit

Unit Price: 45 USD. Slow Air Shipping and Handling: 9 USD.

Frequency

 

The classic crystal controlled CW transceiver with great performance is back!

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CRK-10A eHam product review average rating 5.0/5.0

 

CS-xxV SSB Transceiver Kit

Unit Price: 65 USD (mic is not included). Slow Air Shipping and Handling: 10 USD. You can choose from CS-40V and CS-15V. You can use your ICOM HM-36 hand microphone for this kit.

Coverage

 

 

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.

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[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 ]

 

13 Transistor Transceiver for Digital - 7074 USB - NEW!

Unit Price: 59 USD including slow 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

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

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D4D DSB Transceiver Kit for Digital Mode

Unit Price: 35 USD. Slow Air Shipping and Handling: 8 USD. All the parts and case are included.

Frequency

 

D4D stands for DSB transceiver for Digital mode. It is a very simple and low cost crystal controlled 1-watt transceiver designed specially for FT8, FT4, or JS8CALL and etc. VOX is included, so you just need audio cables to work with your computer or Raspberry Pi.

Please understand: Due to the nature of DSB mode, the assembled kit cannot meet bandwidth requirement of 3kHz, so it is designed to be QRPp,  and it is not recommended to use it often, especially when you have ham neighbors.

Dimensions: 103mm(L) x 66mm(W) x 27mm(H), not including protruding parts
Weight: about 165 grams

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D4D eHam product review average rating 5.0/5.0

 

R3500D ARDF Receiver Kit

Unit Price: 30 USD. Slow Air Shipping and Handling: 9 USD. Earbuds are not included.

 

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.

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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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