Re: [Elecraft] KX3 won't stop scanning-- help!
I had some enquiries about the macros I am using to switch between packet and SSB mode, so I did a brief writeup on my webpage: http://www.vk2rq.ampr.org/macros.html 73, Matt VK2RQ On 11 May 2014, at 9:39 am, Matt VK2RQ matt.vk...@gmail.com wrote: For this reason, I set up one of the PFn buttons to toggle between data mode and normal(SSB) mode. It does things like set up the MIC BTN, VOX, AF and Mic levels, etc., and then I don't forget anything. 73, Matt VK2RQ On 11 May 2014, at 8:30 am, Julie Royster jsdroys...@nc.rr.com wrote: OK, thanks for this input!! Right now the external sound card of the computer is plugged into the mic socket. Maybe I forgot to reset mic btn to off... Larry uses VOX for PSK. Onward and upward! 73, Julie KT4JR -Original Message- From: d...@lightstream.net [mailto:d...@lightstream.net] Sent: Saturday, May 10, 2014 5:05 PM To: Julie Royster Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 won't stop scanning-- help! I had this happen to me. In my case, I was trying out a microphone adapter that I had cobbled together, and I had managed to trigger the UP/DOWN functionality. Try pulling the microphone connector out of the radio and see if it stops scanning. 73, Dale WA8SRA Hello out there! My husband Larry's KX3 has gotten stuck scanning on all bands when in any mode except Data A for PSK. He never intentionally started a scan - not sure how this happened. Howard at Elecraft suggested reinstalling the original factory config file, which I did, but it did not help. The manual says to press any button to stop scanning, but no luck. Ideas, anybody? Larry would like to try using RTTY but cannot until we get this scan thing to stop. Cheers and 73, Julie KT4JR __ 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 Message delivered to d...@lightstream.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 Message delivered to matt.vk...@gmail.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 Message delivered to arch...@mail-archive.com
[Elecraft] WTB: KDSB2
I blew it, and in a quick transaction sold one of my K2's forgetting that It had the DSP. Does anyone have one that they don't need that they are willing to part with? cheers, Paul - VA7NT __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 won't stop scanning-- help!
Matt, Thanks for sharing that, I found a few interesting things to add to mine as a result. -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info On Sun, 2014-05-11 at 16:39 +1000, Matt VK2RQ wrote: I had some enquiries about the macros I am using to switch between packet and SSB mode, so I did a brief writeup on my webpage: http://www.vk2rq.ampr.org/macros.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 won't stop scanning-- help!
Matt, Many thanks! You have provided a great reason (and a rosetta stone) for me to start exploring the command structure. Looks like fun. Jack - KD4IZ On 5/11/2014 02:39, Matt VK2RQ wrote: I had some enquiries about the macros I am using to switch between packet and SSB mode, so I did a brief writeup on my webpage: http://www.vk2rq.ampr.org/macros.html 73, Matt VK2RQ --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 won't stop scanning-- help!
I read through the two macros on the page. In the PKT macro, you turn off the speech processor, audio effects, and turn *on* DATA A. Wouldn't turning DATA A *on* negate the need to turn of the speech processor and audio effects? There may be other settings that are turned off by going into DATA mode, but I cannot remember them off the top of my head. I don't often use the built in macros except for one thing on my K3 so maybe I'm missing something there. 73, Joel - W4JBB On 5/11/14, 1:39 AM, Matt VK2RQ wrote: I had some enquiries about the macros I am using to switch between packet and SSB mode, so I did a brief writeup on my webpage: http://www.vk2rq.ampr.org/macros.html 73, Matt VK2RQ __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3: popping noise in radio speaker
Ed, Were those good quality, name brand batteries? I have heard similar popping noises from audio amplifiers caused by batteries with high series resistance. I have not observed that problem with the KX3, so I am just suggesting that the problem may have been the batteries. 73, Don W3FPR On 5/10/2014 7:55 PM, Edward R Cole wrote: While on my trip in the lower-48 I installed batteries in my KX3 for the first time (run it off 13.5v PS in the shack). I noted that there was a regular popping noise at a regular beat about once per second. I checked battery voltage and saw that is was below 12v and dropping slowly. I used eight AA batteries which all tested at 1.53v before installation - brand new out of the package. 8x1.53 = 12.24v but there is loading so voltage started at about 11.9v. I noted current was running about 250ma with radio in SSB and normal volume level. I guess the radio draws pretty hard in receive. I removed the batteries and radio runs normal with 13.5vdc applied. I guess using 2.2v lithium or NiHD batteries would work better. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 won't stop scanning-- help!
