[Elecraft] K3 configuration question
Hello elecrafters, i ordered a K3 with the additional KBPF3 module for general Coverage. Do i need the additional AM Filter for listening to AM radiostations? or ist this AM Filter only neccessary for AM TX? Thanks for your configuration support. Michael, DC0ZO K2# 5619 ___ 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 PSK31 with Digipan
It finally dawned on me that the 6kHz filter could be put to work for soundcard modes in both transmit and receive by enabling ESSB and using USB or LSB instead of DATA A. Indeed, it works just fine with BW set to 4kHz and shift adjusted to put center at 1800 or so. With DM 780 set to max width (3.9 kHz) the waterfall just about fills the screen and there's almost 3.5 kHz bandwidth for transmit and receive. This gives a wider field for casual point and click PSK31 operation - nice for a simple setup like mine where there is no computer control of the radio, and I want to keep the knob twirling on the rig to a minimum (the interface consists only of 2 audio cables between laptop and rig with VOX keying. TX EQ flat, AGC and compressor disabled of course). Bob NW8L On Fri, Sep 19, 2008 at 5:43 PM, Dave Quick - KØEKL [EMAIL PROTECTED] wrote: Still, it would be nice to be able to at least see the full 6 KHz. Sort of like a mini-panadaptor. Perhaps it's time to order and LP-Pan! ___ 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] Toroids frequency range and baluns
On Fri, 19 Sep 2008 20:45:57 -0700, Ron D'Eau Claire wrote: Balun is an unfortunate, all-inclusive and misleading term. One so-called balun may be as different from another balun in its requirements and application as a motorcycle is different from railroad locomotive. Yes, it really is. I stand by my statement when talking about a choke balun consisting of a string of ferrite beads on some coax or a coaxial line on a coil form such as I described. The only losses caused by such a balun will be those of the transmission line itself, which cannot be ignored if the SWR is high. Yes on all counts. BUT -- the chokes wound as a coil are vastly superior. So-called baluns that transform impedances are, typically, transformers -- often transmission-line transformers. They're a whole different animal and can be very unpredictable, especially when they use ferrite or powdered iron cores and are exposed to a wide range of impedances. Yes. Again, poor use of words by the industry. 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
[Elecraft] 6 KHz filter and PSK31
Soundcarc modes have one large problem used this way; harmonics of low tones may produce a multiple (and unauthorized) signal in the passband. That's a good reason to use tones near the high frequency cutoff. And that's not counting transmit IMD. Cortland KA5S [Original Message] Date: Sat, 20 Sep 2008 00:40:38 -0600 From: Bob Cunnings [EMAIL PROTECTED] Subject: Re: [Elecraft] K3 PSK31 with Digipan To: elecraft@mailman.qth.net Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=ISO-8859-1 It finally dawned on me that the 6kHz filter could be put to work for soundcard modes in both transmit and receive by enabling ESSB and using USB or LSB instead of DATA A. Indeed, it works just fine with BW set to 4kHz and shift adjusted to put center at 1800 or so. With DM 780 set to max width (3.9 kHz) the waterfall just about fills the screen and there's almost 3.5 kHz bandwidth for transmit and receive. This gives a wider field for casual point and click PSK31 operation - nice for a simple setup like mine where there is no computer control of the radio, and I want to keep the knob twirling on the rig to a minimum (the interface consists only of 2 audio cables between laptop and rig with VOX keying. TX EQ flat, AGC and compressor disabled of course). Bob NW8L ___ 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 configuration question
You need it if you want to listen to an AM stations full bandwidth. You'll not hear the entire transmitted signal without it. You'll be able to hear talk stations or something like that just fine but for listening to music you'd probably find it lacking. Hopefully this helps you in making your decision. On Sat, 2008-09-20 at 08:36 +0200, Michael van Hauten wrote: Hello elecrafters, i ordered a K3 with the additional KBPF3 module for general Coverage. Do i need the additional AM Filter for listening to AM radiostations? or ist this AM Filter only neccessary for AM TX? Thanks for your configuration support. Michael, DC0ZO K2# 5619 ___ 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 USB TO SERIAL CABLE
I am using vista 64 on my laptop computer. Can anyone suggest where I might get a usb-serial cable with drivers for vista 64. Any Ideas welcome. 73 Norm VK4FNWG I bought the Elecraft USB adapter, and had to download the latest drivers when using it on my XP computer. When I upgraded to my current VISTA computer, VISTA automatically went out and found the latest drivers for me. I didn't have to do anything. Phil - AD5X ___ 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] : KRX3 Config
