Re: [Flexradio] diversity reception
Lee, You obviously need two antennas and two sets of analog components. Why don't you try the AmQRP Soft Rock 40 as a second analog device? You may be able to run two copies of Power SDR Console from different directories. You should also be able to run SO2R which may be of interest to some. I have a K2/100 sitting along side the computer, and I may be able to use it in SO2R, using third party software to control the K2. It would need some software mods to the SDR Power Console to run dual diversity operation. 73, Chas, W1CG At 02:15 PM 1/8/2006, Lee A Crocker wrote: I have an interest in diversity reception. Therefore one would need essentially 2 antennas, 2 revievers locked to the same freq, and a way to mix the audio stream from each receiver. I would like this in the context of being able to transmit also on one freq which may be offset from the RX freq. The Orion presently offers this, as does some of the 10K boxes. Diversity in the Orion however relies on a very good RX and a second poorer quatily RX, where RX's of similiar quality would be desireable. Any comments on how the SDR might be modified to provide diversity reception? 73 W9OY __ Yahoo! DSL Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
[Flexradio] Failure on start-up
New installation of PowerSDr c1.4.4 on Athlon 1.4 + Santa Cruz running XP SP1 and I get fatal error: Object reference not set to an instance of an object at Microsoft.Directx.DirectInput.Manager.GetDevices(DeviceClass deviceType,EnumDeviceFlags(flags) at CWKeyer.Paddle..ctor() .. .. I did note this on one of the forums and Eric suggested I reinstall Directx - actually I was one step ahead - I'd already gone and added all upgrades to SP1 and then reinstalled latest DirectX (directx_dec2005_redist.exe) - then uninstalled and reinstalled PowerSDR and, of course, rebooted. Still the same error - any ideas on what to try next or how to get more useful debug info? Thanks Brian
Re: [Flexradio] Failure on start-up
Brian, You need to try reloading the video drivers as well. Do a complete un-install using Device Manager. After you reboot,. do not let Windows install drivers specific for your video adapter. Use the default VGA driver. Once that loads OK, then install your updated video drivers. Make sure they support DirectX 9c. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Jones Sent: Monday, January 09, 2006 2:11 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Failure on start-up New installation of PowerSDr c1.4.4 on Athlon 1.4 + Santa Cruz running XP SP1 and I get fatal error: Object reference not set to an instance of an object at Microsoft.Directx.DirectInput.Manager.GetDevices(DeviceClass deviceType,EnumDeviceFlags(flags) at CWKeyer.Paddle..ctor() .. .. I did note this on one of the forums and Eric suggested I reinstall Directx - actually I was one step ahead - I'd already gone and added all upgrades to SP1 and then reinstalled latest DirectX (directx_dec2005_redist.exe) - then uninstalled and reinstalled PowerSDR and, of course, rebooted. Still the same error - any ideas on what to try next or how to get more useful debug info? Thanks Brian
Re: [Flexradio] RF Noise from Presonus Firebox
Hi Ross, That was good timing of your inquiry about the Firebox noise! I just returned from a four-day DXpedition (chasing foreign MW and tropical bands) to the Washington coast, and encountered noise from my Firebox, too. This was my first serious use of my relatively-new SDR-1000 and I had not noticed any noise at my home location (fairly RF-quiet). However, in a DC-only DXpedition setting with zero noise other than atmospheric, any RFI is immediately noticed. I tracked down a pulsing, broadband hissing noise to the Firewire DC input, which is connected to my deep-cycle batteries via a distribution systemfeeding all other DC gear. With all other equipment turned off, I noticed no difference in the noise level when unplugging the I/O cables and the Firewire cable. The only thing remaining was radiation from the unit's case or power cable, or conduction via the power cable. I tried temporarily grounding the Firebox's metal case, without effect. I happened to have a Amidon FT-140-J torroid core (1.40" diameter)on hand, so I did a field mod of cramming as many turns of the DC cable through the torroid as would fit. The coaxial DC connector is attached less than