Supposedly the DATA-A mode should automatically disable some of those settings, but in early versions of the firmware, this didn't seem to work properly. I haven't revisited this behaviour with the more recent firmware, so it may well be that those settings are now being properly disabled in the DATA-A mode, and that the corresponding commands in my macros have become redundant. 73, Matt VK2RQ On 11 May 2014, at 10:34 pm, Joel Black w4...@charter.net wrote: I read through the two macros on the page. In the PKT macro, you turn off the speech processor, audio effects, and turn *on* DATA A. Wouldn't turning DATA A *on* negate the need to turn of the speech processor and audio effects? There may be other settings that are turned off by going into DATA mode, but I cannot remember them off the top of my head. I don't often use the built in macros except for one thing on my K3 so maybe I'm missing something there. 73, Joel - W4JBB On 5/11/14, 1:39 AM, Matt VK2RQ wrote: I had some enquiries about the macros I am using to switch between packet and SSB mode, so I did a brief writeup on my webpage: http://www.vk2rq.ampr.org/macros.html 73, Matt VK2RQ __ 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 Message delivered to matt.vk...@gmail.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 Message delivered to arch...@mail-archive.com
[Elecraft] K3 Low end roll off in Data mode
I have noticed significant low end roll off in the Data mode below .5 kHz. (Both transmit and receive). This is not present in the SSB mode. It is not related to the settings on my roofing filters because it is there with both the 6 kHz filter and the 2.7 kHz filter, and even with shift and width settings set correctly for low end coverage. It seems like it is the DSP firmware. This roll off can be limiting with some digital modes. Using SSB mode does a great job of flattening out the lower end but it is very inconvenient to have to zero out my equalizers each time I want to switch from voice to digital. Could somebody at Elecraft confirm if it is a firmware issue and if there is a way to turn it off and make the Data lower end flat like SSB? Thanks! Dean KG7MZ K3 #3873 __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3: SSB generation
Thanks for writing, Lyle. I am curious, then, why the (K3) SSB signal is routed through a crystal filter. Is it purely a belt and suspenders approach to enforcing a limit on the bandwidth of the transmitted signal? Brian K1LI -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-SSB-generation-tp7588865p7588922.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 Message delivered to arch...@mail-archive.com
[Elecraft] Keying oand sending CW on KX3 with N1MM
I tried to get the KX3 to work with the latest rev level of N1MM and configured it per the instructions for one cable connection using just the USB to serial cable supplied to go between the radio and PC win7. The configuration talks ok at 38400bps with commands for changing bands, vfo frequency and mode but I get an error message saying no CW port has been selected. I'm running on COM 3.In reading through the help manual I some radios require cw keying via a separate keying line into the KX3 using the serial commands set. Anyone been through this with the KX3 and figured out how to run with only the USB to serial cable? Thanks John, W1QS __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3: SSB generation
The 15 K Hz signal from the DSP is a SSB signal. This is the second IF frequency (from the antenna side). When this is mixed with the 8.230 Mhz in you end up with the sum and difference with the 15KHz: Namely 8.215 and 8.245 MHz. The 8.215 MHz filter is used to remove the unwanted 8.245 MHz component leaving the desired first IF frequency K1LI [via Elecraft] wrote: Thanks for writing, Lyle. I am curious, then, why the (K3) SSB signal is routed through a crystal filter. Is it purely a belt and suspenders approach to enforcing a limit on the bandwidth of the transmitted signal? Brian K1LI If you reply to this email, your message will be added to the discussion below: http://elecraft.365791.n2.nabble.com/K3-SSB-generation-tp7588865p7588922.html To start a new topic under [K3], email ml-node+s365791n365792...@n2.nabble.com To unsubscribe from Elecraft, click here http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_codenode=365791code=bGF3bG9wZXozQGdtYWlsLmNvbXwzNjU3OTF8MjU5MTAzNDE2. NAML http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=macro_viewerid=instant_html%21nabble%3Aemail.namlbase=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespacebreadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-SSB-generation-tp7588865p7588924.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 Message delivered to arch...@mail-archive.com
[Elecraft] [OT] Yaesu FT-7B wanted
Please forgive the bandwidth used. My son-in-law’s cousin Eirik LA9OFA in Norway above the Arctic Circle is trying to find a transceiver like the first rig he had. He asked me to see if I could find anyone who had a working Yaesu FT-7B they would be willing to sell. Why here? I am trying everything. Any ideas of where to look would be appreciated. Contact me off line. Thanks you, David K0LUM __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3: SSB generation
The schematics show two internal crystal filters: one on the receive path (2 poles) K3 RF Board It's marked BW 14 kHz. 8215.0 KHz. This has no relay to bypass it. one on the transmit path (4 poles) KREF3 REF/2ND TX IF It's marked 8215.0 kHz, BW=4 kHz This has a relay to move to bypass it. These seem to be in addition to the 5 user accessible crystal filters. So there seems to be large quantities of belts and suspenders. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-SSB-generation-tp7588865p7588926.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 Message delivered to arch...@mail-archive.com
