Re: [Flexradio] PA distortion...
A small piece of information: Astron came out with a fix for their power supplies years ago that placed a disc capacitor, a 0.1 uf capacitor I believe, directly across the + and - output terminals of the supply for the specific purpose of suppressing RF on the the power lines. -- From: "Brian Lloyd" <[EMAIL PROTECTED]> Sent: Friday, July 11, 2008 9:52 PM To: "Mike Schlamp" <[EMAIL PROTECTED]> Cc: ; "'Al'" <[EMAIL PROTECTED]> Subject: Re: [Flexradio] PA distortion... > > On Jul 11, 2008, at 10:53 AM, Mike Schlamp wrote: > >> I noticed in the test setup announced earlier this morning that an >> RS35M was going to be the power source set for 14.3Vdc. Considering >> that some have commented on their Astron's actually being set to >> produce ~13.8Vdc, would it be beneficial, or at least another real >> world data point to try the IMD test with the power supply set for >> 13.8Vdc? Just a thought. > > Here is another thought. RF getting into the feedback loop in the > voltage regulator of the power supply can modulate the power supply > output too. I had a situation where RF-in-the-shack modulated the DC > supply voltage. > > -- > > 73 de Brian, WB6RQN > Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT 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/ > ___ 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] Time for an upgrade!
I spent a lot of time looking around for information on DPC's. I found interesting information at the Roland Cakewalk forums (www.cakewalk.com). Someone asked what BIOS I was using on my EX38-DQ6 board. It is a beta BIOS number F3B and it is not listed on the Gigabyte download website. It has to be requested by Email. Someone asked if I could recommend a motherboard. I don't think I'll be using any more Gigabyte boards. So far the Abit IX38 board is working well with Vista for photo and video editing. I have used ASUS boards before with good success. I hear that many Intel boards are good. At this point I don't feel comfortable recommending a specific board. I do believe that research relating to DPCs on motherboards is very important, prior to purchase. -- From: "Dale Boresz" <[EMAIL PROTECTED]> Sent: Friday, July 11, 2008 6:12 PM To: "Mark Ericksen" <[EMAIL PROTECTED]> Subject: Re: [Flexradio] Time for an upgrade! > Hello Mark, > > Thanks for sharing this interesting information. Do you have a good > resource for motherboard reviews that address effectiveness of DPC > handling? > > 73, Dale > WA8SRA > > > > Mark Ericksen wrote: >> I built two machines recently, one for my ham radio work, which includes >> connection to my Flex 5000, and one for photo and video editing (I take a >> lot of pictures and videos of my granddaughter). In both machines I >> used the Intel Core 2 Duo E8400 CPU. My photo and video machine runs >> Vista with 4GB of memory installed on an Abit IX38 motherboard, and my >> ham radio machine runs Windows XP with 2 GB of Memory installed on a >> Gigabyte EX38-DQ6. I have been building machines for years, but I >> learned a few things from this effort that I am willing to share. >> >> * Before selecting a motherboard do some research on the Internet paying >> close attention to how well a motherboard performs handling Deferred >> Procedure Calls. My Gigabyte board has issues with DPC's as verified by >> my Internet research that occurred after I purchased the board, >> unfortunately. If the motherboard has poor performance handling DPC's >> then it is possible that PowerSDR may freeze during operation. My >> Gigabyte motherboard is currently running a beta BIOS to correct its DPC >> issues. I had issues with PowerSDR freezing prior to this update. >> >> * Vista may work with PowerSDR but I have found that in general Windows >> XP does a better job in handling DPC's and therefore working with >> PowerSDR. I tried using both Vista and XP with PowerSDR and I got better >> results with XP. >> >> * Use good quality computer cables on all connections with ferrite >> beads. >> >> * Use a good quality power supply. >> >> -- >> From: "Jim Menefee" <[EMAIL PROTECTED]> >> Sent: Thursday, July 10, 2008 5:04 PM >> To: >> Subject: [Flexradio] Time for an upgrade! >> >> >>> Time to change the CPU and Mother Board. I have both a SRD 1000 and >>> 5000. I >>> run a lot of stuff in the background for biz (CS4-Dreamweaver, etc) and >>> use >>> 4 monitors. I have been eyeing the 6600 CPU's for $189.00 from Tiger >>> Direct. I would love to hear from others if this is the way to go and a >>> suggestion of a good Mother Board to go with it. Also, what is the SDR >>> software designed or best suited for - Duel - Quad, etc? >>> -- >>> ___ >>> 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/ >> >> >> > ___ 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] PA distortion...
On Jul 11, 2008, at 10:53 AM, Mike Schlamp wrote: > I noticed in the test setup announced earlier this morning that an > RS35M was going to be the power source set for 14.3Vdc. Considering > that some have commented on their Astron's actually being set to > produce ~13.8Vdc, would it be beneficial, or at least another real > world data point to try the IMD test with the power supply set for > 13.8Vdc? Just a thought. Here is another thought. RF getting into the feedback loop in the voltage regulator of the power supply can modulate the power supply output too. I had a situation where RF-in-the-shack modulated the DC supply voltage. -- 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT 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/
[Flexradio] flexradio off-topic interesting gadget
I hope you will forgive me for the off topic info.. I am mostly a silent observer to this list. Several times now, really good info on semi- related things has been of great value to me. I hope I am returning the favor... I have no ties to the mfr at all, just think this product has some interesting applications. Many time I have wanted to make measurements over time without running wires. This looks like a solution for some of them: http://www.dataq.com/products/hardware/easylog-data-logger.html?source=massmail 73, Fred WA8KCW ___ 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] Just how much DC Power Supply sag is acceptable?
If your going to run those tests how about biasing to class A and measure What the heck you might as well blow the competition completely out of the water while your at it. 73 W9OY ___ 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] TX Audio Quality Help, please!
At 02:07 PM 7/11/2008, Gerald Youngblood wrote: >The finals have two 470 uF caps in paralles (940 uF) right at the PA RF >chokes and another 470 uF at the driver for a total of 1410 uF on the 13.8V >bus. That does not count a string of 0.1 uF caps in parallel. > >Gerald 1000 uF isn't all that much in an application drawing amps, where the load peaks are on the order of milliseconds. So.. assuming that at full power, voice peaks, you're drawing about 15 Amps, the cap voltage drop will be about 15/(2*470E-6) -> 16V/ millisecond (assuming no replacement energy from the bus). The bus has a fairly low impedance, though, so it's not that bad. Figure the wires have a resistance of about 0.02 ohms, or 0.3V drop with the 15A load, so when you go from zero to full power, the bus voltage drops that much. When the load goes on, the capacitor will supply energy for the first few 10s of microseconds, then it's basically all done. Think of the filter capacitor as being the C in an RC time constant with the R being the load resistance (about 1 ohm, here). I suspect you need a MUCH stiffer power supply, if you're operating at a level where the voltage on the amplifier makes a difference. ___ 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] TX Audio Quality Help, please!
The finals have two 470 uF caps in paralles (940 uF) right at the PA RF chokes and another 470 uF at the driver for a total of 1410 uF on the 13.8V bus. That does not count a string of 0.1 uF caps in parallel. Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Lloyd Sent: Friday, July 11, 2008 2:40 PM To: k5nwa Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] TX Audio Quality Help, please! On Jul 11, 2008, at 6:44 AM, k5nwa wrote: > At 07:54 AM 7/11/2008, you wrote: >> However, I did notice a strange occurrence on the oscolloscope, with >> the SEC-1223Â keydown continuous, there was just a voltage drop. But >> with the W-30AM, there was oscillation between the dropped voltage >> and the full voltage on continuous keydown. > >> Will this oscillation cause my problems? I see it as TVI/RFI and am >> awaiting my XYL to return from work to get her assistance in more >> testing. Kind Rgds, Gwyn - G4FKH > > Oscillations are not good at all. You need a better power supply or a > lot of work on cleaning that one up. > > I keep mentioning that to test the power supply you need a dynamic > test not a steady state test because how the power supply reacts to > change can be many times worse than the wiring drop, but it seems that > the people testing are bent on doing static test which are rather > useless in the long run. Forget DVM's they are too slow to see what is > going on you need an oscilloscope. > > You can take a horse to water but . It is all part of the testing process. Remember, the power feed system has it own *impedance*. That means resistance AND reactance. The static test is measuring the *resistance* of the power supply and power wiring. Certainly one can tackle those problems first, mostly just use fatter wire. Certainly the measurements at the output of the power supply suggest that the supply is very "stiff" and doesn't change much from no-load to full-load. But we aren't measuring the reactive portion. The biggest problem is inductance in the wire. First step to combat that is the bring the wires as close as possible in parallel (or twist them) in order to cancel their mutual inductance. That will help stiffen things up to a dynamic signal. The other thing that will help is to put a lot of energy storage (capacitance) right at the load (radio) in order to cancel out the inductive component of the wire. So yeah Cecil, a scope will let us see what is going on right at the radio. OTOH, I am sure that Flex could tell us if there is sufficient bypass inside the radio itself thus solving the problem. -- 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT 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/ ___ 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] Just how much DC Power Supply sag is acceptable?
Bruce, Well I know through experience that the Kenwoood TS-2000 will start to distort at 13 volts and motorboat at 12.5, much happier at 14.5 volts. 73, Dudley WA5QPZ Bruce Mills - KL7JDR wrote: > If the FLEX 5000a transmit audio distortion is caused by voltage sag ? > Why is this radio more prone to it than all the other 13v rigs, including the > SDR-1000 ? > > 73's , Bruce > >KL7JDR > > Bruce W. Mills > P.O. Box 1500 > 31490 Echo Lake Road > Soldotna , Alaska >99669 > > (907)262-4373 > > [EMAIL PROTECTED] > > > > > ___ > 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] Just how much DC Power Supply sag is acceptable?
