Re: Re[Elecraft] ading/Posting to Elecraft list?
Deni F5VJC wrote: > > and as you can see I'm posting from Nabble, the only method that seems to > work for me. > > Would someone informed please advise the best/easiest way to view and post > to Elecraft? > > I use Nabble too and find that is the best way for me. I see no point in receiving individual emails or digests because nowadays more than 50% of the posts nowadays are of no interest. Using Nabble I can scan the subject headers and only browse the threads of interest. If I don't bother to read them then I'm not nagged by seeing "x unread messages" and if I go away then I don't have to download hundreds of messages that I'll probably never have time to read when I get back. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/Reading-Posting-to-Elecraft-list--tp837513p838311.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 Harmonic Distortion
The measurements that have been made seem to suggest that the problem is not regular distortion or clipping. I am wondering if it is some kind of quantisation effect due to the fact that the signal processing is digital or analog? I am thinking of the fact that there are people who claim that vinyl (analog) LPs sound better than CDs, and FM radio sounds better than DAB. Personally I find it hard to understand what the complaints are about. SSB signals usually have quite a lot of distortion in any case, due to compression and ALC and the fact that they are transmitted through an amplifier whose response would certainly not be described as "linear" by any hi-fi buff, not to mention any multipath distortion effects introduced by the ionosphere. It's hard to imagine what the K3 could be doing to the signal to make it sound worse. I just don't expect hi-fi audio when listening to the ham bands. Perhaps the K3 is allowing you to hear the original signal "warts and all", much as a top-end hi-fi would make recordings that were acceptable on average equipment sound unpleasant? I do find the K3 audio to have rather too good a frequency response, and so on mine I have used the RX equalization to cut the topmost frequency by -16dB and the next one down by -8dB, which to my ears gives a much more restful sound. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Harmonic-Distortion-tp797780p838358.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] SOC Sprint This Saturday!
SECOND CLASS OPERATOR'S CLUB MARATHON SPRINT SOC Marathon Sprint Most sprints run four hours, but since we're Second Class Op's, we need more time! Date/Time: September 9, 2008, 1800Z through 2400Z Exchange: Member - RST, State/Province/Country, SOC Number Non-Member - RST, State/Province/Country, Power Out QSO Points: Member = 5 Points Non-Member, Different Continent = 4 Points Non-Member, Same Continent = 2 Points Multiplier: SPC (State/Province/Country) total for all bands. The same station may be worked on more than one band for QSO points and SPC credit. Power Multiplier: 0 - < 250 mW = X 15; 250 mW - < 1 Watt = X 10; 1 W - 5 W = X 7; Over 5 W = X 1. Suggested Frequencies: 160 Meters1810 kHz 80 Meters 3560 kHz 40 Meters 7030 kHz (also check 7040) 20 Meter 14060 kHz 15 Meters21060 kHz 10 Meters28060 kHz Score: Points (total for all bands) X SPCs (total for all bands) X Power Multiplier Apply an additional multiplier of 1.5 if using a homebrew paddle (kits such as the NorCal and AZ ScQRPions paddles qualify). All entries are Multi-Band to promote maximum participation. Entry includes a copy of the log and a separate summary sheet. Indicate total time-on-the-air, and include a legible name, call, SOC Number (if any) and address. All entries must be received within 30 days of the contest date. The highest output power used will determine the power multiplier. Include a description of homebrew equipment (including paddle or key), commercial equipment, and antennas used with each entry. Results may be posted on QRP-L and on the SOC Website. The final decision on all maters concerning the contest rests with the contest manager. Entries are welcome via E-Mail to N4BP: [EMAIL PROTECTED] or by snail mail to: Bob Patten, N4BP 2841 N.W. 112 Terrace Plantation, FL 33323 I'll be active as W1SOC as time allows. -- 73, Bob Patten, N4BPPlantation, FL E-Mail : [EMAIL PROTECTED]Website: http://www.qsl.net/n4bp SOC #1 ARS #799QRP ARCI #3412 FISTS #7871 FP #1491SMIRK #6625 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 Harmonic Distortion
This may be a glass half full response but being an old hearing impaired guy has it's positives: 1. Ignoring XYL when needed and excusing it by pointing to hearing aids. 2. Sleeping like a baby every night with said hearing aids removed. 3. Not hearing any distortion in my K3. Life is good 73, Bill NZ0T Julian, G4ILO wrote: > > The measurements that have been made seem to suggest that the problem is > not regular distortion or clipping. I am wondering if it is some kind of > quantisation effect due to the fact that the signal processing is digital > or analog? I am thinking of the fact that there are people who claim that > vinyl (analog) LPs sound better than CDs, and FM radio sounds better than > DAB. > > Personally I find it hard to understand what the complaints are about. SSB > signals usually have quite a lot of distortion in any case, due to > compression and ALC and the fact that they are transmitted through an > amplifier whose response would certainly not be described as "linear" by > any hi-fi buff, not to mention any multipath distortion effects introduced > by the ionosphere. It's hard to imagine what the K3 could be doing to the > signal to make it sound worse. I just don't expect hi-fi audio when > listening to the ham bands. > > Perhaps the K3 is allowing you to hear the original signal "warts and > all", much as a top-end hi-fi would make recordings that were acceptable > on average equipment sound unpleasant? I do find the K3 audio to have > rather too good a frequency response, and so on mine I have used the RX > equalization to cut the topmost frequency by -16dB and the next one down > by -8dB, which to my ears gives a much more restful sound. > -- View this message in context: http://n2.nabble.com/K3-Harmonic-Distortion-tp797780p838581.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 and KRC2