[Elecraft] Test
TEST to see if I'm back on list. 73, Joe W2KJ __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Keying oand sending CW on KX3 with N1MM
John, This may not be exactly the same, but here is how I have my K3 set up in N1MMit should get you in the right ball park. In N1MM Config, select Hardware. For Com 1, for rig, select 'None' and put check marks for Digital and for CW/Other. In Set, set DTR = CW and RTS = Always Off. For Com 2, for rig, select KX3 and in 'SET', use 38400/N/1 and for DTR and for RTS, set them for Always Off. Of course you can set any unused Com port, from 1 up to a max of 8. I use a single FITI USB to Serial converter specified as COM 2. I am assuming the keying for the KX3 is the same as for the K3. Hope this helps John. 73, Tom - W4BQF -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Lawrence via Elecraft Sent: Sunday, May 11, 2014 9:54 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Keying oand sending CW on KX3 with N1MM I tried to get the KX3 to work with the latest rev level of N1MM and configured it per the instructions for one cable connection using just the USB to serial cable supplied to go between the radio and PC win7. The configuration talks ok at 38400bps with commands for changing bands, vfo frequency and mode but I get an error message saying no CW port has been selected. I'm running on COM 3.In reading through the help manual I some radios require cw keying via a separate keying line into the KX3 using the serial commands set. Anyone been through this with the KX3 and figured out how to run with only the USB to serial cable? Thanks John, W1QS __ 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 Message delivered to alderm...@windstream.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 Message delivered to arch...@mail-archive.com
[Elecraft] Elecraft SSB net results for 5/4/2014
Here is the SSB net report for May 4, 2014. We had 25 participants over 26 minutes. Station NameQTH Rig S/N N6JWJohnCA K3 936 W8OVDaveTX K3 3139 KA9ZAP Art TN KX3 652 KM4IK Ian GA K3 281 NC0JW Jim CO KX3 1356 W4RKS Jim TX K3 3618 KF5IMA Bruce MS K2 3575 WB9JNZ EricIL K3 4017 AD5IJ Howard OR KX3 5178QRP WN4SLG DougTN K3 6433 W0CZKen ND K3 457 K4PMI PhilKX3 QRP AB7CE Roy MT KX3 115 QRP K4FIDougSC K3 6199 KF5YBE Lee TX K3 7771 KA0NCR Arnie NE KX3 161 N8OQJim VA KX3 5880 QRP KE5VDT Roger TX K3 6054 W7NMD Palmer AR K3 3779 W2RWA DickNY K3 2603 K5ZCJ Larry OK K3 6592 KA6GMA GlenCA K3 7522 W4PFM PaulVA K3 1673 KK4QDZ BillNC KX3 4515 NS7PPhilOR K3 1826 73, Phil, NS7P __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Keying oand sending CW on KX3 with N1MM
You might try LP Bridge. The program allows splitting a single PC port to multiple external com ports. I use LP Bridge with RMS Express. RMS requires a separate keying port -and- and control port. Sounds like the same type of problem you have. 73, matt W6NIA On Sun, 11 May 2014 09:54:23 -0400 (EDT), you wrote: I tried to get the KX3 to work with the latest rev level of N1MM and configured it per the instructions for one cable connection using just the USB to serial cable supplied to go between the radio and PC win7. The configuration talks ok at 38400bps with commands for changing bands, vfo frequency and mode but I get an error message saying no CW port has been selected. I'm running on COM 3.In reading through the help manual I some radios require cw keying via a separate keying line into the KX3 using the serial commands set. Anyone been through this with the KX3 and figured out how to run with only the USB to serial cable? Thanks John, W1QS __ 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 Message delivered to mzil...@roadrunner.com Matt Zilmer, W6NIA -- Give me six hours to chop down a tree and I will spend the first four sharpening the axe. -A. Lincoln __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Keying oand sending CW on KX3 with N1MM
The KUSB cable used with the K3, as well as several other USB-to-Serial cables that provide a DE-9 connector, include modem control signals (RTS and DTR, etc) as well as TxD and RxD. N1MM uses these lines, in addition to the K3's PTT KEY menu, to use one serial port (with USB) to assert PTT and key the radio as well as CAT communications (frequency polling and the like). See http://en.wikipedia.org/wiki/Rs232 for a description of the various modem control lines. The KXUSB cable provided with the KX3 carries only three wires: TxData, RxData, and signal ground. The modem control signals are not present in this converter. The KX3 does not provide a PTT KEY menu item because there are no DTR or RTS signals available. The KX3 does not use a full RS-232 cable, just the three wires needed for firmware load and serial communications other than RTS and DTR. The KX3 Utility uses the KX3's KY command to send CW characters. My understanding is that N1MM does not currently use the KY technique. N1MM's computer keying choices are (if I recall correctly), serial port keying (DTR for CW keying and RTS for PTT), and WinKey, a popular device provided by K1EL and integrated into a number of external keying controllers. I believe it is possible to use one USB to Serial Adapter serial port with the KX3, but you'll need to provide I little bit of wiring and a few devices on the DE-9 end of a standard USB to Serial adapter cable (such as the KUSB). The TxD, RxD, and Signal ground go to a 3.5mm plug that goes into KX3 ACC1. The DTR and RTS signals need to go to the KX3 key line and the ACC2 GPIO PTT connector, and some level shifting circuitry will be required. The common circuit for CW