[Elecraft] KAT3 Equivalent to KAT500 Edit Configuration?
Does the KAT3 have an equivalent to the Edit Configuration window in KAT500 Utility? I'm thinking specifically of functions like the VSWR Threshold for bypass and autotune. I don't see it in K3 Utility and I don't think there is a KAT3 Utility. I probably knew the answer to this years ago and have forgotten. THanks, /Rick __ 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] KXPA100 Low Receive Signals
OK what do I need to change on my KX3 Menu? As I increase power from 4 watts to 100 watts I hear a series of clicks one at 5 watts and one at 10 watts from the amp. Each time there is a click the receive signal drops like an attenuator. The attenuator on the back of the amp is in the OUT position. What do I have messed up now? What do I need to change? -- Jim K9TF __ 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] List of K1 modifications
Hi Jim. Have a look at this page http://homepage.ntlworld.com/lapthorn/k1.htm. At the bottom you will find two links to sites decribing som mods made by others than Elecraft. Mods made by Elecraft (if there are any), you will probably find on the official Elecraft site. 73 de Hal la4xx http://homepage.ntlworld.com/lapthorn/k1.htm On 15-01-19 01:24, James Rodenkirch rodenkirch_...@msn.com wrote: Does anyone have a list of all K1 mods (those approved by Elecraft and those that others have installedOR the URL of a site that does and can vector me to? Thank you, in advance, for your assistance. 72, Jim Rodenkirch __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 Message delivered to dukl...@broadpark.no __ 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] FS/SOLD
Greetings, The XV144 has been sold. The XV50 is still available. It is in good operating and physical condition. The manual for it is available on line at Elecraft. It will include the power cable fused and with Anderson power pole connectors. Also, will be the RF cables for a K2 with KV60 option if you need it. The I/O cable will be included if you need it as well for a K2 and computer. If you do not need either I would like to keep them otherwise they go with the XV50. $275 and I will ship it priority mail and will accept Paypal. Thanks, Mike KØAZ k...@centurytel.net GOD BLESS AMERICA KØAZMike Sanders EM37cd www.k0az.com SouthWest Missouri __ 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] Diversity reception in the K3
Going beyond pushing a button, could someone explain how diversity reception is accomplished in the K3? How are the two receivers locked together, phase coherently. Tnx 73 Dale, K9VUJ __ 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] Working Split with a K1
I have also used my K1 for DXing and know the offset is limiting at times. I had one occasion that pushed my K1 beyond the normal limit. I was trying to work N8S on Swain Island on 17 meters. They were working up 5 khz well beyond the RIT. I made a note of the exact frequency they were transmitting on then moved up about 5 khz and called. Fortunately there was little traffic as it was near the end of the DXpedition. After several tries I finally heard my call then flipped back to my transmitting frequency and gave the report then tried to get back to N8S's frequency. The contact was almost blind for me as I was not sure N8S heard my report. Later I checked the online log and found my call listed. Everything required a great deal of luck and timing. I was amazed at my good luck. This is one of those Don't try this at home ideas. Mike, AC4UR http://sunbyrdpress.blogspot.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] Working Split with a K1
Anyone who owns a K1 and has tried to work DX with it quickly realizes that this radio, unlike the K2/K3/KX3, doesn’t have multiple VFOs. All that you have at your disposal is RIT and XIT. The most obvious method when tuning a DX station working SPLIT is to engage the XIT to move your Transmit frequency somewhere into the range (usually 1 to 2 Khz up) where the DX station is listening. Last night I was tuning around on 30m and encountered a TG9 station working SPLIT UP 2. When I went to engage the XIT on my K1 I realized that at some point I had overridden the front panel XIT with a PFn function for spotting. A quick trip through the menus didn’t reveal how to enable XIT. What I then did was to note the DX stations TX frequency, tuned up about 2KHZ to a clear spot then I enabled RIT and moved my RX frequency back to listen to the TG9 using the RIT offset. A couple of calls later and he was in the log … not a bad catch for 5 watts. It occurred to me after that there is one big advantage of using RIT in this scenario; you can actually hear the frequency you are transmitting on by temporarily disabling RIT. Anyone who DXes at QRP power levels knows how important that this is as the DX station is not going to hear your measly 5W unless you are totally in the clear. In this case the RIT button acts like an A/B button, allowing you to switch between listening to your RX and TX frequencies. Using XIT doesn’t give you this capability. The one obvious negative side-effect of using RIT over XIT in this sort of scenario is that the RIT offset is referenced off of your VFO frequency. This means if you move the VFO to change your TX frequency you have to readjust the RIT as well or you will lose the DX station. Presumably if you are trying to work DX at 5W, you have picked a station that is reasonably strong (otherwise your are likely wasting your time) so finding him again shouldn’t be a big issue. The moral of the story is, as the old saying goes, “There is more than one way to skin a cat”. Michael VE3WMB / VA2NB __ 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 bugs