I seem to recall a posting that mentioned that there might be an upgrade so that the KRC2 can run at a faster baud rate. Is this true? If so, when might that be available? Thanks, Julius n2wn -- View this message in context: http://n2.nabble.com/K3-and-KRC2-tp838657p838657.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] SOC Marathon Sprint Correction
Let's try this again. In a truly Second Class moment, I thoroughly screwed up the date. The sprint will be held on September 13, a week from this Saturday. Mark your calendar (don't use mine!). SECOND CLASS OPERATOR'S CLUB MARATHON SPRINT SOC Marathon Sprint Most sprints run four hours, but since we're Second Class Op's, we need more time! Date/Time: September 13, 2008, 1800Z through 2400Z Exchange: Member - RST, State/Province/Country, SOC Number Non-Member - RST, State/Province/Country, Power Out QSO Points: Member = 5 Points Non-Member, Different Continent = 4 Points Non-Member, Same Continent = 2 Points Multiplier: SPC (State/Province/Country) total for all bands. The same station may be worked on more than one band for QSO points and SPC credit. Power Multiplier: 0 - < 250 mW = X 15; 250 mW - < 1 Watt = X 10; 1 W - 5 W = X 7; Over 5 W = X 1. Suggested Frequencies: 160 Meters1810 kHz 80 Meters 3560 kHz 40 Meters 7030 kHz (also check 7040) 20 Meter 14060 kHz 15 Meters21060 kHz 10 Meters28060 kHz Score: Points (total for all bands) X SPCs (total for all bands) X Power Multiplier Apply an additional multiplier of 1.5 if using a homebrew paddle (kits such as the NorCal and AZ ScQRPions paddles qualify). All entries are Multi-Band to promote maximum participation. Entry includes a copy of the log and a separate summary sheet. Indicate total time-on-the-air, and include a legible name, call, SOC Number (if any) and address. All entries must be received within 30 days of the contest date. The highest output power used will determine the power multiplier. Include a description of homebrew equipment (including paddle or key), commercial equipment, and antennas used with each entry. Results may be posted on QRP-L and on the SOC Website. The final decision on all maters concerning the contest rests with the contest manager. Entries are welcome via E-Mail to N4BP: [EMAIL PROTECTED] or by snail mail to: Bob Patten, N4BP 2841 N.W. 112 Terrace Plantation, FL 33323 -- 73, Bob Patten, N4BPPlantation, FL E-Mail : [EMAIL PROTECTED]Website: http://www.qsl.net/n4bp SOC #1 ARS #799QRP ARCI #3412 FISTS #7871 FP #1491SMIRK #6625 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: Re[Elecraft] ading/Posting to Elecraft list?
Deni and All, I agree with Don. If your email system allows you to sort your inbound emails, it can really make life much simpler. I use Outlook Express and/or Windows Mail (the Vista version of Outlook Express), which allows me to set up message rules that automatically direct various emails to various separate folders. There are several ways to sort your messages, so it's pretty flexible. I simply use the subject line by having the system divert all messages with the "Elecraft" designation go to a separate folder. That captures all messages coming from the Elecraft reflector. I get 40 to 50 messages a day from the Elecraft reflector (sometimes a lot more), and I can usually dispose of them fairly quickly by then just perusing the subject line for each. My delete key gets a lot of work, but it goes pretty fast. The problem I find with getting "digests" is that when you want to respond to a certain message, it becomes a lot more complicated, since not all digests provide a clear method for responding to just that one message you are interested in responding to. QTH.net is one of those that makes this difficult. Of course, it would be exponentially more helpful if folks would pay more attention to the subject line, but that's a battle that seems to be more like Don Quixote at the Windmill! Anyway, if you aren't using a method like the one I describe, you might consider at least trying it. Dave W7AQK - Original Message - From: "Don Wilhelm" <[EMAIL PROTECTED]> To: "Deni F5VJC" <[EMAIL PROTECTED]> Cc: Sent: Wednesday, September 03, 2008 5:55 PM Subject: Re: Re[Elecraft] ading/Posting to Elecraft list? Deni, For me, the very easiest method is to receive the individual emails. I have my mail client sort on "[Elecraft]" in the subject line and put all that meet the sort criteria into the Elecraft folder of my Inbox. So I have the equivalent of 'my own little digest', but they are individual emails. The messages are all there in my email until I delete them, so I can respond to any of them - Reply goes to the poster while Reply All will send it to the poster and the Elecraft list - I can edit the recipients if that is desired. I find it quicker to use the delete key on the individual messages that I am not interested in than to wade through a digest format to find those that I am interested in. 73, Don W3FPR Deni F5VJC wrote: This is getting way too complicated. I have been reading and posting to the Elecraft reflector, list or whatever you call it now since 2000 when I discovered Elecraft and built my K2. Right now with my K3 I'm getting increasingly confused as to the best/easiest way to view and post messages to the list/forum or whatever it's called now, and as you can see I'm posting from Nabble, the only method that seems to work for me. Would someone informed please advise the best/easiest way to view and post to Elecraft? I'd rather be playing K3 radio than messing with this stuff... 73, Deni ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Digital audio out ?
Hi, is there any possibility to grab a digital audio out signal (e.g. a PCM stream) out of the K3 ? Backgound is to get a digital audio out signal to send it via VoIP e.g. via an ethernet or wireless LAN connection into the internet without using a PC / soundcard. Any suggestions are welcome. 73 de Sascha, DH2SE -- View this message in context: http://n2.nabble.com/K3-Digital-audio-out---tp838886p838886.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Digital audio out ?