Hi Joe (W4TV), Direct reply to your message does not go through so I send it via the Reflector. I just checked again on my K3 : if the subreceiver is ON (tap SUB) and I hold BSET, the S-meter shows effectively the strength of the signal of the subreceiver. To change the settings of the subreceiver (e.g. of the filters), I select the appropriate config setting and then I tap SUB before selecting the value of the setting. The Crystal Filter setup method is described in the K3 Owner's manual (page 43 in my C1 version, dated 18 November 2007, or page 45 in the latest edition, D1, dated 27 July). The instructions for BSET can be found either on the second page of the KRX3 errata sheet sent by Elecraft with the KRX3 kit, or on page 37 of the K3 Owner's manual, version D1). Best regards 73 de Raymond, F4FNT K3/100 # 615, K2/100 #5,636 ___ 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 USB TO SERIAL CABLE
similar cable can be obtained from Hong Kong at USD12 only. I get one which works well with my K3. 73 Johnny Siu VR2XMC --- 2008年9月20日 星期六，Phil Debbie Salas [EMAIL PROTECTED] 寫道﹕ 寄件人: Phil Debbie Salas [EMAIL PROTECTED] 主題: [Elecraft] K3 USB TO SERIAL CABLE 收件人: elecraft@mailman.qth.net 日期: 2008 9 20 星期六 下午 6:55 I am using vista 64 on my laptop computer. Can anyone suggest where I might get a usb-serial cable with drivers for vista 64. Any Ideas welcome. 73 Norm VK4FNWG I bought the Elecraft USB adapter, and had to download the latest drivers when using it on my XP computer. When I upgraded to my current VISTA computer, VISTA automatically went out and found the latest drivers for me. I didn't have to do anything. Phil - AD5X 為了不斷提升Yahoo! Mail，雅虎香港誠邀你參與意見調查。請前往http://surveylink.yahoo.com/wix/p5429076.aspx 發表你的意見! ___ 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 related - non-linear audio transformer behavior
I've spent the last two weeks measuring and analyzing non-linear behavior of several audio transformers, focusing on the Tamura TTC-108 used as isolation transformers in the K3. My data and analysis is now available at http://www.cliftonlaboratories.com/non-linear_transformer_behavior.htm Jack K8ZOA www.cliftonlaboratories.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] Test message
Test, ignore... Dave ___ 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] Lost outgoing mail to this list, AVG anti-virus problem!
For a couple of days I've not been able to post to this list, phew thank goodness some may say! The reason turned out to be a tweak to my AVG anti-virus where it was checking outgoing e-mail and appending a message. I didn't get bounced e-mail, just nothing as if the mail went into a black hole. Anyway the problem is fixed by turning off the AVG outgoing e-mail check. 73 Dave, G4AON ___ 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 Perseus SDR panadapter/receiver
This week I bought a Perseus receiver and have it hooked up to my K3 via com0com and Ham Radio Deluxe to act as a panoramic display for the K3. I am not using the insensitive IF out of the K3, instead I am using a home made ferrite hybrid splitter on the KXV3 RX RF out/in of the K3, one port goes to the Perseus, the other to the KXV3 RF input (not the main antenna socket). The loss through the splitter is 3 dB. In order to run the above combination, the freeware program com0com (http://com0com.sourceforge.net/) is run to create virtual com ports 10 and 11 -instructions for doing this at the Sourceforge web site. Power up the K3 and the Perseus (including it's perseus.exe software). The the latest version of HRD should be run twice, one application controlling the K3, the other the Perseus. In HRD click the Synch button and link the two radios together. I use the Perseus as Master (sorry politically correct people, but that's what it's called). It works great with full dual receive and click and go, the K3 tunes within a hairs breadth of the Perseus which has the benefit of a 1ppm TCXO too. You can set the K3 as master and have the Perseus follow, but I mostly use the click and go where the Perseus drives the K3. The noise reduction of the Perseus is currently better, in my opinion, than that in the K3 when dealing with wide band white frying noise and the Perseus has synchronous AM - needless to say it works very well on those 80m AM stations and of course broadcast stations. The Perseus is more expensive by a long way than the simple Softrock receivers and LP-PAN, but it is darn good. 73 Dave, G4AON K3/100 #80 ___ 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 and Perseus SDR panadapter/receiver
Dave I imagine you examined several panadapters before opting for the fairly expensive Perseus. What were the persuading features that drew you to your choice? David G3UNA - Original Message - From: Dave G4AON [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Saturday, September 20, 2008 2:52 PM Subject: [Elecraft] K3 and Perseus SDR panadapter/receiver This week I bought a Perseus receiver and have it hooked up to my K3 via com0com and Ham Radio Deluxe to act as a panoramic display for the K3. I am not using the insensitive IF out of the K3, instead I am using a home made ferrite hybrid splitter on the KXV3 RX RF out/in of the K3, one port goes to the Perseus, the other to the KXV3 RF input (not the main antenna socket). The loss through the splitter is 3 dB. In order to run the above combination, the freeware program com0com (http://com0com.sourceforge.net/) is run to create virtual com ports 10 and 11 -instructions for doing this at the Sourceforge web site. Power up the K3 and the Perseus (including it's perseus.exe software). The the latest version of HRD should be run twice, one application controlling the K3, the other the Perseus. In HRD click the Synch button and link the two radios together. I use the