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NPR New Packet Radio

John G4SWX
 

Further to my piece on 146MHz in the latest Radcom news on NPR I have received an update from the originator Guillaume F4HDK on the available of firmware to support 146MHz operations. (with an appropriate change of RF module)
I would like to get feedback from anybody who is experimenting with NPR particularly on how to get over spectral re-growth issues when using RF amplifiers and ways in which the broad-band RF noise generated by the chip set can be reduced.
73
John G4SWX
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Hello to the british NPR enthousiats!

I have made a big update of the firmware. Check it here:
https://hackaday.io/project/164092-npr-new-packet-radio

I now publish a firmware for 2m band (144-148MHz). I know that some of you have already bought 150MHz versions of RF4463F30.
I don't have such modules, and I don't plan to buy any. Therefore it would be very helpful if you could test the firmware and give me your opinion.

I let you check all other updates directly on my website here :
https://hackaday.io/project/164092-npr-new-packet-radio/log/163297-6-last-news-updates

73,
Guillaume F4HDK

John G4SWX
 

Besides the support for 146MHz (150MHz RF modules) Guillaume F4HDK has also updated the protocol and its specification:

https://cdn.hackaday.io/files/1640927020512128/NPR_specification_v2.0.pdf

73
John G4SWX