Re: [Elecraft] [K3] Magic CW box and PIC programming
Seems like a perfect box for W4TV's solutions (may be contact him directly?) btw: Any luck with the HW8? :-) 73' Paul PD0PSB PA3CW wrote: Hi All, I still walk around with my idea of building a little box with 6 to 8 stereo jacks on the front and one or two outputs to key-in to tranceiver(s). The idea is that everybody wires a key or paddle differently. (straight key to tip, sleeve or both; single paddle to tip, sleave or both; double paddle left to tip right to sleeve or just other way around)? The idea is to plug in the key or paddle, push key down for a sec or tip paddle left-right and the little box automatically discovers how the input is wired. All inputs are matched to the respective outputs without having to take a soldering iron. My idea is to program this in PIC buti am no PIC programmer. Bought a compiler but was very disencouraged after printing centimeters of manual. Maybe PIC expeter CW operators on the line? Let me know your thoughts Thanks, Dick PA3CW -- View this message in context: http://n2.nabble.com/Magic-CW-box-and-PIC-programming-tp3978221p3978288.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] K2 KIO2 Polling Noise in PC Speakers w/ HRD
N5BCN wrote: I recently completed the KIO2 module (without KPA100) and have been controlling the K2 via HRD v5.0. I'm passing the K2 audio via the K2 EXT SPKR connection to the PC Mic In and finally out to PC Speakers. It's curious that you're getting this using both a real serial port and a USB adapter. I wonder if you're hearing PC bus noise that is being picked up by the computer? Most of us would be blissfully unaware of this since we don't listen to our radios through the computer. But it could explain why many people claim they get better decoding after switching to an external sound card box like a RigExpert or MicroHam. Is the noise present when listening to a different audio source (e.g. internet radio) while HRD is polling the K2? - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/K2-KIO2-Polling-Noise-in-PC-Speakers-w-HRD-tp3978029p3978590.html Sent from the [K2] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Magic CW box and PIC programming
Wouldn't a small break-out box type device with a couple of computer-style jumpers be the easiest solution? - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/Magic-CW-box-and-PIC-programming-tp3978221p3978598.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Clean or replace AF Gain control?
Perhaps because it was many years before i got round to doing the wiring modification, my K2 volume control remained scratchy even after I did the modification. It's only noticeable when turning the control, though, so I decided I would live with it rather than attempt a replacement. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/K2-Clean-or-replace-AF-Gain-control-tp3977367p3978615.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: new feature idea / question
Brian Machesney wrote: I was just reading about the differing levels of success that people have with active noise cancelling units. It occurred to me that one should be able to achieve the same kinds of results using the second RX and separate antenna in the K3 - with the addition of control over the phase (delay) of the arriving signal. On its face, it would seem that one could achieve destructive interference between the noise only coming from a sense antenna and the noise + signal coming from a better receive antenna. I own one of those units. One thought that immediately springs to mind is that you need at least two extra controls, preferably three, one to vary the phasing of the two signals and the others to adjust the amplitude of the two inputs so that the noise levels cancel exactly. The K3 has no provision for these controls. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/K3-new-feature-idea-question-tp3977080p3978631.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 power down problem
Hi all, For some reason my K3 will not switch off this morning. I hit the power off button and it powers down and starts again immediately. Obviously it goes off when I power the PSU down but it is somewhat annoying. I have reinstalled the firmware in case of corruption but have not as yet done a full reset. Any ideas? 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC HB9DRV-9 DX Clusters Member RSGB, GQRP 9838, FISTS 14077 | K3 #455 http://www.amateurradiotraining.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 power down problem
Hi Ian, Have a look at the KPA3 12V Sense Mod on the modification page. It maybe the answer to your prayers. 73 Stewart G3RXQ On Tue, 10 Nov 2009 10:49:03 +, Ian Maude wrote: Hi all, For some reason my K3 will not switch off this morning. I hit the power off button and it powers down and starts again immediately. Obviously it goes off when I power the PSU down but it is somewhat annoying. I have reinstalled the firmware in case of corruption but have not as yet done a full reset. Any ideas? 73 Ian __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: new feature idea / question
A good thought Brian. My experience of two such noise cancelling devices is that, depending on the type and direction of the noise, they can be very effective in improving the signal/noise ratio although there is some insertion loss so weak signals are sometimes lost. I always have one connected to the K3 for use as needed. As I understand it the phase delay of the signal from the noise antenna and its mixing with the signal from the main antenna needs to take place before the signal gets to the receiver, so, with an external device at least, two receivers are not needed. However, I have been surprised for some years that no rig manufacturers build such a feature in. Perhaps it could somehow be done with firmware in the K3 using, say, the RX ANT or the AUX input for the noise antenna? 73 to all Geoff G3UCK - Original Message - From: Brian Machesney nekvts...@gmail.com Subject: [Elecraft] K3: new feature idea / question I was just reading about the differing levels of success that people have with active noise cancelling units. It occurred to me that one should be able to achieve the same kinds of results using the second RX and separate antenna in the K3 - with the addition of control over the phase (delay) of the arriving signal. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Main tuning knob rough
I just noticed a problem with the main tuning knob on my K3 #1516 this morning. I noticed it when I was tuning around using the finger dimple. The odd thing is it only feels rough when you turn the knob counter-clockwise while applying slight pressure to facilitate using the finger dimple. I took the knob off, repositioned it(making sure it was clear of the front panel and not crooked, it wasn't) and still have the problem. It is bad enough that after several turns it causes the rotation to stick. Once again this only happens when turning counter-clockwise, with slight finger pressure in the dimple. What I find interesting is that I hardy use the tuning knob as I use an LP-Pan with PowerSDR and tune around with a mouse. I get the feeling that the problem is with the VFO A encoder. Any ideas? 73 Jeff kb2m __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: new feature idea / question
