SDR 1 :Notes ( for entertainment purpose only ):
2009 : The project is a SDR Transceiver, all bands, with a 10W output power, to work most of the time
SSB, on 17m, 20m and 40m.
As a collector of QRP rigs, I currently use a TL120 amplifier ( 100W ) to give more confortable signals to my
partners. It will be used when necessary with the SDR.
I have decided to keep the rx filters and the 1W PA/tx filter from Softrock instead to move on to the MOBO project which gives a complete all bands TX/RX
without manual change or switching. No serious reason for that, except at the time I bought the kit, MOBO4.3 was restricted to beta testers.
Costs of all my kits (Softrock 6,3 with all filters, PA2008, and extra LP filter) is around 200 usd, just a little bit less than the 6,3 + MOBO, as
far as I know. So today, my choice would be different, may be. Learn about MOBO here
Building the kits is easy, if you follow the instructions, it must work immediatly ( as several builder, I just had to replace Q7 on the main
board...) - The few cms are easy to install if you have good eyes, or/and
as me, the help of a glass.
The most issue and the longer step is to find the right webpage where are written the answers to your questions !
I give a list hereunder to make your sourcing faster, but there are a lot of other people working on the subject.
Softrock 6.3 ( main board, filters for RX, PA and LPF for TX )
Availability, Pricing, and Ordering can be found at Tony's website. http://fivedash.com/
check it every day, or every hour ! until he opens the door.... Unfortunatly he is victim of his success, and it becomes difficult to have the chance to put the order of the requested items.
Now replaced by RX/TX ensemble, same design but all on one card, for 2 or
3 bands to choose yourself during building.
and immediatly register on the softrock group http://groups.yahoo.com/group/softrock40/messages
You will find a lot of answers, and may ask questions.
THE MAIN WEBSITE to build all softrock kits :How to build step by step
( new site on http://www.wb5rvz.org/
USB I2C interface ( to get full control of frequency, band, ptt, and cw key, via the software )
See instructions on http://www.wb5rvz.com/sdr/usb_i2c/
The driver is found at Fred Krom's PE0FKO website http://home.ict.nl/~fredkrom/pe0fko/SR-V9-Si570/
See also Fred's CFGSR web page http://home.ict.nl/~fredkrom/pe0fko/CFGSR
You need it to program the Si570 chip
Run the CFGR.exe program and follow the instructions on Fred's site.
Functional Test Setup
The functional testing of this kit assumes you will be using the Rocky SDR program
to control your Local Oscillator and set your center frequencies.
10W amplifier may be bought as a kit from DL2FI on QRPproject http://www.qrpproject.de/UK/qrppa2008.html
- easy to build and tune, it will work at first start.
LOW PASS FILTER
I use a switchable filter from Virgil K5OOR available as a kit from HFprojects
- no comment. http://www.hfprojectsyahoo.com/lowpassfilters.html
All these kits are assemblied inside an ABS RFI shelded box available at radiospares
( find with google)
ref 501-581 190mm*110mm*60mm, on a prototype mother board easy to
clic on the photo to see
- Rocky to download from Alex VE3NEA http://www.dxatlas.com/Rocky/
- SSB is not included in TX mode.
- PowerSDR-iq release 184.108.40.206 from SVIEIA works well in SSB (XP and W7
32bits)but you may get troubles with audio monitor in TX/SSB if you connect the local audio with
VAC with a sound card like the E-MU202 that is not tested by Flex.See http://groups.yahoo.com/group/powersdr-iq/message/1185
- Automatic rejection of image works very well in this release. See
with a lot of ideas and files to help in your configuration job. Also http://www.wb5rvz.com/sdr/ensemble/psdriq.htm
with the annoucement of a new high quality sound card USB2SDR by SV1EIA.
Download 220.127.116.11 from http://code.google.com/p/powersdr-iq/downloads/list
and download the skins from the files on yahoo's group.
