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SR-40 folks, Through the generosity of one of our list members, PowerSDR-v1.4.4 for the SR-40 is now running on my Dell 8100 laptop and XP Pro OS. That after installing MSdotNET Framework and SP1. Now to build the kit and see if it all really works...[g] If anyone who lives in the sticks like me or elsewhere with only a slow dial-up, or other download problems, would like a copy let me know and I'll send a CD in exchange for a blank CD-R and postage. (I'm retired on a limited income.) The CD will include MS .NET Framework and it's SP1. If downloading the PowerSDR-v1.4.4 software and Bill, KD5TFD's SR-40 overlay is also a problem, that can be included too. Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72 es <oo> 50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun = QRP since 1984. www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP www.netxqrp.com

I came to a similar conclusion last night, the radio was acting like it's RF gain was way down. I discovered that by turning up the AGC gain I could hear the crud between signals. At first I turned it way up, but after a while it got old hearing all that noise, so I started turning it down a little bit at a time, until I arrived at a value that would let me hear weak signals yet barely hear the constant crud. That is a pretty nice feature, I have a FT-817 and one of it's failings is that the AGC cranks up the gain so high when there is no signal, that it drives crazy with all the noise. I resort to manual gain and you get a much nicer result. I've been playing with the settings on the software and cranked up the DSP buffer to 2048, that makes the filters really much sharper, yet it doesn't seem to eat too much more CPU time. The two displays are the ones that eat up the CPU. One more question; the ASIO4all has setting for using DMA for the transfers, I have not seen anything on it, it seems to cut down CPU usage by a few %, Is this recommended, using DMA on the sound card transfers? Thanks Cecil Bayona KD5NWA www.qrpradio.com I fail to see why doing the same thing over and over and getting the same results every time is insanity: I've almost proved it isn't; only a few more tests now and I'm sure results will differ this time ...

Folks, According the to MS dotNet Website, Framework v1.1 is Redistributable. I verified this with my favorite MS licensed MIS person yesterday. It's permitted as a convenience so users of licensed developer software don't have to go to the website for a lengthy download. This statement appears to be incorrect in this instance... <quote> > I would respectfully point out that the .net framework and SP1 are, while > available for free download to licensed users of Windows, never the less > copyrighted software, and MicroSoft likely would not like people > independently distributing copies on CDs ... </quote> Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72 <oo> 50 years -- 19 - K2OFN, 31 - W5USJ -|- Most fun = QRP since 1984 www.w5usj.com hosted by Hamnutz.com -|- www.netxqrp.org

Hello All This is probably basic to most of you but how do I find the sampling rate of my sound card? I have a 1.3g cpu motherboard with the sound card part of the motherboard. W98SE. I know the sound works but that is about it. I do not like messing with what works. Below is from the documentation and I have the mobo cd. The mobo is a M810LMR. AC97 Codec Compliant PC97 2.1 specification Supports 18-bit ADC (Analog Digital Converter) and DAC (Digital Analog Converter) as well as 18-bit stereo full-duplex codec I suppose I could feed in an audio signal but there must be a way using the software to figure this out. After all, it is a computer. Thank you. Richard

Hello everyone, I have had a very strong response to my offer for crystals to put the SR40 on 30M. As of this writing, Sept 25 @ 10:00pm EDT nearly 80 crystals have been spoken for. I have packaged and will be shipping out 34 orders containing a total of 64 crystals. If you paid via PayPal, and received a confirmation email from me, your crystals are going in tomorrow's mail. I am holding crystals for others who are sending checks. At this point, I can accept orders for about 15 more crystals. PLEASE email me to check availability BEFORE sending any payment. I am working on obtaining more crystals, and will post another message when I am certain of my ability to restock. Thanks once again to all who have expressed interest. 73, Bruce N1RX

Good Morning All, I am continuing to offer built/tested v4.0 SoftRock40 receivers in trade for your kit plus a $15 check. (The $15 includes postage back to your QTH.) In the last few days I have shipped ten built/tested SoftRocks and have another ten ready for immediate shipment. If you would like to save the three hour plus build time, just send your kit to me at: Tony Parks 1344 E 750 N Springport, IN 47386 Thanks and 73, Tony KB9YIG

Hello everyone. I have uploaded two pictures to show the changes needed to put the SoftRock on 30 meters. Those of you who are waiting on 40.500 Mhz crystals from me are going to need two 33pF caps to replace C6 and C7 in the local oscillator. Most of the crystals that have been ordered shipped today. Let me know if there are any questions. -Bruce N1RX

