Comments on: Do you truly understand the SDR concept?

By: Tobias

Tobias — Wed, 14 Apr 2010 16:47:53 +0000

Hey Greg!
Thanks for your comment! Indeed, I mixed up QSE with QSD. I just corrected it in the post. Thanks again for the notice!

By: Greg Overkamp

Greg Overkamp — Wed, 14 Apr 2010 12:24:52 +0000

The article states “The QSE mixes the RF signal into a baseband signal” when in fact a QSE does just the opposite. A Quadrature Sampling Exciter takes I and Q baseband as its inputs, and produces RF as its output. With the lofty title of “Do you truly understand the SDR concept?”, I would expect the author to do so.

By: Bob K7YB

Bob K7YB — Sun, 04 Apr 2010 18:06:49 +0000

Interesting site and I will bookmark it for future reference and education. I’m amazed by the excellent signal to noise (to my ear) characteristics of SDR on PA3FWM’s receiver. Got a shack full of old stuff (Drake 2b/Collins KWM2/etc) and newer gear (IC756/FT857)…but the NEW stuff (SDR) has me excited about the future of the hobby and the advances technology can bring.

By: Tout savoir sur le SDR |

Tout savoir sur le SDR | — Tue, 30 Mar 2010 09:16:01 +0000

[...] Pensez-vous vraiment comprendre le concept du SDR? PMSDR – Un interview avec IW3AUT [...]

By: Mike N4GU

Mike N4GU — Mon, 08 Feb 2010 17:14:34 +0000

Much work has been done (and continues to be done) in the amateur community focusing on the RF and signal processing portions of the SDR. The user interface is lagging behind. Keyboards as input control devices are not optimal. As a UI for tuning in a radio signal, you can’t beat a knob as a man-machine interface. Yes, there are some knobs out there, but the potential, and acceptance, of the SDR will occur when we can customize the UI as easily as the other elements.

Very good piece, Tobias.

73, Mike N4GU

By: DL5RMH

DL5RMH — Mon, 08 Feb 2010 15:19:50 +0000

Hi Tobi, thanks for this very interesting article. I hope to get my Softrock SDR working as soon as possible to expore SDR by myself.
73s de Martin, DL5RMH

By: Gary S

Gary S — Mon, 08 Feb 2010 12:11:16 +0000

SDR is the future and yes its getting much closer

Myself, I am coming from 10 years out of amateur radio except for listening with a ft-817 for last few.

I’m tired of buying “appliances” and want the pleasure of doing some building and it looks like SDR is definately the way to go. The HPSDR project has the “Hermes” coming soon (for rx/tx) but the “funkamateur” will probably be cheaper and sooner.

I still am looking for the one I never had, a Drake TR4c which was the “item” when I became a ham, back in the mid ’70′s.

73′s
Gary

By: Scot R. Morrison

Scot R. Morrison — Sun, 07 Feb 2010 13:15:07 +0000

A new species of high frequency (HF) radio is evolving and its technological maturity is at least a decade or two down the road. Anyone, like yourself, who envisions a software defined radio (SDR) future is already ahead of the curve, in fact, pioneering our HF frontier.

I’m building out my HF station, slowly, ever so slowly and I see SDR technology in the shack. Perhaps, in the beginning, as a means to improve receive capabilities, additionally, I’m hedging a future when SDR will significantly impact and improve HF low power operations.

You are blazing the trail toward a new frontier where a new species of HF radio already exists.

73
KA3DRR

By: davor kordic

davor kordic — Sun, 07 Feb 2010 07:33:45 +0000

Hello Tobias

Tks for contact about SDR. I made two peaces of SDR receiver this year. First one ZETA SDR for 40m and second is DR 2++ from YU1LM but I have a few days to finish double symmetric supply for it HI.
For this moment I experiment with one receiving wire antenna made from old small transformer about 10 m long to the nearest three HI. It works. I have old 16 bit sound Creative Labs and for this moment software is Rocky and M0KGK decoder becouse my old 1.1 GHz computer.I just try to connect signal from Creative Labs receiving sound card to second on board receiving sound card reserved for MixW2 couse I heard yesterday afternoon good RTTY signal.Excuse me about my website because I made it with old tools and is on Croatian language only but you can see our radio club IOTA expeditions and my small hobbies electronic area. The SDR pages are still waiting to be fulfilled.

73 Davor

By: dan

dan — Sun, 07 Feb 2010 06:02:30 +0000

good work, tobias. except there is a real latency with web based receivers that cannont match real
time signal sampling from MY antenna, hi. WHEN i can hear the sigs anyway…