an inch past the torroid. Voila... noise gone! The only noises remaining were very low-level spikes and buzzes here and there, visible on the panadapter. I tracked these down to RFI emanating from the Compaq X1000US laptop screen (noises change pitch and intensity when I touch myhand to the surrounding LCD cover, aluminum in the X1000 series). I don't know if the RFI is coming directly from the laptop(screen) casing, or going outthrough the various parallel USB cables. I've always thought this was a pretty quiet laptop, but the SDR-1000 shows up any little signal ina RF-quiet environment.In the future I'm going to experiment with RFI clamp-on ferrites on every cable. By the way, after calibrating the SDR-1000's level with a XG-1, the background noise with Beverage antenna attached was around-132 dBm at medium preamp setting, and -140 to -144 dBm at the high setting. Very impressive! These readings were just after local dawn at the coast, where noise levels canbe eerily low in mid-winters (WA State has the fewest T-storm days per year in the continental USA). A Beverage antenna aimed out over the ocean at dawn knocks down domesticmediumwave and tropical bands frequencies to the east, leavingweak DX from Asia and the Pacific in the clear. So...try a torroid core to clamp down the noise from the Firebox. If your setup is like mine, theRFI is coming from the power cable.The "J" series Amidon core is one I've often used over the years for constructing impedance matching transformers, baluns, etc. 73, Guy Atkins Puyallup, WA -Original Message-From: Ross [mailto:[EMAIL PROTECTED]Sent: Sunday, January 08, 2006 8:09 PMTo: FlexRadio@flex-radio.bizSubject: [Flexradio] RF Noise from Presonus Firebox I am running with 2 computers, one driving the SDR1000 thru a presonus Firebox the other a normal soundcard to my FT1000MP. I had the computer with the SDR1000 turned off while changing sound cards around. Then switched it on and the noise level in the FT1000 on 20m increased significantly. Unplugging the cables from the computer controlling the SDR1000, the offending item is the cable going to the Presonus firebox. Has anyone noticed this problem, of RF from the Firewire connection, and importantly what is the best method to eliminate it.? Regards Ross ZL1WN
Re: [Flexradio] Windows Update
CAUTION. This update is ONLY for 2000 sp4. If you do not have sp4, do not install it. Bob Eric Ellison wrote: Cecil We will probably know tomorrow. I still have 10 to 15 2000 machines. WSUS pushes tonight, so I will know tomorrow. I’ve been struggling Friday and today with the results of the infection of one machine, it’s toast. (XP). Reports are that it will masquerade as any graphics format, jpg, wmf, bmp etc, and the exploits are increasing. It does not ‘spread’ fast at this point but if you get an infected graphic it will be nasty. As I say, I don’t post these things, and probably get 10 or so user a day sending hoaxes to me. I have not seen information on the 2000 crash. Eric -- AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman Laziness is the number one inspiration for ingenuity. Guilty as charged!
Re: [Flexradio] Windows Update
Bob Thanks SP-4 was mandatory in our environment about 2 years ago, it also has critical updates. Either way beware. Clever folks in the netherworld are exploiting it with graphics. Eric -Original Message- From: Robert McGwier [mailto:[EMAIL PROTECTED] Sent: Monday, January 09, 2006 9:05 PM To: Eric Ellison Cc: 'KD5NWA'; FlexRadio@flex-radio.biz; 'Xylo-SDR Discussion' Subject: Re: [Flexradio] Windows Update CAUTION. This update is ONLY for 2000 sp4. If you do not have sp4, do not install it. Bob Eric Ellison wrote: Cecil We will probably know tomorrow. I still have 10 to 15 2000 machines. WSUS pushes tonight, so I will know tomorrow. I've been struggling Friday and today with the results of the infection of one machine, it's toast. (XP). Reports are that it will masquerade as any graphics format, jpg, wmf, bmp etc, and the exploits are increasing. It does not 'spread' fast at this point but if you get an infected graphic it will be nasty. As I say, I don't post these things, and probably get 10 or so user a day sending hoaxes to me. I have not seen information on the 2000 crash. Eric -- AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman Laziness is the number one inspiration for ingenuity. Guilty as charged!