Not yet, I have an idea it's not legal in the US. Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: "DH2SE" <[EMAIL PROTECTED]> is there any possibility to grab a digital audio out signal (e.g. a PCM stream) out of the K3 ? Backgound is to get a digital audio out signal to send it via VoIP e.g. via an ethernet or wireless LAN connection into the internet without using a PC / soundcard. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: Re[Elecraft] ading/Posting to Elecraft list?
I do likewise, but Apple Mail automatically separates into different mailboxes for each account I use and I then sub-divide with a rule. I discard anything that has k2, k1, kx1 etc. but doesn't have K3, so I tend to just get general mail and K3 stuff (and everything in my trash stays there for 7 days anyway). It also has a pretty good black & white list. I don't use digests for the reason given by Dave and that Apple Mail is brilliant at threading, so after 10 posts on something I don't want to read, I just delete the whole lot with one click :-) 73 de M0XDF, K3 #174 -- Mathematics is the language with which God has written the universe. -Galileo Galilei, physicist and astronomer (1564-1642) On 4 Sep 2008, at 14:23, David Yarnes wrote: Deni and All, I agree with Don. If your email system allows you to sort your inbound emails, it can really make life much simpler. I use Outlook Express and/or Windows Mail (the Vista version of Outlook Express), which allows me to set up message rules that automatically direct various emails to various separate folders. There are several ways to sort your messages, so it's pretty flexible. I simply use the subject line by having the system divert all messages with the "Elecraft" designation go to a separate folder. That captures all messages coming from the Elecraft reflector. I get 40 to 50 messages a day from the Elecraft reflector (sometimes a lot more), and I can usually dispose of them fairly quickly by then just perusing the subject line for each. My delete key gets a lot of work, but it goes pretty fast. The problem I find with getting "digests" is that when you want to respond to a certain message, it becomes a lot more complicated, since not all digests provide a clear method for responding to just that one message you are interested in responding to. QTH.net is one of those that makes this difficult. Of course, it would be exponentially more helpful if folks would pay more attention to the subject line, but that's a battle that seems to be more like Don Quixote at the Windmill! Anyway, if you aren't using a method like the one I describe, you might consider at least trying it. For me, the very easiest method is to receive the individual emails. I have my mail client sort on "[Elecraft]" in the subject line and put all that meet the sort criteria into the Elecraft folder of my Inbox. So I have the equivalent of 'my own little digest', but they are individual emails. The messages are all there in my email until I delete them, so I can respond to any of them - Reply goes to the poster while Reply All will send it to the poster and the Elecraft list - I can edit the recipients if that is desired. I find it quicker to use the delete key on the individual messages that I am not interested in than to wade through a digest format to find those that I am interested in. 73, Don W3FPR Deni F5VJC wrote: This is getting way too complicated. I have been reading and posting to the Elecraft reflector, list or whatever you call it now since 2000 when I discovered Elecraft and built my K2. Right now with my K3 I'm getting increasingly confused as to the best/easiest way to view and post messages to the list/forum or whatever it's called now, and as you can see I'm posting from Nabble, the only method that seems to work for me. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Digital audio out ?
is there any possibility to grab a digital audio out signal (e.g. a PCM stream) out of the K3 ? Sorry, no. There is no path from the existing connectors to the DSP for such a stream, and we'd also have to deal with the correct framing for AES/EBU, etc. And then we'd have to deal with supporting 44.1 kHz bitstreams as well as 48kHz bitstreams, the meaning of all the user bits in the frames, etc. Not as simple as it might first appear :-/ 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: Re[Elecraft] ading/Posting to Elecraft list?
Thanks for the comments all. However I do already receive individual emails and filter then into an Elecraft folder which has sub folders for K2, K3, and a folderfor any messages from Eric, Wayne and Lyle (others can be added to this folder), this is all auto sorted by my own filters. The problem seems to be for me in posting or replying ( I have a googlemail address, is this the problem?) My posts don't seem to show up and I have to go to Nabble to post which does work. I'm trying this post in fact via my googlemail account to elecraft@mailman.qth.net to see if it shows up, it'a also Ccd. to a couple of others directly. If it doesn't show I will post again via Nabble. I'm looking to simplify my reading and posting to mainly the K3 list and don't of course want to miss any interesting mail. 73, Deni F5VJC David Yarnes wrote: Deni and All, I agree with Don. If your email system allows you to sort your inbound emails, it can really make life much simpler. I use Outlook Express and/or Windows Mail (the Vista version of Outlook Express), which allows me to set up message rules that automatically direct various emails to various separate folders. There are several ways to sort your messages, so it's pretty flexible. I simply use the subject line by having the system divert all messages with the "Elecraft" designation go to a separate folder. That captures all messages coming from the Elecraft reflector. I get 40 to 50 messages a day from the Elecraft reflector (sometimes a lot more), and I can usually dispose of them fairly quickly by then just perusing the subject line for each. My delete key gets a lot of work, but it goes pretty fast. The problem I find with getting "digests" is that when you want to respond to a certain message, it becomes a lot more complicated, since not all digests provide a clear method for responding to just that one message you are interested in responding to. QTH.net is one of those that makes this difficult. Of course, it would be exponentially more helpful if folks would pay more attention to the subject line, but that's a battle that seems to be more like Don Quixote at the Windmill! Anyway, if you aren't using a method like the one I describe, you might consider at least trying it. Dave W7AQK - Original Message - From: "Don Wilhelm" <[EMAIL PROTECTED]> To: "Deni F5VJC" <[EMAIL PROTECTED]> Cc: Sent: Wednesday, September 03, 2008 5:55 PM Subject: Re: Re[Elecraft] ading/Posting to Elecraft list? Deni, For me, the very easiest method is to receive the individual emails. I have my mail client sort on "[Elecraft]" in the subject line and put all that meet the sort criteria into the Elecraft folder of my Inbox. So I have the equivalent of 'my own little digest', but they are individual emails. The messages are all there in my email until I delete them, so I can respond to any of them - Reply goes to the poster while Reply All will send it to the poster and the Elecraft list - I can edit the recipients if that is desired. I find it quicker to use the delete key on the individual messages that I am not interested in than to wade through a digest format to find those that I am interested in. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Digital audio out ?