Smart thinking! Though using two receivers for this may be quite difficult to implement. They have to be *exactly* identical to obtain phase cancellation. That means AGC timing, roofing filter ripple, signal path gains, everything. I think this will be hard with the K3 and SubRX. The outboard noise-cancellation boxes have a much shorter/simpler and wider signal path, making cancellation easier. It may also be a better place to do this at the front-end and not at the back-end of a receiver. It would be a nice experiment though! How about just phase reverting the SubRX audio temporarily and give it a try? 73' Paul PD0PSB Brian Machesney wrote: I was just reading about the differing levels of success that people have with active noise cancelling units. It occurred to me that one should be able to achieve the same kinds of results using the second RX and separate antenna in the K3 - with the addition of control over the phase (delay) of the arriving signal. On its face, it would seem that one could achieve destructive interference between the noise only coming from a sense antenna and the noise + signal coming from a better receive antenna. Thoughts? -- 73 -- Brian -- K1LI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://n2.nabble.com/K3-new-feature-idea-question-tp3977080p3979212.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 power down problem
Mod done, still the same! Odd that it should just appear after all this time. 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC HB9DRV-9 DX Clusters Member RSGB, GQRP 9838, FISTS 14077 | K3 #455 http://www.amateurradiotraining.org 2009/11/10 Stewart stew...@baker.nildram.co.uk Hi Ian, Have a look at the KPA3 12V Sense Mod on the modification page. It maybe the answer to your prayers. 73 Stewart G3RXQ On Tue, 10 Nov 2009 10:49:03 +, Ian Maude wrote: Hi all, For some reason my K3 will not switch off this morning. I hit the power off button and it powers down and starts again immediately. Obviously it goes off when I power the PSU down but it is somewhat annoying. I have reinstalled the firmware in case of corruption but have not as yet done a full reset. Any ideas? 73 Ian __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 power down problem
Ian, It sounds like something is activating the Remote Power On. Do you have anything plugged into the ACC connector? Check it to see if pin 8 is being shorted to ground. 73, Don W3FPR Ian Maude wrote: Mod done, still the same! Odd that it should just appear after all this time. 73 Ian __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: new feature idea / question
G4ILO said you need at least two extra controls, preferably three, one to vary the phasing of the two signals and the others to adjust the amplitude of the two inputs so that the noise levels cancel exactly. Sounds like a description of the DX Engineering NCC-1 http://www.dxengineering.com/Parts.asp?ID=1227PLID=215SecID=114DeptID=12PartNo= DXE%2DNCC%2D1 Its expensive but if nothing else the manual is worth a read http://www.dxengineering.com/pdf/NCC-1%20Rev%203.pdf Trevor G0KTN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RFI
I thought my microKEYER was guilty of RFI but it turned out that the audio patch cables for line in and line out had a less than 10% shield. I temporarily solved the problem with ferrite but a more permenant solution will be RG-58au. Then I lost microphone audio and just got a buzz. I removed the RJ-45 connector from the back of the MK and plugged it back in. Problem gone. Self cleaning contacts are great but you have to activate them. -Robby VY2SS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: new feature idea / question
Brian Machesney wrote: I was just reading about the differing levels of success that people have with active noise cancelling units. It occurred to me that one should be able to achieve the same kinds of results using the second RX and separate antenna in the K3 - with the addition of control over the phase (delay) of the arriving signal. I believe it should be possible also since the K3 and KRX3 are virtually identical (as required for diversity). Any gain difference could be compensated using the separate RF Gain controls, but phase differences would require some sort of control knob, which is in short supply on the K3 front panel. It's simple to do this with an external unit like the MFJ-1025 which is the way I'm heading. DXE also has a much more expensive unit (NCC-1) but the 1025 can be modified to make it similar (except for strong signal performance). I've done all the W8JI modifications below (excluding the filter modifications) and I also added impedance converters for the two inputs. For some reason both inputs on my 1025 show input impedance on 160m of ~160 ohms, so I added 2:1 transformer inputs to get ~80 ohms on both parallel F-connector inputs (another mod). I'll be using two identical Beverages staggered ~1/4 wl and spaced ~1/8 wl apart, each matched to 75 ohms. I was concerned about possible reflection issues if the Beverages saw 150 ohms looking back into the 1025. http://www.w8ji.com/mfj-1025_1026.htm Once the crops are out of the field where I plan to install this I'll try to report back on how it's working. 73, Bill -- View this message in context: http://n2.nabble.com/K3-new-feature-idea-question-tp3977080p3980098.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 power down problem
No, nothing plugged in there. 73 Ian 2009/11/10 Don Wilhelm w3...@embarqmail.com Ian, It sounds like something is activating the Remote Power On. Do you have anything plugged into the ACC connector? Check it to see if pin 8 is being shorted to ground. 73, Don W3FPR Ian Maude wrote: Mod done, still the same! Odd that it should just appear after all this time. 73 Ian __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Audio Pops
I used my K3 for the first time in a really serious contest for SS CW. The performance was astounding. This is the first receiver I have EVER had that would let me put a S9 +40dB signal just on the edge of the filter and then copy signals in the filter passband clear down to the noise floor with no problem at all. However, I did notice at times that there were a good many loud pops that appeared in the audio, seemingly at random. These pops were really LOUD, but fortunately very brief (maybe just a few milliseconds in duration). Since the pops were so much louder than the normal audio, I can't say for sure that their level changed with the audio gain setting. They sounded to me like DSP artifacts, as if the audio D/A was being driven to the top of its range for short periods. I wasn't able to really correlate these pops with anything I was hearing within in the receiver passband. During one run period on 40 meters the pops were especially frequent, coming every few seconds. Probably not coincidentally there was a nearby station who had some rather prominent key clicks, and I'm guessing the combination of his key clicks and local QRN spikes were aggravating whatever mechanism is responsible for the pop generation. The pops were encountered in plain vanilla receive mode, no NB or NR and mostly with the default 400 Hz DSP bandwidth behind an 8-pole 400 Hz 1st IF filter, QSK on. I'm running the latest public beta firmware (MCU 3.52, DSP 2.43). If it makes any difference, I do have my radio set to select the 400 Hz roofing filter when the BW is dialed to 500 Hz rather than the default 400 Hz. I heard the pops using either of two kinds of high impedance headphones, Sony MD-7506 (63 Ohms) and Extreme Isolation EX-29 (32 Ohms). Has anyone else encountered this phenomenon? 73... Randy, W8FN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Audio Pops
