Topband: SDR Mythbusters - ADC Overload myths debunked

[Tom W8JI]

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 at arach.net.au>
To: "Topband reflector" <topband at 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