keying from a serial port, which pulls a positive voltage to ground using DTR is shown on AA5AU's web at http://www.aa5au.com/rttyinterface.html. For most radios, the RS-232 RTS line is used with a transistor switch to pull PTT down to ground. This might work through the KX3's microphone connector. But the KX3 owner's manual description of the ACC2 GPIO line says that you need to provide not more than 3V to use it for PTT. A series resistor may suffice, or perhaps a level shifter that transforms the 5 or 12V that your USB to serial adapter provides on RTS to the at-most 3V that the KX3 ACC2 GPIO input will tolerate. There are advantages to a WinKey. I've used this device (embedded in controllers) for some time. See http://k1el.tripod.com/products.html and http://k1el.tripod.com/WhatisWK.html Sometimes computer-generated CW timing can stutter depending on the operating system's dispatching priorities. Occasionally in mid-contest I've had activity from other processes disturb the timing of CW keying. My computer might start a nightly virus scan, or backup, or maybe one of several products (Microsoft, Java, Adobe) wants to check for updates, and I forget to turn this stuff off before a contest. N1MM itself might be very busy updating the band map, dealing with lots of internet traffic from spotting networks, perhaps looking up call signs in a large super check partial database, and I've had some CW stutter. This depends on the computer speed and size of the log and is very difficult to test ahead of the contest. Contest logging programs are amazingly complex pieces of software, and it sometimes makes sense to offload some of the critical timing tasks (sending good Morse code at speed) onto a dedicated device. A Winkey is inexpensive and quite useful. But it's yet another box to deal with... 73 de Dick, K6KR -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Lawrence via Elecraft Sent: Sunday, May 11, 2014 6:54 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Keying oand sending CW on KX3 with N1MM I tried to get the KX3 to work with the latest rev level of N1MM and configured it per the instructions for one cable connection using just the USB to serial cable supplied to go between the radio and PC win7. The configuration talks ok at 38400bps with commands for changing bands, vfo frequency and mode but I get an error message saying no CW port has been selected. I'm running on COM 3.In reading through the help manual I some radios require cw keying via a separate keying line into the KX3 using the serial commands set. Anyone been through this with the KX3 and figured out how to run with only the USB to serial cable? Thanks John, W1QS __ 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 Message delivered to d...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:
Re: [Elecraft] Keying oand sending CW on KX3 with N1MM
A little more digging with my favorite search engine led me to this article. http://k4mtx.wordpress.com/2013/06/02/kx3-how-to-configure-n1mm-to-use-funct ion-keys-to-send-cw-without-additional-cables-or-hardware-like-winkeyer/ 73 de Dick, K6KR -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Lawrence via Elecraft Sent: Sunday, May 11, 2014 6:54 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Keying oand sending CW on KX3 with N1MM I tried to get the KX3 to work with the latest rev level of N1MM and configured it per the instructions for one cable connection using just the USB to serial cable supplied to go between the radio and PC win7. The configuration talks ok at 38400bps with commands for changing bands, vfo frequency and mode but I get an error message saying no CW port has been selected. I'm running on COM 3.In reading through the help manual I some radios require cw keying via a separate keying line into the KX3 using the serial commands set. Anyone been through this with the KX3 and figured out how to run with only the USB to serial cable? Thanks John, W1QS __ 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 Message delivered to d...@elecraft.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3: SSB generation
Hi Larry, The schematics show two internal crystal filters: one on the receive path (2 poles) K3 RF Board It's marked BW 14 kHz. 8215.0 KHz. This has no relay to bypass it. This is used to further suppress the 2nd-IF image response at 8245 kHz. It has essentially no ripple and thus no negative impact on the passband. one on the transmit path (4 poles) KREF3 REF/2ND TX IF It's marked 8215.0 kHz, BW=4 kHz This has a relay to move to bypass it. This filter lowers the low noise floor of the IF signal feeding the transmit gain stages and main IF crystal filters. We bypass it in wideband transmit modes (AM, FM, ESSB). This supplemental filtering is needed to achieve the K3's high blocking dynamic range, rapid fall-off of phase noise, and excellent rejection of image responses. 73, Wayne N6KR __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft SSB net results for 5/4/2014
The band was pretty grim this morning, here at least. How many check-ins today, Phil? Phil w7ox On 5/11/14, 8:22 AM, Phil Shepard wrote: Here is the SSB net report for May 4, 2014. We had 25 participants over 26 minutes. Station NameQTH Rig S/N N6JWJohnCA K3 936 W8OVDaveTX K3 3139 KA9ZAP Art TN KX3 652 KM4IK Ian GA K3 281 NC0JW Jim CO KX3 1356 W4RKS Jim TX K3 3618 KF5IMA Bruce MS K2 3575 WB9JNZ EricIL K3 4017 AD5IJ Howard OR KX3 5178QRP WN4SLG DougTN K3 6433 W0CZKen ND K3 457 K4PMI PhilKX3 QRP AB7CE Roy MT KX3 115 QRP K4FIDougSC K3 6199 KF5YBE Lee TX K3 7771 KA0NCR Arnie NE KX3 161 N8OQJim VA KX3 5880 QRP KE5VDT Roger TX K3 6054 W7NMD Palmer AR K3 3779 W2RWA DickNY K3 2603 K5ZCJ Larry OK K3 6592 KA6GMA GlenCA K3 7522 W4PFM PaulVA K3 1673 KK4QDZ BillNC KX3 4515 NS7PPhilOR K3 1826 73, Phil, NS7P __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3: popping noise in radio speaker