Simon (HB9DRV) wrote: > > Not yet, I have an idea it's not legal in the US. > > - Original Message - > From: "DH2SE" <[EMAIL PROTECTED]> >> >> is there any possibility to grab a digital audio out signal (e.g. a PCM >> stream) out of the K3 ? >> Backgound is to get a digital audio out signal to send it via VoIP e.g. >> via >> an ethernet or wireless LAN connection into the internet without using a >> PC >> / soundcard. >> > That would be *extremely* useful, though I imagine it's even less likely to happen than getting a serial protocol command to read the internally decoded CW/PSK31/RTTY. Whilst horizontally polarized a while ago I could only operate datamodes using remote desktop to my shack computer because that was the only operation I could do without audio. I can't imagine why it would be illegal in the US. Doesn't one of the Ten-Tec rigs have an Ethernet port that allows full remote control with streaming audio already? - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Digital-audio-out---tp838886p839189.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Added LIN OUT measurements
On Wed, 3 Sep 2008 21:37:00 -0700 (PDT), Paul Fletcher wrote: >I'm interested in the DSP and if >that is introducing the effect I'm hearing. The DSP is not operating at baseband audio either -- it is another IF just above the audio passband. The only way it's going to generate an audio product as distortion is the IM of two or more RF signals. 73, Jim K9YC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Digital audio out ?
48kHz would be enough, Windows takes care of the rest :-) Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: "Lyle Johnson" <[EMAIL PROTECTED]> And then we'd have to deal with supporting 44.1 kHz bitstreams as well as 48kHz bitstreams, the meaning of all the user bits in the frames, etc. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Harmonic Distortion
I haven't done the sort of testing that you must do for your applications, but I've used the OEP8000 transformers in several applications with good results for speech only. I've no idea of its high frequency response. They are tiny in comparison. http://www.oep.co.uk/admin/UploadDocuments/OEP8000.pdf David G3UNA I've ordered a couple of TTC-108 transformers today and will run some experiments with them over the next week or so. I've looked at similar transformers developed for modem and telephone line coupling, but not the TTC-108 specifically, when trying to find a cheaper output transformer to use with the Softrock Lite receivers. There, the emphasis was more on high frequency response, up to 100 KHz, but distortion was also a major issue. The solution of choice in my opinion for the Softrock receivers turns out to be a MILSPEC Triad transformer, SP-70, with excellent frequency response and quite low distortion. In single lot prices, an SD-70 costs about four times as much as a TTC-108. Jack ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 Digital audio out ?
I bought the K3 for its raw hamradio-transceiver performance. 73, Arie == Hi, is there any possibility to grab a digital audio out signal (e.g. a PCM stream) out of the K3 ? Backgound is to get a digital audio out signal to send it via VoIP e.g. via an ethernet or wireless LAN connection into the internet without using a PC / soundcard. Any suggestions are welcome. 73 de Sascha, DH2SE ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Harmonic Distortion
David: Even a rather poor transformer improves significantly when driven by a "zero ohm" source such as an op amp. The typical modem line transformers that are spec'd at 0.5% THD, for example, come in one to two orders of magnitude better when driven by a low impedance source. In fact, it's at the point where my lowest distortion audio generator (HP 200CD) isn't good enough to measure a $4 transformer when driven by an op amp. I'm generator limited at -63 dB at the moment. I hope to improve that measurement floor in the next week or so. Driving the same transformer with a 600 ohm source Z brings you back to the 0.5% THD range. It's all quite interesting and reminds me again that "it's not what you don't know that's the problem; rather it's what you think you know that bites you in the backside." Jack David Cutter wrote: I haven't done the sort of testing that you must do for your applications, but I've used the OEP8000 transformers in several applications with good results for speech only. I've no idea of its high frequency response. They are tiny in comparison. http://www.oep.co.uk/admin/UploadDocuments/OEP8000.pdf David G3UNA I've ordered a couple of TTC-108 transformers today and will run some experiments with them over the next week or so. I've looked at similar transformers developed for modem and telephone line coupling, but not the TTC-108 specifically, when trying to find a cheaper output transformer to use with the Softrock Lite receivers. There, the emphasis was more on high frequency response, up to 100 KHz, but distortion was also a major issue. The solution of choice in my opinion for the Softrock receivers turns out to be a MILSPEC Triad transformer, SP-70, with excellent frequency response and quite low distortion. In single lot prices, an SD-70 costs about four times as much as a TTC-108. Jack ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] [K3] Harmonic Distortion
>The "problems" people are having with "harmonics" when they listen to CW with a 2.7KHz filter/DSP setting seem to be easily solved by just reducing the DSP bandwidth. If you were paying attention to the spectrogram plots you would have noticed that the IMD and harmonic products are showing up far outside the bandwidth of the DSP filter, very far. The distortion products are being produced in the analog domain after the DSP digital to analog conversion. No amount of DSP tweaking will fix this. Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) K3-100 #508/ KX1 #1311 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Added LIN OUT measurements
