[Hackrf-dev] Hey, everybody

[Jonathan Guthrie]

Just as an aside, you know how "they" say that you should not use the 
"reply-to" field for mailing lists?  "They" are wrong and stupid.  That 
is all.

Yeah, but the EraSynth is five times the cost.  I'm writing all this 
down, but I don't know how much use it will be.  I don't even know what 
a Morpheus is, and Web searches for that term are not enlightening.

You know, I'm not all that interested in general coverage 1 MHz to 6 GHz 
stuff.  I would be more interested in something that did 100 kHz to 200 
MHz, because it suits what I want to do better and it seems like it 
would be a whole lot cheaper.

On 1/12/19 6:07 PM, Chuck McManis wrote:
> Hi Jonathan,
>
> Be aware that the 8 bit resolution of the DAC on the HackRF means that 
> you get quite a bit of quantization noise in the output. You can build 
> a filter bank to reduce those spurs but the end result is that the 
> HackRF's use as a signal generator is not as high as you might like. I 
> ended up getting one of the EraSynth ones off CrowdSupply when they 
> ran their first campaign and it has much lower phase noise and (in my 
> case) a wider range. I have used it as an LO with a mini-circuits 
> mixer to tune the entire amateur band for the HackRF (it also extended 
> the range of my HackRF to the 10Ghz bands as I can downconvert 10Ghz 
> to 1Ghz that the HackRF can handle nicely. While the Minicircuits 
> mixer is good to at least 10dBm I have not tried trancieving with it 
> yet.  I also picked up a Morpheus (cheap at $125) which has the mixer 
> built in, but it doesn't have the range that the Erasynth does.
>
> 73,
> --Chuck
> (AI6ZR)
>
>
>
>
> On Sat, Jan 12, 2019 at 8:38 AM Jonathan Guthrie <ka8kpn at ka8kpn.org 
> <mailto:ka8kpn at ka8kpn.org>> wrote:
>
>     Please allow me to introduce myself.  I'm Jonathan and I just
>     bought a
>     HackRF One with the intention of turning it into a software-defined
>     transceiver for amateur radio use.  I figure that a power
>     amplifier and
>     T/R switch can't be all that hard (yeah, I know, "famous last words")
>     and I'm a computer programmer at my day job so the software part
>     is at
>     least do-able.  The upshot is that I'm hoping that for a little
>     bit (or
>     a lot) of sweat equity, I can get an HF transceiver that is
>     similar to
>     commercial transceivers for a fraction of the cost.  That's the plan,
>     anyway.  I'm certain it'll be educational.
>
>     By looking over the recent archives, I see that other people have
>     tried
>     to do similar things, which is good because it means that I don't
>     have
>     to start from complete scratch.
>
>     For a long time, I been using one of those TV dongles as a
>     software-defined receiver to receive FM broadcast, 2m FM, and some 2m
>     and 70cm SSB/CW signals from satellites, so I don't have to climb
>     (much
>     of) a learning curve to work with GRC.
>
>     So far, I've plugged my HackRF One in to my Linux laptop and have
>     listened to some FM radio, and it seems to work.
>
>     At some point, I'm probably going to get another one so I can use
>     it as
>     a signal generator.  Lots of useful things you can do with a signal
>     generator.
>
>     Anyway, that's me.  If I have any questions about how to proceed,
>     I'll
>     let you know.
>
>     -- 
>     Jonathan Guthrie
>     ARS KA8KPN
>
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>     HackRF-dev at greatscottgadgets.com
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>

-- 
Jonathan Guthrie
ARS KA8KPN

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