Re: [Flexradio] blown SDR-1000 final opamp
I have accidentially made all sorts of mismatching the output from my OPA2674 and never have blown it. Running audio with Ozy/Janus and more than 1W rf-output. Maybe the reason is that you have overdriven the audio input. Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pete Ferrand Sent: Wednesday, December 10, 2008 4:16 AM To: Ahti Aintila Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] blown SDR-1000 final opamp Ahti: Thank you for taking the time to reply. My radio has the OPA2674 and that is what it had originally. The issue is not one of a short circuit, but most probably one of dealing with a high impedance load which would send the voltage up beyond what the part can handle. At least that's what I'm guessing; I'm not sure of the correct troubleshooting procedure for this kind of fault. My hope was that someone has figured out how to make the circuit more robust but since yours was the only reply and there's no mention of it in the archives I suppose that hasn't happened. 73, -Pete WB2QLL Somers, WI -Original Message- From: Ahti Aintila [EMAIL PROTECTED] Sent: Dec 9, 2008 4:54 AM To: Pete Ferrand [EMAIL PROTECTED] Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] blown SDR-1000 final opamp Pete, The very old SDR-1000 units have OPA2677 as the final amplifier and cannot stand short circuit. The newer radios use OPA2674 that has internal short circuit protection. Anyhow, ask Flex people directly, they know better the difficulties with some of the first production units. 73, Ahti OH2RZ On 09/12/2008, Pete Ferrand [EMAIL PROTECTED] wrote: Some months ago I blew the final opamp in my 1W SDR-1000 whilst matching it to a linear. Wasn't happy about that but since I accidentally hooked up the attenuator resistors wrong I wasn't too surprised since the rig saw a very high impedance. Worked fine ever since. Unfortunately I'm less happy about blowing the amp this morning, about a half year after that first incident, whilst trying it on six meters for the first time. Without the linear which doesn't cover six. Just wanted to see if I could work a couple locals. As far as the MFJ-269 showed there was a perfect match into the ATU but when I increased the power beyond about a tenth of a watt output the opamp popped again. Besides the time and money aspect, the circuit board clearly can't take a lot of parts replacements. Has anyone figured out how better to protect this part? Or some better solution. This is a four stack including the rfe board, older version with nylon spacers. Thanks. -Pete WB2QLL Somers, WI ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
Re: [Flexradio] blown SDR-1000 final opamp
Hi Ahti, thanks for the information. I will have a look on my pcb-layout with respect to these guidelines. 73, Gerd DJ8AY -Original Message- From: Ahti Aintila [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 10, 2008 12:38 PM To: [EMAIL PROTECTED] Cc: Pete Ferrand; flexradio@flex-radio.biz Subject: Re: [Flexradio] blown SDR-1000 final opamp Gerd, I completely agree with you. Nevertheless, the following excerpt from the data sheet may help understanding the instability problems: DRIVING CAPACITIVE LOADS One of the most demanding and yet very common load conditions for an op amp is capacitive loading. Often, the capacitive load is the input of an analog-to-digital (A/D) converterçincluding additional external capacitance that may be recommended to improve the A/D converter linearity. A high-speed, high open-loop gain amplifier like the OPA2674 can be very susceptible to decreased stability and closed-loop response peaking when a capacitive load is placed directly on the output pin. When the amplifier open-loop output resistance is considered, this capacitive load introduces an additional pole in the signal path that can decrease the phase margin. Several external solutions to this problem have been suggested. When the primary considerations are frequency response flatness, pulse response fidelity, and/or distortion, the simplest and most effective solution is to isolate the capacitive load from the feedback loop by inserting a series isolation resistor between the amplifier output and the capacitive load. This does not eliminate the pole from the loop response, but rather shifts it and adds a zero at a higher frequency. The additional zero acts to cancel the phase lag from the capacitive load pole, thus increasing the phase margin and improving stability. The Typical Characteristics show the Recommended RS vs Capacitive Load and the resulting frequency response at the load. Parasitic capacitive loads greater than 2pF can begin to degrade the performance of the OPA2674. Long PC board traces, unmatched cables, and connections to multiple devices can easily cause this value to be exceeded. Always consider this effect carefully, and add the recommended series resistor as close as possible to the OPA2674 output pin (see the Board Layout Guidelines section). BOARD LAYOUT GUIDELINES Achieving optimum performance with a high-frequency amplifier like the OPA2674 requires careful attention to board layout parasitic and external component types. Recommendations that optimize performance include: a) Minimize parasitic capacitance to any AC ground for all of the signal I/O pins. Parasitic capacitance on the output and inverting input pins can cause instability; on the noninverting input, it can react with the source impedance to cause unintentional band limiting. To reduce unwanted capacitance, a window around the signal I/O pins should be opened in all of the ground and power planes around those pins. Otherwise, ground and power planes should be unbroken elsewhere on the board. 