At 11:33 AM 7/11/2008, Gerald Youngblood wrote: >Jim, >There are two levels of voltage regulation between the main supply and the >DAC: 13.8V --> 5V --> 3.3V. ooohh.. that's going to be pretty darn good, then. So much for that wild speculation. jim ___ 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] TX Audio Quality Help, please!
On Jul 11, 2008, at 6:44 AM, k5nwa wrote: > At 07:54 AM 7/11/2008, you wrote: >> However, I did notice a strange occurrence on >> the oscolloscope, with the SEC-1223Â keydown >> continuous, there was just a voltage drop. But >> with the W-30AM, there was oscillation between >> the dropped voltage and the full voltage on continuous keydown. > >> Will this oscillation cause my problems? I see >> it as TVI/RFI and am awaiting my XYL to return >> from work to get her assistance in more testing. Kind Rgds, Gwyn - >> G4FKH > > Oscillations are not good at all. You need a > better power supply or a lot of work on cleaning that one up. > > I keep mentioning that to test the power supply > you need a dynamic test not a steady state test > because how the power supply reacts to change can > be many times worse than the wiring drop, but it > seems that the people testing are bent on doing > static test which are rather useless in the long > run. Forget DVM's they are too slow to see what > is going on you need an oscilloscope. > > You can take a horse to water but . It is all part of the testing process. Remember, the power feed system has it own *impedance*. That means resistance AND reactance. The static test is measuring the *resistance* of the power supply and power wiring. Certainly one can tackle those problems first, mostly just use fatter wire. Certainly the measurements at the output of the power supply suggest that the supply is very "stiff" and doesn't change much from no-load to full-load. But we aren't measuring the reactive portion. The biggest problem is inductance in the wire. First step to combat that is the bring the wires as close as possible in parallel (or twist them) in order to cancel their mutual inductance. That will help stiffen things up to a dynamic signal. The other thing that will help is to put a lot of energy storage (capacitance) right at the load (radio) in order to cancel out the inductive component of the wire. So yeah Cecil, a scope will let us see what is going on right at the radio. OTOH, I am sure that Flex could tell us if there is sufficient bypass inside the radio itself thus solving the problem. -- 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT 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] Just how much DC Power Supply sag is acceptable?
Jim, I seem to recall from earlier posts that the distortion is not preset at the input to the PA. It is being generated in the PA itself. 73, Ray, K9DUR ___ 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] RX2 Off Frequency Issue
How about a software defined fly swatter? -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joel Harrison Sent: Friday, July 11, 2008 2:51 PM To: flexradio@flex-radio.biz Subject: Re: [Flexradio] RX2 Off Frequency Issue Thanks Tim...I have not yet done so, but will right now since I'm goofing off in the shack today. 73 Joel W5ZN p.s. Do I win a coffee cup for finding and reporting a bug?? :-)) Just Kidding! -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Friday, July 11, 2008 1:45 PM To: Steve Kallal; [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: RE: [Flexradio] RX2 Off Frequency Issue Yep, it looks like a bug. Please submit a Bug Tracker report if you already haven't done so. Thanks. -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Kallal Sent: Friday, July 11, 2008 1:47 PM To: [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: Re: [Flexradio] RX2 Off Frequency Issue Yes I have seen the same bug, but didn't get around to posting it on the bug tracker yet. I noticed it one evening on 40 meters with RX1 set to CW at the low end and RX2 listening up in the phone section. I haven't tried it in reverse, that is RX1 as SSB and RX2 as CW. 73, Steve N6VL - Original Message From: Joel Harrison <[EMAIL PROTECTED]> To: flexradio@flex-radio.biz Sent: Friday, July 11, 2008 9:46:51 AM Subject: [Flexradio] RX2 Off Frequency Issue I want to see if anyone else has reported or is aware of the following problem. It pertains to the Flex 5000A with RX2 installed. When RX1 is in CW mode and RX2 is in either USB or LSB, the RX2 frequency will be off by the CW pitch frequency. For example, if I have RX1 on 6 meter CW and RX 2 is on 20 meters USB, say 14185.0 listening to the guys there, to tune them in I have to go to 14185.5 (.5 KHz is my CW freq). If I change my CW pitch freq to 750 Hz, then I have to tune RX2 in USB mode to 14185.75 to tune them in properly. The same thing happens when RX2 is in LSB as well on, say 80 or 40 meters. When RX1 is in a SSB mode, everything is fine, but this happens every time I have RX1 on CW and RX2 on SSB. W5LUA and I were chatting a bit earlier and I asked Al to see if his 5000 produced the same response and it did. If you have both RX's on SSB and switch RX1 to CW, you will not notice the frequency change in RX2 until you change the frequency. So, if you switch RX1 to CW and move RX2 by 1 Hz it will jump to the CW pitch frequency offset and RX2 will remain in that condition until RX1 is returned to SSB. If RX1 is in LSB and RX2 is on USB everything is fine. It only occurs when RX1 is in CW and RX2 is in SSB. So, has this been experienced before by anyone? Is this a software bug? Inquiring minds need to know!! 73 from your humble Flex Monster Joel W5ZN ___ 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/ ___ 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] RX2 Off Frequency Issue
Thanks Tim...I have not yet done so, but will right now since I'm goofing off in the shack today. 73 Joel W5ZN p.s. Do I win a coffee cup for finding and reporting a bug?? :-)) Just Kidding! -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Friday, July 11, 2008 1:45 PM To: Steve Kallal; [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: RE: [Flexradio] RX2 Off Frequency Issue Yep, it looks like a bug. Please submit a Bug Tracker report if you already haven't done so. Thanks. -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Kallal Sent: Friday, July 11, 2008 1:47 PM To: [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: Re: [Flexradio] RX2 Off Frequency Issue Yes I have seen the same bug, but didn't get around to posting it on the bug tracker yet. I noticed it one evening on 40 meters with RX1 set to CW at the low end and RX2 listening up in the phone section. I haven't tried it in reverse, that is RX1 as SSB and RX2 as CW. 73, Steve N6VL - Original Message From: Joel Harrison <[EMAIL PROTECTED]> To: flexradio@flex-radio.biz Sent: Friday, July 11, 2008 9:46:51 AM Subject: [Flexradio] RX2 Off Frequency Issue I want to see if anyone else has reported or is aware of the following problem. It pertains to the Flex 5000A with RX2 installed. When RX1 is in CW mode and RX2 is in either USB or LSB, the RX2 frequency will be off by the CW pitch frequency. For example, if I have RX1 on 6 meter CW and RX 2 is on 20 meters USB, say 14185.0 listening to the guys there, to tune them in I have to go to 14185.5 (.5 KHz is my CW freq). If I change my CW pitch freq to 750 Hz, then I have to tune RX2 in USB mode to 14185.75 to tune them in properly. The same thing happens when RX2 is in LSB as well on, say 80 or 40 meters. When RX1 is in a SSB mode, everything is fine, but this happens every time I have RX1 on CW and RX2 on SSB. W5LUA and I were chatting a bit earlier and I asked Al to see if his 5000 produced the same response and it did. If you have both RX's on SSB and switch RX1 to CW, you will not notice the frequency change in RX2 until you change the frequency. So, if you switch RX1 to CW and move RX2 by 1 Hz it will jump to the CW pitch frequency offset and RX2 will remain in that condition until RX1 is returned to SSB. If RX1 is in LSB and RX2 is on USB everything is fine. It only occurs when RX1 is in CW and RX2 is in SSB. So, has this been experienced before by anyone? Is this a software bug? Inquiring minds need to know!! 73 from your humble Flex Monster Joel W5ZN ___ 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/ ___ 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] RX2 Off Frequency Issue
Yep, it looks like a bug. Please submit a Bug Tracker report if you already haven't done so. Thanks. -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Kallal Sent: Friday, July 11, 2008 1:47 PM To: [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: Re: [Flexradio] RX2 Off Frequency Issue Yes I have seen the same bug, but didn't get around to posting it on the bug tracker yet. I noticed it one evening on 40 meters with RX1 set to CW at the low end and RX2 listening up in the phone section. I haven't tried it in reverse, that is RX1 as SSB and RX2 as CW. 73, Steve N6VL - Original Message From: Joel Harrison <[EMAIL PROTECTED]> To: flexradio@flex-radio.biz Sent: Friday, July 11, 2008 9:46:51 AM Subject: [Flexradio] RX2 Off Frequency Issue I want to see if anyone else has reported or is aware of the following problem. It pertains to the Flex 5000A with RX2 installed. When RX1 is in CW mode and RX2 is in either USB or LSB, the RX2 frequency will be off by the CW pitch frequency. For example, if I have RX1 on 6 meter CW and RX 2 is on 20 meters USB, say 14185.0 listening to the guys there, to tune them in I have to go to 14185.5 (.5 KHz is my CW freq). If I change my CW pitch freq to 750 Hz, then I have to tune RX2 in USB mode to 14185.75 to tune them in properly. The same thing happens when RX2 is in LSB as well on, say 80 or 40 meters. When RX1 is in a SSB mode, everything is fine, but this happens every time I have RX1 on CW and RX2 on SSB. W5LUA and I were chatting a bit earlier and I asked Al to see if his 5000 produced the same response and it did. If you have both RX's on SSB and switch RX1 to CW, you will not notice the frequency change in RX2 until you change the frequency. So, if you switch RX1 to CW and move RX2 by 1 Hz it will jump to the CW pitch frequency offset and RX2 will remain in that condition until RX1 is returned to SSB. If RX1 is in LSB and RX2 is on USB everything is fine. It only occurs when RX1 is in CW and RX2 is in SSB. So, has this been experienced before by anyone? Is this a software bug? Inquiring minds need to know!! 73 from your humble Flex Monster Joel W5ZN ___ 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/ ___ 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] Just how much DC Power Supply sag is acceptable?