Perseus as Master (sorry politically correct people, but that's what it's called). It works great with full dual receive and click and go, the K3 tunes within a hairs breadth of the Perseus which has the benefit of a 1ppm TCXO too. You can set the K3 as master and have the Perseus follow, but I mostly use the click and go where the Perseus drives the K3. The noise reduction of the Perseus is currently better, in my opinion, than that in the K3 when dealing with wide band white frying noise and the Perseus has synchronous AM - needless to say it works very well on those 80m AM stations and of course broadcast stations. The Perseus is more expensive by a long way than the simple Softrock receivers and LP-PAN, but it is darn good. 73 Dave, G4AON K3/100 #80 ___ 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 and Perseus SDR panadapter/receiver
Hello David A friend has a Perseus and he found it outperformed his TS480. The RadCom review of it puts the 3rd order IMD as 102 dB at any signal spacing (http://www.ssb.de/amateur/pdf/radcom_mar08.pdf for those who are not RSGB members), so it is not a second rate receiver in it's own right. I have not tried any other SDR receiver and was put off by the others needing a high grade sound card, the Perseus connects via USB and has an 800 KHz span rising to 1600 KHz in the next software release. It can store 800 KHz of any band from 10 KHz to 30 MHz to hard disk for replay later, using some 1.7 GB of disk space every 10 minutes. That bandwidth will work very well with CW skimmer, but my initial attempt fouled up the computer and needed an XP restore... I have a full backup of the hard disk so I'll have another go, some of the software fudges needed with these disconnected applications is tedious, no doubt in the not so distant future there will be some integration taking place. I understand Simon of Ham Radio Deluxe fame is already looking into further features with HRD. Note com0com and HRD work fine... 73 Dave, G4AON David Cutter wrote: Dave I imagine you examined several panadapters before opting for the fairly expensive Perseus. What were the persuading features that drew you to your choice? David G3UNA - Original Message - From: Dave G4AON [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Saturday, September 20, 2008 2:52 PM Subject: [Elecraft] K3 and Perseus SDR panadapter/receiver This week I bought a Perseus receiver and have it hooked up to my K3 via com0com and Ham Radio Deluxe to act as a panoramic display for the K3. I am not using the insensitive IF out of the K3, instead I am using a home made ferrite hybrid splitter on the KXV3 RX RF out/in of the K3, one port goes to the Perseus, the other to the KXV3 RF input (not the main antenna socket). The loss through the splitter is 3 dB. In order to run the above combination, the freeware program com0com (http://com0com.sourceforge.net/) is run to create virtual com ports 10 and 11 -instructions for doing this at the Sourceforge web site. Power up the K3 and the Perseus (including it's perseus.exe software). The the latest version of HRD should be run twice, one application controlling the K3, the other the Perseus. In HRD click the Synch button and link the two radios together. I use the Perseus as Master (sorry politically correct people, but that's what it's called). It works great with full dual receive and click and go, the K3 tunes within a hairs breadth of the Perseus which has the benefit of a 1ppm TCXO too. You can set the K3 as master and have the Perseus follow, but I mostly use the click and go where the Perseus drives the K3. The noise reduction of the Perseus is currently better, in my opinion, than that in the K3 when dealing with wide band white frying noise and the Perseus has synchronous AM - needless to say it works very well on those 80m AM stations and of course broadcast stations. The Perseus is more expensive by a long way than the simple Softrock receivers and LP-PAN, but it is darn good. 73 Dave, G4AON K3/100 #80 ___ 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 USB TO SERIAL CABLE
I'm using Vista x64. I have two adapters that use the Proliant chip. Vista recognized both of them and installed the drivers without my having to provide anything. One of the adapters worked but the other was very flaky. 73, Jim - W4BQP K2/100 #2268 Norm Greenaway wrote: I am using vista 64 on my laptop computer. Can anyone suggest where I might get a usb-serial cable with drivers for vista 64 Any Ideas welcome 73 Norm VK4FNWG ___ 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 USB TO SERIAL CABLE
Hi Norm, I run Vista64 Business Edition here and I have never been able to get updated Prolific drivers that work with my system (Lenovo T61 laptop). They do everything from BSD's to applications just hanging. I did purchase a single adapter cable with an FTDI chipset and it works FB. I also have a USB hub with an FTDI chipset and it works FB also. I believe I got them both from USBGear.com. It may very well be my system, but I have never had any luck with the Prolific chipsets. I know others have. YMMV. 73, Dave W8FGU -Original Message- From: [EMAIL PROTECTED] [mailto:elecraft- [EMAIL PROTECTED] On Behalf Of Norm Greenaway Sent: Friday, September 19, 2008 10:24 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 USB TO SERIAL CABLE I am using vista 64 on my laptop computer. Can anyone suggest where I might get a usb-serial cable with drivers for vista 64 Any Ideas welcome 73 Norm VK4FNWG ___ 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 related - non-linear audio transformer behavior