73, Ahti OH2RZ On 10/12/2008, Gerd Loch [EMAIL PROTECTED] wrote: I have accidentially made all sorts of mismatching the output from my OPA2674 and never have blown it. Running audio with Ozy/Janus and more than 1W rf-output. Maybe the reason is that you have overdriven the audio input. Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pete Ferrand Sent: Wednesday, December 10, 2008 4:16 AM To: Ahti Aintila Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] blown SDR-1000 final opamp Ahti: Thank you for taking the time to reply. My radio has the OPA2674 and that is what it had originally. The issue is not one of a short circuit, but most probably one of dealing with a high impedance load which would send the voltage up beyond what the part can handle. At least that's what I'm guessing; I'm not sure of the correct troubleshooting procedure for this kind of fault. My hope was that someone has figured out how to make the circuit more robust but since yours was the only reply and there's no mention of it in the archives I suppose that hasn't happened. 73, -Pete WB2QLL Somers, WI -Original Message- From: Ahti Aintila [EMAIL PROTECTED] Sent: Dec 9, 2008 4:54 AM To: Pete Ferrand [EMAIL PROTECTED] Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] blown SDR-1000 final opamp Pete, The very old SDR-1000 units have OPA2677 as the final amplifier and cannot stand short circuit. The newer radios use OPA2674 that has internal short circuit protection. Anyhow, ask Flex people directly, they know better the difficulties with some of the first production units. 73, Ahti OH2RZ On 09/12/2008, Pete Ferrand [EMAIL PROTECTED] wrote: Some months ago I blew the final opamp in my 1W SDR-1000 whilst matching it to a linear. Wasn't happy about that but since I accidentally hooked up the attenuator resistors wrong I
Re: [Flexradio] Remote Control Power On Flex 5000A
Mack, one possibiltity is: use a router or switch which is always connected to the mains and the network cable with the computer that is used with your SDR. Use a master/slave power panel where the computer is the master and your SDR one of the slaves. With Lanstart or a similar program you can power up the pc. When it is up you can remotely work with the pc (i.e. with ULTRA VNC VIEWER) and start remotely PowerSDR and control your SDR. After you have finished you have to powerdown your pc and pc as well as SDR are switched off and again your router or hub ist the only device which stays powered up and ready for a new Lanstart. Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Nance Sent: Friday, November 28, 2008 1:53 AM To: 'Mack'; flexradio@flex-radio.biz Subject: Re: [Flexradio] Remote Control Power On Flex 5000A Mack, I think I misunderstood what you wanted to do. What I told you would only turn PowerSDR off/on not the F5K itself. I don't think there is a way to do what you want. Sorry, my mistake. 73, Steve K5FR -Original Message- From: Steve Nance [mailto:[EMAIL PROTECTED] Sent: Thursday, November 27, 2008 5:35 PM To: 'Mack'; 'flexradio@flex-radio.biz' Subject: RE: [Flexradio] Remote Control Power On Flex 5000A Hi Mack, Yes, you can turn the power on/off By using a macro in DDUtil with the following commands. ZZPS1; = power on ZZPS0; = power off Here is a link that will explain how to use macros in DDUtil if your not familiar. http://k5fr.com/ddutilwiki/index.php?title=How_To#Setup_Macro_Commands Let me know if you need any assistance. 73, Steve K5FR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mack Sent: Thursday, November 27, 2008 12:20 PM To: flexradio@flex-radio.biz Subject: [Flexradio] Remote Control Power On Flex 5000A I've searched the KB and the reflector archives and not found the answer. Is there a way to remotely power on the Flex 5000A? That is, if I use an internet controlled power strip to turn on the AC power, which in turn powers on the 12 VDC power, is there a means to press the power button on the Flex 5000A via software? Of is there a means to have it default to power on when DC power is applied to the Flex 5000A. I use my Flex remotely when I travel on day trips but would like the ability to power it up and down remotely when I'm out of town on extended trips. 73, Mack de WB4MAK ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
Re: [Flexradio] SDR-1000 PowerSDR v1.12.1 with dedicated I/Q settings per each band
I believe that it has been pointed out that those people who are interested in multiband image compensation for the SDR1K do not expect an automated procedure but would do it manually. A signal for every band should be available for most of us. 73, Gerd DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dudley Hurry Sent: Tuesday, August 05, 2008 8:35 AM To: [EMAIL PROTECTED] Cc: FlexRadio biz Subject: Re: [Flexradio] SDR-1000 PowerSDR v1.12.1 with dedicated I/Q settings per each band Christos, Since the 1K does not have the ability to generate a signal to use as an image calibration marker, that you have the test gear there to do this? Which is lucky for you, but for those that don't, multi band image calibrations are not possible.. 73, Dudley WA5QPZ Christos wrote: I think that the cards are shuffled more than needed. I am very satisfied with my sdr1k box and its performance. Image rejection is the holy grail of any DC tranceiver. I am not interested in automatic image calibration since it always gave me poor results. I am also not interested in exotic built in test equipment and eeproms. I only want to be able to manualy store phase and gain numbers separately for each band on PowerSDR (setupdspimage reject tab), like I do now for a single band. Sorry that I can't make it any simpler than that. 73 de Christos (sv1fxo). ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.12/1590 - Release Date: 8/4/2008 8:09 AM No virus found in this outgoing message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.12/1590 - Release Date: 8/4/2008 8:09 AM ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