Jim Brown-10 wrote: > > The DSP is not operating at baseband audio either -- it is another > IF just above the audio passband. The only way it's going to > generate an audio product as distortion is the IM of two or more RF > signals. > Jim, I completely understand the K3 architecture and that the DSP operates at a low IF. DSP is still software though and can still have bugs - no aspertions being cast just a simple statement. This can produce weird effects and analogies to analogue techiniques are only really applicable when describing DSP topologies - implementation is a whole different ball game. As I'm sure you are aware from your audio work (very interesting articles by the way) digital processing of any kind of signal introduces a raft of new pitfalls such as Nyquist aliasing, clock jitter, differing data formats etc etc. I see strange things happening that I cannot attribute to non-linear effects of the AF stage. Let me explain (maybe my fourier transform theory is a bit rusty - not used it for 20 years or so). As far as I can remember when a sine wave starts to clip odd order harmonics are introduced at varying phase and amplitude in relation to the fundamental, depending on the level of clipping. So far so good. Now, I have decoded a harmonically related PSK31 signal (i.e. a "ghost") with no problem whatsoever. This implies that the phase relationships are as per the "real" signal. Also the bandwidth of the ghost signal is exactly the same as the "real" signal with Lin out set at 4 (yes I realise this is not the phones output but trust me the ghost signal appears on the phones output as well). The thing that puzzles me is this. When a PSK signal is idling it is two tones a set frequency apart. For the purposes of this excercise let's say the tones are 150Hz and 200Hz. The third harmonic of each tone is 450Hz and 600Hz respectively so the ghost signal should have a bandwidth of 150Hz but it doesn't - it's still 50Hz (50Hz may not be the real spacing of the but you get my point). If my reasoning is off beam I would welcome an explaination (still learning something new each day). Regards, Paul -- View this message in context: http://n2.nabble.com/Added-LIN-OUT-measurements-tp834406p839684.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: using data modes with MixW
I participate in Army MARS nets where MT-63 is used in tandem with voice nets. I would like to be able to use the K3 Data mode to be able to automatically switch from microphone to line in and to automatically set the compression to 0.That seems to work but I see MixW display a frequency offset when the mode is changed and the transmission is indeed offset from where it would be just using SSB. The K3 considerately provides an option to combine the mic and line in inputs and doing that plus manually turning down the speech compression is a very reasonable work around but I am wondering if there is another trick in the K3 and or MixW that would allow the original plan of switching to data mode to work? Tom Whiteside N5TW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: using data modes with MixW
Tom Whiteside wrote: > > I am wondering if there is another trick in the K3 and or MixW that would > allow the original plan of switching to data mode to work? > You could get MixW to send a command to the K3 to turn down compression to 0 and back up when switching to receive - can't remember exactly how you do this in MixW but you can with a macro. Maybe a MixW expert on here can help? 73 Paul -- View this message in context: http://n2.nabble.com/K3%3A-using-data-modes-with-MixW-tp839835p839946.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: using data modes with MixW
Tom Whiteside wrote: > > I participate in Army MARS nets where MT-63 is used in tandem with voice > nets.I would like to be able to use the K3 Data mode to be able to > automatically switch from microphone to line in and to automatically set > the compression to 0.That seems to work but I see MixW display a > frequency offset when the mode is changed and the transmission is indeed > offset from where it would be just using SSB. > > The K3 considerately provides an option to combine the mic and line in > inputs and doing that plus manually turning down the speech compression is > a very reasonable work around but I am wondering if there is another trick > in the K3 and or MixW that would allow the original plan of switching to > data mode to work? > > MixW has an option to enter frequency offsets for each mode, so using that you might be able to compensate for the shift you are seeing. However I think the problem is basically because you are (I assume) using LSB for phone, whereas USB is used by the K3 for data. So I think you need to use the option in MixW that says default digi mode is RTTYR (i.e. reverse sideband.) That will make data use LSB. (Not knowing anything about MT-63 I don't know if that is OK - some modes work on either sideband others don't.) MixW will display a different frequency in data mode, because it shows the frequency of the actual data transmission (i.e. carrier + audio offset) not simply the frequency of the suppressed carrier, as it does in SSB. But it will not actually change the transceiver frequency switching from LSB to RTTYR. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3%3A-using-data-modes-with-MixW-tp839835p839964.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Digital audio out ?