Jack: With regard to the plots under Comparisons and Conclusions, and also under Frequency Response Compared, is it possible to change the source Z from 600-ohms to 50-ohms and re-test? It would be an interesting exercise to see if THD (at ~ 1V RMS) and the high-end frequency response of the Bourns transformer changes significantly. Tnx! Paul, W9AC - Original Message - From: Jack Smith [EMAIL PROTECTED] To: 'Elecraft' elecraft@mailman.qth.net Sent: Saturday, September 20, 2008 8:02 AM Subject: [Elecraft] K3 related - non-linear audio transformer behavior I've spent the last two weeks measuring and analyzing non-linear behavior of several audio transformers, focusing on the Tamura TTC-108 used as isolation transformers in the K3. My data and analysis is now available at http://www.cliftonlaboratories.com/non-linear_transformer_behavior.htm Jack K8ZOA www.cliftonlaboratories.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 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] Ameritron Pulser
Does anyone on the list have any experience using an Ameritron pulser (ATP 100 or ATP 102) to tune an amplifier. If so, I have a few questions: Is there a practical way to connect both the pulser and a regular keyer to the K2 key jack so that you can use either device, but avoid having one device affect the other? Can you get the same effect as the ATP by simply sending a string of dots from the keyer? If so, is there a particular combination of dot spacing and code speed that is best suited to get a K2 to generate the waveform necessary to tune an amplifier by the pulser method? Are these pulsers just a gimmick, or is this really a good way to tune an amplifier? Thanks 73, Steve AA4AK ___ 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 configuration question
I had the same thought when ordering my K3, but I chose the FM filter instead of the AM filter. That will give me sufficient bandwidth for good quality AM RX as well as FM TX/RX. It's more likely that I'll use FM TX on 10m or 6m than AM anywhere. 73 -- Joe KB8AP On Sep 20, 2008, at 2:38 AM, Brett Howard wrote: You need it if you want to listen to an AM stations full bandwidth. You'll not hear the entire transmitted signal without it. You'll be able to hear talk stations or something like that just fine but for listening to music you'd probably find it lacking. Hopefully this helps you in making your decision. On Sat, 2008-09-20 at 08:36 +0200, Michael van Hauten wrote: Hello elecrafters, i ordered a K3 with the additional KBPF3 module for general Coverage. Do i need the additional AM Filter for listening to AM radiostations? or ist this AM Filter only neccessary for AM TX? Thanks for your configuration support. Michael, DC0ZO K2# 5619 ___ 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 QRP DXCC]
Gary, On 160, 80, and 40, I have a vertical (full 1/4 wave on 80 meters) with 120 radials (putting more out this winter).; I also have a Beverage and and a steerable loop for receive. On 60, I use a folded dipole up 23 meters (It also does local duty on the other low bands) On 30, 20, 17, 15, 12, and 10, I use a 14 element Log Periodic up 24 meters. 73 de Dave, W5SV Gary D Krause wrote: Hi David, I'm just curious as to what type of antenna or antenna system you are using? Thanks, Gary, N7HTS ___ 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] Ameritron Pulser
Stephen W. Kercel wrote: Does anyone on the list have any experience using an Ameritron pulser (ATP 100 or ATP 102) to tune an amplifier. No, but... Is there a practical way to connect both the pulser and a regular keyer to the K2 key jack so that you can use either device, but avoid having one device affect the other? Probably you could simply parallel the output of the pulser device with a straight key. If you are using a paddle and the K2's internal keyer, then you could use the K2's 'autodetect' feature (look this up in the manual). Can you get the same effect as the ATP by simply sending a string of dots from the keyer? Probably the pulser would generate relatively shorter pulses than the 50% duty cycle of keyer dits. But you could probably get away with using a keyer. See below. If so, is there a particular combination of dot spacing and code speed that is best suited to get a K2 to generate the waveform necessary to tune an amplifier by the pulser method? Are these pulsers just a gimmick, or is this really a good way to tune an amplifier? The idea is this: to tune an amplifier properly for SSB, you need to tune it so it will be loaded properly under peak power conditions. One way to do this would be tune it in CW mode, increasing drive to produce a CW signal equal to the SSB peak power level. But continuous operation at this level would exceed the tube's dissipation ratings; so by sending a series of short pulses, you can adjust the amplifier at peak plate current without excessive heating due to the low duty cycle. When tuning for CW, it isn't necessary since you are only loading the amplifier to its rated CW plate current, which is lower than the peak SSB current. Of course, many amplifiers are not rated for 100% key-down output for any length of time, so tuning should be kept short. Or you can use a keyer or pulser to reduce the dissipation further. When using a keyer, speed doesn't matter since duty cycle is determined by dot/space ratio. But if you can reduce the weight, that would reduce the duty cycle. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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 vs. Rohde and Schwartz