Re: [Flexradio] SDR-1000 PowerSDR v1.12.1 with dedicated I/Q settingsper each band
Hi Christos, thats a very good idea and I will test your software. However it would be the best idea if Flexradio would integrate it in PowerSDR. 73, Gerd DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Christos Nikolaou Sent: Monday, July 28, 2008 2:42 PM To: flexradio@flex-radio.biz Subject: [Flexradio] SDR-1000 PowerSDR v1.12.1 with dedicated I/Q settingsper each band Hi, Some time ago a friend of mine that has an SDR-1000 asked me how difficult is it to have specific image rejection settings per each band like the Flex-5000 has. After some code searching I came up with a solution to his request so separate settings of phase,gain on rx and tx per each band will be available to his SDR-1000. I do not knkow if this is of use to you, but I did send a post to the Flex guys here and did not got back a reply. Anyway, I have a svn already in Google Code so if someone wants it here is the installation file with the latest updates based on PowerSDR v1.12.1 - http://powersdr-iq.googlecode.com/files/PowerSDR%20Setup.msi Also the source of this build for examination if Flex coders want it is under Flex branch. Since this work has been done for one SDR-1000 user, I guess it is good for others to enjoy it freely too. 73 Christos SV1EIA -- Forwarded message -- From: Christos Nikolaou [EMAIL PROTECTED] Date: Fri, Jul 25, 2008 at 10:36 PM Subject: Re: PowerSDR v1.12.0 with dedicated I/Q settings per band To: flexradio@flex-radio.biz Of course that is for the SDR-1000 models! forgot to mention this. On Fri, Jul 25, 2008 at 10:26 PM, Christos Nikolaou [EMAIL PROTECTED] wrote: Hi, I have experimented with the 1.12.0 trunk and created a version that has dedicated phase/gain I/Q settings and image calibration specific for each band. Whenever you change band, the dials change too. Initialy all bands have 0 on all phase/gain dials and you have to adjust per each. On program exit all values are stored and remembered in PowerSDR.mdb. I've utilized the internal variables scheme of Flex-5000. Provided that you do have some usage for it or want it, how can I send you the source code? (VS2003 project) 73 Christos SV1EIA ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
Re: [Flexradio] Flex 5000 and 4 Metre Band
as far as I know PowerSDR stops at 65 MHz. Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charlie Morrison Sent: Wednesday, July 09, 2008 3:52 PM To: flexradio@flex-radio.biz Subject: [Flexradio] Flex 5000 and 4 Metre Band Hi Group Is it possible to make the flex tx/rx on the 4m band (70.00-70.5 MHZ) and if so is a firmware patch available for it?. The 4m band is now widely allocated throughout Europe and it would be nice to use it there Thanks Charlie GI4FUE ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
Re: [Flexradio] new to SDR-1000, computer-noise redux
the better solution: use a high quality psu instead of chinese scrap imports. Most of them have no mains filter at all. I have tested and can recommend brand Bequiet. They have specified FCC Class B and they hold it. Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, July 01, 2008 3:02 AM To: 'Carl Vangsness' Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] new to SDR-1000, computer-noise redux Thanks Carl. Someone else questioned the power supply as well so this sounds like a good direction to explore. Jacky KA4HRE -Original Message- From: Carl Vangsness [mailto:[EMAIL PROTECTED] I found that two Corcom 15 ET1 line filters in series with the AC power cord to the computer drastically reduced really terrible noise on 80 meters and 40 meters. Two in series in the AC line worked great. Carl WCØV ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
Re: [Flexradio] XG1
Hi Kerry, thats NOT normal. XG1 has only 1 fout at 7.040. Check your audio cables. Perhaps I or Q is missing. 73, Gerd DJ8AY -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von kerry brown Gesendet: Sonntag, 20. Januar 2008 14:37 An: Tim Ellison; NU8Z; flexradio@flex-radio.biz Betreff: [Flexradio] XG1 Hi Folks is there anybody that has used the XG1 for calibration. Should there be two signals, I am getting one on 7.040 and another on 7.062, is this normal. As there is two signals what one is right? Should I set the calibration from the 7.040 or the 7.02. When on 14mhz the radio seems to be 22kh out. Alas I cannot hear any wwv or any am stations are to wide. Hope anyone can help? or is it better to delete srd 1.10.3 and start again. It receives well but I do not think it is in frequency. Sorry folks what mode should I use with the XG1? Any Help G7EXO Thanks - Never miss a thing. Make Yahoo your homepage. ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
Re: [Flexradio] MAKE BACKING UP A HABIT
Hi, last week I have exercised imaging the disk of my notebook. After several tries I have a solution which needs not to take the disk out of your notebook: With Paragon or Acronis you can image a bootable disk via the usb-port. You only need a case for a usb-disk for a few bucks and start the imaging after booting from the Paragon or Acronis Recovery CD, which loads unix or linux on your notebook. Gerd DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of K3PZ Sent: Wednesday, December 19, 2007 3:55 AM To: Flex Reflector Subject: [Flexradio] MAKE BACKING UP A HABIT Being in the computer business, I have an ICS Image Masster hard drive duplicator. Every week or so I will take the hard drive out of my desktop PC (my Flex PC) and my main laptop (business)and connect each drive up to my duplicator and make an exact copy of each drive. I label the backup drives and then put them back on the shelf in case of an emergency. If either of my installed drives ever crapped out permanently, I could take my backup, install it in my PC or laptop and boot right back up (to the date of my last backup of course) and resume business. Not backing up is rolling the dice. The dealer usually wins! 73 de Paul Zora K3PZ Port Saint Lucie, FL www.k3pz.com -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20 071218/46cfcb3e/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