If the FLEX 5000a transmit audio distortion is caused by voltage sag ? Why is this radio more prone to it than all the other 13v rigs, including the SDR-1000 ? 73's , Bruce KL7JDR Bruce W. Mills P.O. Box 1500 31490 Echo Lake Road Soldotna , Alaska 99669 (907)262-4373 [EMAIL PROTECTED] ___ 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] Just how much DC Power Supply sag is acceptable?
Jim, There are two levels of voltage regulation between the main supply and the DAC: 13.8V --> 5V --> 3.3V. Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: Jim Lux [mailto:[EMAIL PROTECTED] Sent: Friday, July 11, 2008 12:24 PM To: [EMAIL PROTECTED]; 'Jerry'; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] Just how much DC Power Supply sag is acceptable? At 09:34 AM 7/11/2008, Gerald Youngblood wrote: >The 5000C power supply is external, just like the 5000A > > >From: Jim Lux [mailto:[EMAIL PROTECTED] At 08:52 AM 7/11/2008, >Gerald Youngblood wrote: > > >Hello all, > > > >Jerry's comments below are absolutely correct. Distortion should be > >measurable using standard two tone lab tests. If you can't measure > >it, you can't quantitatively work on it. > > > >We have Jeff Anderson's (K6JCA) original radio in the lab for testing. > >This is the radio he first reported as having distortion. To date > >have not been able to recreate the same type of distortion here in > >the lab that Jeff has been experiencing. > > >I'm sort of lazy, so I haven't checked, but does the F5K Model C (with >PC) have a DC power supply built in? Or is it taking 12V and then >using a 12V input power supply for the PC? Aha.. that starts to look like power supply issues, then... since I assume Jeff didn't send you his power supply as well as the radio? There's, of course, the obvious issue with PS sag into the final PA, BUT.. there's a couple other areas one might want to take a look at (having been bitten by this sort of thing before). The raw 12V is probably processed through some sort of DC/DC converter to provide power for the audio DACs. What's the line regulation of that process? If the RF output power coming up sags the DC line a bit (which is inevitable), what happens to the supply rails on the DAC and audio stages? Is there a possibility that you're getting actual bit errors in the data transfer to the DAC (say, because of a transient or pulling close to timing margins).. maybe there's a CMOS gate (for which the threshold is 1/2 Vdd) that's shifting a bit. ___ 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] RX2 Off Frequency Issue
No, it does not do it in reverse, but in reverse (RX2 on CW and RX1 on SSB) you don't have a CW Pitch Freq that comes into play with RX2. 73 Joel W5ZN -Original Message- From: Steve Kallal [mailto:[EMAIL PROTECTED] Sent: Friday, July 11, 2008 12:47 PM To: [EMAIL PROTECTED]; flexradio@flex-radio.biz Subject: Re: [Flexradio] RX2 Off Frequency Issue Yes I have seen the same bug, but didn't get around to posting it on the bug tracker yet. I noticed it one evening on 40 meters with RX1 set to CW at the low end and RX2 listening up in the phone section. I haven't tried it in reverse, that is RX1 as SSB and RX2 as CW. 73, Steve N6VL ___ 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] PA distortion...
I noticed in the test setup announced earlier this morning that an RS35M was going to be the power source set for 14.3Vdc. Considering that some have commented on their Astron's actually being set to produce ~13.8Vdc, would it be beneficial, or at least another real world data point to try the IMD test with the power supply set for 13.8Vdc? Just a thought. Thank you, Mike W5CUL Gerald Youngblood <[EMAIL PROTECTED]> wrote: These are still very good numbers, even at low power. The ARRL graph tops out at -35 dB PEP on third order products in their reviews. We measured -40 dB PEP at 100W and -37 dB PEP at 25W this morning as I reported earlier. Note, mileage may vary unit to unit. Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Al Sent: Friday, July 11, 2008 10:55 AM To: flexradio@flex-radio.biz Subject: [Flexradio] PA distortion... I just took the opportunity to make a couple of IMD tests on my SDR 1000 and F5K (received May 08) Both radios meet spec distortion at rated output however at lower output levels, the F5K has higher levels of IMD relative the the desired signal and does the SDR-1000. Peak Output IMD db below peak Watts SDR 1K F5K 1 -46 -34 10 -38 -30 50 -38 -36 100 -35 -35 SDR 1K IMD reading where using F5K Rcvr and F5K IMD reading on the SDR-1000 Rcvr. The trend of the F5K readings seem to indicate crossover distortion at lower drive levels. With SSB and no processing, most of the signal is at lower levels. With AM, the carrier alone drives beyond the crossover region. The trend would also seem to indicate the power supply droop is not the cause (lower output, less droop ) I am using Astron RS 50 power supplies and also have about 0.4 volt of cable drop. I have NOT had any complaints about my audio quality but have not solicted comments either. This test was with same software version on both radios and with D44 sound card on SDR-1000. Care was taken to avoid overloading the receiver. The IMD of the driver outputs are better -60db. Other radios and systems could get different results. AL, K0VM ___ 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/ ___ 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] RX2 Off Frequency Issue
Yes I have seen the same bug, but didn't get around to posting it on the bug tracker yet. I noticed it one evening on 40 meters with RX1 set to CW at the low end and RX2 listening up in the phone section. I haven't tried it in reverse, that is RX1 as SSB and RX2 as CW. 73, Steve N6VL - Original Message From: Joel Harrison <[EMAIL PROTECTED]> To: flexradio@flex-radio.biz Sent: Friday, July 11, 2008 9:46:51 AM Subject: [Flexradio] RX2 Off Frequency Issue I want to see if anyone else has reported or is aware of the following problem. It pertains to the Flex 5000A with RX2 installed. When RX1 is in CW mode and RX2 is in either USB or LSB, the RX2 frequency will be off by the CW pitch frequency. For example, if I have RX1 on 6 meter CW and RX 2 is on 20 meters USB, say 14185.0 listening to the guys there, to tune them in I have to go to 14185.5 (.5 KHz is my CW freq). If I change my CW pitch freq to 750 Hz, then I have to tune RX2 in USB mode to 14185.75 to tune them in properly. The same thing happens when RX2 is in LSB as well on, say 80 or 40 meters. When RX1 is in a SSB mode, everything is fine, but this happens every time I have RX1 on CW and RX2 on SSB. W5LUA and I were chatting a bit earlier and I asked Al to see if his 5000 produced the same response and it did. If you have both RX's on SSB and switch RX1 to CW, you will not notice the frequency change in RX2 until you change the frequency. So, if you switch RX1 to CW and move RX2 by 1 Hz it will jump to the CW pitch frequency offset and RX2 will remain in that condition until RX1 is returned to SSB. If RX1 is in LSB and RX2 is on USB everything is fine. It only occurs when RX1 is in CW and RX2 is in SSB. So, has this been experienced before by anyone? Is this a software bug? Inquiring minds need to know!! 73 from your humble Flex Monster Joel W5ZN ___ 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] PA distortion...
At 10:12 AM 7/11/2008, Rob Sherwood wrote: >If the League graph cannot display better than -35 dB PEP, how does >it test a FT-1000 Mk V in class A? It has phenomenal numbers. Real >measured data on the rig owned by W6XX shows 3rd order -48 dBc and >5th order -76 dBc. Not only should we look at 3rd order numbers, >but the higher order numbers that often fall off rather gradually, >compared to a classic tube rig like the S-Line. > >If you say, "so what" on the rig running class A, since you are >likely going to drive an amp, the 8877 being driven by W6XX shows >only a 2 dB degradation in 3rd order at 1.5 kW output. > >If a rig is likely going to be run mobile, a 13.8 V. amp is >certainly desirable. On the other hand, it would be interesting for >more OEMs to consider higher-voltage PAs for rigs that will never >see the light of day in a car, truck or boat. Better IM numbers >would likely follow. Of course many ALC circuits would need to be >improved, as ALC-induced splatter is another ignored subject at the League. > >73, >Rob >NC0B Well, heck, nobody said you have to run the PA devices directly from your DC bus, either. A clever design would use a DC/DC boost converter to get to 50-100V or whatever you want to use for your FETs, making life a lot easier on lots of parts of the overall design. I'll bet that overall, you'd have better DC->RF power efficiency... what you lose in your purpose designed DC/DC converter might be made up in reduced IR losses for lower currents in the RF circuitry. Not to mention that once you've got the converter, making it also regulate isn't a huge deal. You could even do multiple power modes (i.e. idle the converter when the rig's not in transmit mode). The whole "gotta run the PA from the car battery" probably comes from a desire to use inexpensive transistors intended for the AM CB market, where getting 5W out isn't a big deal from a 12V nominal bus. And of course, there is that interesting prevalence of equipment being made today, designed recently, basically inheriting 20-30 year old designs from Moto app notes.. not that the designs are inherently bad, but there's a lot of new technology out there that has big potential benefits. ___ 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] Just how much DC Power Supply sag is acceptable?