You need rev 3.57, presently in field test. 73, Wayne N6KR http://www.elecraft.com On Nov 10, 2009, at 7:04 AM, Randy Farmer w...@tx.rr.com wrote: I used my K3 for the first time in a really serious contest for SS CW. The performance was astounding. This is the first receiver I have EVER had that would let me put a S9 +40dB signal just on the edge of the filter and then copy signals in the filter passband clear down to the noise floor with no problem at all. However, I did notice at times that there were a good many loud pops that appeared in the audio, seemingly at random. These pops were really LOUD, but fortunately very brief (maybe just a few milliseconds in duration) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 power down problem
Yep as per my thread, I did it but still the same issue. I cannot imagine that was the issue though on #455 after all this time. 73 Ian 2009/11/10 Greg - AB7R a...@cablespeed.com This is the mod description from the website: This modification adds a diode to the KPA3 12V sense circuit to hold the voltage to no more than 0.6V when the K3 is turned off. Without it, some K3s refuse to turn off when the POWER button is tapped because the 12V sense circuit does not drop to a low enough level to shut down the K3’s MCU. The diode is a common leaded part. No work with SMDs is required. A minimum of disassembly is required and no boards need be removed to perform this modification. - 73, Greg - AB7R Whidbey Island WA NA-065 On Tue Nov 10 2:49 , Ian Maude i...@gb7mbc.net sent: Hi all, For some reason my K3 will not switch off this morning. I hit the power off button and it powers down and starts again immediately. Obviously it goes off when I power the PSU down but it is somewhat annoying. I have reinstalled the firmware in case of corruption but have not as yet done a full reset. Any ideas? 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC HB9DRV-9 DX Clusters Member RSGB, GQRP 9838, FISTS 14077 | K3 #455 http://www.amateurradiotraining.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: Elecraft@mailman.qth.net','','','')Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] K2 KIO2 Polling Noise in PC Speakers w/ HRD
Hi Julian, I suspect that might be the case. At first, I thought it was a problem with the fact the soundcard is right next to the PCI card with the DB9 connector. But after connecting the KIO2 cable to a USB/Serial adapter that isn't anywhere near the soundcard, it suggested something internal to the computer is being picked up by the soundcard. I'll try Don's suggestion of connecting the K2 and computer chassis together and see if that makes a difference. Brian N5BCN Julian, G4ILO wrote: N5BCN wrote: I recently completed the KIO2 module (without KPA100) and have been controlling the K2 via HRD v5.0. I'm passing the K2 audio via the K2 EXT SPKR connection to the PC Mic In and finally out to PC Speakers. It's curious that you're getting this using both a real serial port and a USB adapter. I wonder if you're hearing PC bus noise that is being picked up by the computer? Most of us would be blissfully unaware of this since we don't listen to our radios through the computer. But it could explain why many people claim they get better decoding after switching to an external sound card box like a RigExpert or MicroHam. Is the noise present when listening to a different audio source (e.g. internet radio) while HRD is polling the K2? -- View this message in context: http://n2.nabble.com/K2-KIO2-Polling-Noise-in-PC-Speakers-w-HRD-tp3978029p3980597.html Sent from the [K2] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Magic CW box and PIC programming
-Oorspronkelijk bericht- Van: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] Namens PA3CW Verzonden: dinsdag 10 november 2009 8:48 Aan: elecraft@mailman.qth.net Onderwerp: [Elecraft] [K3] Magic CW box and PIC programming Hi Dick, You can 'PIC' just about anything. But in this case I will change the connection of a few wires if necessary using a soldering iron. Simple solution for a simple problem. 73 Arie PA3A - I still walk around with my idea of building a little box with 6 to 8 stereo jacks on the front and one or two outputs to key-in to tranceiver(s). The idea is that everybody wires a key or paddle differently. (straight key to tip, sleeve or both; single paddle to tip, sleave or both; double paddle left to tip right to sleeve or just other way around)? Let me know your thoughts Thanks, Dick PA3CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RFI
On Tue, 10 Nov 2009 10:29:39 -0400, robby robertson wrote: I thought my microKEYER was guilty of RFI but it turned out that the audio patch cables for line in and line out had a less than 10% shield. I temporarily solved the problem with ferrite but a more permenant solution will be RG-58au. Your assessment of the problem is wrong. The problem is NOT shielding of the cable, it is either a pin 1 problem in the equipment one end or the other of that cable or RESISTANCE in the cable shield. There are two possible fixes for a pin 1 problem, one of which you found. The other fix is to rewire the defective equipment to eliminate the pin 1 problem. Both pin 1 problems and shield resistance couple shield CURRENT into equipment. A ferrite reduces RF shield current. If it's resistance, RG58 with a robust copper braid shield will help because it has less resistance, not because it's better shielded. If it's a pin 1 problem, it won't help. Another point. That cable is acting as a receive antenna. Changing the length (or orientation) of ANY antenna can change its behavior. For a tutorial on all of this see http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim Brown K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: CW weak signal
When on low bands, weak signal, rf gain cranked up, narrow CW bandwidth, I get a bit of continuous howling effect from the white noise/QRN that is about the same audio freq as the signal I am copying. I have .2 khz, 5 pole -.94 crystal. I have always just ignored it, turning rf gain down helps a bit - very critical. But I started thinking maybe others have found some good techniques to minimize this. As I write this I think I may experiment with the boost I give for this crystal. Wondering if 8 pole crystals sound diferent. Any suggestions? Ken K5WK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Magic CW box and PIC programming
