None of the below has anything to do with overload from local transmitters.
:)
Or did I miss that part?
----- Original Message -----
From: "Steve Ireland" <vk6vz@arach.net.au>
To: "Topband reflector" <topband@contesting.com>
Sent: Tuesday, October 06, 2015 9:51 PM
Subject: Re: Topband: SDR Mythbusters - ADC Overload myths debunked
G’day all
As someone who has extensively used a digital down conversion/digital up
conversion transceiver (original HPSDR) on the Topband, it is good to see
this myth being debunked publicly as much as possible. Another station who
has used an HPSDR even more extensively than me on Topband is Greg ZL3IX,
who may be interested in commenting.
For about 18 months I used the HPSDR transceiver alongside a ‘benchmark’
Elecraft K3 in contests and for DXing, alongside keen contester/DXers
VK6LW (about 3km away) and VK6DXI SK (about 30km away) running full power
on Topband and the other bands. I could work equally close (within 500Hz)
to Kevin and Mirek on the HPSDR as I could on the K3.
The brick-wall sided constantly variable filtering provided by the fully
digital HPSDR and its associated OpenHPSDR software and the way this
filtering handled noise in comparison to the K3’s digital filtering made
the HPSDR a superior radio for weak signal DXing – simply put, I could
read S2/S3 signals on the HPSDR in a 50Hz bandwidth that were unreadable
on the K3.
The only problem for me is that using computers day in, day out at work, I
loathe using them for radio and hate spending my evenings fiddling around
with software, so the HPSDR has finally gone (mind you, so has the K3 –
loved the radio but hated the audio and went and bought an old Orion 2
which sounds waaay better to my ears).
DDC/DUC radios handle strong signals as well as the best of analogue
radios – the only question for topbanders is whether you like their
ergonomics and the whole idea of having a digital radio.
Vy 73
Steve, VK6VZ
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