Has anyone made any measurements on the SR series of receivers? What is the NF, MDS, 3rd order input IP, SFDR? What are the band pass characteristics of the...
Hi Tony - I'll be happy to take one of the v6 built rigs off your hands. Give me the OK and a Paypal address, and I will send funds immediately. 73 de Lee ...
Very good Lee. I will be able to mail your 40m/80m SoftRock receiver on Monday, July 3. My PayPal address is raparks@... Thanks and 73, Tony KB9YIG ...
Hi Ken, Nice to hear from you but sorry that your SoftRock is not playing properly. Would you like me to take a look since I am getting pretty experienced at...
Good morning all, I'm a new member and wanted to introduce myself. The name is Ben Hall, call KD5BYB, and I live just north of Huntsville Alabama, USA. I...
I am building a transceiver around a slightly modified IQPro VFO. The output from the VFO is TTL-level squarewave. This is fed to the mixer on the softrock (in...
I am using Jan Wagner's (oh2ghr) latest receiver (basic SDR-1000 design with additional oscillator configurations). The DDS Board Giuliano's (i0cg) DDS board...
Hi Joe, I have a new batch in process now that will be available for mailing early this week. An order today would get a built 40m/80m v6.0 SoftRock receiver...
Good evening all, I hate to dig up old information, but I want to query the group. Is the method below (feeding base of Q2 thru a cap) the preferred way of ...
Hi Davide, I have a DDS-60 from AMQRP http://www.amqrp.org/kits/dds60/index.html that I use with several different versions of the SoftRock. Apart from some...
Hi John, thanks for the info, I will use the AD9951 generator from the miniVNA (http://groups.yahoo.com/group/analyzer_iw3hev), I was wondering if the -2 dBm...
... I just replaced the crystal with DDS60 output. This gives me a possibility to use either a crystal or DDS60. It's not beautiful but it works. //jarmo...
The spec for the DDS-60 says the output is 'fully adjustable to +16 dBm, or about 4V p-p'. I am running it at about 2.5v p-p. John ... -- -- John Melton Sun...
Finally got off my butt and powered up my 80/40 Softrock into the Delta 66 - and it works like a beauty. (I couldn't believe it either...) Good image rejection...
Hi Ben, In all cases I have not populated Xtal/2n3904 oscillator circuit and I have also put a 50 ohm termination across the input from the DDS-60. V4 -...
John, You seem to have a lot of experience with the DDS60 as a VFO driving the SoftRock series. My experience has been with the V5 where I found the amount of...
The 50 ohm termination does help somewhat and, yes, it is before the 47pf cap. There are still frequencies where there are many spurs across the 48/96 KHz...
John, I have idea to design I/Q generator with 2 AD9951 or AD9954 to avoid the X4 factor, I have some doubt about the internal AD9954 comparator, did you...
The first low value resistor I came across was 42 ohms so installed that across the DDS60 output. The spur population is now much less. I do not think that you...
... Hi John -- congratulations! I got mine up and running this weekend too but using the Rocky software I could hear very few signals. Does the choice of...
Hi Doc, Low sensitivity can result if the secondary windings of T1 are not wired correctly. A visual check is to make sure a lead from the top of the T1 core...
Hi, Just wondering what the diference between the V6 and V7 is, (what frequency does the V7 cover and what xtal multiplier does it use?), I have built a V6,...
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