I agree Arnie, if I'm setting up stuff to operate in my own shack. However, if I wanted to be able to use my rig with various other people's keys an easy-to-configure interface box would be very attractive. I would opt for a box with the connectors Dick mentions, but with a few mini toggle switches to make the connections to the various outputs to the rigs as needed. Guess that's the difference in outlook between hardware types like me and software types, Hi! Ron AC7AC -Oorspronkelijk bericht- Hi Dick, You can 'PIC' just about anything. But in this case I will change the connection of a few wires if necessary using a soldering iron. Simple solution for a simple problem. 73 Arie PA3A - I still walk around with my idea of building a little box with 6 to 8 stereo jacks on the front and one or two outputs to key-in to tranceiver(s). The idea is that everybody wires a key or paddle differently. (straight key to tip, sleeve or both; single paddle to tip, sleave or both; double paddle left to tip right to sleeve or just other way around)? Let me know your thoughts Thanks, Dick PA3CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: CW weak signal
Hi Ken, For narrow DSP filter bandwidths (100 Hz or less I think) you have the option of using a FIR filter (default) or an IIR filter. IIR filters can ring which sounds like it might be what you are experiencing. That may be your problem - that you are using an IIR filter. You can toggle between the FIR and IIR filters by a CONFIG command; CONFIG-FLx BW (then tap 7). (See page 55 of the K3 manual under FLx BW.)Hope that helps. 73, Ted, W2ZK Kenneth Waites wrote: When on low bands, weak signal, rf gain cranked up, narrow CW bandwidth, I get a bit of continuous howling effect from the white noise/QRN that is about the same audio freq as the signal I am copying. I have .2 khz, 5 pole -.94 crystal. I have always just ignored it, turning rf gain down helps a bit - very critical. But I started thinking maybe others have found some good techniques to minimize this. As I write this I think I may experiment with the boost I give for this crystal. Wondering if 8 pole crystals sound diferent. Any suggestions? Ken K5WK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 power down problem
I had one of my K3's develop a similar fault. In my case it was a failure of Q2 (FDS6375, RF board) which is the power switching FET. elecraft spares sent me out one and I had it in a few days An IRF7416QPBF might be a junkbox replacement if you are very impatient! it's pretty easy to get at On Tue, 2009-11-10 at 13:05 +, Ian Maude wrote: Mod done, still the same! Odd that it should just appear after all this time. 73 Ian -- 73 Brendan EI6IZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: CW weak signal
For narrow DSP filter bandwidths (100 Hz or less I think) you have the option of using a FIR filter (default) or an IIR filter. IIR filters can ring which sounds like it might be what you are experiencing. The use of IIR filters is deprecated. The K3 defaults to FIR filters and we encourage you to use them. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Audio Pops
Randy Experienced the same symptoms in SS CW. Random intermittent loud pops with no NB/NR on. Never did figure it out but a bit of RF gain adjust seemed to help. It does wake you up if you have the AF gain high. Steve, N8BJQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] OT: Items For Sale
I'm doing a little shack cleaning and have a few items that are surplus to my needs. I am offering them here before I put them on that auction site. Elecraft KRC2 Band Decoder - $140 Assembled and tested but never used Includes uninstalled parts for the ACC option Elecraft T1 20W Automatic Antenna Tuner - $110 Assembled, tested and used twice Works great with all those single band QRP rigs NorCal QRP Power/SWR Meter Kit - $75 Unbuilt kit, still in original box 0 - 9.9 Watts, LCD display plus analog meter Full description here: http://www.norcalqrp.org/ncpowermeter.htm MFJ-868 Giant SWR/Wattmeter HF(20W,200W,2KW) - $110 Less than 1 year old Modified with Power-on indicator and switch to turn panel lamps on/off. Works great, just too big for my small shack. Full description here: http://www.mfjenterprises.com/Product.php?productid=MFJ-868 ATMEL 8-bit RISC Microcontroller Development Kit - $125 ATSTK500 - Development board for 8 to 40 pin microprocessors ($79 New) ATSTK502 - Expansion Board for 64 pin microprocessors with LCD support ($99 New) Includes one AT90S8515 40-pin chip and one ATMEGA169L 64-pin chip These boards have had very little use. Will throw in an AVR Butterfly. ($20 New) Full descriptions here: http://www.atmel.com/dyn/products/tools_card.asp?tool_id=2735 (ATSK500) http://www.atmel.com/dyn/products/tools_card.asp?tool_id=2906 (ATSK502) http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3146 (AVRBFLY) All prices shipped USA only. If interested contact me off list: dwines at suddenlink dot net. Don, K5DW K1 #123, K2 #789, K3 #123 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] LP unit
I have a brand new in the box with a serial number in the 39X range along with the CD to part with. I'm never going to get around to using it so someone else might wish to have it. IIRC it should be worth $295. It was not the kit option but factory assembled. II have to many projects setting here as it is. This came along with my K3 when i bought it and other than thinking about it, well that's as far as it's gone. That price is shipped to you Priority mail or UPS or Fed Ex or? Hope this fits in with the list requirements. Larry W0OGH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RFI
Thanks for the info Jim. I already have that document on my computer and it is impressive to say the least and I really am going to read it someday however I don't see myself launching into an exhaustive research project when I can make the problem go away easily. I have no idea what a pin 1 problem is but whatever it was, the problem is . . . . . gone. 73, -Robby __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: CW weak signal
I don't quite understand that - is there some option which allows you to choose? 73 de M0XDF, K3 #174 On 10 Nov 2009, at 18:24, Lyle Johnson wrote: For narrow DSP filter bandwidths (100 Hz or less I think) you have the option of using a FIR filter (default) or an IIR filter. IIR filters can ring which sounds like it might be what you are experiencing. The use of IIR filters is deprecated. The K3 defaults to FIR filters and we encourage you to use them. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Magic CW box and PIC programming
