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CS-series SSB Transceiver Kit with Speaker Microphone Combo

 

The CS-series supercedes the KN-Q7A. It integrates Sandwich digital VFO. A few more enhancements are also added. Speaker microphone is added to the standard configuration.

Detailed Manual with Photos

Arduino Sketch for CS-20, CS-40

Download high resolution product photos

Unit Price: 140 USD. Shipping and Handling: 15 USD.
Choose One Band
Sandwich Digital VFO Complete Kit

 

This simple yet useful si5351a and Arduino based digital VFO is a great addition to KN-Q7A and other single conversion SSB radio. The innovative one LED frequency display is amazingly easy to count and read the operating frequency. SMD part is pre-mounted. The assembled kit is as shown on the left.

Detailed manual with photos, Arduino Sketch for KN-Q7A 80m, 40m, and 20m band

Detailed manual in Spanish by Jon, EA2SN

Unit Price: 19.9 USD. Shipping and Handling: 5 USD.
IF Frequency Options

 

Sandwich Digital VFO Partial Kit without Arduino Board

 

 

If you already have an Arduino Pro Mini ATmega328 3.3V board and serial programmer on hand, you can order this one. Unit Price: 9.9 USD. Shipping and Handling: 5 USD.
Sandwich Digital VFO Assembled Kit

 

 

It is assembled and aligned. You just need to put together with your radio. Unit Price: 29.9 USD. Shipping and Handling: 5 USD.
IF Frequency Options
Sandwich Digital VFO FTDI Serial Programmer

 

 

This genuine FT232 based serial programmer can be used to upgrade the firmware yourself if you want to make some modifications. You will need to download Arduino IDE, setup board as "Arduino Pro or Pro Mini" and processor as "ATmega328 3.3V/8MHz", choose correct serial port (if necessary, install driver first for this serial programmer), make changes to the sketch and click Upload button.

Wiring to Sandwich digital VFO

Download Arduino Sketch for KN-Q7A 80m, 40m, and 20m band

Unit Price: 9.9 USD. Shipping and Handling: Free.

KN-Q7A SSB Transceiver Kit

 

A popular 80/75m or 40m or 20m single band SSB transceiver kit designed by BA6BF. 10 watts PEP output (5 watts PEP for 20m). Sensitive and selective receiver due to 6-pole IF crystal filters. Multiple frequency options and can be adjusted to wider coverage. Rigid metal case included. Ideal for SOTA and backpackers. The assembled kit is as shown on the left.

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.

eHam product review average rating 4.9/5.0

manual for PCB V2.2, including schematics and partlist for 80/75/40/20m

Upgrade version is CS-series. Now ready to ship.

R3500D ARDF Receiver Kit

 

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.

R3500D English manual including part list, modification instruction to 40-meter band and photo of the PCB assembly

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

Unit Price: 30 USD. Shipping and Handling: 6 USD.
R3500D ARDF Receiver (Assembled)

 

R3500D is the upgraded version of PJ-80 assembled receiver. 3500~3600 kHz coverage. Color is random.

 

Unit Price: 39 USD. Shipping and Handling: 6 USD.
CRK-10A CW Transceiver Kit

 

A credit card size 40m or 30m CW transceiver kit designed by BD4RG. 3 watts output for 40m band or 2 watts output for 30m band. Same built-in keyer as HB-1A or HB-1B. Multiple frequency options. The assembled kit is shown on the left.

eHam product review average rating 5.0/5.0

manual including part list

 

Unit Price: 55 USD. Shipping and Handling: 5 USD.
Frequency Options

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