Interesting to note that in QST magazine's review of a super whizbang, thermonuclear commercial transceiver from Rohde and Schwartz in the October issue of QST, the receiver they referenced its intermod performance to is...the K3. NICE! John, N6AX K3 567 ___ 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] Pulsar
Stephen, In regard to a tuning pulsar. Try this as it works great. www.3898pecker com Tell him you need one for a Kenwood. You need a peak reading watt meter also. 73's Van N5HTY ___ 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 USB TO SERIAL CABLE
Good news Phil, but I have a little warning for others that you don't always get an error message of some sort from Vista if the USB adapter drivers don't work. I have a Radio Shack USB/232 adapter that works FB on my Xp machine. Recently I used a Vista machine temporarily and hooked the adapter to it. The system did its thing finding and installing the drivers, then reported that the adapter was working normally. No BSD, no error message at all. Quite the contrary, it reported the device was working FB. But it wasn't. Since I knew it was a good device, I knew it was Vista and not the adapter. The adapter still works FB on my Xp machine. In Radio Shack's defense, I went back and looked at the specs for the adapter I have. It lists the OS's it works with and Vista was not on the list. They do sell one that they say works with Vista. It was available on-line only. I didn't need it so I haven't tried it. Ron AC7AC -Original Message- I am using vista 64 on my laptop computer. Can anyone suggest where I might get a usb-serial cable with drivers for vista 64. Any Ideas welcome. 73 Norm VK4FNWG I bought the Elecraft USB adapter, and had to download the latest drivers when using it on my XP computer. When I upgraded to my current VISTA computer, VISTA automatically went out and found the latest drivers for me. I didn't have to do anything. Phil - AD5X ___ 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] Pulser
And, of course all this will be done into a dummy load and -not- on air- . (;-) 73! Ken Kopp - K0PP [EMAIL PROTECTED] ___ 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 vs. Rohde and Schwartz
Interesting indeed. The comparison they quote is the IMD dynamic range at 5 KHz spacing, which the RS wins. But take a look at the 2 KHz spacing - the K3 trounces the RS. 73, john WA1ABI K3 #795 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of John Klewer Sent: Saturday, September 20, 2008 11:43 AM To: 'Elecraft' Subject: [Elecraft] K3 vs. Rohde and Schwartz Interesting to note that in QST magazine's review of a super whizbang, thermonuclear commercial transceiver from Rohde and Schwartz in the October issue of QST, the receiver they referenced its intermod performance to is...the K3. NICE! John, N6AX K3 567 ___ 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 vs. Rohde and Schwartz
N6AX: Interesting to note that in QST magazine's review of a super whizbang, thermonuclear commercial transceiver from Rohde and Schwartz in the October issue of QST, the receiver they referenced its intermod performance to is...the K3. Check out the reciprocal mixing noise (phase noise): Model 20/5/2 kHz offset Price RS XK2100L - -99/-75/-63 dBc $20k (wild guess) Icom 7700- -109/-91/-78$6000 Elecraft K3 - -116/-106/-95 $2500 Moral: you don't always get what you pay for. 73, Bill W4ZV ___ 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] Ameritron Pulser
Thank to various responders. 73, Steve AA4AK ___ 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 output power unstable
I am right now in the middle of the SAC contest when I notice that the K3 has a problems keeping output power stable. I noticed some excessive high output from the amp when investigating I found that my K3 set to drive the amp with between 20-30 watt output depending on band, delivers substancially more. Ouptut power pulsate between nothing and full power, delivering more than 100 watts in bursts into the amp (designed for 30W input). The problem is easiest to reproduce on 80 meters, but I am sure I saw the power wobble a few seconds b4 stabilizing on higher bands to. Even when the radio has cooled down to a PA temp of 34C the problem is there. I think I read somthing about a similar prioblem somewhere, would apreciate any leads that I might help to narrow down and eliminate the problem. 73 de Björn /SM0MDG (SE0X in SAC) ___ 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] Toroids frequency range and baluns
Ron wrote: So-called baluns that transform impedances are, typically, transformers -- often transmission-line transformers. There is a type of choke balun that is both a balanced-to-unbalanced device and an impedance transformer at once. Connecting two ferrite-loaded transmission line baluns in parallel at one end and series at the other will yield a 4:1 transformation. Higher ratios are possible with more series/parallel combinations. Wes N7WS ___ 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 configuration question