At 09:34 AM 7/11/2008, Gerald Youngblood wrote: >The 5000C power supply is external, just like the 5000A > > >From: Jim Lux [mailto:[EMAIL PROTECTED] >At 08:52 AM 7/11/2008, Gerald Youngblood wrote: > > >Hello all, > > > >Jerry's comments below are absolutely correct. Distortion should be > >measurable using standard two tone lab tests. If you can't measure it, > >you can't quantitatively work on it. > > > >We have Jeff Anderson's (K6JCA) original radio in the lab for testing. > >This is the radio he first reported as having distortion. To date have > >not been able to recreate the same type of distortion here in the lab > >that Jeff has been experiencing. > > >I'm sort of lazy, so I haven't checked, but does the F5K Model C (with PC) >have a DC power supply built in? Or is it taking 12V and then using a 12V >input power supply for the PC? Aha.. that starts to look like power supply issues, then... since I assume Jeff didn't send you his power supply as well as the radio? There's, of course, the obvious issue with PS sag into the final PA, BUT.. there's a couple other areas one might want to take a look at (having been bitten by this sort of thing before). The raw 12V is probably processed through some sort of DC/DC converter to provide power for the audio DACs. What's the line regulation of that process? If the RF output power coming up sags the DC line a bit (which is inevitable), what happens to the supply rails on the DAC and audio stages? Is there a possibility that you're getting actual bit errors in the data transfer to the DAC (say, because of a transient or pulling close to timing margins).. maybe there's a CMOS gate (for which the threshold is 1/2 Vdd) that's shifting a bit. ___ 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] PA distortion...
Error. Those numbers were PEP, not dBc. Sorry. 73, Rob, NC0B >>> "Rob Sherwood" <[EMAIL PROTECTED]> 7/11/2008 11:12 am >>> If the League graph cannot display better than -35 dB PEP, how does it test a FT-1000 Mk V in class A? It has phenomenal numbers. Real measured data on the rig owned by W6XX shows 3rd order -48 dBc and 5th order -76 dBc. Not only should we look at 3rd order numbers, but the higher order numbers that often fall off rather gradually, compared to a classic tube rig like the S-Line. If you say, "so what" on the rig running class A, since you are likely going to drive an amp, the 8877 being driven by W6XX shows only a 2 dB degradation in 3rd order at 1.5 kW output. If a rig is likely going to be run mobile, a 13.8 V. amp is certainly desirable. On the other hand, it would be interesting for more OEMs to consider higher-voltage PAs for rigs that will never see the light of day in a car, truck or boat. Better IM numbers would likely follow. Of course many ALC circuits would need to be improved, as ALC-induced splatter is another ignored subject at the League. 73, Rob NC0B >>> "Gerald Youngblood" <[EMAIL PROTECTED]> 7/11/2008 10:44 am >>> These are still very good numbers, even at low power. The ARRL graph tops out at -35 dB PEP on third order products in their reviews. We measured -40 dB PEP at 100W and -37 dB PEP at 25W this morning as I reported earlier. Note, mileage may vary unit to unit. Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Al Sent: Friday, July 11, 2008 10:55 AM To: flexradio@flex-radio.biz Subject: [Flexradio] PA distortion... I just took the opportunity to make a couple of IMD tests on my SDR 1000 and F5K (received May 08) Both radios meet spec distortion at rated output however at lower output levels, the F5K has higher levels of IMD relative the the desired signal and does the SDR-1000. Peak Output IMD db below peak Watts SDR 1K F5K 1 -46 -34 10-38 -30 50-38 -36 100 -35 -35 SDR 1K IMD reading where using F5K Rcvr and F5K IMD reading on the SDR-1000 Rcvr. The trend of the F5K readings seem to indicate crossover distortion at lower drive levels. With SSB and no processing, most of the signal is at lower levels. With AM, the carrier alone drives beyond the crossover region. The trend would also seem to indicate the power supply droop is not the cause (lower output, less droop ) I am using Astron RS 50 power supplies and also have about 0.4 volt of cable drop. I have NOT had any complaints about my audio quality but have not solicted comments either. This test was with same software version on both radios and with D44 sound card on SDR-1000. Care was taken to avoid overloading the receiver. The IMD of the driver outputs are better -60db. Other radios and systems could get different results. AL, K0VM ___ 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/ -- If this email is spam, report it here: http://www.onlymyemail.com/view/?action=reportSpam&Id=ODExMjI6Njg3NDY4OTgzOnJvYkBuYzBiLmNvbQ%3D%3D ___ 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/ -- If this email is spam, report it here: http://www.onlymyemail.com/view/?action=reportSpam&Id=ODExMjI6Njg3NDg4NDA2OnJvYkBuYzBiLmNvbQ%3D%3D ___ 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] PA distortion...
If the League graph cannot display better than -35 dB PEP, how does it test a FT-1000 Mk V in class A? It has phenomenal numbers. Real measured data on the rig owned by W6XX shows 3rd order -48 dBc and 5th order -76 dBc. Not only should we look at 3rd order numbers, but the higher order numbers that often fall off rather gradually, compared to a classic tube rig like the S-Line. If you say, "so what" on the rig running class A, since you are likely going to drive an amp, the 8877 being driven by W6XX shows only a 2 dB degradation in 3rd order at 1.5 kW output. If a rig is likely going to be run mobile, a 13.8 V. amp is certainly desirable. On the other hand, it would be interesting for more OEMs to consider higher-voltage PAs for rigs that will never see the light of day in a car, truck or boat. Better IM numbers would likely follow. Of course many ALC circuits would need to be improved, as ALC-induced splatter is another ignored subject at the League. 73, Rob NC0B >>> "Gerald Youngblood" <[EMAIL PROTECTED]> 7/11/2008 10:44 am >>> These are still very good numbers, even at low power. The ARRL graph tops out at -35 dB PEP on third order products in their reviews. We measured -40 dB PEP at 100W and -37 dB PEP at 25W this morning as I reported earlier. Note, mileage may vary unit to unit. Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Al Sent: Friday, July 11, 2008 10:55 AM To: flexradio@flex-radio.biz Subject: [Flexradio] PA distortion... I just took the opportunity to make a couple of IMD tests on my SDR 1000 and F5K (received May 08) Both radios meet spec distortion at rated output however at lower output levels, the F5K has higher levels of IMD relative the the desired signal and does the SDR-1000. Peak Output IMD db below peak Watts SDR 1K F5K 1 -46 -34 10-38 -30 50-38 -36 100 -35 -35 SDR 1K IMD reading where using F5K Rcvr and F5K IMD reading on the SDR-1000 Rcvr. The trend of the F5K readings seem to indicate crossover distortion at lower drive levels. With SSB and no processing, most of the signal is at lower levels. With AM, the carrier alone drives beyond the crossover region. The trend would also seem to indicate the power supply droop is not the cause (lower output, less droop ) I am using Astron RS 50 power supplies and also have about 0.4 volt of cable drop. I have NOT had any complaints about my audio quality but have not solicted comments either. This test was with same software version on both radios and with D44 sound card on SDR-1000. Care was taken to avoid overloading the receiver. The IMD of the driver outputs are better -60db. Other radios and systems could get different results. AL, K0VM ___ 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/ -- If this email is spam, report it here: http://www.onlymyemail.com/view/?action=reportSpam&Id=ODExMjI6Njg3NDY4OTgzOnJvYkBuYzBiLmNvbQ%3D%3D ___ 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] RX2 Off Frequency Issue
I want to see if anyone else has reported or is aware of the following problem. It pertains to the Flex 5000A with RX2 installed. When RX1 is in CW mode and RX2 is in either USB or LSB, the RX2 frequency will be off by the CW pitch frequency. For example, if I have RX1 on 6 meter CW and RX 2 is on 20 meters USB, say 14185.0 listening to the guys there, to tune them in I have to go to 14185.5 (.5 KHz is my CW freq). If I change my CW pitch freq to 750 Hz, then I have to tune RX2 in USB mode to 14185.75 to tune them in properly. The same thing happens when RX2 is in LSB as well on, say 80 or 40 meters. When RX1 is in a SSB mode, everything is fine, but this happens every time I have RX1 on CW and RX2 on SSB. W5LUA and I were chatting a bit earlier and I asked Al to see if his 5000 produced the same response and it did. If you have both RX's on SSB and switch RX1 to CW, you will not notice the frequency change in RX2 until you change the frequency. So, if you switch RX1 to CW and move RX2 by 1 Hz it will jump to the CW pitch frequency offset and RX2 will remain in that condition until RX1 is returned to SSB. If RX1 is in LSB and RX2 is on USB everything is fine. It only occurs when RX1 is in CW and RX2 is in SSB. So, has this been experienced before by anyone? Is this a software bug? Inquiring minds need to know!! 73 from your humble Flex Monster Joel W5ZN ___ 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] PA distortion...
These are still very good numbers, even at low power. The ARRL graph tops out at -35 dB PEP on third order products in their reviews. We measured -40 dB PEP at 100W and -37 dB PEP at 25W this morning as I reported earlier. Note, mileage may vary unit to unit. Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Al Sent: Friday, July 11, 2008 10:55 AM To: flexradio@flex-radio.biz Subject: [Flexradio] PA distortion... I just took the opportunity to make a couple of IMD tests on my SDR 1000 and F5K (received May 08) Both radios meet spec distortion at rated output however at lower output levels, the F5K has higher levels of IMD relative the the desired signal and does the SDR-1000. Peak Output IMD db below peak Watts SDR 1K F5K 1 -46 -34 10-38 -30 50-38 -36 100 -35 -35 SDR 1K IMD reading where using F5K Rcvr and F5K IMD reading on the SDR-1000 Rcvr. The trend of the F5K readings seem to indicate crossover distortion at lower drive levels. With SSB and no processing, most of the signal is at lower levels. With AM, the carrier alone drives beyond the crossover region. The trend would also seem to indicate the power supply droop is not the cause (lower output, less droop ) I am using Astron RS 50 power supplies and also have about 0.4 volt of cable drop. I have NOT had any complaints about my audio quality but have not solicted comments either. This test was with same software version on both radios and with D44 sound card on SDR-1000. Care was taken to avoid overloading the receiver. The IMD of the driver outputs are better -60db. Other radios and systems could get different results. AL, K0VM ___ 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] Just how much DC Power Supply sag is acceptable?
