25 Mar
2019
25 Mar
'19
2:42 p.m.
Hello John,
Sure, you can use RF4463F30 modules for the 33cm band (band not
available for amateur-radio here in France). But then the difficulty
would be to find a good (and cheap) radio amplifier with fast TX/RX
commutation times. The big avantage of my solution over 430MHz band is
that you can find cheap DMR amplifier, with fast TX/RX times (less than
500 microseconds).
If you find equivalent amplifiers for 33cm band, please let us know. I
would be very interested, and I will update my project!
73,
Guillaume F4HDK
Le 24/03/2019 à 19:36, K7VE - John a écrit :
I note that at the advertised bit rates, the OBW
(occupied bandwidth) may
exceed US Regulations for 70cm. However, the chip used, is also claimed to
support 33cm.
I am interested in the new packet protocol proposed by the project. Even at
a lower bps on 70cm (for the US), and full rate at 33cm, this has real
potential for mid-tier data communications.
CFR 47 Part 97.307 (f) 6
On Sun, Mar 24, 2019 at 4:05 AM f4hdk
<f4hdk(a)free.fr> wrote:
> Hello,
>
> I am Guillaume, callsign F4HDK, a french amateur-radio operator, and a
> hacker-maker.
> I would like to share with you my last project : NPR (New Packet Radio).
>
> All documentation is provided here :
> https://hackaday.io/project/164092-npr-new-packet-radio
>
> This solution can transport bi directional IP trafic over 70cm radio
> links, in a 'point to multipoint' topology, at datarate up to 500kbps.
> This can be used to increase the range of existing HSMM-Hamnet networks,
> at lower datarates.
> It's designed for "access", not backbone, and not designed for H24
use.
> Its is 100% open-source.
>
> Do not hesitate to ask me questions about it.
> I hope it will interest some people here.
>
> 73,
> Guillaume F4HDK
------------------------------
John D. Hays
K7VE
<http://k7ve.org/blog> <http://twitter.com/#!/john_hays>
<http://www.facebook.com/john.d.hays>