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Now, you really cannot do a fair comparison of Rocky and PowerSDR. The PowerSDR software was developed to support the SDR-1000 which is MUCH more complex than the SR40. Support for the SR40 was added

I know the Delta-44 is the "preferred" sound card by many for SDR use, however I wonder which external card has shown the best performance for use with a laptop. The SB Audigy 2 NX USB and the SB

Hi Guys, I loaded the Rocky software last night. I was suprised to find that it seemed to make a better receiver with the SoftRock40 than the Flex software. Is it all in the mind? Prehaps the Flex

I don't know about you guys but I have had a great time using my SoftRock40 to study the band conditions. I have identified all kinds of noise sources within my shack, ethernet cables, battery

This is totally cool :-) Thank you very much :-) Phil Harman wrote:

I'm presently supervising a couple of overseas engineering students whilst they do their industrial training. They need 12 weeks of practical experience so they can obtain their degrees. They are both

wrote: system's better this. > > I seem to remember reading some place the QSD mixer had a noise figure in the area of 12 db ? Would this not be acceptable except maybe above 28 mhz since the

The first device in the received signal's path determines the system's noise figure. If it's a DBM, then the noise figure can't be any better than 6 dB. Putting a low noise preamp in front of the DBM

Hi, Leon. I'm following the Flex Radio Delta44 setup using Y adapters. http://www.flex-radio.com/delta44/delta44.htm Dick Patten wrote: Delta44 card. adapters or version of reliable jack

I would 'not' use a pre-amplifier stage. In the QEX article a gain of 6 was obtain from the input transformer which should be enough to overcome the losses in the BPF. Need to run the AADE program to

Thanks for the release of the new Rocky 1.1 code. Good stuff!! I've just started experimenting with it using some recorded .wav file signals. I am finding it works great for about 30 seconds or so and

If you are going to put a pre-amplifier in front of the QSD that I would suggest a better pre-amplifier than a MMic chip. They don't have the best IP3 figures in the world and can have a lot of noise.

I'm just getting round to connecting the SR-40 to my M-Audio Delta44 card. How are people doing this? I can either use 3.5 mm to 1/4" jack adapters or a couple of 1/4" jack plugs and cable. I've got a

Beta preview 3 will be out early this week and will contain significant bug fixes: Database problems, callback threading bugs, etc. IT IS BETA AFTER ALL. Thanks! Man do I like my SR40. Bob N4HY Bill

Jean-Claude, The 2N3866 post amp would not be needed. I get sufficient output from my pre-amp/mixer to drive the SR30. Bob WA6UFQ

SR Folks, Got my SR modified with a switch so I can select either crystal for 40 or 30 meters. Used a sub-mini SPDT toggle switch and soldered the crystals directly to the switch. The common switch

Good Morning All, I have posted a new schematic with a table started on the schematic page to include band-specific component values. The first example of the v5.0 SoftRock is playing nicely on 40