No PIC or microcontroller routine is going to be able to distinguish between paddles with the left paddle connected to the tip and those with the right paddle connected to the tip. I agree with Ron, build a box with two toggle switches (or sets of jumpers) per jack: 1) a DPDT switch to reverse tip and ring, This handles the left/right paddle on tip and straight key on the ring issues 2) a SPDT switch to connect the ring through or to the sleeve (ground). This handles straight keys using a mono plug or straight keys connected between tip and ring. These two switches (with a stereo input jack and a stereo plug to the rig or keyer) handle any possible combination of key and connections I can imagine. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau Claire Sent: Tuesday, November 10, 2009 12:39 PM To: 'Arie Kleingeld PA3A'; elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Magic CW box and PIC programming I agree Arnie, if I'm setting up stuff to operate in my own shack. However, if I wanted to be able to use my rig with various other people's keys an easy-to-configure interface box would be very attractive. I would opt for a box with the connectors Dick mentions, but with a few mini toggle switches to make the connections to the various outputs to the rigs as needed. Guess that's the difference in outlook between hardware types like me and software types, Hi! Ron AC7AC -Oorspronkelijk bericht- Hi Dick, You can 'PIC' just about anything. But in this case I will change the connection of a few wires if necessary using a soldering iron. Simple solution for a simple problem. 73 Arie PA3A - I still walk around with my idea of building a little box with 6 to 8 stereo jacks on the front and one or two outputs to key-in to tranceiver(s). The idea is that everybody wires a key or paddle differently. (straight key to tip, sleeve or both; single paddle to tip, sleave or both; double paddle left to tip right to sleeve or just other way around)? Let me know your thoughts Thanks, Dick PA3CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: CW weak signal
Hello David! I don't quite understand that - is there some option which allows you to choose? Yes, please see page 24 of the manual Narrow DSP FIlter Types for details. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: new feature idea / question
Brian Machesney wrote: I was just reading about the differing levels of success that people have with active noise cancelling units. It occurred to me that one should be able to achieve the same kinds of results using the second RX and separate antenna in the K3 - with the addition of control over the phase (delay) of the arriving signal. FYI the Flex 5000 has this capability now and may be slightly ahead of the K3's implementation of diversity. They added the ability to adjust phase as well as amplitude differences between the two channels. This is exactly the capability Brian is asking for above. http://w9oy-sdr.blogspot.com/2009/07/more-diversity.html Above is the latest polar control for the diversity project. The control allows you to adjust phase and gain between 2 antennas and 2 receivers in the F5K. Here is a shot of the F5K with diversity active Hoping this friendly competition will eventually inspire Elecraft to do something similar! :-) I'm betting it will...maybe using the P3 display. 73, Bill -- View this message in context: http://n2.nabble.com/K3-new-feature-idea-question-tp3977080p3982322.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] change call sign
Elecraft, how would I go about changing a call sign into the k3 ? I have recently downloaded the latest software (beta) dated 10/23/09 and can no longer find config.banner in the menu's k3 427 Mark --WIVJ Regards, Mark W. Crossland 508 693 508 693 7888(fax) www.crosslandlandscape.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] change call sign
Elecraft, how would I go about changing a call sign into the k3 ? I have recently downloaded the latest software (beta) dated 10/23/09 and can no longer find config.banner in the menu's k3 427Mark --WIVJ Use K3 Utility. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 changing split?
Many thanks to all the folk who kindly replied to my query about the K3 changing its split status. I believe (but am not yet sure) that the problem may well have arisen from the use of a macro using the SWH13 command. Thanks in particular to Joe, W4ZV for his versions of the split cleanup macros. 73 Chris, M0PSK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 changing split?
Hi Chris: Now that we have the ability to do our own programming we also need some volunteer macro beta testers. 73, Mike K2MK Chris M0PSK Tue, 10 Nov 2009 12:53:02 -0800 Many thanks to all the folks who kindly replied to my query about the K3 changing its split status. I believe (but am not yet sure) that the problem may well have arisen from the use of a macro using the SWH13 command. Thanks in particular to Joe, W4ZV for his versions of the split cleanup macros. 73 Chris, M0PSK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: CW weak signal
On Tue, 2009-11-10 at 10:24 -0800, Lyle Johnson wrote: The use of IIR filters is deprecated. The K3 defaults to FIR filters and we encourage you to use them. For some conditions the slight ringing with the IIR filters can be a real help, a bit like the effect that you can induce on some rigs with a narrow APF filter. I find that the IIR filters are often better than the FIR filters for moderate speed CW on a very noisy band like 160m. They may not be the best all-round choice but they do have their good points. -- 73 Brendan EI6IZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Marco ant1 vfo A/ ant2 vfo B
Hi I like to use VFO A on 40 meters with ANT 1 connected. And the second (on the sub) VFO B on 80 meters with ANT 2. How will a macro looks to programm a PF switch to make a quick band change tot swap B to A with the correct antenna? Peter __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 signal tracing progress and questions arising
Hi all, Progressing with fault finding the K2 and there are some immediate apparent issues. Firstly there is a lot of loss through the low pass filters on receive (on 30m at least) - 3dB when the actual loss should be negligible. That's obviously one place I need to look. However (weird one this) the output measured from the bandpass filters is higher than the input. On my scope I'm measuring 78mV pk to pk on the input and 135mV pk to pk on the output of the filters at the junction of D6 and D7 which is clearly not what is expected (unless this particular K2 has somehow broken the laws of physics). I'm wondering if it's possible that something in the transmit chain is active? I have checked the 8T and 8R voltages and they are OK. Downstream of D6 losses seem comparable with the Signal tracing checklist until I get to the composite mixer where everything takes a dive down (another area to check). Any thoughts on the bandpass filter issue? Cheers, Paul. -- View this message in context: http://n2.nabble.com/K2-signal-tracing-progress-and-questions-arising-tp3982841p3982841.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Magic CW box and PIC programming