Subject: Re: [Elecraft] KX3: popping noise in radio speaker Message-ID: 536f6e90.5000...@embarqmail.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed Ed, Were those good quality, name brand batteries? I have heard similar popping noises from audio amplifiers caused by batteries with high series resistance. I have not observed that problem with the KX3, so I am just suggesting that the problem may have been the batteries. 73, Don W3FPR --- Don, Reasonable question but were taken out of new package for install into the radio. I measured each Duracel AA battery afterward at 1.53v unloaded. Popping ceased with external 13.5vdc applied, with either internal speaker or external speakers. Since I do not intend to every use internal batteries, it will remain a curiosity. I will run it on 13.5v from either home supply, car battery or portable sealed-acid battery. I'm beyond the age for mountain climbing or backpacking. Hiking thru airports is enough! Now awaiting the 2M module for my KX3. 73, Ed - KL7UW http://www.kl7uw.com Kits made by KL7UW Dubus Mag business: dubus...@gmail.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 Message delivered to arch...@mail-archive.com
[Elecraft] [K3] Roofing filters are misunderstood
What determines the bandwidth you hear at the loudspeaker? It's not your roofing filter, despite a continuing notion that it is. Dave Hachadorian's point in a post a few weeks ago was that you don't need a 1.8 kHz filter to get a 1.8 kHz bandwidth. You're free to set whatever bandwidth you want with any filter. Before rigs had DSP we got used to the idea that your crystal filter sets your bandwidth. That's not true any more. It sets your *maximum* bandwidth. You then have the freedom to narrow and position a bandwidth arbitrarily using the DSP controls [SHIFT and WIDTH or HI and LO]. Here's a true-false quiz: 1. I'm a contester, so I need a 1.8 kHz roofing filter in the K3. 2. I should purchase the 400 Hz filter if I like to operate CW with bandwidths of 300 - 400 Hz. 3. For SSB, the 2.7 and 2.8 kHz filters are 'too wide'. 4. I have the 2.7 kHz filter installed, so for best results I should set my WIDTH control for a passband of 2.7 kHz. 5. I can use my 2.7 kHz filter in CW mode with my LO=0.30 and HI=0.50 (that is, BW=0.20). The answers are: 1. False. You do not need a 1.8 kHz filter just to set the BW=1.80. A 2.7 kHz filter can serve well during a contest with a much narrower DSP bandwidth. Refer to Dave's original post. 2. False. You can set the CW bandwidth to 400 using any filter whose bandwidth is equal to or greater than 400. 3. False. This was Dave's point. You're free to have a 2.7 or 2.8 installed, yet set the WIDTH to 1.8, 1.5 or anything else you wish. 4. False. You don't need to restrict yourself to only that bandwidth. You can set it to a narrower value if you wish. 5. True. And you'll probably suffer no ill effects under most conditions. Furthermore, the but extremely strong signals will pump my hardware AGC arguments are probably a bit overrated. Most folks, even before a strong station gets close enough to do that, will give up and leave the frequency because of the QRM, especially in the presence of transmitted phase noise or key clicks as has come up in more recent posts. So then why have narrow roofing filters to choose from? To maximize the close-in dynamic range, which is important if you have large antennas in high-RF environments. The vast majority of hams does not absolutely need really narrow roofing filters. It's wonderful that the K3 allows this, but it's certainly not mandatory, especially for casual operating. Finally, note that if you received good training as a Novice with a poor, unselective receiver, you'll be able to copy right through any AGC pumping! It's the operator, more than the filters. Al W6LX __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] [K3] Hum JT65/JT9 and Vox. Resolved.
This is actually covered already but I need to mention it. When the WSJTX waterfall started losing signals into the noise I noticed that there was a neat periodic set of signals that lined up with the frequency ticks. Eventually it dawned on me that they were 120 Hz apart and eventually I found a 60 Hz fundamental. What I found is that the the line out was picking up the linear power supply that was behind it. What I also found out was that as the K3 got closer the the transmitter came on. So the magnetic field from the current spikes from the diodes in the power supply were being picked up line transformers in the K3. So I moved the power supply. Since the transformers get rid of ground loops I wouldn't complain too much. End of Story. PS it was really unnerving to move the K3 and have it turn on. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Hum-JT65-JT9-and-Vox-Resolved-tp7588936.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 Message delivered to arch...@mail-archive.com
[Elecraft] [KX3] Case Doesn't Close Quite Right
I've had my KX3 for a while now and I noticed the other day that where the bottom of the two halve meet up, there appears to be... Well, I'm not sure how to describe it. Near the speaker, it appears the two halves don't meet up as well as at the ends. If you look at the top half of the enclosure, it is beveled and slides *inside* the bottom half. At either end, they mate up well. Near the speaker, there appears to be a 3 - 4 mm gap where it doesn't appear to meet up as well. Am I describing that in a way that *anyone* understands? If it's normal, I'm good with that. However, if there's something I should check, I will. I have looked at the ribbon cable and it is folded the correct way. It is not pinched and the connectors seem to be fully seated. Maybe I'm mashing (Southern term) the ends together too far, but if I don't do that, the bottom of the sides and the bottom half of the enclosure don't meet up properly. I don't remember if I tried to mate the two halves without the batteries inside the radio. If needed, I can send pictures. 73, Joel - W4JBB __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Keying oand sending CW on KX3 with N1MM