[Flexradio] DC-Hump with SDR1000
I am using the SDR1000 with Janus/Ozy and have minor problems with the hump: The hump is normally not visible. It is mainly visible when switching to a different band for a short time and decreases within 1-3 sec below the noise floor. This looks like a capacitive charging/discharging or a loop regulation effect. As far as I can remember this behaviour was similar with the D44 soundcard I used before. Only on 6m I have an always visible hump. Are there ideas on the mechanism and do other users see the same behaviour? Gerd DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gerald Youngblood Sent: Tuesday, October 23, 2007 3:22 AM To: 'Roland Etienne'; 'Rob Moore'; flexradio@flex-radio.biz Subject: Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21 Rob, Let me confirm Roland's statement that the DC hump has nothing to do with the SDR-1000 and everything to do with the sound card. Better cards have lower DC offset and/or noise. The FLEX-5000 does not have this hump because it uses a built in high performance A/D converter (i.e. no hump). Janus/Ozy offers the best performance for SDR-1000 use. 73, Gerald Gerald Youngblood, K5SDR FlexRadio Systems Ph: 512-535-4713 Fax: 512-233-5143 Email: [EMAIL PROTECTED] Web: www.flex-radio.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roland Etienne Sent: Monday, October 22, 2007 1:50 AM To: 'Rob Moore'; flexradio@flex-radio.biz Subject: Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21 -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Rob Moore Envoyé : dimanche 21 octobre 2007 23:58 À : flexradio@flex-radio.biz Objet : Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21 Rob, I have an SDR-100 as well which I use primarily for SWL'ing. I've been aggravated by the DC Hump as well and like you am wondering what can be done about it. I also have an SDR-IQ which isn't quite as sensitive as the SDR-1000 but works quite well and has no sign on the hump. I know that the SDR-IQ doesn't use a sound card and instead has the I_Q demodulator and decimator on board so perhaps that's why it doesn't have any hump, but it seems like this is a design defect with t he SDR-1000 that could be solved with a little effort. Rob (coincidence!) SDR-IQ and SDR-1000 are completely different designs, the SDR-IQ have the ADC on HF, there is no mixing process. For information, SDR-1000 with janus-Ozy gives an unnoticeable hump... 73, Roland f8chk. ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Strange Janus effect
I confirmed this behaviour before but never heard any comments. Had not the time to make any investigations. I tried to reproduce this effect last night with svn1644 and could not hear it but it was just a quick test and maybe not representative. Gerd DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of a.groff Sent: Thursday, October 11, 2007 6:47 PM To: [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: [Flexradio] Strange Janus effect On Aug 30 I posted to the HPSDR mailing list - Subject: [hpsdr] Strange Janus effect... * High Performance Software Defined Radio Discussion List * I am noticing a strange cross-talk ( ?? ) effect with Janus ( OZY ? ) when used with SDR-1000 PowerSDR (v1.9.1 svn 1354, v1.10.2 ) that I do not notice with the D44 sound card... I notice this effect in the receive audio when I start to decrease the AGC-T ( RF Gain ) control in Power SDR. As the received signal starts to disappear from audibility, it is replaced by very distorted replica at a reduced amplitude. The effect was first observed in SSB modes but is also present it AM mode ( maybe more so. ) Does you one else have this effect or do I have a problem with my Janus/Ozy/system ?? How would I start to isolate the problem? AL, K0VM - I received a couple of affirmative response and no don't see it here's. I have uploaded spectrum analyze screen shots of the speaker/head phone audio that further demonstrate the problem.. ( SDR-1000 w/PwrSRD 1.10.3) The first screen shot *http://www.hamsdr.com/dnld.aspx?id=676 *is with the D44 sound ( preamp off, antenna connected to dummy load AGC-T = 120). Note noise floor above 3khz. The second screen shot *http://www.hamsdr.com/dnld.aspx?id=677 *is with the Janus sound card and AGC-T=120. Note elevated noise floor above 3khz. The third screen shot *http://www.hamsdr.com/dnld.aspx?id=678* is Janus with AGC-T=100. Note again noise floor above 3khz compared to AGC-T=120. The fourth screen shot *http://www.hamsdr.com/dnld.aspx?id=679 *is Janus with AGC-T=70. Note noise floor through entire audio range. With the D44 sound card, the noise floor about 3khz is consistently flat with all AGC-T settings. My first guess was that this may be a Ozy/Janus hardware problem but to the best of my knowledge, AGC-T only operated on software, which suggests to me that some kind of cross talk problem in the software specific to Ozy/Janus. I would be happy to isolate this with further testing if someone can suggest what to look for ?? filesize: 43,021 Downloads: 0 *http://www.hamsdr.com/dnld.aspx?id= filesize: 43,021 Downloads: 0 http://www.hamsdr.com/dnld.aspx?id=672* filesize: 43,021 Downloads: 0 *http://www.hamsdr.com/dnld.aspx?id=672* *672* ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Noise on Changing Frequency above 20M Band
Hi, maybe you have a noise generating optical mouse. I experienced noise problems with an optical mouse. I tried a different one and the noise was gone. 73 Gerd, DJ8AY ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Samlex 1223 for Flex5000a?