- Older PowerSDR by SV1EIA 1.12.20 solves the previous
issue (XP only); I/Q
Balancing is made by pressing the EIA button as shown on the photo
hereunder ; the only soft to work SSB with
6,3 with my sound system ( USB box E-MU 0202 for I/Q IN and OUT, and a usb
headset for local audio). One thing
to know if audio output seems weak, move on one side the cursor of the Sub
RX, as when let in the middle, the audio is off on a usb headset - download it from http://code.google.com/p/powersdr-iq/downloads/list and
download the manuel from the next link - I also use this release to work
WSPR - See how I have done here.
My experience is there is not a "good" solution, but one that must (! we hope
for you !) fit your design ( depends on the sound cards, the OS and the
computer you are using - I tried with a Shuttle Atom Dual Core D510, and
if the drivers does work well, the processor is not enough strong to get a
good sound quality).
I use an E-MU
0202 usb sound box for I/Q in and out (192kb) , and an USB headset for local audio (
48 kB - mic and speaker ). But I believe there is
less issue when using a four channels sound card like the famous Delta 44.
Balancing of I/Q signals must be done with care, see also the procedure in
SDR1000 Operation Manuel page 73 http://powersdr-sr40.svn.sourceforge.net/viewvc/*checkout*/powersdr-sr40/trunk/Documentation/SDR-1000_Operating_Manual.pdf
USEFULL LINKS on SOFTROCKS
And a lot of links to learn about these fantastic new toys :
Don't miss Alan pages G4ZVQ, a lot of usefull informations at http://homepages.wightcable.net/~g4zfq/Si570.htm
To play with WSPR, read Alan notes on http://sites.google.com/site/g4zfqradio/softrock-wspr-psdr-and-vac
and learn about this mode at K1JT pages http://www.physics.princeton.edu/pulsar/K1JT/wspr.html -
See my page to help in configuring the softwares to work WSPR.
To learn about VAC ( what is that ?) go on YT1DL site http://yt1dl.veze.net/sdr3.html
, and enjoy digital modes. & download and install "build226" vCOM driver from N8VP
Experiences and informations
- KD5TFD http://www.ewjt.com/kd5tfd/sdr1k-notebook/sr40/index.html
- N9VV http://www.n9vv.com/hamradio.html
- DH1TW http://www.dh1tw.de/softrock-kits-sold-in-2009
- Play with SDR without any hardware :
web SDR http://sdr-radio.com/OnAirServers.aspx
- webSDR http://sdr-radio.com/OnAirServers.aspx
- webSDR at W4MQ http://www.w4mq.com/
Et pour les pratiquants de la langue française , voir régulièrement les pages de F6CRP
Where to find these radios ? clic
: 2010 : FA-SDR-TRX kit from DL2EWN, sold by
under following references :BX200 ( TRX ), BX202 ( 1W amp ), BX-026
(synthetiser with Si570 :FA-SY1), and BX-201 ( box : FA-Gehäuse zum
FA-SDR-TRX) for a total cost around 240 Euro. This kit gives a 1 W
SSB, CW, PSK, WSPR & co... ALL HF BANDS TRX from 160m to 10m,
may be 6m ( didn't test) without any change of filter or any card as
you do with the Softrock kit. Results seems as good as Softrock, may
be more quiet and sensitive, but I cannot make serious measurements.
Read comments on Tobias blog dh1tw
|An easy kit
to build, complete, that will work immediatly with your usual
softwares ( same as for the softrock). Only ONE day to build it,
instead of 4 or more for the Softrock !
|2011 : I have completed
my FA line with a 10 W amplifier and the specific sound card
USB2SDR made by SVIEIA - see details here
|2012 : remote station
with ghpSDR3-Alex client/server software running on a small
Linux processor card - see the page
NEXT TIME...may be
more than a
century, (one analog monobander in the 20th, and the SDR Softrock in beginning of the 21th !),
constructing the FA-SDR this end of 2010 year !
may be the next one will be an Hermes based SDR, with digital I/Q and no need of balancing. See the wiki