I choose the easiest way for me and bought an interface named SUCCI-R which you can buy via ebay.com Information: http://www.kotarov.com/projects/succi It uses only one USB-Port and you have CW-keying, PTT and more (opto-isolated). Now I can work with my KX3 with the same software (Win-Test, Windows 8.1) like with my K3. You need only one additional cable from this interface to the key-input of the KX3. 55 Lothar, DJ8EW Am 11.05.2014 15:54, schrieb John Lawrence via Elecraft: ... Anyone been through this with the KX3 and figured out how to run with only the USB to serial cable? __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] For Sale: KX3 + extras and AlexLoop / Buddipole Antennas
KX3 Serial# 4981 - Purchased August 2013 (less than a year old). No scratches or dents. No functional issues. Includes - KXAT3 - Internal antenna tuner KXBC3 - Internal NiMH Charger with Real-time clock for KX3 KXFL3 - Dual-passband roofing filter KXSER-a - RS-232 Cable MH3 - Microphone KX3-PCKT - KX3 accessory cable set Powerpole enabled power cable All original spiral bound assembly, user manuals and documentation Additional KX3 Items - Included - * BNC-BP - BNC M-binding Posts * BNC-RA - BNC Right Angle M-F * Fred Cady - KE7X Book - The Elecraft KX3 (recent copy) * Side-KX End-plates (love handles) - http://gemsproducts.com/index.html * Side KX Cover - http://gemsproducts.com/index.html * 8 x rechargeable AA NiMH batteries Over $1600 invested in the list above. Asking - $1450 shipped to CONUS (or local pickup) I also have these antennas that go very well with the KX3 - * Brand new (1 month old) Alex Loop WalkHam - Excellent loop Antenna with customized tripod that fits in the antenna bag - $350 shipped to CONUS * Buddipole Deluxe - long version with several additional items - Purchased during Pacificon 2013 last year - Several upgrades - (yagi kit, book, knarls, etc.) - Too large to ship. Originally bought for $750 - local pickup for $625. Selling to keep the XYL happy. Contact me off-list please. — VaibhaV Sharma W7VAI Milpitas, California __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Hum JT65/JT9 and Vox. Resolved.
I was wildly optimistic in this. A second source of hum is the switching supply of the laptop. It's similar to the power supply hum. Even though it's clearly a switching supply. Curiosly the laptop need 12 volts. So perhaps I can pick that off of the linear power supply. Or maybe run everything off of a battery. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Hum-JT65-JT9-and-Vox-Resolved-tp7588936p7588941.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
I completely agree with all of that except for the very last sentence. Clearly you've never used a 756Pro (first version) in a major CW contest. I can remember very loud stations 10 or 15 KHz away completely desensing my receiver to the point that the station I was trying to copy simply disappeared. When I switched to the K3 the difference was astounding. 73, Dave AB7E On 5/11/2014 2:03 PM, Al Lorona wrote: What determines the bandwidth you hear at the loudspeaker? It's not your roofing filter, despite a continuing notion that it is. Dave Hachadorian's point in a post a few weeks ago was that you don't need a 1.8 kHz filter to get a 1.8 kHz bandwidth. You're free to set whatever bandwidth you want with any filter. Before rigs had DSP we got used to the idea that your crystal filter sets your bandwidth. That's not true any more. It sets your *maximum* bandwidth. You then have the freedom to narrow and position a bandwidth arbitrarily using the DSP controls [SHIFT and WIDTH or HI and LO]. Here's a true-false quiz: 1. I'm a contester, so I need a 1.8 kHz roofing filter in the K3. 2. I should purchase the 400 Hz filter if I like to operate CW with bandwidths of 300 - 400 Hz. 3. For SSB, the 2.7 and 2.8 kHz filters are 'too wide'. 4. I have the 2.7 kHz filter installed, so for best results I should set my WIDTH control for a passband of 2.7 kHz. 5. I can use my 2.7 kHz filter in CW mode with my LO=0.30 and HI=0.50 (that is, BW=0.20). The answers are: 1. False. You do not need a 1.8 kHz filter just to set the BW=1.80. A 2.7 kHz filter can serve well during a contest with a much narrower DSP bandwidth. Refer to Dave's original post. 2. False. You can set the CW bandwidth to 400 using any filter whose bandwidth is equal to or greater than 400. 3. False. This was Dave's point. You're free to have a 2.7 or 2.8 installed, yet set the WIDTH to 1.8, 1.5 or anything else you wish. 4. False. You don't need to restrict yourself to only that bandwidth. You can set it to a narrower value if you wish. 5. True. And you'll probably suffer no ill effects under most conditions. Furthermore, the but extremely strong signals will pump my hardware AGC arguments are probably a bit overrated. Most folks, even before a strong station gets close enough to do that, will give up and leave the frequency because of the QRM, especially in the presence of transmitted phase noise or key clicks as has come up in more recent posts. So then why have narrow roofing filters to choose from? To maximize the close-in dynamic range, which is important if you have large antennas in high-RF environments. The vast majority of hams does not absolutely need really narrow roofing filters. It's wonderful that the K3 allows this, but it's certainly not mandatory, especially for casual operating. Finally, note that if you received good training as a Novice with a poor, unselective receiver, you'll be able to copy right through any AGC pumping! It's the operator, more than the filters. Al W6LX __ 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 Message delivered to xda...@cis-broadband.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