Ruben, I found it in Germany: http://www.thiecom.de/samlex-sec1235.html 73 Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ruben Navarro Huedo Sent: Monday, August 20, 2007 10:59 PM To: Ray Andrews, K9DUR Cc: 'FlexRadio List' Subject: Re: [Flexradio] Samlex 1223 for Flex5000a? Ray Andrews, K9DUR escribió: Charles, Wow! The Diamond GZV4000 looks like a really great P/S, especially for that price! I guess it all boils down to the 1st piece of equipment that you find that meets your requirements is reasonably priced becomes the best one for you. Everyone has their own best. I like my Alinco's, but if I had found the Diamond 1st, I probably would have 3 of them instead. Of course, I bought my 1st DM-330MV before the dollar tanked vs. the Yen only paid $110 for ithi..hi. 73, Ray, K9DUR thank's a lot all for your answer. I tested some time ago this Diamond ps, but i prefer buy another one. We had some problems with it. I have been trying find Astron PS in Europe and is very dificult. Will try find a Samlex 1235 ... 1223 has been great for me. -- Ruben Navarro Huedo http://www.palotes.com http://www.cabodesantapola.org ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] 1434 up
just curious: what is a brewski? sounds like a beer label? 73 Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert McGwier Sent: Tuesday, August 14, 2007 7:31 PM To: Flex Radio Cc: [EMAIL PROTECTED]; joe levy Subject: [Flexradio] 1434 up 1434 is up with the 2 port sound card restored. This is my haste and not Flex policy. Thanks to Phil Covington and Joe Levy for pointing out the error of my ways. Imagine poor John's consternation the next time a patented W5GI booth demo blew up in his face. This will also restore operation for those using older sound cards with softrock's. The CPU percentage being halved from the previous full duplex capable version should be a boon to all. My apologies to all. Joe and Phil, I owe you a brewski. Bob N4HY -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair If you're going to be crazy, you have to get paid for it or else you're going to be locked up. Hunter S. Thompson ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] brewski
thanks for all comments. I will try it tonight. 73 Gerd You nailed it: http://dictionary.reference.com/browse/brewski Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Gerd Loch Sent: Wednesday, August 15, 2007 2:03 AM To: 'Robert McGwier'; 'Flex Radio' Cc: [EMAIL PROTECTED]; 'joe levy' Subject: Re: [Flexradio] 1434 up just curious: what is a brewski? sounds like a beer label? 73 Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert McGwier Sent: Tuesday, August 14, 2007 7:31 PM To: Flex Radio Cc: [EMAIL PROTECTED]; joe levy Subject: [Flexradio] 1434 up 1434 is up with the 2 port sound card restored. This is my haste and not Flex policy. Thanks to Phil Covington and Joe Levy for pointing out the error of my ways. Imagine poor John's consternation the next time a patented W5GI booth demo blew up in his face. This will also restore operation for those using older sound cards with softrock's. The CPU percentage being halved from the previous full duplex capable version should be a boon to all. My apologies to all. Joe and Phil, I owe you a brewski. Bob N4HY -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair If you're going to be crazy, you have to get paid for it or else you're going to be locked up. Hunter S. Thompson ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] A/J/O + 100 watt SDR 1K
Hi Bill, but please implement only a warning as receive and transmit wo 100W PA should still work. 73 Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Tracey Sent: Tuesday, August 14, 2007 6:58 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: Re: [Flexradio] A/J/O + 100 watt SDR 1K Well I just looked at the code and the amplifier ADC is definitely not being read via OJ ... it in fact is being read directly from the parallel port which would seem to me that you'd get back garbage data since presumably there's nothing connected to the parallel port. If you want to confirm the code is in the path I think it is, run PowerSDR from the command line with stdout and stderr redirected to a file: PowerSDR 21 runlog.txt And look at the contents of runlog.txt after running -- if the code is were I think it is you'll see some messages like: warning - Ozy ADC read not implemented!! Next time I'm in there changing code I will change it to explicitly fail if you try and read the ADC via OJ -- this will be temporary until I've gotten the read ADC code written, something I hope to get to soon as I've now installed the 100 watt amp in my SDR 1000. Regards, Bill (kd5tfd) At 02:46 PM 8/13/2007, [EMAIL PROTECTED] wrote: -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of [EMAIL PROTECTED] Sent: Monday, August 13, 2007 3:10 PM To: flexradio@flex-radio.biz; [EMAIL PROTECTED] Subject: Re: [Flexradio] A/J/O + 100 watt SDR 1K I'm confused! That makes two of us ! I have been running AJOFlex since day one and all versions (1.6, 1.9, 1.91) read my forward and reverse powers and display the powers correctly as well as calculating/displaying the SWR on PowerSDR. My only connection to the PC is via USB. I must admit, I'd only assumed that the power levels being reported were correct - when everything appears to work there doesn't seem to be a reason to go looking for problems. If, as Bill indicates, that the firmware is incomplete, then it must be a first in the history of computers that it works and appears to work well ! I'd have expected to see some smoke by now ;) I'm really curious to hear what the dickens it is doing with the current state of the firmware and also if there was some documentation I missed during initial setup that would have advised against using the USB control option if the 100w PA is present - I've got to believe that most of the SDR-1Ks connected to A/J/O are NOT the 1w variety. Pete, N3EVL ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] A/J/O + 100 watt SDR 1K