Of course it is possible to distinguish between dot left or right. My idea is: press the P (program button) on the magic box, then sequence key the paddle with dot button first then dah button. The pic can read the sequence and decide which one is dot and which one is dah, in other words, shoud the input be connected to the output 1 to one or should the wires be crossed? It is fun to design such a box with logic inside. Easy to do with switches, but that is not the idea. Just plug in, pres the P button and key down a straight key or paddle dit dah. The box recognizes the contacts and connects to the output accordingly ;). Dick PA3CW Joe Subich, W4TV-4 wrote: No PIC or microcontroller routine is going to be able to distinguish between paddles with the left paddle connected to the tip and those with the right paddle connected to the tip. I agree with Ron, build a box with two toggle switches (or sets of jumpers) per jack: 1) a DPDT switch to reverse tip and ring, This handles the left/right paddle on tip and straight key on the ring issues 2) a SPDT switch to connect the ring through or to the sleeve (ground). This handles straight keys using a mono plug or straight keys connected between tip and ring. These two switches (with a stereo input jack and a stereo plug to the rig or keyer) handle any possible combination of key and connections I can imagine. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau Claire Sent: Tuesday, November 10, 2009 12:39 PM To: 'Arie Kleingeld PA3A'; elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Magic CW box and PIC programming I agree Arnie, if I'm setting up stuff to operate in my own shack. However, if I wanted to be able to use my rig with various other people's keys an easy-to-configure interface box would be very attractive. I would opt for a box with the connectors Dick mentions, but with a few mini toggle switches to make the connections to the various outputs to the rigs as needed. Guess that's the difference in outlook between hardware types like me and software types, Hi! Ron AC7AC -Oorspronkelijk bericht- Hi Dick, You can 'PIC' just about anything. But in this case I will change the connection of a few wires if necessary using a soldering iron. Simple solution for a simple problem. 73 Arie PA3A - with 6 to 8 stereo jacks on the front and one or two outputs to key-in to tranceiver(s). The idea is that everybody wires a key or paddle differently. (straight key to tip, sleeve or both; single paddle to tip, sleave or both; double paddle left to tip right to sleeve or just other way around)? Let me know your thoughts Thanks, Dick PA3CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://n2.nabble.com/Magic-CW-box-and-PIC-programming-tp3978221p3982941.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 signal tracing progress and questions arising
Paul, My only thought on the bandpass filter weirdness is that either the bandpass filter is not properly terminated at the D6/D7 junction, or that your 'scope probe is picking up something extraneous - change the routing of the ground on the 'scope probe and see if there is any change. Your signal generator level may be too low to exclude extraneous noise pickup from consideration. Do you have a QRP transmitter that you can feed into a dummy load and use a pickup wire or coil positioned to provide input to the K2? You might try using that as your signal generator (use your 'scope to check the level into a 50 ohm resistor before connecting to the K2) - the level of the test generator shown in the K2 manual is to be adjusted to 0.14 volts RMS (about 400 mV peak to peak). The K2 will not be damaged with that level. If the signal drops drastically at the mixer, it could be related to the above, or you may not have adequate oscillator injection from the VFO. The mixer needs a +7 dBm level at the LO port (500 mV RMS or 1.4 volts peak to peak) - all the mixer ports are 50 ohms. 73, Don W3FPR Paul Fletcher wrote: Hi all, Progressing with fault finding the K2 and there are some immediate apparent issues. Firstly there is a lot of loss through the low pass filters on receive (on 30m at least) - 3dB when the actual loss should be negligible. That's obviously one place I need to look. However (weird one this) the output measured from the bandpass filters is higher than the input. On my scope I'm measuring 78mV pk to pk on the input and 135mV pk to pk on the output of the filters at the junction of D6 and D7 which is clearly not what is expected (unless this particular K2 has somehow broken the laws of physics). I'm wondering if it's possible that something in the transmit chain is active? I have checked the 8T and 8R voltages and they are OK. Downstream of D6 losses seem comparable with the Signal tracing checklist until I get to the composite mixer where everything takes a dive down (another area to check). Any thoughts on the bandpass filter issue? Cheers, Paul. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.704 / Virus Database: 270.14.59/2494 - Release Date: 11/10/09 02:38:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] K3 Auto Notch distortion
I have noticed with the last few Beta updates that I'm hearing distortion now with the Auto Notch engaged. I never heard that with the earlier versions. Is anyone else noticing this or am I hearing things besides the usual voices in my head? If so I'm guessing a change to a more aggressive auto notch must have happened somewhere? 73 Bill nz0t -- View this message in context: http://n2.nabble.com/K3-Auto-Notch-distortion-tp3983560p3983560.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] K3 Auto Notch distortion
I also hear distortion with auto notch engaged, If I use manual notch there is no distortion. Phil K8MBY - Original Message - From: NZ0T n...@cox.net To: elecraft@mailman.qth.net Sent: Tuesday, November 10, 2009 7:29 PM Subject: [Elecraft] [K3] K3 Auto Notch distortion I have noticed with the last few Beta updates that I'm hearing distortion now with the Auto Notch engaged. I never heard that with the earlier versions. Is anyone else noticing this or am I hearing things besides the usual voices in my head? If so I'm guessing a change to a more aggressive auto notch must have happened somewhere? 73 Bill nz0t -- View this message in context: http://n2.nabble.com/K3-Auto-Notch-distortion-tp3983560p3983560.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 A/B button problem
I'm seeing an intermittent problem with the A/B button on my K3. When I have VFO A and B set for different modes and frequencies, pressing the A/B button sometimes copies the frequency from VFO B to A after exchanging them, rather than exchanging them only (the mode is not copied). The problem never occurs when the mode is the same between the two VFO's. Has anyone else observed this? Does the fact that the problem does not occur when the modes are the same, imply that this is a firmware rather than hardware issue? My K3 does not have the subreceiver. Steve N9SZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] What happened?
