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Si5351A VFO Kit for DSB Transceivers

This document summarizes a VFO kit for digital transceivers that utilizes a Si5351A/MS5351M PLL chip and Atmega328P microcontroller to generate frequencies from 160m to 10m with 10Hz resolution. The kit includes all necessary components and mounts directly on the transceiver board. It defaults to FT8 frequencies for most bands and calling frequencies for others but can be customized with the open source Arduino firmware. Assembly takes a couple hours for experienced builders.

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Muhammad Zuri
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279 views2 pages

Si5351A VFO Kit for DSB Transceivers

This document summarizes a VFO kit for digital transceivers that utilizes a Si5351A/MS5351M PLL chip and Atmega328P microcontroller to generate frequencies from 160m to 10m with 10Hz resolution. The kit includes all necessary components and mounts directly on the transceiver board. It defaults to FT8 frequencies for most bands and calling frequencies for others but can be customized with the open source Arduino firmware. Assembly takes a couple hours for experienced builders.

Uploaded by

Muhammad Zuri
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Si5351A/MS5351M 160m-10m VFO Kit

This VFO kit is for the original DSB Digital Transceiver or DSB v. II
Digital Transceiver only, but with a user loaded flash to the
Atmega328P, can be used as a gereric 500KHz-55MHz VFO. See
download below.

Si5351A/MS5351M 160m-10m VFO Kit – $40

 
 

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We asked Steve Weber (KD1JV) to design a PLL synthesized VFO kit


(160m-10m) for our transceiver kits. His design utilizes the
Si5351A/MS53512M  PLL clock generator chip, with a single chip
Atmega328P µP for control, featuring a five digit LED frequency readout
to 10Hz resolution. You simply set the band and frequency with the
onboard push buttons. No need to source crystals for additional
frequencies or modes. This kit contains all the components and
hardware for the VFO to mount onto either digital transceiver pcb, other
compatible kits, or if desired, using the four corner holes, mount remotely
in your custom chassis. The MSOP10 Si5351A/MS5351M is pre-
installed, all other components are through hole. There are additional
connections for using a readily available rotary encoder if desired.
The pcb is 3.95″ (74.8mm) x 1.60″ (40.7mm), and mounts directly on
either transceiver board, or remotely, using the included hardware.
Power required 9-14V @40mA.
As a starting point, the VFO defaults to the FT8 frequency for 160m-
17m, and QRP calling frequency for 15m-10m. Specific frequencies for
other modes can be easily entered. To use, simply power up and set the
digital readout to the specific frequency for your use. The firmware is
written with the Arduino IDE and is open source, allowing for the user to
modify the sketch to add functions. On a scale of 1 to 5, 5 being the
most difficult, this is rated as a 3. The normal tools required are a
soldering iron with a small tip, rosin core solder, small side cutters, a
small Phillips screwdriver. Allow a couple of hours to build, depending on
your experience.
 
 

Click here for the VFO assembly manual


 

Click here for the Digital Transceiver Arduino sketch for


customizing
 

The download below is for using the VFO in a generic setting, not for the
Digital Transceiver. We supply the Arduino sketch only and it will be the
responsibility of the user to program their own Atmega328P. See the
enclosed .pdf for details.
Click here for the generic 500KHz-55MHz VFO
Arduino sketch
 
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