Hi Bill, besides the fact that the A/D-values from the pa are not read with J/O you need only 1 usb-cable between computer and SDR. That is the main reason for me to use J/O with the SDR1000. Therefore I can use the parallel port for my printer again. 73 Gerd -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, August 14, 2007 1:13 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: Re: [Flexradio] A/J/O + 100 watt SDR 1K Bill, Thanks for the update. I've never used the parallel port on my PC to talk to the SDR - even when I was using the Delta 44 card, I was using the USB-parallel option. I actually have a printer plugged in to the parallel port - maybe PowerSDR is reading that for the power levels! It still amazes me that this appears to fail so gracefully. In my experience when those pesky 1s and 0s are left to themselves, they tend to naughtiness ;) Question: is it possible to use A/J/O in soundcard-only mode and control the SDR via the USB-Parallel option or do I have to use the parallel port? (I can always move the printer off the parallel port to a usb port if necessary since it talks either way). -Original Message- From: Bill Tracey [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 14, 2007 12:58 AM To: Thompson, Peter; [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: RE: [Flexradio] A/J/O + 100 watt SDR 1K Well I just looked at the code and the amplifier ADC is definitely not being read via OJ ... it in fact is being read directly from the parallel port which would seem to me that you'd get back garbage data since presumably there's nothing connected to the parallel port. If you want to confirm the code is in the path I think it is, run PowerSDR from the command line with stdout and stderr redirected to a file: PowerSDR 21 runlog.txt And look at the contents of runlog.txt after running -- if the code is were I think it is you'll see some messages like: warning - Ozy ADC read not implemented!! Next time I'm in there changing code I will change it to explicitly fail if you try and read the ADC via OJ -- this will be temporary until I've gotten the read ADC code written, something I hope to get to soon as I've now installed the 100 watt amp in my SDR 1000. Regards, Bill (kd5tfd) At 02:46 PM 8/13/2007, [EMAIL PROTECTED] wrote: -Original Message- From: [EMAIL PROTECTED] [mailto:flexradio- [EMAIL PROTECTED] radio.biz] On Behalf Of [EMAIL PROTECTED] Sent: Monday, August 13, 2007 3:10 PM To: flexradio@flex-radio.biz; [EMAIL PROTECTED] Subject: Re: [Flexradio] A/J/O + 100 watt SDR 1K I'm confused! That makes two of us ! I have been running AJOFlex since day one and all versions (1.6, 1.9, 1.91) read my forward and reverse powers and display the powers correctly as well as calculating/displaying the SWR on PowerSDR. My only connection to the PC is via USB. I must admit, I'd only assumed that the power levels being reported were correct - when everything appears to work there doesn't seem to be a reason to go looking for problems. If, as Bill indicates, that the firmware is incomplete, then it must be a first in the history of computers that it works and appears to work well ! I'd have expected to see some smoke by now ;) I'm really curious to hear what the dickens it is doing with the current state of the firmware and also if there was some documentation I missed during initial setup that would have advised against using the USB control option if the 100w PA is present - I've got to believe that most of the SDR-1Ks connected to A/J/O are NOT the 1w variety. Pete, N3EVL ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] SVN 1424
Hi Bob, I have updated to SVN 1424 w.o. any problems. CPU usage with J/O/SDR1000 is now about 20-30% lower with 19200 Hz sampling rate. I just wanted to give you another confirmation of good work! 73 Gerd DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert McGwier Sent: Monday, August 13, 2007 12:59 AM To: Flex Radio Subject: [Flexradio] Thanks everyone Thanks everyone for the good reports. I think we get the picture that this is a winner. I would suggest we swap modes now and rather than tell everyone that it is good, please tell Eric and I if you have problems. I really do appreciate the rapid reports as they made me feel much better about sticking my neck out on this one. We have come a long, long way from the early days. This is really pretty cool. 73's and enjoy Bob N4HY -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair If you're going to be crazy, you have to get paid for it or else you're going to be locked up. Hunter S. Thompson ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] svn numbers - manual frequency calibration
Hi, I can no more find the manual frequency calibration with the last svn's? Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eric Wachsmann Sent: Wednesday, August 08, 2007 11:42 PM To: 'FireBrick'; 'FlexRadio List' Subject: Re: [Flexradio] svn numbers I'll fix that here shortly. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of FireBrick Sent: Wednesday, August 08, 2007 4:32 PM To: FlexRadio List Subject: [Flexradio] svn numbers I just right clicked and got the new svn Which Tortoise says is svn 1412... I told my kids that I was 'leader and ahead of my time' Becuase when I started PWSDR it says Beta v1.9.1 SVN:1413 In the window header... LOL ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Where do these spectrum humps come from ?
Hi Jan, as I stated earlier, psu are often without mainsfilter and will radiate a lot of noise. At least you will have to select a psu which is specified to meet FCC Class B. Most suppliers do not specify anything around EMI. I also made negative experiences with TFT-monitors (I had to install an additional mainsfilter to get rid of most of the noise) and even with optcal mouses and keyboards. When you have optmized all these components, then you still will have spikes from the DDS and you can mostly shift them out of your passband by activating the Spur Reduction but they will appear somewhere else and they can even be more. Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of jan Sent: Tuesday, July 17, 2007 7:16 PM To: flexradio@flex-radio.biz Subject: Re: [Flexradio] Where do these spectrum humps come from ? My power supply is a switched one ... This afternoon I borrowed a normal PS and the spectrum looks a lot cleaner ... a few spikes here and there Have a look on that page again, there's a picture of how it looks now ... Is this normal ? with those spikes still there ? When pressing the SR button I get even more spikes ??? One thing that I also noticed is that the 11 kHz signal moves up and dow a lot when I touch the audio output of the sdr. Also tried some ferrite clamps, but the didn't seem to help. 73 Jan. Jan: On the worst day I have ever had while using the worst sound card I ever owned, my SDR-1000 spectrum never looked that bad connected to a dummy load. There is something wrong someplace. What kind of power supply are you using? Do you have another receiver that you may tune to 14,200 and see if you hear those signals? This is definitely not normal. Bob N4HY jan wrote: Hi, I've been using my sdr1000 for a few months now, but I can't seem to get rid of some humps in the spectrum. I've read that the 11khz signal is normal, but I also get some other big humps. They occur when I connect my output audio from the sdr into the breakoutbox of the delta 66. I've tried a ground loop isolator and this gives me a spectrum that is a bit cleaner. What else can I do ? You can see a a picture of the spectrum on www.on6zg.be/sdr.html This is with the sdr connected to a 50 ohm dummy load. best regards Jan, ON6ZG ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] 6 Meters