I just tried increasing mine to 10 and even 100 and itstill transmits when doing from Data to AM with VOX on. From: Howard Stephenson hlstephen...@gmail.com To: elecraft@mailman.qth.net Sent: Saturday, January 17, 2015 10:55 PM Subject: Re: [Elecraft] K3 bugs Try increasing your ANTIVOX level to about 10 and see if that stops the momentary TX when going from DATA to AM with VOX on. 73 Howard K6IA __ 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 hlyin...@yahoo.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 bugs
I wonder... Has anyone looked at the input to the vox circuit... before, during and after changing from data to am? Is there a signal or a static dc impulse there that triggers the vox? Have a great day, --... ...-- Dale - WC7S in Wy __ 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 tuning power question
Neil, Yes, the same thing applies to the K2/100 73, Don W3FPR On 1/17/2015 9:41 PM, Neil Martinsen-Burrell wrote: Would the same reasoning apply to the K2/100 as well? I have recently acquired one and would like to take good care of the final transistors (after a scary experience of trying to test power output while using the wrong antenna connector). I know that 20W is the default with the tune button, but one could then adjust it with the power knob. __ 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] Diversity reception in the K3
The frequencies of the two receivers in the K3 are locked together for diversity by sending identical instructions to the two identical synthesizers which also share the same clock oscillator. RF phase doesn't need to be coherent for diversity reception as implemented in the K3, because the two signals are only combined at audio frequency (usually between the operator's ears). There may be small difference in time delay (group delay) through the roofing filters in the two receivers but in practice this doesn't seem to be a problem. 73 from Ian GM3SEK -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DaleJ Sent: 18 January 2015 09:28 To: Elecraft@mailman.qth.net Subject: [Elecraft] Diversity reception in the K3 Going beyond pushing a button, could someone explain how diversity reception is accomplished in the K3? How are the two receivers locked together, phase coherently. Tnx 73 Dale, K9VUJ __ 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 gm3...@ifwtech.co.uk __ 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] Diversity reception in the K3
I use diversity receive quite a bit. It was actually the main thing that got me looking at a K3 in the first place…great feature. -Greg NY6C On Jan 18, 2015, at 5:48 AM, Ian White gm3...@ifwtech.co.uk wrote: The frequencies of the two receivers in the K3 are locked together for diversity by sending identical instructions to the two identical synthesizers which also share the same clock oscillator. RF phase doesn't need to be coherent for diversity reception as implemented in the K3, because the two signals are only combined at audio frequency (usually between the operator's ears). There may be small difference in time delay (group delay) through the roofing filters in the two receivers but in practice this doesn't seem to be a problem. 73 from Ian GM3SEK -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DaleJ Sent: 18 January 2015 09:28 To: Elecraft@mailman.qth.net Subject: [Elecraft] Diversity reception in the K3 Going beyond pushing a button, could someone explain how diversity reception is accomplished in the K3? How are the two receivers locked together, phase coherently. Tnx 73 Dale, K9VUJ __ 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 gm3...@ifwtech.co.uk __ 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 gmil...@sonic.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
Re: [Elecraft] Diversity reception in the K3