I had the same thought when ordering my K3, but I chose the FM filter instead of the AM filter. That will give me sufficient bandwidth for good quality AM RX as well as FM TX/RX. Absolutely. It is a shame that the K3 firmware currently blocks ESSB or AM transmit when the FM filter is installed in place of the AM filter. Fortunately, if you're not using FM transmit, it is possible to lie to the firmware and tell it FL1 is 6 KHz. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Planisky Sent: Saturday, September 20, 2008 11:09 AM To: Elecraft Reflector Subject: Re: [Elecraft] K3 configuration question I had the same thought when ordering my K3, but I chose the FM filter instead of the AM filter. That will give me sufficient bandwidth for good quality AM RX as well as FM TX/RX. It's more likely that I'll use FM TX on 10m or 6m than AM anywhere. 73 -- Joe KB8AP On Sep 20, 2008, at 2:38 AM, Brett Howard wrote: You need it if you want to listen to an AM stations full bandwidth. You'll not hear the entire transmitted signal without it. You'll be able to hear talk stations or something like that just fine but for listening to music you'd probably find it lacking. Hopefully this helps you in making your decision. On Sat, 2008-09-20 at 08:36 +0200, Michael van Hauten wrote: Hello elecrafters, i ordered a K3 with the additional KBPF3 module for general Coverage. Do i need the additional AM Filter for listening to AM radiostations? or ist this AM Filter only neccessary for AM TX? Thanks for your configuration support. Michael, DC0ZO K2# 5619 ___ 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 output power unstable
Bjorn wrote: I am right now in the middle of the SAC contest when I notice that the K3 has a problems keeping output power stable. I noticed some excessive high output from the amp when investigating I found that my K3 set to drive the amp with between 20-30 watt output depending on band, delivers substancially more. Ouptut power pulsate between nothing and full power, delivering more than 100 watts in bursts into the amp (designed for 30W input). The problem is easiest to reproduce on 80 meters, but I am sure I saw the power wobble a few seconds b4 stabilizing on higher bands to. Even when the radio has cooled down to a PA temp of 34C the problem is there. I think I read somthing about a similar prioblem somewhere, would apreciate any leads that I might help to narrow down and eliminate the problem. 73 de Björn /SM0MDG (SE0X in SAC) ___ 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 Bjorn, I posted about this very problem a couple of months ago but had virtually no feedback so it's interesting to hear of someone else being affected. As you say the power would drop quite suddenly then come back up; when running an amp it once went right up to ~100w even though set for about 35w - it tripped the amp Seems to do this on phone too but cw is easiest to see when it's happening. To be honest it has hardly happened to me at all recently and I wonder if you have the latest firmware installed. I did contact Elecraft support and I seem to remember they said it was an AlC control software problem and to keep downloading the latest firmware which would eventually sort it, and as I say it seems much better now here. However the other day I was on phone and the power was all over the place; it then started giving me TXG Error messages and I had to do the 5 and 50 watt power output config from start to finish which seemed to fix it. Good luck in the contest - family duties here else I would be giving away some points for you 73, Stewart Rolfe, GW0ETF (K3 145) -- View this message in context: http://n2.nabble.com/K3-output-power-unstable-tp1106588p1106667.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 configuration question
I had the same thought when ordering my K3, but I chose the FM filter instead of the AM filter. That will give me sufficient bandwidth for good quality AM RX as well as FM TX/RX. Absolutely. It is a shame that the K3 firmware currently blocks ESSB or AM transmit when the FM filter is installed in place of the AM filter. Fortunately, if you're not using FM transmit, it is possible to lie to the firmware and tell it FL1 is 6 KHz. While you can do this, I suggest you not do so. Here's why. The K3 uses a DSP IF at 15 kHz. The roofing filter is the primary means of suppressing the 15 kHz image on transmit and receive. In wideband modes (ESSB, AM and FM), this is especially true. The wider bandwidth of the 13 kHz FM filter results in poorer suppression of the image. In the FM sub-bands, it is suppressed well within the definition of good engineering practice. Further, FM is not considered to be a weak-signal mode. SSB is often a weak signal mode, and ESSB and AM operations are typically within the image offset of potential weak signal operations. Thus, if you transmit in other than an FM sub-band using the FM filter, you risk interfering with nearby weak signal operation. We are studying the use of the FM filter for such purposes, but we have not yet completed our characterization of the use of the FM filter for non-FM use. When we do, and if the image suppression is sufficient to allow you to be a good neighbor when running your K3 to drive a legal limit amplifier such that the transmit image is in a nearby weak-signal area, we'll directly support its use in the K3 firmware. Until then, please consider the potential interference you may cause if you use the FM filter in this manner. 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
[Elecraft] kx1 - toriod - testing deferred...