Re: [Flexradio] RF Noise from Presonus Firebox
Guy, Thanks for your email, its nice to know someone else has noticed a problem with the Presonus Firebox. Like you I tried earthing the Firebox, to no avail. Thanks for the tip about the toroid, I had one here, but it also is not the problem. It appears to be coming down the firewire cable. The noise is particularly obvious ( in fact very obvious) on my FT1000 which is just attached to a wire antenna. Remove the Firewire cable and the FT1000 is quiet, just normal rural atmospheric noise. So unless I can stop the noise from the Firewire somehow, the only answer may be totry theDelta 44 internal soundcard I have here.. Any suggestions gratefully accepted, as the presonus is a nice unit. Regards Ross Original Message - From: Guy Atkins To: Ross ; FlexRadio@flex-radio.biz Sent: Tuesday, January 10, 2006 2:44 PM Subject: RE: [Flexradio] RF Noise from Presonus Firebox Hi Ross, That was good timing of your inquiry about the Firebox noise! I just returned from a four-day DXpedition (chasing foreign MW and tropical bands) to the Washington coast, and encountered noise from my Firebox, too. This was my first serious use of my relatively-new SDR-1000 and I had not noticed any noise at my home location (fairly RF-quiet). However, in a DC-only DXpedition setting with zero noise other than atmospheric, any RFI is immediately noticed. I tracked down a pulsing, broadband hissing noise to the Firewire DC input, which is connected to my deep-cycle batteries via a distribution systemfeeding all other DC gear. With all other equipment turned off, I noticed no difference in the noise level when unplugging the I/O cables and the Firewire cable. The only thing remaining was radiation from the unit's case or power cable, or conduction via the power cable. I tried temporarily grounding the Firebox's metal case, without effect. I happened to have a Amidon FT-140-J torroid core (1.40" diameter)on hand, so I did a field mod of cramming as many turns of the DC cable through the torroid as would fit. The coaxial DC connector is attached less than an inch past the torroid. Voila... noise gone! The only noises remaining were very low-level spikes and buzzes here and there, visible on the panadapter. I tracked these down to RFI emanating from the Compaq X1000US laptop screen (noises change pitch and intensity when I touch myhand to the surrounding LCD cover, aluminum in the X1000 series). I don't know if the RFI is coming directly from the laptop(screen) casing, or going outthrough the various parallel USB cables. I've always thought this was a pretty quiet laptop, but the SDR-1000 shows up any little signal ina RF-quiet environment.In the future I'm going to experiment with RFI clamp-on ferrites on every cable. By the way, after calibrating the SDR-1000's level with a XG-1, the background noise with Beverage antenna attached was around-132 dBm at medium preamp setting, and -140 to -144 dBm at the high setting. Very impressive! These readings were just after local dawn at the coast, where noise levels canbe eerily low in mid-winters (WA State has the fewest T-storm days per year in the continental USA). A Beverage antenna aimed out over the ocean at dawn knocks down domesticmediumwave and tropical bands frequencies to the east, leavingweak DX from Asia and the Pacific in the clear. So...try a torroid core to clamp down the noise from the Firebox. If your setup is like mine, theRFI is coming from the power cable.The "J" series Amidon core is one I've often used over the years for constructing impedance matching transformers, baluns, etc. 73, Guy Atkins Puyallup, WA
Re: [Flexradio] RF Noise from Presonus Firebox
clear. So...try a torroid core to clamp down the noise from the Firebox. If your setup is like mine, theRFI is coming from the power cable.The "J" series Amidon core is one I've often used over the years for constructing impedance matching transformers, baluns, etc. 73, Guy Atkins Puyallup, WA __ NOD32 1.1357 (20060109) Information __This message was checked by NOD32 antivirus system.http://www.eset.com