Hi Bob and Mike, thanks for your help. I will try to call them. However it is a little strange that they do not have an email address. For German (and other overseas) customers it is important to know the shipping costs as they can easily be equivalent or higher than the value of the ordered equipment. Gerd, DJ8AY -Original Message- From: Bob McGwier [mailto:[EMAIL PROTECTED] Sent: Monday, July 16, 2007 5:20 PM To: [EMAIL PROTECTED] Cc: 'Dave Nancy Ridge'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] 6 Meters Gerd: They just reopened for business in Florida. They like telephone orders or web orders. Call them, Sandra will help you. 73's Bob N4HY Gerd Loch wrote: Hi, I tried to get informations on the int. shipping costs from DownEast on their webpages but it seems impossible to get it and I also could not find an emailaddress. Can someone help? Gerd, DJ8AY -- Robert W. McGwier, Ph.D. Center for Communications Research 805 Bunn Drive Princeton, NJ 08540 (609)-924-4600 (sig required by employer) ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] 6 Meters
Hi, I tried to get informations on the int. shipping costs from DownEast on their webpages but it seems impossible to get it and I also could not find an emailaddress. Can someone help? Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Nancy Ridge Sent: Sunday, July 15, 2007 7:58 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] 6 Meters Burch, Get a $65 DownEast, or an AR2 or a LNA 6 meter preamp. All under $100. I have tried them all. It will bring your SDR1000 receiver up with the best rigs and better! I use a TE Systems amp .5watt to 170 watts, (only need 50 watts) and a ACOM1000 to get 1k+ output. All antenna relaying is done external to the SDR. 73, Dave W9DR -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20 070715/755dc7ad/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] 6 meters
I can not confirm that the SDR1000 is dead as a post with many birdies. I have only few birdies and heard a lot of stations during the weekend when the band was open. Bit I did not really measure the sensitivity on 6m. Has anyone measured the sensitivity on 6m with the SDR1000? Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert McGwier Sent: Saturday, June 23, 2007 1:09 AM To: Phil LaMarche Cc: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] 6 meters It is addressed. I have 100 watts output and good sensitivity on 6m. Any spurs that are there are very tiny. On receive these are to be addressed in an early release of the software by using the track and subtract algorithm that is in use in Linrad. On transmit, they are so far below the legal IMD products they are not an issue. Bob N4HY Phil LaMarche wrote: The receive on the SDR1000 is dead as a post with many birdies etc. Was this addressed with the 5000? Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com http://www.instantgourmetspices.com/ www.W9DVM.com http://www.w9dvm.com/ 727-944-3226 800-395-7795 pin 02 FAX 727-937-8834 NASFT # 30210 W9DVM ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair If you're going to be crazy, you have to get paid for it or else you're going to be locked up. Hunter S. Thompson ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Interesting noise
Maybe this is one of thousands of switching psu in your or the neighbours house... 73 Gerd -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Mark Amos Gesendet: Montag, 28. Mai 2007 14:03 An: 'flexradio' Betreff: [Flexradio] Interesting noise Folks, I have seen some unusual noises on the panadapter again this morning and wondered if anyone else has seen this. I've seen this before, usually in the morning, as I recall. I'm just wondering if they are a local noise (either in the shack or nearby) or if other people have seen them. Here's a description: Noise floor (today at about -120) drops a couple of DB's A blob of noise comes up from the floor and spreads symmetrically, sometimes dissipating as it goes, other times stopping at a certain width and hanging there for a few seconds. This process takes a few seconds. The pattern recurs in intervals of 10 to 20 seconds for a half-dozen repetitions then stops for an indeterminate period before coming back. It can go on for some time, but eventually subsides. I've got a couple of AVI movies of a portion of the panadapter when this is happening and an I/Q recording of the phenomenon if anyone would like to see it. Anyway, just interested to know if anyone else has seen this interesting noise pattern and thoughts on what it is. Mark ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] New Computer Power Supply
Hi, I have made a lot of experience with psu and noise. Quite a lot of psu's for pc have no mainsfilter at all. Chinese manufacturers save a few cent and for most people the psu is ok. When you start to ask sellers for the specification they will tell you how many watts they offer but no idea about EMI. You have to ask the manufacturer wether they guarantee to be within FCC Klass2. Only when you get a positive written confirmation you can hope to get a quiet psu. But beside the psu you also can get noise from the graphic cards and from the vga-cable and the display and even from keyboards and from optical mouses. Here on the German market I have exercised the procedure with psu's from BEQUIET and made good experience. I still have trouble with the 19 LCD-Display. It was a desaster at the beginning and I inserted a good mainsfilter and still have noise on 15m. Good luck! Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of W5CUL Sent: Wednesday, May 02, 2007 5:11 AM To: 'John Denson' Cc: 'FlexRadio Reflector' Subject: Re: [Flexradio] New Computer Power Supply John, I just replaced my defunct power supply a few weeks ago with an Antec Smartpower 2.0 SP-500 ATX12V 500W Power Supply, and I have no RFI issues. Here is a hyper link: http://www.newegg.com/Product/Product.aspx?Item=N82E16817103937 Also, I swore my son's computer was an engineered EMI/RFI generator!! I could tell when it was turned on just by the noise floor on the Flex, it would rise 6 - 10db. Since then I upgraded his computer case to an Antec Lifestyle SONATA II due to space issues with his new desk. That particular case uses the Antec Smartpower 2.0 SP-450 ATX12V 450W Power Supply. Once I migrated all of the hardware to the new case, I fired up the Flex, crossed my fingers, and told my son to turn on his computer. I was relieved in that I did not see the noise floor move 1db. So for what it's worth, at least my experiences with Antec Power Supplies have been very good. Good luck with your project. 73, Mike W5CUL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Denson Sent: Tuesday, May 01, 2007 6:13 PM To: FlexRadio Reflector Subject: [Flexradio] New Computer Power Supply I am building a new desktop computer for my SDR-1000. The old 1 GHz Pentium III just can't keep up any more. The new system will be an Intel Core 2 Duo running at 2.13 GHz with 2G of RAM, one SATA hard drive, one IDE hard drive, one DVD/CD drive, a dual display video card and the Delta-44 sound card. My two questions are as follows: What size power supply should I use, and Who makes RF quiet power supplies? John Denson, AI6A -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20 070501/6af004f2/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Panadapter hump