The 5000C power supply is external, just like the 5000A Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: Jim Lux [mailto:[EMAIL PROTECTED] Sent: Friday, July 11, 2008 11:00 AM To: [EMAIL PROTECTED]; 'Jerry'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? At 08:52 AM 7/11/2008, Gerald Youngblood wrote: >Hello all, > >Jerry's comments below are absolutely correct. Distortion should be >measurable using standard two tone lab tests. If you can't measure it, >you can't quantitatively work on it. > >We have Jeff Anderson's (K6JCA) original radio in the lab for testing. >This is the radio he first reported as having distortion. To date have >not been able to recreate the same type of distortion here in the lab >that Jeff has been experiencing. I'm sort of lazy, so I haven't checked, but does the F5K Model C (with PC) have a DC power supply built in? Or is it taking 12V and then using a 12V input power supply for the PC? ___ 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 with Flex-5000 - TX Compression.
Hola Ruben. See my comments below -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ruben Navarro Huedo Sent: Friday, July 11, 2008 12:01 PM To: flexradio@flex-radio.biz Subject: [Flexradio] New with Flex-5000 - TX Compression. Hello friends: I am Ruben from Spain. I am new with Flex-5000. I owned before a SDR-1000. It is really great. It has been running in 10min in my little laptop. I have a little question: I am running PowerSDR 1.12.0. I don't find transmit compression settings inside Transmitd TAB. Where could i find them? [Tim] The Compression was removed because it just didn't work. It was replaced by an updated Compander (CPDR). The DX button is the Compander with a higher compression ratio. Both the Compander and the DX Compander have variable gain setting (the sliders on the console) another: I have to buy a new laptop, but until them i have to use my little 1.73Ghz (single core). Is running fine with 96 khz and 1024 (buffer). I have some little audio dropouts, but not important. Do you recomend me some testing for lower cpu load until i will be a new laptop? [Tim] There may not be a lot you can do, but looks at these KB articles. http://kb.flex-radio.com/article.aspx?id=10307 http://kb.flex-radio.com/article.aspx?id=10417 http://kb.flex-radio.com/article.aspx?id=10422 http://kb.flex-radio.com/article.aspx?id=10423 Laptops usually have poor I/O performance especially with the integrated peripherals like the Firewire interface because they are designed for size, weight, battery life and heat dissipation and not raw I/O performance. TNX a lot. --- Rubén Navarro Huedo http://www.palotes.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/ ___ 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] New with Flex-5000 - TX Compression.
Hello friends: I am Ruben from Spain. I am new with Flex-5000. I owned before a SDR-1000. It is really great. It has been running in 10min in my little laptop. I have a little question: I am running PowerSDR 1.12.0. I don't find transmit compression settings inside Transmitd TAB. Where could i find them? another: I have to buy a new laptop, but until them i have to use my little 1.73Ghz (single core). Is running fine with 96 khz and 1024 (buffer). I have some little audio dropouts, but not important. Do you recomend me some testing for lower cpu load until i will be a new laptop? TNX a lot. --- Rubén Navarro Huedo http://www.palotes.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] Just how much DC Power Supply sag is acceptable?
At 08:52 AM 7/11/2008, Gerald Youngblood wrote: >Hello all, > >Jerry's comments below are absolutely correct. Distortion should be >measurable using standard two tone lab tests. If you can't measure it, you >can't quantitatively work on it. > >We have Jeff Anderson's (K6JCA) original radio in the lab for testing. This >is the radio he first reported as having distortion. To date have not been >able to recreate the same type of distortion here in the lab that Jeff has >been experiencing. I'm sort of lazy, so I haven't checked, but does the F5K Model C (with PC) have a DC power supply built in? Or is it taking 12V and then using a 12V input power supply for the PC? ___ 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] PA distortion...
I just took the opportunity to make a couple of IMD tests on my SDR 1000 and F5K (received May 08) Both radios meet spec distortion at rated output however at lower output levels, the F5K has higher levels of IMD relative the the desired signal and does the SDR-1000. Peak Output IMD db below peak Watts SDR 1K F5K 1 -46 -34 10-38 -30 50-38 -36 100 -35 -35 SDR 1K IMD reading where using F5K Rcvr and F5K IMD reading on the SDR-1000 Rcvr. The trend of the F5K readings seem to indicate crossover distortion at lower drive levels. With SSB and no processing, most of the signal is at lower levels. With AM, the carrier alone drives beyond the crossover region. The trend would also seem to indicate the power supply droop is not the cause (lower output, less droop ) I am using Astron RS 50 power supplies and also have about 0.4 volt of cable drop. I have NOT had any complaints about my audio quality but have not solicted comments either. This test was with same software version on both radios and with D44 sound card on SDR-1000. Care was taken to avoid overloading the receiver. The IMD of the driver outputs are better -60db. Other radios and systems could get different results. AL, K0VM ___ 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] Just how much DC Power Supply sag is acceptable?
Hello all, Jerry's comments below are absolutely correct. Distortion should be measurable using standard two tone lab tests. If you can't measure it, you can't quantitatively work on it. We have Jeff Anderson's (K6JCA) original radio in the lab for testing. This is the radio he first reported as having distortion. To date have not been able to recreate the same type of distortion here in the lab that Jeff has been experiencing. We performed two tone IMD measurements on the above referenced radio this morning using the following test setup: 30 dB directional coupler into a dummy load 10 dB attenuator between coupler and spectrum analyzer Astron RS35M set to 14.3V no load 2 feet of power cable (original cable cut to length) HP 7 series spectrum analyzer (Reference line = +60 dBm) PowerSDR internal two tone generator At 100W PEP the third order products were - 40 dB PEP (-34 dBc). At 25W PEP the third order products were -37 dB PEP (-31 dBc). Note that either of these would be off scale on the QST review charts that they now provide on the first page of each review. Here is a quote from page 45e of "HF Radio Systems & Circuits" by Willam E. Sabin and Edgar O. Schoenike: "Typical amateur-grade solid-state PA specifications range from -30 dB to -20 dB below one of two equal tones. More expensive military solid-state PA specifications range from -26 to -40 dB." Note that they are speaking in dBc terms. We will plan to post photos of the spectrum analyzer results later in the day on our website. We also plan to test IMD at varying voltages to quantify the effect. There is no doubt that low power supply voltage and/or power supply modulation will cause distortion in solid-state power amplifiers. Regards, Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jerry Sent: Thursday, July 10, 2008 11:02 PM To: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? Hi all I have to put my two cents in. The best way to check for distortion is to use a 2 tone test signal. If the power supply is truly giving problems there will be a noticeable flattoping of the output two tone waveform. If it is clean the problem is elsewhere. This wave form is available in PowerSDR. I would suggest 1kHz and 1.8 kHz. The default of 700 Hz is probably OK also. Sorry guys, had to join in the war of words. Less talk of words and use measurements. Those with spectrum analyzers can measure the change in the sum and difference frequencies to quantify the "HEARD" distortion. Is it subjective are digital artifacts? If the intermodulation products do not exist that is one thing. If they do maybe larger or multiple wires are needed between the PS and the PA. Do not forget the connectors. Ohmic losses at these points will cause significant voltage drops. Don't forget the ground returns. They are in the loop also. Good luck in isolation the source. -- de Jerry NO2T PS: I don't have any problem since I never drive more that 20 to 30 watts from the Flex-5k or the SDR-1k.The rest comes from my Alpha 77. At 09:29 PM 7/10/2008 -0500, you wrote: >Gerald, > >Yes, I understand the relationship between power, voltage, and impedance. >And I do not disagree that a small voltage drop can affect the radio >during transmit, even to the point of causing transmitted distortion. >My question regarding where the Vdc reading is being taken from and the >methodology used by the on board volt metering system in the 5000A is >in response to Robert Cleve's observations while testing into a dummy >load at 100W; see thread below. He is seeing a .4Vdc drop reported by >the 5000A which would seem pretty high given he is using a 50A power >supply and is presumably using the appropriate gage cable. I would >have suspected that the reading he is seeing may be off a little, which >is why I asked the question about the onboard Vdc meter system and >suggested using an O-Scope attached to the DC input right at the radio. >The other thing that troubles me about Robert's reading is that he >reports the Ammeter on his Astron was only showing a 7A draw during his >test. Again, I would suspect the meter on the Astron Power Supply is >not being entirely accurate as he should be seeing ~20 to 21A draw during a 100W key down. > >So now Robert's measurements prompted me to look at my 5000A using the >on board meter just to see what mine says. Below are the measurements: > >Idle: 13.8 >5W: 13.7 >10W: 13.6 >20W: 13.6 >50W: 13.5 >75W: 13.5 >100W: 13.4 > >The above measurements were taken using the built in metering system >(CTRL-SHIFT-I), using the Tune function, output power monitored and >adjusted using an on off board power meter. The power supply is an Astron RS-35M. >Not as beefy as
Re: [Flexradio] [SPAM] what was that new virtual com port program