Simon (HB9DRV) wrote: > > 48kHz would be enough, Windows takes care of the rest :-) > A raw bitstream of whatever sample rate the K3 uses would be fine, and processing it would not be limited to Windows. However if there is no way for the firmware to access the data I guess that's the end of it. :( - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Digital-audio-out---tp838886p839976.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [K3] [Elecraft] Harmonic Distortion
Mike Scott-7 wrote: > >>The "problems" people are having with "harmonics" when they listen to CW > with a 2.7KHz filter/DSP setting seem to be easily solved by just reducing > the DSP bandwidth. > > If you were paying attention to the spectrogram plots you would have > noticed > that the IMD and harmonic products are showing up far outside the > bandwidth > of the DSP filter, very far. The distortion products are being produced in > the analog domain after the DSP digital to analog conversion. No amount of > DSP tweaking will fix this. > > I am looking, right now, at the second harmonic of a CW signal. The signal is at 660Hz audio frequency, the harmonic is at 1320Hz. The "problem" is not solved by reducing the DSP bandwidth. That simply makes it more apparent, because the harmonics then show up against a dark background whereas with a wider setting, noise would mask them unless they are extremely strong. I should point out that with a normal sound card program I have to turn the line output up to an excessive level to see these harmonics on the waterfall. And I certainly can't detect their presence audibly. So I don't think this low level harmonic distortion is a problem, even for PSK decoders. These harmonics do seem to cause some confusion to the CW Skimmer program. But I guess that most people who are willing to pay $75 for that software will be using it from an IF output to get a wide bandwidth, not the K2 audio feed, bypassing the problem. I don't think this issue has anything to do with the unpleasant distortion that a few have been complaining of. It has been suggested to me that this is caused by some DSP artifacts occurring at around 12KHz and not harmonically related to the signal. That is probably higher than most of us can hear, which is why there have been few complaints about it. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/Harmonic-Distortion-tp839544p840044.html Sent from the [K3] mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Added LIN OUT measurements
> Maybe I wasn't clear what I was asking. I was asking for a > carrier to be injected that produced an audio tone of less > than 900Hz so that the third harmonic of that was within the > passband. I'm interested in the DSP and if that is > introducing the effect I'm hearing As has been stated a dozen times in a dozen different ways, what you are hearing is simply the effect of overdriving the audio amplifiers. I posted the following table showing harmonic distortion products for the speaker amplifier the other day: > The following table shows harmonic levels relative to a 500 Hz > reference tone at the given voltage across an 8 Ohm speaker. > 0 dB is 1V Peak (.7V RMS). +10 dB represents 2.25V RMS (signal > + distortion). +13 dB is 3.2V RMS (the speaker amplifier is in > the compression region at the threshold of clipping) and +15 > dB is 4V RMS (the speaker amplifier is in hard clipping). > > Reference2nd 3rd 4th 5th 6th 7th 8th 9th > > +15 dB -37 -15 -45 -26 -60 -43 -51 -37 > +13 dB -49 -31 -51 -35 -57 -39 -63 -49 > +10 dB -70 -68 -95 -67 -85 -69 -85 -73 > 0 dB -66 -74 -70 -77 -73 -76 -77 -80 > -10 dB -54 -66 -63 -90 -73 -82 -80 -87 > -20 dB -50 -78 -68 -74 -73 -74 -74 -78 > > In order to drive the audio amplifier hard enough to create > the distortion, it was necessary to disable the AGC or set > AGC SLP to low values (reduce the AGC reduction for strong > signals). Until the level is increased to the point that the amplifier is in compression and/or clipping, harmonic levels are extremely low. Here is a similar set of data points for the headphone output: 8 Ohm (old Yaesu) headset Reference2nd 3rd 4th 5th 6th 7th 8th 9th -6 dB -60 -36 -74 -37 -73 -39 -75 -44 -7 dB -60 -69 -79 -75 -85 -77 -87 -81 -10 dB -61 -69 -82 -60 -73 -66 -87 -80 -20 dB -72 -60 -73 -66 -74 -70 -75 -74 -30 dB -61 -56 -63 -64 -65 -67 -66nf 32 Ohm (computer) headset Reference2nd 3rd 4th 5th 6th 7th 8th 9th +1 dB -62 -20 -68 -28 -82 -50 -70 -46 0 dB -62 -73 -89 -79 -90 -84 -94 -86 -10 dB -70 -66 -80 -73 -85 -80 -86 -81 -20 dB -72 -60 -73 -66 -74 -70 -75 -74 -30 dB -52 -52 -52nf -54 -60 -55nf 200 Ohm (Heil Proset) headset Reference2nd 3rd 4th 5th 6th 7th 8th 9th +4 dB -64 -48 -90 -47 -84 -50 -80 -53 +3 dB -65 -79 -95 -86 -98 -93 -97 -93 0 dB -68 -79 -82 -84 -86 -80 -84 -83 -10 dB -76 -75 -82 -86 -84nf -86nf -20 dB -72 -80 -73nf -75nf -76nf 0 dB is 770 mV RMS (1V Peak) measured for the reference tone across the headphone element - total audio level will be somewhat higher with distortion/noise. Note: in every case harmonic levels are extremely low, generally down more than 60 dB right to the point that the headphone amplifier goes into compression/clipping. "nf" indicares harmonic product not measurable (in the noise floor). The table shows the harmonic levels at maximum "linear" output and again with the reference tone raised just 1 dB above the clipping point. Now my ears are not "young" and have some loss from more than 30 years around control room monitors that were always "too loud" and the many hours around the big pumps/blowers in the TV transmitter sites. Still, with all of the tested headphones the audio level is nearly painful at least 3 dB before the amplifier went into clipping and the harmonic products exceed -60 dB. Based on these and previous tests, anyone who can not get adequate headphone levels without distortion should be look- ing for more efficient headphones and/or loudspeakers. 73, ... Joe, W4TV > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Paul Fletcher > Sent: Thursday, September 04, 2008 12:37 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] Added LIN OUT measurements > > > > Jim, > > Maybe I wasn't clear what I was asking. I was asking for a > carrier to be injected that produced an audio tone of less > than 900Hz so that the third harmonic of that was within the > passband. I'm interested in the DSP and if that is > introducing the effect I'm hearing. As for the difference > between impedance and resistance your point is duly noted and > the only way this could be achieved is to use a s
RE: [Elecraft] K3 Harmonic Distortion