I too think roofing filters are really not well understood. For the record, I have the stock SSB [2.7 KHz? I don't actually know] and the 500 Hz CW. In 99% of my operating situations, it doesn't matter which one I use, I set the received BW with the DSP, and I'm a very happy ham. I do have several close HP contesters, WX6V is one. On CW if I were to use the 2.7 roofer, even with a 250 Hz DSP, Jim will desense my K3 -- like maybe 1.5 miles as the electromagnetic waves travel. The roofer makes a difference with strong close in signals. Whether or not you want a 1.8, 2.7, 5-pole, 8-pole, or whatever may be trying to pick fly poop out of the pepper for most of us. If you run a lot of CW in crowded conditions, a more CW-ish filter is likely good for you. My neighbor Jim got a K3 early this year, replacing an ICOMsomething. Still just as strong on frequency, all of the phase noise has disappeared, no clicks -- nothing. Yet again, I'm a happy ham. 73, Fred K6DGW - Northern California Contest Club - CU in the 2014 Cal QSO Party 4-5 Oct 2014 - www.cqp.org On 5/11/2014 7:02 PM, David Gilbert wrote: I completely agree with all of that except for the very last sentence. Clearly you've never used a 756Pro (first version) in a major CW contest. I can remember very loud stations 10 or 15 KHz away completely desensing my receiver to the point that the station I was trying to copy simply disappeared. When I switched to the K3 the difference was astounding. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
I can remember very loud stations 10 or 15 KHz away completely desensing my receiver to the point that the station I was trying to copy simply disappeared. When I switched to the K3 the difference was astounding. That is because the 756Pro is a completely brain dead design ... there is only a single 30 KHz or so roofing filter at VHF and AGC which is based on total signal in that 30 KHz or so window starts at a very low level. The only job of the K3's *hardware AGC* is to protect the analog to digital converter from being driven into saturation so it does not begin to activate until approximately S9+40. The K3's normal AGC is entirely DSP based and is effectively controlled by only the signal which passes through the DSP (it is a shame the AGC control point isn't also after the notch G). 73, ... Joe, W4TV On 5/11/2014 10:02 PM, David Gilbert wrote: I completely agree with all of that except for the very last sentence. Clearly you've never used a 756Pro (first version) in a major CW contest. I can remember very loud stations 10 or 15 KHz away completely desensing my receiver to the point that the station I was trying to copy simply disappeared. When I switched to the K3 the difference was astounding. 73, Dave AB7E __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] Elecraft SSB net results for 5/11/2014
It was a pretty hard net this morning with terrible propagation. Signals were way down. Few could hear me well. We struggled through with 12 participants in 9 minutes. Hopefully, conditions will improve soon. Station NameQTH Rig S/N WV5IDwayne TX K3 5287 K5RHD Randy NM K3 7170 W0CZKen ND K3 457 NC0JW Jim CO KX3 1356 N6JW/m JohnCA KX3 515 QRP W4PFM PaulVA K3 1673 KM4IK Ian GA K3 281 W4RKS Jim TX K3 3618 W8OVDaveTX K3 3139 K7BRR BillAZ K3 5545 W7OXPhilCA K3 8004 NS7PPhilOR K3 1826 73, Phil, NS7P __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 supplemental heat sink offering
For the entire Cooler KX story go to www.ve7fmn.ca http://elecraft.365791.n2.nabble.com/file/n7588946/KX3-1.jpg -- View this message in context: http://elecraft.365791.n2.nabble.com/KX3-supplemental-heat-sink-offering-tp7586146p7588946.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
I would take issue with your answer to #1. It really depends on your situation. For most of the folks on this list your answer very well may be correct. In areas where there is very high station density, it probably is not. Here in Silicon Valley there are a LOT of very strong near-by signals. The 1.8 KHz filter keeps close-in LOUD signals out of my passband so that the DSP filters have a chance to do their job. This is the whole purpose of the filter, to keep other strong signals out of the passband so that the DSP can do the real work. By the way, for contesting (actually my main operating mode), I normally listen to SSB signals with low cut at 500 and high cut in the 1500-1800 range, well inside the 1.8KHz filter’s purview. Interestingly, I use matched 500 Hz 5-pole filters for CW contesting, where I can get within just a few hundred hertz of the local big signals without problem. My normal DSP bandwidth is something less that 500 Hz. It’s sideband contesting where I need the narrow filters. Since most of the local big guns also use K3s, phase noise and other similar problems are not a factor here. I really can get close to these folks and work lots of stations without either one of us being disturbed. I credit all this to the great RF system my friends have created. When I’m not in one of the big contests, or just casual QSOs where the big guns aren’t a factor, the 2.7 KHz filter does an outstanding job on whatever mode I use. I guess there is an exception to everything, and indeed there are times when the narrow filters are needed. Some of us actually do fall in that category. Oh to live back in the south where I definitely didn't have the problem… Jack B, W6FB (ex-WA4FIB) On May 11, 2014, at 2:03 PM, Al Lorona alor...