Well, here I go again with a probably stupid question but that is my nature. I happened to notice that the K-3 utility has a number of features grayed out including all of the configuration menu options. I can neither see what's on there or make any adjustments. I have the latest firmware installed and this is the first time I noticed that this has apparently changed. Has anybody else experienced this situation? Bruce-W8FU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] What happened?
I happened to notice that the K-3 utility has a number of features grayed out including all of the configuration menu options. Be sure you have the latest version of K3 Utility. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] What happened?
I happened to notice that the K-3 utility has a number of features grayed out including all of the configuration menu options. Be sure you have the latest version of K3 Utility. And that the K3 is communicating with Utility... 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 A/B button problem
I found that the problem was caused by PowerSDR software running for my LP-PAN panadapter. Steve N9SZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now available. This revision includes Synchronous AM detection, which has a clear advantage over the regular AM detector during selective fading. In this mode, the K3 can optionally track AM stations that may be slightly mistuned, as you might find in an AM round-table on 75 m. It's also convenient for automatically zeroing in on AM broadcast stations. There are other considerations when using Synch AM, so you should read the release notes (below) before trying it. We'll be further refining our AM-S implementation in a later release, based on your feedback. Please send any questions to k3supp...@elecraft.com. For instructions on how to load beta firmware, see: http://www.elecraft.com/K3/k3_software.htm 73, Wayne N6KR * * * MCU 3.57 / DSP 2.45, 11-7-2009 Misc. Improvements: * TUNE SWITCH: “Double beep” with NR on eliminated. * DATA A: Loss of power when using TUNE corrected. New Feature: Synchronous AM Receive * SYNCHRONOUS AM: Outperforms regular AM during selective fading. Provides optional automatic VFO tracking of AM signals up to +/- 2.5 kHz. Select AM mode, then hold ALT to select AM-S. The -S icon flashes slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT; one of the two sidebands may reduce QRM. Sync AM also works with diversity receive. (Note: Some AM broadcast stations encode their carrier, resulting in a low-pitched noise when Sync AM is turned on.) With Sync AM you can tune manually, or use automatic VFO tracking: -- If tuning manually, you need to tune to within +/- 10 Hz of the actual carrier frequency, at which point the K3 will phase-lock to the carrier. -- To enable VFO tracking, tap CWT, which turns on the T icon. Or, tap SPOT to engage VFO tracking just long enough to lock. When tracking is on, the VFO may “hunt” slowly across a span of several Hz. IMPORTANT: For AM QSOs, use SPLIT mode when VFO tracking is turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals. Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both VFOs will always be in the same mode (AM-S LSB or USB). Remote Control Command Changes: * UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9 move the VFOs by 100 and 200 Hz, respectively. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K1 power output
I'm in the midst of completing my K1. Following the DC Voltage Table I find that (with a 12.75 battery supply) RF-U9 has p2=6.2v, p3=6.2v, p6=6.2v, p7=12.4v. These seem in line with the lower supply. RF-Q6 has B=0.8v, C=0.1v, E=0.1v and RF-Q7 has B=0.0, C=12.45, E=0.0. The tables show Q6 collector should be up in the 12v range given my lower input voltage. Voltage on either lead of RFC5 is ~12v, as is the high end of R33. I'm not quite sure what I should read from this - I'm just a software guy. Could someone provide a bit of guidance? Thanks 73, John -- John Griswold, KK1X j...@kk1x.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] K2 KIO2 Polling Noise in PC Speakers w/ HRD
Hi Don, Thanks for the tip (why didn't I think of that?!?). I tied a wire between the PC and K2 chassis and the polling noise dropped dramatically. Although it is still audible, it is diminished to the point where I can live with it. Hopefully the wire wouldn't introduce any ground loops THANKS! 73 Brian N5BCN Don Wilhelm-4 wrote: Brian, There may be a potential difference (voltage) between your PC chassis and the K2. Try bonding them together (with a wire) to see if that helps. No guarantees, but it is worth a try. 73, Don W3FPR N5BCN wrote: (K2 #6800 w/ KSB2 KIO2 KAT2 KNB2) Hi, My first post to the reflector. :-) I recently completed the KIO2 module (without KPA100) and have been controlling the K2 via HRD v5.0. I'm passing the K2 audio via the K2 EXT SPKR connection to the the PC Mic In and out to PC Speakers. All is well EXCEPT for an annoying buzzing noise coming through the PC Speakers that is caused by HRD polling the K2. I know this because when I change the polling interval, the noise changes accordingly. Also, when I disconnect HRD from the K2, the noise goes away. Even holding down a button, which pauses the HRD/K2 polling, causes the noise to cease. Of course it starts up as soon as I release the mouse button. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html - K2 #6800 KSB2 KAT2 KIO2 KNB2 -- View this message in context: http://n2.nabble.com/K2-KIO2-Polling-Noise-in-PC-Speakers-w-HRD-tp3978029p3984037.html Sent from the [K2] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K1 power output
John, Even a software guy may be able to read a schematic - at least to the extent that it shows 'which is connected to what'. Do check the schematic and you should see that the only thing between RFC5 and the collector of Q6 is T3. Check that toroid carefully for poorly tinned and soldered leads. If you can see any enamel on the solder side of the board, that is a sure sign that the lead was not well stripped and tinned. Removal and re-tinning is the only cure. 73, Don W3FPR John Griswold wrote: I'm in the midst of completing my K1. Following the DC Voltage Table I find that (with a 12.75 battery supply) RF-U9 has p2=6.2v, p3=6.2v, p6=6.2v, p7=12.4v. These seem in line with the lower supply. RF-Q6 has B=0.8v, C=0.1v, E=0.1v and RF-Q7 has B=0.0, C=12.45, E=0.0. The tables show Q6 collector should be up in the 12v range given my lower input voltage. Voltage on either lead of RFC5 is ~12v, as is the high end of R33. I'm not quite sure what I should read from this - I'm just a software guy. Could someone provide a bit of guidance? Thanks 73, John __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] What happened?