Julian, > The measurements that have been made seem to suggest that the > problem is not regular distortion or clipping. I disagree. Every set of measurements I have made shows the speaker and headphone amplifiers in the K3 are very clean right up to the point that they begin to clip. Those who can not get sufficient "clean" audio should be looking for more efficient headphones or higher power external amplifiers. 73, ... Joe, W4TV > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Julian, G4ILO > Sent: Thursday, September 04, 2008 5:20 AM > To: elecraft@mailman.qth.net > Subject: RE: [Elecraft] K3 Harmonic Distortion > > > > The measurements that have been made seem to suggest that the > problem is not regular distortion or clipping. I am wondering > if it is some kind of quantisation effect due to the fact > that the signal processing is digital or analog? I am > thinking of the fact that there are people who claim that vinyl > (analog) LPs sound better than CDs, and FM radio sounds > better than DAB. > > Personally I find it hard to understand what the complaints > are about. SSB signals usually have quite a lot of distortion > in any case, due to compression and ALC and the fact that > they are transmitted through an amplifier whose response > would certainly not be described as "linear" by any hi-fi > buff, not to mention any multipath distortion effects > introduced by the ionosphere. It's hard to imagine what the > K3 could be doing to the signal to make it sound worse. I > just don't expect hi-fi audio when listening to the ham bands. > > Perhaps the K3 is allowing you to hear the original signal > "warts and all", much as a top-end hi-fi would make > recordings that were acceptable on average equipment sound > unpleasant? I do find the K3 audio to have rather too good a > frequency response, and so on mine I have used the RX > equalization to cut the topmost frequency by -16dB and the > next one down by -8dB, which to my ears gives a much more > restful sound. > > - > Julian, G4ILO. K2 #392 K3 #222. > http://www.g4ilo.com/ G4ILO's Shack > http://www.ham-directory.com/ Ham > Directoryhttp://www.g4ilo.com/kcomm.html KComm for > Elecraft K2 and K3 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 - Toroids
I just wound my first toroid for the K2. It is supposed to be RFC14, 18microhenries, 10 turns. I measured the inductance with my LC Meter IIB and it measures 31 microhenries. Is this okay? Should I remove turns until it is correct??? Ron ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 - Toroids
I just wound my first toroid for the K2. It is supposed to be RFC14, 18microhenries, 10 turns. I measured the inductance with my LC Meter IIB and it measures 31 microhenries. Is this okay?... Use the number of turns as your guide. Measured inductance may vary depending on the frequency you are exciting the toroid with when measuring versus the core material of the toroid and the frequency at which the inductance is specified. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 - Toroids
Ron, The most important parameter is the number of turns and the core type. The inductance shown in the schematic may not be correct for all cases. That particular RFC used to be a molded inductor and was changed to a toroid, but the schematic was apparently not updated with the new value. In all cases, the values shown in the text are correct. In this case it is the number of turns that are important. You may update your schematic with your measured value if you wish. 73, Don W3FPR Ron McCurdy wrote: I just wound my first toroid for the K2. It is supposed to be RFC14, 18microhenries, 10 turns. I measured the inductance with my LC Meter IIB and it measures 31 microhenries. Is this okay? Should I remove turns until it is correct??? Ron ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.6.16/1651 - Release Date: 9/4/2008 6:57 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 RTTY
I've decided to take the plunge into digital modes and 'found' the RTTY mode (and extra set of filters) in the SEC menu. There is still much about my 1 year old K2 that I'm still finding out. What a radio! When I went in to set the filters in RTTY mode and decided to check the SSB filters as well. Using Spectogram, I cannot ajust anything to make the 300 cycle point at -60 db down. I CAN adjust it such that it is -60 db down at 2500 hz. There appears to be no low frequency roll-off at all. Adusting the BFO moves the high frequency point; it does not move the low frequency point. My setup: K2# 6110. AF option is OFF and switched out of the circuit. I'm using the External Speaker Output to drive the sound card. I don't see this porblem with the CW filters. Is this normal? Received SSB signals sound fine. 73, Clark KE4RQ Don Wilhelm-3 wrote: > > JT, > > There is nothing wrong with AFSK - in fact, if the carrier balance on > the KSB2 board is adjusted correctly, AFSK is indistinguishable from FSK. > > The only 'problem' with the K2 is that the BFO range is limited, with > the result that narrow filters cannot be set with a center frequency > equal to the 'true RTTY' tones. MTTY and other soundcard RTTY programs > offer a selection of tone frequencies - so if you align your narrow RTTY > filters to at 800 or 1000 Hz, MTTY can accommodate that center > frequency. When I set up RTTY filters on a K2, I set the FL1 filter the > same as the SSB filter and then set FL2 at 1.00 kHz, FL3 at 0.70 and FL4 > at 0.400. The narrow filters are centered at either 1000 Hz (or 800 Hz > if the BFO range will not accommodate 1000 Hz for the 0.40 filter on > both sidebands). In operation, the RTTY signal is tuned to center on > 1000 Hz (or 800 Hz) and the program will decode the signal - > transmission will occur at the same offset and noone on the receiving > end will know whether you are using real FSK or AFSK. > > So the short answer is: the K2 will operate just fine on RTTY, and yes, > you can use narrow RTTY filters to minimize the QRM. > > 73, > Don W3FPR > > John Tobias Croteau wrote: >> How well does the K2 work in RTTY mode? I presume it is AFSK only? I >> seem to recall that some do not recommend the K2 for serious RTTY >> operating but I don't remember the reasoning behind this. I vaguely >> recall reading this about 2 years ago from somewhere. >> >> I'm a RTTY operator first then SSB. I've never been good with CW and >> probably never will so I focus on these two modes. I know it's a poor >> attitude but let's just not go there, at least I am honest about it. >> Most of my RTTY operation is centered around contest weekends simply >> because I can only operate portable due to antenna limitations at the >> home QTH. However, I am not a hardcore contester. I merely operate >> during the contests to maximize QSO numbers although getting a good >> score never hurts. >> >> Around August, I'm finally going to be able to upgrade to something in >> the K2 price range. Will the K2 be acceptable for the way I operate >> RTTY or should I hold out for a K3? I know the K3 will be a much >> better data rig. I can't really afford a K3 but I could probably make >> it happen. >> > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- View this message in context: http://n2.nabble.com/K2-RTTY-tp449714p840356.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Keying