@sbcglobal.net wrote: What determines the bandwidth you hear at the loudspeaker? It's not your roofing filter, despite a continuing notion that it is. Dave Hachadorian's point in a post a few weeks ago was that you don't need a 1.8 kHz filter to get a 1.8 kHz bandwidth. You're free to set whatever bandwidth you want with any filter. Before rigs had DSP we got used to the idea that your crystal filter sets your bandwidth. That's not true any more. It sets your *maximum* bandwidth. You then have the freedom to narrow and position a bandwidth arbitrarily using the DSP controls [SHIFT and WIDTH or HI and LO]. Here's a true-false quiz: 1. I'm a contester, so I need a 1.8 kHz roofing filter in the K3. 2. I should purchase the 400 Hz filter if I like to operate CW with bandwidths of 300 - 400 Hz. 3. For SSB, the 2.7 and 2.8 kHz filters are 'too wide'. 4. I have the 2.7 kHz filter installed, so for best results I should set my WIDTH control for a passband of 2.7 kHz. 5. I can use my 2.7 kHz filter in CW mode with my LO=0.30 and HI=0.50 (that is, BW=0.20). The answers are: 1. False. You do not need a 1.8 kHz filter just to set the BW=1.80. A 2.7 kHz filter can serve well during a contest with a much narrower DSP bandwidth. Refer to Dave's original post. 2. False. You can set the CW bandwidth to 400 using any filter whose bandwidth is equal to or greater than 400. 3. False. This was Dave's point. You're free to have a 2.7 or 2.8 installed, yet set the WIDTH to 1.8, 1.5 or anything else you wish. 4. False. You don't need to restrict yourself to only that bandwidth. You can set it to a narrower value if you wish. 5. True. And you'll probably suffer no ill effects under most conditions. Furthermore, the but extremely strong signals will pump my hardware AGC arguments are probably a bit overrated. Most folks, even before a strong station gets close enough to do that, will give up and leave the frequency because of the QRM, especially in the presence of transmitted phase noise or key clicks as has come up in more recent posts. So then why have narrow roofing filters to choose from? To maximize the close-in dynamic range, which is important if you have large antennas in high-RF environments. The vast majority of hams does not absolutely need really narrow roofing filters. It's wonderful that the K3 allows this, but it's certainly not mandatory, especially for casual operating. Finally, note that if you received good training as a Novice with a poor, unselective receiver, you'll be able to copy right through any AGC pumping! It's the operator, more than the filters. Al W6LX __ 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 Message delivered to jackbrin...@me.com __ Elecraft mailing list Home:
Re: [Elecraft] [K2] VCO Not Oscillating
Hey, I wanted to let you guys know that the root cause has been found. I asked Don to look at the radio and the root cause was that I had misplaced a 1pF cap at C68 which was labeled 1D. C68 was supposed to be 10pF. It was a stupid construction mistake after all. Perhaps this can serve as a nice data point for anyone else building the K2 that has a similar problem. I will be getting the radio back soon and hope to finish the kit without incident. Thanks, Joseph KI4ITG -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-VCO-Not-Oscillating-tp7588086p7588948.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Hum JT65/JT9 and Vox. Resolved.
I switched to a Creative Sound Blaster X-Fi Go! USB dongle and that got rid of the hum from the laptop charger. I got this originally because the desktop I use has no sound support at all. It was an extremely cheap server box that runs Linux. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Hum-JT65-JT9-and-Vox-Resolved-tp7588936p7588949.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 Message delivered to arch...@mail-archive.com
[Elecraft] [K2] VCO Not Oscillating
We did make similar mistakes throught out our hobby. Wrong parts, wrong components at wrong places are always the problems. Even I built the 10th K2, I still made mistakes. 73 Johnny VR2XMC 寄件人︰ Joseph Baxley via Elecraft elecraft@mailman.qth.net 收件人︰ elecraft@mailman.qth.net 傳送日期︰ 2014年05月12日 (週一) 11:59 AM 主題︰ Re: [Elecraft] [K2] VCO Not Oscillating Hey, I wanted to let you guys know that the root cause has been found. I asked Don to look at the radio and the root cause was that I had misplaced a 1pF cap at C68 which was labeled 1D. C68 was supposed to be 10pF. It was a stupid construction mistake after all. Perhaps this can serve as a nice data point for anyone else building the K2 that has a similar problem. I will be getting the radio back soon and hope to finish the kit without incident. Thanks, Joseph KI4ITG -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-VCO-Not-Oscillating-tp7588086p7588948.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 Message delivered to vr2...@yahoo.com.hk __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
ORIGINAL MESSAGE: (may be snipped) On 5/11/2014 7:25 PM, Fred Jensen wrote: I too think roofing filters are really not well understood. REPLY: A large part of the misunderstanding is due to the name. Whoever chose the name roofing did a great disservice. A better name would simply be it's function: 1st I.F. filter. That's what it is and that's what it does. I have always thought that roofing was a marketing ploy to imbue it with some kind of magical powers. 73, Bill W6WRT __ 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 Message delivered to arch...@mail-archive.com