I did a quick check of eterlogic on HRD and MixW On MixW it did not recognize the port HRD hung up trying to connect. I'm using WinXP SP3 on Q6600. Dave WA3FDB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tim Ellison Sent: Friday, July 11, 2008 7:05 AM To: FireBrick; FlexRadio List Subject: Re: [Flexradio] [SPAM] what was that new virtual com port program http://www.eterlogic.com/Products.VSPE.html I'll add it to the KB once it is shown to be a usable alternative by several people using it with success. I just don't have the time to put it through its paces. -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of FireBrick Sent: Friday, July 11, 2008 6:42 AM To: FlexRadio List Subject: [SPAM] [Flexradio] what was that new virtual com port program I have vCom I have com0com There was a mention of another program recently. I thought I'd saved it to a safe place, but as usual can't find it. pse and tu - "Traveling thru hyperspace isn't like dusting crops, boy." - Bill H. in Chicagoland webcams at http://76.16.160.118:8080/ Current Weather at http://hhweather.webhop.org ___ 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/ ___ 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] Pal star 1200 W Auto tuner
If you are speaking of the Palstar AT-AUTO the answer is yes. Several are using it with DDUtil and a standard PC. It should also work directly with PowerSDR by using the 5000C's serial port and connecting PowerSDR's CAT port to it. As far as RS-232 devices are concerned, the 5000C's PC is the same as any other. 73, Steve K5FR http://k5fr.com/ddutilwiki/ http://groups.yahoo.com/group/DDUtil/ -Original Message- Does anyone know if the tuner above will track and work with the 5000C? Phil ___ 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 5k, 6 meters and tstorms
At 07:50 PM 7/10/2008, FireBrick wrote: >I've been a ham for a long time but just started on 6 meters. > >We had a bunch of storms pass, not close but not that far either. > >I can't say I ever experienced this on the HF bands. > >I'd start to hear some noise on 6 meters, sort of like qrm from an >nearby stations fone transmission. >It would last a few seconds and fade. > >And then >maybe 5 seconds later, I'd hear the thunder. > >when I was a kid I was told that if you see the lightning, count, >and the number till thunger was heard would indicate how far away >the lightning bolt was. > >So would that same 'seconds to miles' relationship be in effect with >the audio from the flex and hearing the thunder? > > >On the HF bands, lighting caused noise was quick and sharp, fast >rise and fast fade. > >The lighting QRN I could hear on 6 really was long duration >(comparitively) and did indeed sound just like a ssb signal a just >outside of the USB passband. >It was also a pretty constant strength level for the few moments it >was audible. What you might be hearing is the following: Charge builds up on a structure and corona streamers come off. It can form a sort of relaxation oscillator with a distinct tone. (Charge builds up, a small spark to the air discharges a bunch, then it starts over). Those little sparks radiate broadband pulses, which you can definitely hear on a radio. The charge build up is in part due to the E-field over the surface of the earth, which gradually increases from the usual 1 kV/meter to around 10-20 kV/meter. When the lightning stroke occurs, the field in that area suddenly drops (terminating the buzzy tone), and then as the field comes back up, the discharge starts again. You can get a very similar effect with wind driven particles touching a surface. The phenomenon has been reported with both dust and rain drops, as well as snow and ice crystals. You can also get interesting effects when you have two objects connected with a small spark gap (e.g. an antenna on a tower, but insulated from it). One object charges, but not the other, until the voltage between them is enough to get the discharge started, then the charges equalize, etc. This one can produce a varying siren sort of phenomenon, where the RFI starts low pitched and gradually gets higher and higher, then restarts. In your case, if you're hearing the effect 5 seconds apart, that implies the lightning is about a mile away (e.g. sound travels 1000 ft/sec). The actual RF might be being generated much closer (like on your tower), because the field changes from lightning cover a fairly large area. There's some nify experiments you can do with just a wire antenna, a neon bulb, and a ground. The blink rate is roughly proportional to the current flow through the atmosphere in the area. Jim, W6RMK ___ 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] Just how much DC Power Supply sag is acceptable?
At 08:04 AM 7/11/2008, Mike Schlamp wrote: >Eric, > > Thank you very much for answering my question, and the > explanation; saves me from conducting Jim's test ;) That makes > perfect sense to me as I suspected something along those lines; a > sanity check point. > > To the rest; yes, I understand there is a ohmic voltage drop > across the power cable, some drop is to be expected. The point of > my measurements and sharing the data with the group was due to > those who were using the readings from the internal DC measurement > as a possible accurate indication of voltage drop during > transmit. .4Vdc to me is quite high, and suspect, .24Vdc across > the power cable is more believable. > > Thank you, > > Mike > W5CUL > > >Eric Wachsmann <[EMAIL PROTECTED]> wrote: > The internal DC measurement is not stable enough to use under load. The >0.4V drop during transmit is typical and does not reflect the real drop at >the terminals. > >The internal DC measurement is more of a sanity check accurate to within +/- >1V. Does bring up the interesting question of why the internal measurement varies that much.. I assume it's just some sort of low speed ADC tied to various places. Most monolithic ADCs have fairly decent internal references, so what's the explanation for the change in voltage being digitized. Just curious...not critical.. We have these sorts of internal voltage telemetry things in our spacecraft radios, and we're always looking to figure out potential mechanisms for "the telemetry is lying"... Jim ___ 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] VSPE
I took a quick look at VSPE as an alternative to VCOM and com0com... From what I can see, the current version of VSPE does NOT implement bit banging on the flow control RTS/DTR lines (PTT Control) but it does do CAT functions nicely.. You can set up port pairs like VCOM, or you can connect PSDR and a logging program to a single Virtual connector (port), or you connect multiple programs to a splitter. ( I haven't tried the TCP functions ) Out of the box, it does not load automatically, at boot up, your previous settings even though you may have saved them to a file. Nice user interface. AL, K0VM ___ 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] TX Audio Quality Help, please!
Cecil, One thing at a time. The static test with a DVM was quick enough to prove that one should not be using the internal DC measurement as an accurate indication of anything truly vital, other than to say that there is a voltage present from the power supply. The O-Scope test is a little more involved, thus is being saved for this weekend. I will be using a digital storage scope so that I may capture a bit of data. This horse only drinks on the weekends ;) Thank you, Mike W5CUL k5nwa <[EMAIL PROTECTED]> wrote: At 07:54 AM 7/11/2008, you wrote: >However, I did notice a strange occurrence on >the oscolloscope, with the SEC-1223Â keydown >continuous, there was just a voltage drop. But >with the W-30AM, there was oscillation between >the dropped voltage and the full voltage on continuous keydown. > Will this oscillation cause my problems? I see > it as TVI/RFI and am awaiting my XYL to return > from work to get her assistance in more testing. Kind Rgds, Gwyn - G4FKH Oscillations are not good at all. You need a better power supply or a lot of work on cleaning that one up. I keep mentioning that to test the power supply you need a dynamic test not a steady state test because how the power supply reacts to change can be many times worse than the wiring drop, but it seems that the people testing are bent on doing static test which are rather useless in the long run. Forget DVM's they are too slow to see what is going on you need an oscilloscope. You can take a horse to water but . Cecil K5NWA www.softrockradio.org www.qrpradio.com "Blessed are the cracked, for they shall let in the light." ___ 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] Just how much DC Power Supply sag is acceptable?
Eric, Thank you very much for answering my question, and the explanation; saves me from conducting Jim's test ;) That makes perfect sense to me as I suspected something along those lines; a sanity check point. To the rest; yes, I understand there is a ohmic voltage drop across the power cable, some drop is to be expected. The point of my measurements and sharing the data with the group was due to those who were using the readings from the internal DC measurement as a possible accurate indication of voltage drop during transmit. .4Vdc to me is quite high, and suspect, .24Vdc across the power cable is more believable. Thank you, Mike W5CUL Eric Wachsmann <[EMAIL PROTECTED]> wrote: The internal DC measurement is not stable enough to use under load. The 0.4V drop during transmit is typical and does not reflect the real drop at the terminals. The internal DC measurement is more of a sanity check accurate to within +/- 1V. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of W5CUL Sent: Thursday, July 10, 2008 9:30 PM To: [EMAIL PROTECTED] Cc: 'Flexradio' Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? Gerald, Yes, I understand the relationship between power, voltage, and impedance. And I do not disagree that a small voltage drop can affect the radio during transmit, even to the point of causing transmitted distortion. My question regarding where the Vdc reading is being taken from and the methodology used by the on board volt metering system in the 5000A is in response to Robert Cleve's observations while testing into a dummy load at 100W; see thread below. He is seeing a .4Vdc drop reported by the 5000A which would seem pretty high given he is using a 50A power supply and is presumably using the appropriate gage cable. I would have suspected that the reading he is seeing may be off a little, which is why I asked the question about the onboard Vdc meter system and suggested using an O-Scope attached to the DC input right at the radio. The other thing that troubles me about Robert's reading is that he reports the Ammeter on his Astron was only showing a 7A draw during his test. Again, I would suspect the meter on the Astron Power Supply is not being entirely accurate as he should be seeing ~20 to 21A draw during a 100W key down. So now Robert's measurements prompted me to look at my 5000A using the on board meter just to see what mine says. Below are the measurements: Idle: 13.8 5W: 13.7 10W: 13.6 20W: 13.6 50W: 13.5 75W: 13.5 100W: 13.4 The above measurements were taken using the built in metering system (CTRL-SHIFT-I), using the Tune function, output power monitored and adjusted using an on off board power meter. The power supply is an Astron RS-35M. Not as beefy as Robert's, but should hold up to a ~20A draw. Here are the same measurements using a DVM connected at the power supply: Idle: 13.87 5W: 13.85 10W: 13.85 20W: 13.85 50W: 13.84 75W: 13.83 100W: 13.83 Here are the same measurements using a DVM connected at the radio. Keep in mind that I am only monitoring one of the Vdc lines: Idle: 13.84 5W: 13.77 10W: 13.75 20W: 13.73 50W: 13.68 75W: 13.66 100W: 13.63 All of this seems to point towards a voltage drop along the DC power chain starting with the power supply, a larger drop seen across the OEM supplied power cable, and another large drop where the built in voltage meter system in the 5000A is taking its reading. Thank you, Mike W5CUL -Original Message- From: Gerald Youngblood [mailto:[EMAIL PROTECTED] Sent: Thursday, July 10, 2008 4:22 PM To: 'Flexradio'; 'Mike Schlamp' Subject: RE: [Flexradio] Just how much DC Power Supply sag is acceptable? Remember that power is the ratio of voltage squared over impedance. At 13.8V a small voltage difference can make a big effect on PA compression (i.e. distortion). Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Sherwood Sent: Thursday, July 10, 2008 4:08 PM To: Robert Cleve; Flexradio; Mike Schlamp Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? I don't know how the 5000 is affected by a small drop in Vcc, but the K3 3rd order IMD degrades significantly with 1/2 volt drop in the cable. >>> Mike Schlamp 7/10/2008 2:15 PM >>> Does anyone know, when using the built in voltage meter on the 5000A, where in the DC power chain is it taking the reading, and how it is doing that function? That may have some significance in what you see. But using an O-Scope right where the DC power comes into the radio will tell all. Mike W5CUL Robert Cleve wrote: I use an Astron RS-50M DC supply with my 5000A. With 100 watts tune carrier into a dummy load the supply voltage drops from 13.7 to 13.3 DC Volts as seen using the
Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
Jim, on my RS35M (one meter, one switch to choose volts or amps), the screwdriver-adjust pot is on a board bolted to the supply caps. I shorted them several times with power off, and then unbolted the board to gain access to the pot, thoughtfully located on the bottom of the board. But once done, not any problems at all. Carl WC0V W5CUL wrote: > Jim, > > I may have to defer that test for someone else to try tomorrow. Gaining > access to the adjustable pot within the RS35M calls for opening the unit up > (I looked all over the case for access to the pot), and unfortunately I do > not own a variac. Opening the case is not something that I want to tackle > tonight. If no one else tries that test by COB tomorrow, maybe I can borrow > a variable power supply out of the lab over the weekend. > > Thank you, > > Mike > W5CUL > > -Original Message- > From: Jim Lux [mailto:[EMAIL PROTECTED] > Sent: Thursday, July 10, 2008 10:24 PM > To: W5CUL > Cc: [EMAIL PROTECTED]; 'Flexradio' > Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? > > Quoting W5CUL <[EMAIL PROTECTED]>, on Thu 10 Jul 2008 07:29:59 PM PDT: > >> Gerald, >> >> Yes, I understand the relationship between power, voltage, and impedance. >> And I do not disagree that a small voltage drop can affect the radio > during >> transmit, even to the point of causing transmitted distortion. My > question >> regarding where the Vdc reading is being taken from and the methodology > used >> by the on board volt metering system in the 5000A is in response to Robert >> Cleve's observations while testing into a dummy load at 100W; > > > >> All of this seems to point towards a voltage drop along the DC power chain >> starting with the power supply, a larger drop seen across the OEM supplied >> power cable, and another large drop where the built in voltage meter > system >> in the 5000A is taking its reading. > > > Or, there's some weirdness in the measurement system. One way to test it.. > > Hook up your PS and run the radio at low load (idle). Measure the > voltage using the internal system (comparing with your DMM). Change > the supply voltage in small increments. > > That might tell you whether it's a measurement artifact or actually > voltage drop inside the radio. > > (there are conceivable weirdnesses that still could exist...but...) > Jim > > > > ___ > 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] Just how much DC Power Supply sag is acceptable?
That was at the SDR1000 terminals. Carl Ray J wrote: > thats probably wire loss, not your power supply... it needs bigger cables... > Measure voltage at the power supply for a true reading... > > > > Carl Vangsness wrote: >> The >> RS35M will drop from 14.2 to 13.8 under full load (measured with DVM at >> SDR1000 power terminals). I had to open it up to run the output voltage >> up when I first got it. But no problems in that area since installing >> the RS35M. >> >> 73, Carl WC0V >> >> W5CUL wrote: >> >>> Gerald, >>> >>> Yes, I understand the relationship between power, voltage, and impedance. >>> And I do not disagree that a small voltage drop can affect the radio during >>> transmit, even to the point of causing transmitted distortion. My question >>> regarding where the Vdc reading is being taken from and the methodology used >>> by the on board volt metering system in the 5000A is in response to Robert >>> Cleve's observations while testing into a dummy load at 100W; see thread >>> below. He is seeing a .4Vdc drop reported by the 5000A which would seem >>> pretty high given he is using a 50A power supply and is presumably using the >>> appropriate gage cable. I would have suspected that the reading he is >>> seeing may be off a little, which is why I asked the question about the >>> onboard Vdc meter system and suggested using an O-Scope attached to the DC >>> input right at the radio. The other thing that troubles me about Robert's >>> reading is that he reports the Ammeter on his Astron was only showing a 7A >>> draw during his test. Again, I would suspect the meter on the Astron Power >>> Supply is not being entirely accurate as he should be seeing ~20 to 21A draw >>> during a 100W key down. >>> >>> So now Robert's measurements prompted me to look at my 5000A using the on >>> board meter just to see what mine says. Below are the measurements: >>> >>> Idle: 13.8 >>> 5W: 13.7 >>> 10W: 13.6 >>> 20W: 13.6 >>> 50W: 13.5 >>> 75W: 13.5 >>> 100W: 13.4 >>> >>> The above measurements were taken using the built in metering system >>> (CTRL-SHIFT-I), using the Tune function, output power monitored and adjusted >>> using an on off board power meter. The power supply is an Astron RS-35M. >>> Not as beefy as Robert's, but should hold up to a ~20A draw. >>> >>> Here are the same measurements using a DVM connected at the power supply: >>> >>> Idle: 13.87 >>> 5W:13.85 >>> 10W: 13.85 >>> 20W: 13.85 >>> 50W: 13.84 >>> 75W: 13.83 >>> 100W: 13.83 >>> >>> Here are the same measurements using a DVM connected at the radio. Keep in >>> mind that I am only monitoring one of the Vdc lines: >>> >>> Idle: 13.84 >>> 5W:13.77 >>> 10W: 13.75 >>> 20W: 13.73 >>> 50W: 13.68 >>> 75W: 13.66 >>> 100W: 13.63 >>> >>> All of this seems to point towards a voltage drop along the DC power chain >>> starting with the power supply, a larger drop seen across the OEM supplied >>> power cable, and another large drop where the built in voltage meter system >>> in the 5000A is taking its reading. >>> >>> Thank you, >>> >>> Mike >>> W5CUL >>> >>> >>> -Original Message- >>> From: Gerald Youngblood [mailto:[EMAIL PROTECTED] >>> Sent: Thursday, July 10, 2008 4:22 PM >>> To: 'Flexradio'; 'Mike Schlamp' >>> Subject: RE: [Flexradio] Just how much DC Power Supply sag is acceptable? >>> >>> Remember that power is the ratio of voltage squared over impedance. At >>> 13.8V a small voltage difference can make a big effect on PA compression >>> (i.e. distortion). >>> Gerald >>> >>> >>> Gerald Youngblood, K5SDR >>> President >>> FlexRadio Systems >>> 13091 Pond Springs Rd. #250 >>> Austin, TX 78729 >>> Phone: 512-535-4713 >>> >>> -Original Message- >>> From: [EMAIL PROTECTED] >>> [mailto:[EMAIL PROTECTED] On Behalf Of Rob Sherwood >>> Sent: Thursday, July 10, 2008 4:08 PM >>> To: Robert Cleve; Flexradio; Mike Schlamp >>> Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? >>> >>> I don't know how the 5000 is affected by a small drop in Vcc, but the K3 3rd >>> order IMD degrades significantly with 1/2 volt drop in the cable. >>> >>> >> Mike Schlamp <[EMAIL PROTECTED]> 7/10/2008 2:15 PM >>> >> >>> Does anyone know, when using the built in voltage meter on the 5000A, where >>> in the DC power chain is it taking the reading, and how it is doing that >>> function? That may have some significance in what you see. But using an >>> O-Scope right where the DC power comes into the radio will tell all. >>> >>> Mike >>> W5CUL >>> >>> Robert Cleve <[EMAIL PROTECTED]> wrote: >>> I use an Astron RS-50M DC supply with my 5000A. With 100 watts tune >>> carrier into a dummy load the supply voltage drops from 13.7 to 13.3 DC >>> Volts as seen using the radio's cntrl-shift-I window. The Astron's Amp meter >>> shows 7 amps under the 100 watt load and the Astron's Volt meter doesn't >>> budge at all from 14.5 VDC under load. Is this acceptable? I am u
[Flexradio] TX Audio Quality Help, please!
Cecil, You sent:- > Will this oscillation cause my problems? I see > it as TVI/RFI and am awaiting my XYL to return > from work to get her assistance in more testing. Kind Rgds, Gwyn - G4FKH Oscillations are not good at all. You need a better power supply or a lot of work on cleaning that one up. Apprieciate you quick reply and comments. 73's, Gwyn - G4FKH ___ 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] Just how much DC Power Supply sag is acceptable?