Has anyone else noticed that there is a substantial difference in the mark space ratio of the keying dependent on whether you operate QSK/semi break in compared with manual transmit, eg push the transmit button on the front panel or use a foot switch to enter transmit. The QSK/semi break in are similar but they are much lighter than in the constant transmit mode. I did notice when I first got the K3 that the QSK/semi break in was light and I had to compensate for that in my keyer. Likewise the built in keyer seems to have a default setting to cater for the light keying. No great drama - just an observation. Just for general information I have just wired up my K3 to my FL7000 linear for auto band change as per the directions from W4TV back on 23 May. It works great but the tx inhibit is unusable in other than QSK. However I don't need it for proper operation and have turned it back off in the Config setting. 73 Barry VK2BJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 RTTY
I hope the group will pardon me while I engage in a bit of RTTY heresy. When you use a PC sound card for decoding RTTY, the center frequency is no longer important, just the tone spacings. With MTTY, I can pick any center frequency I want to use (typically 1000 Hz so I stay away from the roll-off) and tune until I see it in the MTTY spectrum window. I make any fine adjustments with the cursor to pick the signal I want if there are multiple signals shown. If I want a bandpass filter, I use the bandpass function in MTTY. MTTY uses the same audio frequency for encode as it used for decode so the signal is inherently locked to the received signal. It even has an AFC function to track any drift. Using just the SSB filter for receive and transmit avoids the problem of center frequency tracking between the SSB filter that is always used on transmit and whatever receive filter has been selected. It also has the advantage of allowing you to hear what is happening across the audio bandwidth so you know whether to go higher or lower for the next signal. Very useful in a contest. I use Writelog with the MTTY decoder for contests and the whole setup works very well. Using the mouse wheel for tuning and macros for the exchange, I rarely touch the K2 at all. Hope this helps. 73 Logan, KZ6O -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Clark Macaulay KE4RQ Sent: Thursday, September 04, 2008 7:39 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 RTTY I've decided to take the plunge into digital modes and 'found' the RTTY mode (and extra set of filters) in the SEC menu. There is still much about my 1 year old K2 that I'm still finding out. What a radio! When I went in to set the filters in RTTY mode and decided to check the SSB filters as well. Using Spectogram, I cannot ajust anything to make the 300 cycle point at -60 db down. I CAN adjust it such that it is -60 db down at 2500 hz. There appears to be no low frequency roll-off at all. Adusting the BFO moves the high frequency point; it does not move the low frequency point. My setup: K2# 6110. AF option is OFF and switched out of the circuit. I'm using the External Speaker Output to drive the sound card. I don't see this porblem with the CW filters. Is this normal? Received SSB signals sound fine. 73, Clark KE4RQ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Keying
By George, you're right! No, I never noticed it, but now that you point it out and I'm testing it -- sure enough. The difference is detectable to the ear, at 25 WPM anyway. A 'scope would tell you exactly what the difference is. Should be an easy bug to track down and fix (he said glibly, knowing nothing). :-) Put it on the list! Bill W5WVO - Original Message - From: "Barry Simpson" <[EMAIL PROTECTED]> To: "'Elecraft'" Sent: Thursday, September 04, 2008 9:46 PM Subject: [Elecraft] K3 Keying > Has anyone else noticed that there is a substantial difference in the mark > space ratio of the keying dependent on whether you operate QSK/semi break in > compared with manual transmit, eg push the transmit button on the front > panel or use a foot switch to enter transmit. > > > > The QSK/semi break in are similar but they are much lighter than in the > constant transmit mode. > > > > I did notice when I first got the K3 that the QSK/semi break in was light > and I had to compensate for that in my keyer. Likewise the built in keyer > seems to have a default setting to cater for the light keying. No great > drama - just an observation. > > > > Just for general information I have just wired up my K3 to my FL7000 linear > for auto band change as per the directions from W4TV back on 23 May. It > works great but the tx inhibit is unusable in other than QSK. However I > don't need it for proper operation and have turned it back off in the Config > setting. > > > > 73 > > > > Barry VK2BJ > > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Keying
Not on my K3 (1594) using internal keyer and FW 02.34 Exactly same in QSK, semi BK or PTT. 73 gl Jim SM2EKM Bill W5WVO wrote: By George, you're right! No, I never noticed it, but now that you point it out and I'm testing it -- sure enough. The difference is detectable to the ear, at 25 WPM anyway. A 'scope would tell you exactly what the difference is. Should be an easy bug to track down and fix (he said glibly, knowing nothing). :-) Put it on the list! Bill W5WVO - Original Message - From: "Barry Simpson" <[EMAIL PROTECTED]> To: "'Elecraft'" Sent: Thursday, September 04, 2008 9:46 PM Subject: [Elecraft] K3 Keying Has anyone else noticed that there is a substantial difference in the mark space ratio of the keying dependent on whether you operate QSK/semi break in compared with manual transmit, eg push the transmit button on the front panel or use a foot switch to enter transmit. The QSK/semi break in are similar but they are much lighter than in the constant transmit mode. I did notice when I first got the K3 that the QSK/semi break in was light and I had to compensate for that in my keyer. Likewise the built in keyer seems to have a default setting to cater for the light keying. No great drama - just an observation. Just for general information I have just wired up my K3 to my FL7000 linear for auto band change as per the directions from W4TV back on 23 May. It works great but the tx inhibit is unusable in other than QSK. However I don't need it for proper operation and have turned it back off in the Config setting. 73 Barry VK2BJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