Woke up this morning, all ready to test my theory... It's raining... Darn!! ___ 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] Reminder - UK Elecraft net Sundays 0900 local, 3630 KHz
I shall be QRV on the Elecraft UK net on Sunday 21st September at 0900. There are at least 3 contests in operation this weekend, fingers crossed we can keep the frequency clear. Several stations have other commitments, but hopefully there will be someone to talk to. I have my Perseus SDR linked to my K3, so I can bore anyone who asks with details of how it works! 73 Dave, G4AON K3/100 #80, Acom 1000 linear ___ 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] Reminder - UK Elecraft net Sundays 0900 local, 3630 KHz
Sorry, can't make it tomorrow, putting a Tenamast up so we have a permanent antenna at GB4SBS -- Times are bad. Children no longer obey their parents, and everyone is writing a book. -Marcus Tullius Cicero, statesman, orator and writer (106-43 BC) On 20 Sep 2008, at 20:39, Dave G4AON wrote: I shall be QRV on the Elecraft UK net on Sunday 21st September at 0900. There are at least 3 contests in operation this weekend, fingers crossed we can keep the frequency clear. Several stations have other commitments, but hopefully there will be someone to talk to. I have my Perseus SDR linked to my K3, so I can bore anyone who asks with details of how it works! ___ 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 configuration question
The K3 uses a DSP IF at 15 kHz. The roofing filter is the primary means of suppressing the 15 kHz image on transmit and receive. In wideband modes (ESSB, AM and FM), this is especially true. Let's see ... with a 15 KHz DSP IF, the image would be 30 KHz minus the modulating frequency (for AM) from the center of the transmit (roofing) filter. Based on the specifications of Inrad's 8 and 9 MHz AM filters (8 pole) and their 7 MHz (6 pole) front end filters (15 and 20 KHz wide at -1 dB), the FM filter's shape factor should be in the 1.6 to 1.8 range and the -60 dB bandwidth between 20 and 25 KHz. Unless the filter or circuit layout has a major problem, the response should down at least 90 dB at +/- 15 KHz. With AM (worst case), assuming the carrier is centered in the filter and a highest modulating frequency of 4 KHz (K3 limit for ESSB), the image sideband is 26 KHz from the center of the (transmit) IF filter - well into the filter stopband. With an ultimate rejection of only 90 dB 25 KHz away from the center of the filter, the transmitted image from a 1500 Watt (peak) amplifier will be 1.5 microwatts peak for an ESSB signal, 0.75 microwatts for the carrier of an AM signal or 0.375 microwatts for the sideband of an AM signal. 90 dB of image rejection is more than 30 dB better than the 5th order IMD from most amateur 1500 watt amplifiers and 40 dB better than the K3's own 9th order IMD performance (ARRL measurements). 73, ... Joe, W4TV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyle Johnson Sent: Saturday, September 20, 2008 2:15 PM To: 'Elecraft Reflector' Subject: Re: [Elecraft] K3 configuration question I had the same thought when ordering my K3, but I chose the FM filter instead of the AM filter. That will give me sufficient bandwidth for good quality AM RX as well as FM TX/RX. Absolutely. It is a shame that the K3 firmware currently blocks ESSB or AM transmit when the FM filter is installed in place of the AM filter. Fortunately, if you're not using FM transmit, it is possible to lie to the firmware and tell it FL1 is 6 KHz. While you can do this, I suggest you not do so. Here's why. The K3 uses a DSP IF at 15 kHz. The roofing filter is the primary means of suppressing the 15 kHz image on transmit and receive. In wideband modes (ESSB, AM and FM), this is especially true. The wider bandwidth of the 13 kHz FM filter results in poorer suppression of the image. In the FM sub-bands, it is suppressed well within the definition of good engineering practice. Further, FM is not considered to be a weak-signal mode. SSB is often a weak signal mode, and ESSB and AM operations are typically within the image offset of potential weak signal operations. Thus, if you transmit in other than an FM sub-band using the FM filter, you risk interfering with nearby weak signal operation. We are studying the use of the FM filter for such purposes, but we have not yet completed our characterization of the use of the FM filter for non-FM use. When we do, and if the image suppression is sufficient to allow you to be a good neighbor when running your K3 to drive a legal limit amplifier such that the transmit image is in a nearby weak-signal area, we'll directly support its use in the K3 firmware. Until then, please consider the potential interference you may cause if you use the FM filter in this manner. 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 ___ 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 related - non-linear audio transformer behavior
