Comments on: FA-SDR-TRX, an allband & low budget SDR TRX

By: Kopke

Kopke — Wed, 14 Jul 2010 08:59:36 +0000

Today i received the kit: I was stunned about the good quality of the kit.
I can really recommend it!

Be aware that beside the SDR kit, at minimum you need the FY-SY synthesizer kit as well.
I also ordered the 1W amplifier kit and the casing for the kit.
The latter is also of very high quality.

By: Kees PA5CW

Kees PA5CW — Tue, 29 Jun 2010 13:03:24 +0000

Is the software installation correct:
1. new DLL from CD rom
2. First define softroc si570 and tick the usb box
3. define flexradio as tranceiver.
4. is transmit enabled

If you push transmit, you should see dBm in screen and when you talk, cariier in screen should move.

Do you use 2 soundcards with softrock?
You need 1 for receive and 1 (EMU) for transmit.
Kees PA5CW
mail also in qrz.com

By: Martin, OE6MWG

Martin, OE6MWG — Tue, 22 Jun 2010 17:35:46 +0000

Würde etwas Hilfe benötigen. RX funktioniert einwandfrei – TX macht Probleme. Sender schaltet auf Sendung, es geht auch Leistung raus … aber kaum messbar…. auch dann nicht, wenn die 1-w-PA aktiviert wird. Stromaufnahme steigt auch nicht an. Die Aussendung ist ein Pfeifton … auch wenn nichts am Eingang hängt. Mit R1 und R3 sollte man auch noch die Spiegelfrequenz unterdrücken können …. hier weichen die von mir gemessenen Werte aber von denen der FA ab …. und wenn man die Schleifer verstellt, verändert sich die Spannung auch nicht …..

Irgendjemand ne Idee??

Vy 73′s
Martin

PS: Mail-Adresse findet ihr bei QRZ.com

By: Mark Vice

Mark Vice — Sat, 12 Jun 2010 23:33:57 +0000

Great post!

By: Kees PA5CW

Kees PA5CW — Sat, 12 Jun 2010 09:25:51 +0000

I have the FA-Syn working.

It was shortcut in pcb.

Kees PA5CW

By: Herbert

Herbert — Sat, 13 Mar 2010 00:27:24 +0000

Gut zu Wissen. Kommt hier noch ein Folgeartikel? Möchte gern mehr darüber wissen. Könntest du mir per Mail eine Antwort geben?

By: Mario, S56A

Mario, S56A — Tue, 15 Dec 2009 15:24:59 +0000

I worked YU1LM in CQ WW CW with new G9 xcvr! I was SOAB HP even without CW Skimmer. I prefer preselector with two serial circuits in series and coupling capacitor in the middle directly on 50 Ohm. Not suitable for 10/15 m but two more in/out caps can be added. I had SMD 1 uH and 4,7 uH coils.
Nice to hear OM Tom, DL7AV mentioned. My article on FT1K IF SDR with 455 kHz ceramic resonator tuned 12 kHz lower in serial resonance is in forthcoming CQ ZRS with due credit to Toby, DH1TW.

MX & HNY & LP MMM S56A, N1YU

By: Tobias

Tobias — Mon, 12 Oct 2009 01:24:31 +0000

Hi Art,
You can find the original paper of the BCC (DL7AV) Preselector on the webpage of the Bavarian Contest Club at http://www.bavarian-contest-club.de/projects/presel/presel.pdf Unfortunately it’s in German. I suggest the following step:
1. Download the PDF with the schematics
2. Use Google Translate (http://bit.ly/cLJtM); it’s give you a rough idea about the content

73 Tobias

By: Art, KY1K

Art, KY1K — Sat, 10 Oct 2009 20:22:26 +0000

I’m involved in a similar project called the MOBO.

I note your reference to a DL7AV preselector, which can potentially replace allot of individual tuned circuits and is very much needed by the softrock community. Where can I get information on the DL7AV preselector?

Thanks,

Art

By: James Williams

James Williams — Sat, 10 Oct 2009 14:39:07 +0000

Tnx for info…