Ian, My impression is that the two received signals are in phase-lock at the first IF before the roofing filters. I export both IF outputs to a pair of LP-Pan that are run by one xtal oscillator so their baseband IQ outputs are locked in phase for use in my adaptive dual-pol receiving system (using MAP65 sw). With two phase-locked IQ streams polarity angle information can be determined by special sw routines that compare the relative amplitude of two orthogonally polarized signals. I use this for 2m-eme but it could be used with any two orthogonally polarized antennas (eg on HF: to horz dipoles at right angles to each other). 73, Ed - KL7UW http://www.kl7uw.com/MAP65.htm -- From: Ian White gm3...@ifwtech.co.uk To: 'DaleJ' dal...@mac.com, Elecraft@mailman.qth.net Subject: Re: [Elecraft] Diversity reception in the K3 Message-ID: 003001d0331d$2016aed0$60440c70$@co.uk Content-Type: text/plain; charset=us-ascii The frequencies of the two receivers in the K3 are locked together for diversity by sending identical instructions to the two identical synthesizers which also share the same clock oscillator. RF phase doesn't need to be coherent for diversity reception as implemented in the K3, because the two signals are only combined at audio frequency (usually between the operator's ears). There may be small difference in time delay (group delay) through the roofing filters in the two receivers but in practice this doesn't seem to be a problem. 73 from Ian GM3SEK 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] Elecraft CW Net Announcement
Good Day, I was unable to send email last night due to the heavy storm. When the clouds get thick around the top of this mountain my Internet connection gets very weak. Even though the tower is less than 1/2 a mile away nothing gets through to me. Luckily the torrential rains and 50 mph winds have died down. Now it is just raining, not pouring down so fast it is hard to see across the yard. However, Oregon does have sunny days unlike what you may imagine. In fact it was sunny only a few days ago. Propagation has been very good lately. I expect that to continue for today. Please join us this afternoon and evening. 14050 kHz at 2300z Sunday (3 PM PST Sunday) 7045 kHz at 0200z Monday (6 PM PST Sunday) 73, Kevin. KD5ONS - __ 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 bugs
No problem here - VOX Gain = 30, AntiVOX = 0. How high is your VOX Gain? 73, ... Joe, W4TV On 2015-01-18 9:37 AM, Harry Yingst via Elecraft wrote: I just tried increasing mine to 10 and even 100 and itstill transmits when doing from Data to AM with VOX on. From: Howard Stephenson hlstephen...@gmail.com To: elecraft@mailman.qth.net Sent: Saturday, January 17, 2015 10:55 PM Subject: Re: [Elecraft] K3 bugs Try increasing your ANTIVOX level to about 10 and see if that stops the momentary TX when going from DATA to AM with VOX on. 73 Howard K6IA __ 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 hlyin...@yahoo.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 li...@subich.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] Buggy software OT
Guys, time to end this Ot thread. In the future, please do not wait for me to step in. I can't watch the list continually if you also expect us to ship products to you quickly ;-) Self moderate after an OT thread has gone past 5-10 postings. Eric Elecraft list moderator etc. elecraft.com _..._ On Jan 17, 2015, at 7:32 PM, Guy Olinger K2AV k2av@gmail.com wrote: On Sat, Jan 17, 2015 at 4:40 PM, Dick Dievendorff d...@elecraft.com wrote: Software work helps one with humility... If software developing hasn't already beaten one into mumbling and slurring of words without any assistance from the juice. I remember so many days going home with a splitting headache, literal pain. 73, Guy. __ 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 elist_c...@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] Working Split with a K1
A while back I found a writeup that Wayne did on using the K1 RIT/XIT. It mimics the A/B switching of two VFOs. 1. With RIT XIT off, tune in the DX station. 2. Tap RIT and using the RIT knob, tune to a clear spot in the pileup. 3. Hold XIT. Now you are listening to the DX and transmitting in your clear spot - just like a A/B VFO swap. Slick! 72, Brian, K0DTJ __ 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 used K3
Looking for a K3 to pair with my K3/0 and RemoteRig. Private email what you might have. k1uo at arrl dot 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
Re: [Elecraft] K3 bugs
My VOX Gain was 15 and Anti VOX was 10 I tested at your settings VOX Gain= 30 and Anto VOX = 0 and the issue is still present I'm running the latest Non-Beta FW (uC 04.86, d1 02.83, FL 01.15, dr 01.03) From: Joe Subich, W4TV li...@subich.com To: elecraft@mailman.qth.net Sent: Sunday, January 18, 2015 12:28 PM Subject: Re: [Elecraft] K3 bugs No problem here - VOX Gain = 30, AntiVOX = 0. How high is your VOX Gain? 73, ... Joe, W4TV On 2015-01-18 9:37 AM, Harry Yingst via Elecraft wrote: I just tried increasing mine to 10 and even 100 and itstill transmits when doing from Data to AM with VOX on. From: Howard Stephenson hlstephen...@gmail.com To: elecraft@mailman.qth.net Sent: Saturday, January 17, 2015 10:55 PM Subject: Re: [Elecraft] K3 bugs Try increasing your ANTIVOX level to about 10 and see if that stops the momentary TX when going from DATA to AM with VOX on. 73 Howard K6IA __ 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 hlyin...@yahoo.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 li...@subich.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 hlyin...@yahoo.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 - K3 Help needed Cocomodem+MacBookAir+PSK31
