AW: PAVE/PAWS (Over-The-Horizon radar - shades of the woodpecker - in reverse!)

"siegfried jackstien" <siegfried.jackstien@...>

Is it possible to change the design and use a different chip?!?

There are so nice chips that go 300-3 gig ... so then we would "loose" 2m
(but that is not good for wideband data anyway) ... but we would GAIN 23cm
and 13 cm (also useable maybe then for 2.4 gig wlan nets with high power
long range)

... yes I know you have a design ready ... but changing "only" the tuner
should not be that difficult ... and as seen above ... it seems worth it

Here in Europe no 220megs band ... so for "us" here it is nothing more then
a single band radio

And with different tuner you would boost it up to a 3 band radio



-----Urspr√ľngliche Nachricht-----
[] Im Auftrag von Bryan Hoyer
Gesendet: Freitag, 2. Mai 2014 14:39
Betreff: Re: [UniversalDigitalRadio] PAVE/PAWS (Over-The-Horizon radar -
shades of the woodpecker - in reverse!)

We use the CMX991 IQ Transceiver which can operate from 100MHz to 1GHz,
but that doesn't mean the whole radio design works over that range.

The most likely next band will be 220MHz but as John says, we'll have to
see how sales/revenue go.

Bryan K7UDR

On May 1, 2014, at 11:52 PM, siegfried jackstien
<siegfried.jackstien@...> wrote:

Would it be possible to expand the frequency range to 23 cm???

What tuner chip (rx and tx) do you use???

Why restricted to 1000 megs??

(there are now such nice wideband rx tx chips available from 300 megs to 3
gigs ... any plans to "upgrade" the hardware?!?

Or are you already using such a chip (and you had just to change the soft
for a wider tuning range and maybe change a few components)???




-----Urspr√ľngliche Nachricht-----
[mailto:UniversalDigitalRadio@...m] Im Auftrag von John D.
Gesendet: Freitag, 2. Mai 2014 05:45
Betreff: Re: [UniversalDigitalRadio] PAVE/PAWS (Over-The-Horizon radar -
shades of the woodpecker - in reverse!)


Our focus right now is getting the 70cm radio out to market.

The radio portion of the architecture can be repurposed to frequencies
the 100-1000 mhz range (not 23cm and we don't think 2m is a good choice)
but we have to see the response to the 70cm version (e.g. how many do we
sell) before approaching other bands.

The nice thing with this price range of radio is that you should be able
to build networks of relay nodes in the valleys without the need for
mountain top, radar footprint nodes.


John D. Hays
PO Box 1223, Edmonds, WA 98020-1223
<> <!/john_hays>

On Thu, May 1, 2014 at 9:12 PM, <u4gh@...> wrote:

Does anyone have ideas just how those of us living in the US near a
PAVE/PAWS installation (e.g., most of California) are going to be able
operate this radio?

I was really looking forward to getting back into high speed digital
radio, but the US government, who have the primary allocation in the 70
band is making it next to impossible to do much on 70 cm in the most
populous areas of California (including Silicon Valley). 50 W PEP is the
limit, but many of the repeaters with any visibility have been told to
reduce the power output levels by *57 dB* or more!

We're being warned that we need to keep 70 cm signals 'off the
radar', so to speak. We have to be very careful with 70 cm operation to
prevent a total shutdown of the band in this area. Ugh. This is going to
be a problem for much of the southern US: OET --47 CFR 2.106 Footnote

image <>
OET --47 CFR 2.106 Footnote US7
Federal Communications Commission
View on <>
Preview by Yahoo

Any hope of a 23 cm (or other band) RF deck in the forseeable
future? (I know that 23 cm is still 'DC' to Dennis. :-) ).

(Or will there be a model with no power amp on it to experiment with
high speed digital QRP? :-)

- Richard, VE7CVS (/W6)


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