I have just added two photos showing how to modify the power input of the SoftRock. This is one way to provide power if you do not want to run it from the USB port. Some have reported a lower noise-floor when isolating the radio's power from the PC. Q1 is replaced by 78L05 5 volt regulator. R1 is not installed. In it's place, a higher voltage version of C2 is used. I recommend something with a rating higher than the 16volt cap supplied for C2 in the kit. I used a 35volt tantalum cap. The original position for C2 is filled by a jumper wire. This makes a convenient ground poit for testing. In the close-up photo, you can also see C8, the coupling cap from the local oscillator, has been mounted in a 2 pin header. This makes it easy to disconnect the onboard oscillator. This way, you can use an external clock source, like a DDS, in place of the crystal oscillator. 73, Bruce N1RX

Today I went shopping for a fine pair of tweezers and a light/magnifier glass for building the SR-40. I looked here, I look there, nothing worth spending $1 on, until someone sent me to Hobby Lobby, I struck out there too. As I exited the building across the parking lot I saw something that I had not seen before , it made me take a good hard look to make sure I wasn't dreaming it up. A Harbor Freight Store, I was not aware there was one. Apparently they were recently added to a manufacturers mall just outside of town (5 minutes drive). I immediately checked them out and lo an behold really fine tweezers for a reasonable price, and a nice looking lamp, and ... $90 later I left the place before I could go broke. They also informed me they would match any Internet price or catalog price. I took their sale catalog for this weekend's sidewalk sale. Huh, three iron skillets for $9.99, I need some of those too. It keeps getting better, when I got home, there was my order from the AMQRP club , after supper it's time to mount the light on my worktable and see if I can work with those darned tiny parts. Some days are good, some days are so so, today was a good day. -- Cecil KD5NWA <www.qrpradio.com> I fail to see why doing the same thing over and over and getting the same results every time is insanity: I've almost proved it isn't; only a few more tests now and I'm sure results will differ this time ...

I put the lamp from Harbor Freight on my workbench, and I highly recommend it, I can now see the board and the parts clear as could be. The lamp is a circular florescent and the illumination is nice and even with no glare or shadows. If you are 40+ or have vision problems I highly recommend it, I had another lamp from Lowes with an incandescent light bulb and the difference between them is incredible. It cost $27 and it's worth every penny. Disclaimer: I own the lamp company and want you to buy it so I can retire as a rich pig in Tahiti, and if you believe that, I also sell bridges and have a real good deal on one in Manhattan . -- Cecil KD5NWA <www.qrpradio.com> I fail to see why doing the same thing over and over and getting the same results every time is insanity: I've almost proved it isn't; only a few more tests now and I'm sure results will differ this time ...

My SoftRock-40 kit has just materialised, here in the UK. 8-) 73, Leon -- Leon Heller, G1HSM leon.heller@... http://www.geocities.com/leon_heller -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.6/111 - Release Date: 23/09/2005 --- [This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are currently using to read this email. ]

I wound the coil this morning, left it on my desk, and then went out, meaning to solder it in place when I got back. When I returned it had disappeared. Babbage, my Burmese cat, had obviously come across it and, as he usually does with small objects he hasn't seen before, had been playing with it and left it somewhere. I spent several minutes searching for it (the carpets are red, which doesn't help) and had just resigned myself to winding another one (I've got a good selection of cores) when I thought I'd check the stairs and found it about half-way down. 8-) 73, Leon -- Leon Heller, G1HSM leon.heller@... http://www.geocities.com/leon_heller --- [This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are currently using to read this email. ]

Have you ever read the best seller: http://www.amazon.com/exec/obidos/tg/detail/-/0517545160/qid=1127909371/sr=8-1/ref=pd_bbs_1/102-9832450-0868126?v=glance&s=books&n=507846 Just kidding. I love my own cat but (thank goodness) she hates my work bench. Bob Leon Heller wrote:

We are in the process of backing up and punting instead. I've been advised to move the crystal frequency of SR-40 by 12KHz on the low or on the high side, to get away from some of the noise in the center of the receivers band. Not an easy job due to lack of crystals at those high frequencies, I found one 17 KHz low, too low for my taste. I'll be checking for something closer later when I get a break. Any guesses as to how low could I pull a 35.328 MHz crystal? 48KHz lower? I kept the names of the interested parties, and will keep you posted.