If you are using this config, I could use some help with setup, offline email please. Current config is K3/100 to iMic to MacBookAir 13 to CocoModem. I/O from K3 to iMic (set on ‘mic’ position) external sound card, to USB port on MBA. I/O audio on Mac set to external USB device. Can get waterfall image on Cocomodem, but very faint signals, none readable. Can hear signals on K3. Seems to be a input level problem. Followed K3 Manual for PSK31 setup. Line out level does not seem to matter. Cocomodem settings worked a couple of years ago with Desktop iMac and my K3. Running out of ideas, but it is probably something simple I overlooked Thanks in advance for any advice. 73 Randy - K6CRC k6cr...@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] List of K1 modifications
Does anyone have a list of all K1 mods (those approved by Elecraft and those that others have installedOR the URL of a site that does and can vector me to? Thank you, in advance, for your assistance. 72, Jim Rodenkirch __ 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] Diversity reception in the K3
Me too. Some people think it is primarily useful on low bands, but I use it on all the bands 40 thru 10 meters (which are the only ones I currently have antennas for). I am using an R8 vertical for transmitting and one RX channel, and a Pixel Loop for the other channel. They are only about 25 feet (7.6 m) apart and are both vertically polarized, but there is definitely a diversity effect. I find that QSB is greatly reduced and CW copy is much better with diversity active. The only times I don't use it are when there is too much noise on the vertical or when I need the subreceiver for a pileup. On 18 Jan 2015 20:48, Greg Miller wrote: I use diversity receive quite a bit. It was actually the main thing that got me looking at a K3 in the first place…great feature. -Greg NY6C On Jan 18, 2015, at 5:48 AM, Ian White gm3...@ifwtech.co.uk wrote: The frequencies of the two receivers in the K3 are locked together for diversity by sending identical instructions to the two identical synthesizers which also share the same clock oscillator. RF phase doesn't need to be coherent for diversity reception as implemented in the K3, because the two signals are only combined at audio frequency (usually between the operator's ears). There may be small difference in time delay (group delay) through the roofing filters in the two receivers but in practice this doesn't seem to be a problem. 73 from Ian GM3SEK -- 73, Vic, 4X6GP/K2VCO Rehovot, Israel http://www.qsl.net/k2vco/ __ 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] Diversity reception in the K3
Thanks for that information, Ed. While the LO frequency remains constant, the two LOs will be locked in phase so the RF signal streams will be locked in phase as well. The relative phase may be arbitrary, depending on exactly how the two separate sets of synthesizer tuning instructions were loaded and then executed, but MAP65 will probably factor out any fixed phase differences. 73 from Ian GM3SEK -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward R Cole Sent: 18 January 2015 19:13 To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Diversity reception in the K3 Ian, My impression is that the two received signals are in phase-lock at the first IF before the roofing filters. I export both IF outputs to a pair of LP-Pan that are run by one xtal oscillator so their baseband IQ outputs are locked in phase for use in my adaptive dual-pol receiving system (using MAP65 sw). With two phase-locked IQ streams polarity angle information can be determined by special sw routines that compare the relative amplitude of two orthogonally polarized signals. I use this for 2m-eme but it could be used with any two orthogonally polarized antennas (eg on HF: to horz dipoles at right angles to each other). 73, Ed - KL7UW http://www.kl7uw.com/MAP65.htm -- From: Ian White gm3...@ifwtech.co.uk To: 'DaleJ' dal...@mac.com, Elecraft@mailman.qth.net Subject: Re: [Elecraft] Diversity reception in the K3 Message-ID: 003001d0331d$2016aed0$60440c70$@co.uk Content-Type: text/plain; charset=us-ascii The frequencies of the two receivers in the K3 are locked together for diversity by sending identical instructions to the two identical synthesizers which also share the same clock oscillator. RF phase doesn't need to be coherent for diversity reception as implemented in the K3, because the two signals are only combined at audio frequency (usually between the operator's ears). There may be small difference in time delay (group delay) through the roofing filters in the two receivers but in practice this doesn't seem to be a problem. 73 from Ian GM3SEK 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