The internal DC measurement is not stable enough to use under load. The 0.4V drop during transmit is typical and does not reflect the real drop at the terminals. The internal DC measurement is more of a sanity check accurate to within +/- 1V. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of W5CUL Sent: Thursday, July 10, 2008 9:30 PM To: [EMAIL PROTECTED] Cc: 'Flexradio' Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? Gerald, Yes, I understand the relationship between power, voltage, and impedance. And I do not disagree that a small voltage drop can affect the radio during transmit, even to the point of causing transmitted distortion. My question regarding where the Vdc reading is being taken from and the methodology used by the on board volt metering system in the 5000A is in response to Robert Cleve's observations while testing into a dummy load at 100W; see thread below. He is seeing a .4Vdc drop reported by the 5000A which would seem pretty high given he is using a 50A power supply and is presumably using the appropriate gage cable. I would have suspected that the reading he is seeing may be off a little, which is why I asked the question about the onboard Vdc meter system and suggested using an O-Scope attached to the DC input right at the radio. The other thing that troubles me about Robert's reading is that he reports the Ammeter on his Astron was only showing a 7A draw during his test. Again, I would suspect the meter on the Astron Power Supply is not being entirely accurate as he should be seeing ~20 to 21A draw during a 100W key down. So now Robert's measurements prompted me to look at my 5000A using the on board meter just to see what mine says. Below are the measurements: Idle: 13.8 5W: 13.7 10W: 13.6 20W: 13.6 50W: 13.5 75W: 13.5 100W: 13.4 The above measurements were taken using the built in metering system (CTRL-SHIFT-I), using the Tune function, output power monitored and adjusted using an on off board power meter. The power supply is an Astron RS-35M. Not as beefy as Robert's, but should hold up to a ~20A draw. Here are the same measurements using a DVM connected at the power supply: Idle: 13.87 5W:13.85 10W: 13.85 20W: 13.85 50W: 13.84 75W: 13.83 100W: 13.83 Here are the same measurements using a DVM connected at the radio. Keep in mind that I am only monitoring one of the Vdc lines: Idle: 13.84 5W:13.77 10W: 13.75 20W: 13.73 50W: 13.68 75W: 13.66 100W: 13.63 All of this seems to point towards a voltage drop along the DC power chain starting with the power supply, a larger drop seen across the OEM supplied power cable, and another large drop where the built in voltage meter system in the 5000A is taking its reading. Thank you, Mike W5CUL -Original Message- From: Gerald Youngblood [mailto:[EMAIL PROTECTED] Sent: Thursday, July 10, 2008 4:22 PM To: 'Flexradio'; 'Mike Schlamp' Subject: RE: [Flexradio] Just how much DC Power Supply sag is acceptable? Remember that power is the ratio of voltage squared over impedance. At 13.8V a small voltage difference can make a big effect on PA compression (i.e. distortion). Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Sherwood Sent: Thursday, July 10, 2008 4:08 PM To: Robert Cleve; Flexradio; Mike Schlamp Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable? I don't know how the 5000 is affected by a small drop in Vcc, but the K3 3rd order IMD degrades significantly with 1/2 volt drop in the cable. >>> Mike Schlamp <[EMAIL PROTECTED]> 7/10/2008 2:15 PM >>> Does anyone know, when using the built in voltage meter on the 5000A, where in the DC power chain is it taking the reading, and how it is doing that function? That may have some significance in what you see. But using an O-Scope right where the DC power comes into the radio will tell all. Mike W5CUL Robert Cleve <[EMAIL PROTECTED]> wrote: I use an Astron RS-50M DC supply with my 5000A. With 100 watts tune carrier into a dummy load the supply voltage drops from 13.7 to 13.3 DC Volts as seen using the radio's cntrl-shift-I window. The Astron's Amp meter shows 7 amps under the 100 watt load and the Astron's Volt meter doesn't budge at all from 14.5 VDC under load. Is this acceptable? I am using the standard DC power cable that came with the Flex 5000A. ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex ( http://mail.flex/ )-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail ( http://www.mail/ )-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex ( http://kb.flex/ )-radio.com/ Homepage: http://www.flex ( http:
Re: [Flexradio] TX Audio Quality Help, please!
At 07:54 AM 7/11/2008, you wrote: >However, I did notice a strange occurrence on >the oscolloscope, with the SEC-1223Â keydown >continuous, there was just a voltage drop. But >with the W-30AM, there was oscillation between >the dropped voltage and the full voltage on continuous keydown. > Will this oscillation cause my problems? I see > it as TVI/RFI and am awaiting my XYL to return > from work to get her assistance in more testing. Kind Rgds, Gwyn - G4FKH Oscillations are not good at all. You need a better power supply or a lot of work on cleaning that one up. I keep mentioning that to test the power supply you need a dynamic test not a steady state test because how the power supply reacts to change can be many times worse than the wiring drop, but it seems that the people testing are bent on doing static test which are rather useless in the long run. Forget DVM's they are too slow to see what is going on you need an oscilloscope. You can take a horse to water but . Cecil K5NWA www.softrockradio.org www.qrpradio.com "Blessed are the cracked, for they shall let in the light." ___ 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] [SPAM] what was that new virtual com port program
http://www.eterlogic.com/Products.VSPE.html I'll add it to the KB once it is shown to be a usable alternative by several people using it with success. I just don't have the time to put it through its paces. -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of FireBrick Sent: Friday, July 11, 2008 6:42 AM To: FlexRadio List Subject: [SPAM] [Flexradio] what was that new virtual com port program I have vCom I have com0com There was a mention of another program recently. I thought I'd saved it to a safe place, but as usual can't find it. pse and tu - "Traveling thru hyperspace isn't like dusting crops, boy." - Bill H. in Chicagoland webcams at http://76.16.160.118:8080/ Current Weather at http://hhweather.webhop.org ___ 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/
[Flexradio] TX Audio Quality Help, please!
Dear All, I wonder if someone with more knowledge that I can advise me. My F5K is still away with the supplier but I do have a Yaesu FT100 which requires an external PSU. Obviously I have a PSU especially for that rig, a SEC-1223, it has always been good to me. The PSU that I bought for the F5K was a Watson W-30AM and as the name suggests is 30A continuous and 35A peak. Today I used both a DVM and a oscilloscope to measure the Volts at the PSU. Both showed a small drop when Tx'ing 100W, the SEC-1223 went from 13.89V down to 13.78V a drop of 0.11V, the W-30AM went from 13.63V down to 13.60V a drop of 0.03V. However, I did notice a strange occurrence on the oscolloscope, with the SEC-1223 keydown continuous, there was just a voltage drop. But with the W-30AM, there was oscillation between the dropped voltage and the full voltage on continuous keydown. Will this oscillation cause my problems? I see it as TVI/RFI and am awaiting my XYL to return from work to get her assistance in more testing. Kind Rgds, Gwyn - G4FKH ___ 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] Time for an upgrade!
Hello all, Maybe this comment will help: I have a core 2 duo and a friend of mine has a quad core. Both are new Dell 530's. During SSB transmittion using the 10 band EQ and compander software in PowerSDR his CPU runs at around 10% and mine, with the duo core, runs at 25%. Ciao, Dennis, k0eoo [EMAIL PROTECTED] wrote: > I've been doing some further reading on the subject and I think my original > post is incorrect. The statement about 99% being written to run on one > processor is the most confusing, because it fails to allow for HyperThreaded > single core processors. I am not a programmer, and have waded out past the > shallow end. It should be very easy to test the efficiency with which > PowerSDK deploys 2 cores over a single core. Benchmark a system running a > single core processor with PowerSDK running along with several other > programs that the original poster mentioned that he would like to keep > running, then using a tool like Sysinternal's "Process Explorer", look to > see how balanced the split CPU load percentages stay when PowerSDK is fired > up (while the several other program are already going). I hope this makes > sense. > > > > -Jacky Winters > > > > _ > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Frank Brickle > Sent: Thursday, July 10, 2008 5:48 PM > To: [EMAIL PROTECTED] > Cc: Jim Menefee; flexradio@flex-radio.biz > Subject: Re: [Flexradio] Time for an upgrade! > > > > PowerSDR and DttSP are multithreaded, and have been since Day One. > > 73 > Frank > AB2KT > > On Thu, Jul 10, 2008 at 2:23 PM, <[EMAIL PROTECTED]> wrote: > > You'd think that two processor cores running side by side would surely be > faster than a single core right? And four cores working simultaneously would > certainly run circles around it? Well no, only if the application that you > are running is multithreaded and thus can take advantage of the extra cores > - remember that about 99% of all software available today is programmed to > run on a single core processor. Hence it isn't multithreaded and thus in the > vast majority of cases you won't see a speed up, as the second, third or > fourth core is just sitting there idling, or handling simple operating > system tasks that don't eat up a lot of processing power in the first place. > > Jacky Winters > > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Jim Menefee > Sent: Thursday, July 10, 2008 4:04 PM > To: flexradio@flex-radio.biz > Subject: [Flexradio] Time for an upgrade! > > Time to change the CPU and Mother Board. I have both a SRD 1000 and 5000. I > run a lot of stuff in the background for biz (CS4-Dreamweaver, etc) and use > 4 monitors. I have been eyeing the 6600 CPU's for $189.00 from Tiger > Direct. I would love to hear from others if this is the way to go and a > suggestion of a good Mother Board to go with it. Also, what is the SDR > software designed or best suited for - Duel - Quad, etc? > -- > ___ > 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/ > > > > > -- > "Sapristi nabolis!" -- Count Jim Moriarty > > ___ > 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] what was that new virtual com port program
Never mind, I found it. VSPE - Original Message - From: FireBrick To: FlexRadio List Sent: Friday, July 11, 2008 5:41 AM Subject: [Flexradio] what was that new virtual com port program I have vCom I have com0com There was a mention of another program recently. I thought I'd saved it to a safe place, but as usual can't find it. pse and tu - "Traveling thru hyperspace isn't like dusting crops, boy." - Bill H. in Chicagoland webcams at http://76.16.160.118:8080/ Current Weather at http://hhweather.webhop.org ___ 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/
[Flexradio] what was that new virtual com port program
I have vCom I have com0com There was a mention of another program recently. I thought I'd saved it to a safe place, but as usual can't find it. pse and tu - "Traveling thru hyperspace isn't like dusting crops, boy." - Bill H. in Chicagoland webcams at http://76.16.160.118:8080/ Current Weather at http://hhweather.webhop.org ___ 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/