When the K3 Utility establishes communications with the K3 the buttons are enabled. Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bruce McLaughlin Sent: Tuesday, November 10, 2009 5:19 PM To: elecraft@mailman.qth.net Subject: [Elecraft] What happened? Well, here I go again with a probably stupid question but that is my nature. I happened to notice that the K-3 utility has a number of features grayed out including all of the configuration menu options. I can neither see what's on there or make any adjustments. I have the latest firmware installed and this is the first time I noticed that this has apparently changed. Has anybody else experienced this situation? Bruce-W8FU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] K2 KIO2 Polling Noise in PC Speakers w/ HRD
Brian, The wire actually diminished ground loops. A ground loop forms between two chassis at different potentials, and that potential difference causes current to flow on conductors that normally carry signals. There may still be a slight potential difference between the two chassis - it depends on the resistance/impedance of the connecting wire. You might reduce the noise even further with a larger wire or a strap, but one quickly reaches a point of diminishing returns. Other similar noise can occur because of what audio pros call a pin 1 problem. It does not always relate to an actual pin 1 (except for audio XLR cables). The shield of a cable *should* connect to the outside enclosure of a device, so any noise carried on the shield will be conducted on the outside of the enclosure. With the advent of PC boards and the ease of making shield connections to the ground plane of those PC boards (mounting the jack on the PC board rather than the enclosure, the shield connection often goes to the PC board ground plane first, and then afterward it may (or may not) be connected to the enclosure case. That situation is common, and does create the pin 1 problem which can induce noise onto the PC board ground plane and will modulate all signals on that board. Many (most) amateur transceivers and computer sound cards have this pin 1 problem. Extraordinary steps must be taken to eliminate such sneak paths. 73, Don W3FPR Brian N5BCN wrote: Hi Don, Thanks for the tip (why didn't I think of that?!?). I tied a wire between the PC and K2 chassis and the polling noise dropped dramatically. Although it is still audible, it is diminished to the point where I can live with it. Hopefully the wire wouldn't introduce any ground loops THANKS! 73 Brian N5BCN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] FS: 4x KFL3A-6K, 4x KBPF3, 2x KRC2, DX Doubler
I have the following K3 accessories for sale: (4) KFL3A-6K 6 kHz AM / ESSB, 8-pole filters (4) KBPF3 General Coverage RX Bandpass Modules (2) KRC2 Band Decoders (compatible w/ various rigs) (1) DX Doubler SO2R Controller w/ K3 cables KFL3A-6K filters and KBPF3 bandpass modules were installed in both main and sub-RX of two K3s. I mainly operate CW, so have used them very little. Asking $100/ea for KFL3A-6K filters, KBPF3 modules, or KRC2 decoders, incl. shipping (cont. US). Asking $200 + shipping for DXD + K3 cabling. Contact off-list if interested. Thanks. 73 - Eric NO3M __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
I tried this out tonight; WWV on 10 and 5 MHz; found that at this time, Synchronous USB was better than LSB, and using CWT to auto-track showed as much as 7 Hz offset in tracking. It was very interesting and I look forward to using it more for SWL in tough conditions. Thanks! 73 de Dave, W5SV Wayne Burdick wrote: K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now available. This revision includes Synchronous AM detection, which has a clear advantage over the regular AM detector during selective fading. In this mode, the K3 can optionally track AM stations that may be slightly mistuned, as you might find in an AM round-table on 75 m. It's also convenient for automatically zeroing in on AM broadcast stations. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
I have been using the Sync tonight on several AM SW stations. I have had very good results so far. Depending on the QRM the USB LSB do make a great difference. I have been waiting for this feature! Thanks, Rick -- KJ5QY wayne burdick wrote: K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now available. This revision includes Synchronous AM detection, which has a clear advantage over the regular AM detector during selective fading. In this mode, the K3 can optionally track AM stations that may be slightly mistuned, as you might find in an AM round-table on 75 m. It's also convenient for automatically zeroing in on AM broadcast stations. There are other considerations when using Synch AM, so you should read the release notes (below) before trying it. We'll be further refining our AM-S implementation in a later release, based on your feedback. Please send any questions to k3supp...@elecraft.com. For instructions on how to load beta firmware, see: http://www.elecraft.com/K3/k3_software.htm 73, Wayne N6KR * * * MCU 3.57 / DSP 2.45, 11-7-2009 Misc. Improvements: * TUNE SWITCH: “Double beep” with NR on eliminated. * DATA A: Loss of power when using TUNE corrected. New Feature: Synchronous AM Receive * SYNCHRONOUS AM: Outperforms regular AM during selective fading. Provides optional automatic VFO tracking of AM signals up to +/- 2.5 kHz. Select AM mode, then hold ALT to select AM-S. The -S icon flashes slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT; one of the two sidebands may reduce QRM. Sync AM also works with diversity receive. (Note: Some AM broadcast stations encode their carrier, resulting in a low-pitched noise when Sync AM is turned on.) With Sync AM you can tune manually, or use automatic VFO tracking: -- If tuning manually, you need to tune to within +/- 10 Hz of the actual carrier frequency, at which point the K3 will phase-lock to the carrier. -- To enable VFO tracking, tap CWT, which turns on the T icon. Or, tap SPOT to engage VFO tracking just long enough to lock. When tracking is on, the VFO may “hunt” slowly across a span of several Hz. IMPORTANT: For AM QSOs, use SPLIT mode when VFO tracking is turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals. Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both VFOs will always be in the same mode (AM-S LSB or USB). Remote Control Command Changes: * UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9 move the VFOs by 100 and 200 Hz, respectively. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://n2.nabble.com/K3-Beta-Firmware-Rev-3-57-Synchronous-AM-Detection-AM-S-misc-improvements-tp3983997p3984659.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