Hi, I never saw a hump like this for all versions of PowerSDR. I would not be willing to accept a hump like this! Running 1 W version with Delta44 in a small tower and I am not using any isolation transformers. I only see a narrow peak when swichting the band or changing frequency (probably when a loop is working?) for about 1 sec. or so. Then the peak is disappearing or almost disappearing in the noise floor. I see the peak most on the higher bands (6m). Wonder which experiences other users have. Gerd DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Craig Monsen Sent: Thursday, April 19, 2007 3:15 AM To: FlexRadio Reflector Subject: [Flexradio] Panadapter hump Although I have not been able to get the alpha SDR-X software setup to run with my Extigy-USB card, I at least can share an observation that I think is important to acknowledge. It appears that much of the spectrum hump on the panadapter has been attenuated through modifications in the code. This hump for me tends to increase with increasing DDS frequencies, and gets ugly on 6 meters, especially with the pre-amp setting on high. At times the sound card is overwhelmed with a feedback loop that occurs with the hump and the AGC action. This problem appears to have been significantly improved upon by the software changes in the alpha branch. I have posted a couple of frames from PowerSDR and SDR-X to illustrate the difference. http://forums.flex-radio.com/Topic261-47-1.aspx Now all I can hope is that the software gurus will figure a way to support this greatly improved software with my archaic soundcard setup. 73 Craig KC2LFI -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20 070418/83a98fdd/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Q23. Regarding the FLEX-5000, can we assume ...
I would like to emphasize this demand Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Philip Covington Sent: Thursday, April 12, 2007 5:11 PM To: Flexradio Subject: [Flexradio] Q23. Regarding the FLEX-5000, can we assume ... Re: Q23 Could someone from Flex please give a general overview of the hardware design changes in the SDR-5000 from the SDR-1000 design? I think that some may get the wrong impression that the SDR-5000 is just a SDR-1000 with an integrated $1000-level sound card. I realize the hardware design is proprietary, but a general description of the improvements (DDS, I/Q balance, QSD and post amps, etc...) would go far to help potential customers justify the large increase in price between the SDR-1000 and the SDR-5000 radios. Phil N8VB ___ FlexRadio mailing list [EMAIL PROTECTED] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ ___ FlexRadio mailing list [EMAIL PROTECTED] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] gain setting?
Hi Ken, K2 is actuated when switching the sensitivity: Medium and High, Low and Off. with RFE: in LOW and OFF there is no Resistor (or the cutoff resistor) across the INA163 and the gain is 0dB or 1. In the Medium and High position the Gain-Set-Resistor is 316 Ohms resulting in a gain of about 26dB. without RFE: the high-gain resistor is 60,4 Ohms and the gain is about 40dB. K2 is switching reversed with gain setting on the console. 73 Gerd, DJ8AY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Klein Sent: Wednesday, April 04, 2007 3:56 AM To: flexradio@flex-radio.biz Subject: [Flexradio] gain setting? Can anyone please tell me how relay K2 is actuated and when? I can see it sets the gain of the INA163's, but don't understand what effect this has on the overall operation of the receiver. The values of R20 and R5 aren't marked on the schematics, so I can't figure out how much gain the INA163's actually provide, if any. Can someone enlighten me? Thanks, Ken WR5H -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20 070403/812ccb32/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Lowpass and Bandpassfilters - Addressing
Where in the sw are the edge-frequencies for switching the lowpassfilters LPF0 to LPF9 on the RFE-board and the bandpassfilters on the BPF-Board defined and addressed? How can the not assembled AUX-filters be defined ? Gerd - dj8ay -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070207/6f11b879/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] spam: Spur on AM
John, I do not know anything about transmit spurs. But I never saw the peak on the panorama 11 kHz down as long as I was using the Audigy 2ZS. The spur came with changing to Delta 44. I will investigate what the reason is and probably provide optocouplers in the input and output-lines. Gerd, dj8ay -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of K6JEK Sent: Tuesday, January 23, 2007 12:53 AM To: FlexRadio Reflector Subject: Re: [Flexradio] spam: Spur on AM Does the SDR-1000 transmit spurs on AM with all sound cards? I haven't had any complaints with my PreSonus but then again, I haven't gone looking. Jon, K6JEK ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Missing Selectivity ?
Hi Folks, everything seems to be perfect with my SDR besides that I am missing selectivity in CW mode. I can hear signals over a frequency range of about 2 kHz when the bandwith is set to 50 Hz. I have changed sw from 1.6.3 to 1.8.0 and the audio interface from Audigy 2 ZS to D44 at the same time and remember to have heard better selectivity before. Any suggestions what could be wrong? Gerd - DJ8AY -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20061231/b37e22db/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
[Flexradio] Noise from the PC
Hello, I have a lot of problems with noise emitted from the pc: -from missing or unsufficient mains filter -from tft-displays -even from the keyboard cable I wonder if nobody has such problems ? Gerd - DJ8AY ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