For people interested in using the SR-40 for dedicated purpose, I was nosing through the Mouser Catalog on line and they have for reasonable prices both crystals and little 3.3Volt oscillator modules to move the SoftRock 40 to the following useful frequencies; 3.579 MHz 80 Meter watering hole, changes to filter needed (14.318 MHz) 4.912 MHz Popular IF frequency, changes to filter needed (19.660 MHz) 8.830 MHz Kenwood IF frequency, no changes to the filter (35.328MHz) 9.0 MHz Ten-Tec and popular IF frequency, no changes to the filter (36 MHz) Some of those frequencies come out a KHz or thereabout off the correct frequency, but since the SR-40 can tune +- 24 KHz it comes out in the wash. The crystals are anywhere from $.42 to about $2, and the complete modules are from $1.92 to $3 I'm going to get me some crystals and Osc. modules for 8.830, and crystals for the rest, to play around with. Nothing like a SR-40 with a TS-940sat for a front end, talk about opposite ends of the spectrum, it will be my SR-40 that can go everywhere with one heck of a front end, or my TS-940sat with Panoramic display. If one or two guys/gals are interested in getting a OSC module for 8.830MHz the Kenwood panoramic output on the back of the radio, let me know before tomorrow night and I'll include an extra module for you for cost + shipping. I'll send a last call before sending out the purchase order. Cecil Bayona KD5NWA www.qrpradio.com 'Never argue with an idiot. They drag you down to their level then beat you with experience.'

Hi All, Question. Does Power SDR software provide a "Variable Beat or Carrier Oscillator"? Perhaps 2 ? What is the freq range of that oscillator ( up to 48 or 96 kHz ? ) 73 Rein W6/PA0ZN KD5NWA wrote:

The other part of the equation is the computer and sound card. What is recommended ? I know that previous SDR discussion revolved around some of the better Creative Labs sound cards and at one time the Turtle Beach SantaCruz sound card was recommended as a good low noise card for SDR. Lately all I see recommended as the best card is the Delta 4? sound card. Since this SR40 really does not have the performance of the much better and more sophisticated SDR-1000, is the sound card selection all that important ? I did pick up a SantaCruz card at Fry's for $40 which is all I want to spend. 73 Kees K5BCQ

I finished the SoftRock last night and I plugged it in to one of my USB hubs...no green light from the LED. I put it back on the bench and verified everything and all looked ok. After messing with it for a while and still not getting a green LED from my USB hub, I decided to plug it in to the USB on the back of the computer...GREEN LIGHT. Wondering why the USB hub doesn't put out 5 volts, but will worry about that later. I thought that the 5 volts daisy chained from device to device. So, it lit up, but I am not receiving anything. The latest binary was acting really weird on my computer, so I reinstalled PowerSDR and then unzipped the binary's from August in to the SDR install. It appears to work ok now, I think. I have no way of verifying that. All I get is a little background noise (I got this before though) and a solid S-9 carrier at 7.056, but this is ALL I ever got from the software whenever I would start it up with NO hardware. So, I hope this is making sense, the SR-40 is either not working properly, or the software is not working. I can play the canned .wav files and that works, but nothing from the SR-40. Made sure my LINE-IN port on the soundcard was selected, and checked that the volume was up sufficiently. I don't know what else to check, or how to check it. I am electronically challenged, sorry guys. Plus it is hard to get back behind the PC to do anything. I don't have a 5 volt power supply. Can I use a 6 volt wall wart?? I didn't see a 5 volt regulator on the SR-40. Can someone tell me where to start? And what about the S-9 carrier at 7.056?? Is that supposed to be there?? I do have an XG-1 signal source, but I'm not getting anything to the software. Thanks, Stan Rife W5EWA Houston, TX K2 S/N 4216

I ordered a pair of crystals at three different frequencies close to the Kenwood IF. One set on the high side, two sets on the low side, inductors, and trimmer capacitors to see which one is the easiest to be able to park the SR-40 so I can look at +-10KHz on the Kenwood radio without getting signals close to the baseband. When I get it figured out, I will let the list know which one worked the best, and we could then order a group buy. I ordered the following crystals; 35.2512MHz, push this one 20.8KHz up, crystals are cheap, about $0.42 each 35.3037MHz, pull this one 28 KHz down, about $4 each 35.3280MHz, pull this one 56 KHz down, about $1.44 each Stay tuned, same bat time, same bat channel, but hopefully a different bat frequency. Now where is that frequency counter? Cecil Bayona KD5NWA www.qrpradio.com 'Never argue with an idiot. They drag you down to their level then beat you with experience.'

Good Afternoon All, As I continue to build SoftRock40 kits for various hams I now have ten extra built/tested v4.0 SoftRock40 receivers for sale at $38 each. This price includes mailing cost to your QTH. Each receiver has been tested to make sure the image null works properly and that the MDS is better than -130 dBm. If you would like one of these receivers, send me an e-mail. If you are not satisfied with the receiver after you get it, I will refund your money and pay the return postage costs. Thanks and 73, Tony KB9YIG