Pluto – SDR – Mods

PlutoSDR modifications for anyone…


Modification boards for PlutoSDR

We offer you a one time limited edition of our newly designed TCXO modification board for PlutoSDR while stocks last.

Sorry, we are sold out !

The full batch has been sold. Depending on siginificant amount of continued interest in these boards I may decide to have a second production factory run anytime soon.

If you would like to get on the waiting list and be informed about updates by email, please use the contact form on this page. 73.

The newly designed V2.0 board offeres the following features:

  • High stability, low drift TCXO modification board.
  • Based on a 40 MHz, 3.3v, 0.1ppm, low phase noise, CMOS output VCTCXO type
  • Reference calibration correction done in software or hardware
    (e.g. in Pluto flash memory or via client like e.g. SDR-Console)
  • Optinal retrofit pads for a Bourns high precision multi turn potentiometer for adjusting the frequency correction in hardware to set the clock to EXACTLY 40 MHz
  • Mounted away from the heat generating TRX chip for enhanced stability
  • PCB size 9 x 25mm. The height fits into the available space inside of the original PlutoSDR enclosure
  • Professionally produced with all SMD components pre-soldered in a commercial SMD fabricating house

This breakout board has been specifically developed for those hams that are not comfortable with soldering tiny 1.6 x 2mm TCXO units into their Pluto SDRs and would prefer to have a larger more easy to solder alternative available.

PlutoSDR VCTCXO board V2.0

“Stick it into your Pluto, hookup three wires and you’re ready to go…”

Pluto modification has never been this easy…

One time Limited Edition factory batch run. Available whilst stocks last !

Important recommendation:
You should have had at least some previous SMD soldering experience. Ideally this is not your very first SMD project. Otherwise we recommend you to seek help from a fellow ham in your neighbourhood to help you solder this modification board into your PlutoSDR.

Press the “Buy Now” button below to order one or more boards.
This will allow you to pay by PayPal.

One board costs 39.95€ + 5.00€ global shipping “flatrate”. No matter where you live.

You do not need to have a PayPal account, you can also pay as a guest at PayPal:

COVID19 shipping restrictions:  Right now shipping to USA, Caribbean, Australia, New Zealand and some parts of Africa, Asia and South America are restricted due to limited transport capacity and suspended postal services for goods sent in large size airmail envelopes. Shipping to Europe has no restrictions and should work 100%. Please send me an enquiry if you order from outside of Europe to check postal status of your country.

Buy Now Button

The PayPal button will lead you to a PayPal shopping cart where you can select the amount of boards you want to order. The global shipping cost flatrate will be automatically calculated by the system. Boards will be shipped by international registered airmail.

Before being able to install this modification board into your PlutoSDR you need to either disable the internal oscillator or to completely remove it. The most easy process is to disable the original Rakon oscilator by grounding the E/D pin (Enable/Disable function).  But removing it gives slightly easier access to the clock pin and needs no additional decoupling C. Both methods work fine.

We also recommend strongly to add some heat dissipators to the FPGA and TRX chips for additional improvement of stability. The most easy way of doing so is to order a self adhesive heat sink set for Raspberry Pi3. They fit very nicely onto the chips of the ADALM Pluto SDR and are cheap and very quickly mounted.

Download the mounting instructions:
Download PlutoSDR Modification Board Instructions V2.0 (PDF) here…

YouTube video demonstration on easy removal of the original PlutoSDR oscillator: