[Hackrf-dev] HackRF DX 100Km on 1296.1

[Rich Sanders]

I'm a ham and just recently moved so my equipment isn't setup again (and I
probably wont be able to use my old antenna.)  In conjunction, my Linux box
crashed and I haven't had the time to reload everything.  To avoid the
issues about the transmit and receive, I use two different HackRFs.  My
transmit was hooked to a low power home brew amplifier, but could easily be
connected to a nice large amp.  Although I had to buy two HackRFs, I am
easily able to perform full duplex operations using two half duplex
HackRFs.  I also don't have to worry about changing modes in the HackRF.
My software was setup initially using GNURadio, then I modified the python
file to suit my needs.

Also, there is a ham mode called QRP, which is based along the idea of how
far can you communicate with low power.  There is no complete agreement on
what constitutes QRP power levels, the two most common accepted power
levels for QRP are less than 5 watts and less than 10 watts.  The HackRF
excels in this because it is already very low power and building your own
home brew amp is relatively easy.

I would gladly share these files, but like I said, my Linux box crapped the
bed and I haven't had time to reload it.

As far as unlicensed bands, the FCC website (for those of us in the USA) is
a pain to navigate and their band plans seem to be outdated.

Dummy loads are relatively cheap on Ebay and you can find plenty of sites
for home brew dummy loads.  The HackRF is low power, so you could get a
away with a much lighter dummy load.

- Rich

On Thu, Sep 24, 2015 at 7:33 AM, Dominic Spill <dominicgs at gmail.com> wrote:

> On 24 September 2015 at 00:20, Scott Davis <scottk5ta at gmail.com> wrote:
> >
> > It’s odd that people interested in RX-only would spend the extra money
> > instead of getting an RTL or FCD or AirSpy or SDRPlay or….
>
> I think that there are a lot of users transmitting with HackRF, but
> even for RX only there are a number of factors that go in to choosing
> hardware which may have lead to picking HackRF.  The main ones that I
> can think of are frequency range and bandwidth, but there are plenty
> more.
>
> > On Sep 23, 2015, at 4:59 PM, Toth, Gregory S <gregory.s.toth at boeing.com>
> > wrote:
> >
> > I assume that even without a license, it is ok to use a 50 ohm coax
> cable to
> > connect the Hack RF antenna jack directly to the input of an appropriate
> > receiver? Probably could use an inline attenuator just in case.
> >
> > From: HackRF-dev [mailto:hackrf-dev-bounces at greatscottgadgets.com] On
> Behalf
> > Of C Crane
> > Sent: Wednesday, September 23, 2015 1:58 PM
> > To: Chuck McManis
> > Cc: hackrf-dev at greatscottgadgets.com; Dana Shtun
> > Subject: Re: [Hackrf-dev] HackRF DX 100Km on 1296.1
> >
> > Perhaps so. It just surprised me that there wasn't more overall
> interest. I
> > thought there would be more people playing with different modes and what
> > not. I guess I incorrectly assumed most of those with an interest in RF
> > would also probably be licensed.
> >
> > On Wed, Sep 23, 2015 at 3:55 PM, Chuck McManis <chuck.mcmanis at gmail.com>
> > wrote:
> > On Wed, Sep 23, 2015 at 2:39 PM, C Crane <ccrane148 at gmail.com> wrote:
> >> Unfortunately, nobody seems too interesting in transmitting.
> >
> > I think that is unfair. Perhaps it is more accurate that the Majority
> > of HackRF owners are not licensed to transmit, and so they don't.
> > Because there is tremendous value and fun to be had just on the
> > receiving side.
> >
> > _______________________________________________
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> >
> >
> >
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