Paul: I've revised my non-linear transformer page in two respects: 1. Added the plot you requested. (Almost at the bottom of the page) 2. Added square wave ringing data for four transformers, although I am not at all convinced that square wave ringing is an appropriate figure of merit for a transformer used in a narrowly bandwidth limited communications receiver. The page is: http://www.cliftonlaboratories.com/non-linear_transformer_behavior.htm Paul Christensen wrote: Jack: With regard to the plots under Comparisons and Conclusions, and also under Frequency Response Compared, is it possible to change the source Z from 600-ohms to 50-ohms and re-test? It would be an interesting exercise to see if THD (at ~ 1V RMS) and the high-end frequency response of the Bourns transformer changes significantly. Tnx! Paul, W9AC - Original Message - From: Jack Smith [EMAIL PROTECTED] To: 'Elecraft' elecraft@mailman.qth.net Sent: Saturday, September 20, 2008 8:02 AM Subject: [Elecraft] K3 related - non-linear audio transformer behavior I've spent the last two weeks measuring and analyzing non-linear behavior of several audio transformers, focusing on the Tamura TTC-108 used as isolation transformers in the K3. My data and analysis is now available at http://www.cliftonlaboratories.com/non-linear_transformer_behavior.htm Jack K8ZOA www.cliftonlaboratories.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 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] Intefrace K3 and transverter
I am looking for a description for a cable. I have a K3 with the KXV3 and 2 Elecraft transverters (XV432 and XV144). I have the needed hardware connectors. I am really struggling with the connections. Does anyone have a list of what pins on the K3 go to what pins on the XVxxx? 73 Alan W1HYV _ Want to do more with Windows Live? Learn “10 hidden secrets” from Jamie. http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008___ 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] Interface K3 and transverter
Alan, I recently had the same problem. The following worked for me: ACC Pin 2 - Auxbus: connect to green wire - Pin 6 on DB-9 ACC Pin 7 - K3 on signal: connect to red wire - Pin 8 on DB-9 ACC Pin 10 - Keyout: connect to black wire - Pin 9 on DB-9 ACC Pin 5 or 12 - Gnd: connect to bare wire - Pin 1 on DB-9 Also, you should put a pull up resistor between pin 10 and pin 7 on the ACC connector as pin 10 is an open collector output on Q7 (MMBT3904), according to the KIO3 schematic. Finally, make sure TX INH is is set to OFF. Mike, KS7D -- From: Alan Price [EMAIL PROTECTED] Sent: Saturday, September 20, 2008 7:22 PM To: Elecraft elecraft@mailman.qth.net Subject: [Elecraft] Intefrace K3 and transverter I am looking for a description for a cable. I have a K3 with the KXV3 and 2 Elecraft transverters (XV432 and XV144). I have the needed hardware connectors. I am really struggling with the connections. Does anyone have a list of what pins on the K3 go to what pins on the XVxxx? 73 Alan W1HYV _ Want to do more with Windows Live? Learn “10 hidden secrets” from Jamie. http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008___ 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] Ferrite transformer losses, 43-foot vertical and the K3
When a high VSWR exists with a toroid ferrite balun due to a high inductive or capacitive reactance and the toroid begins to heat, the losses will rise to quite unacceptable losses and can possibly destroy the balun itself, even tough the tuner used appears to have reduced the VSWR on the input side of the circuit to a very low value. Generally a 4:1 or 1:1 transformer type balun should be preferably used for just a resistance transformation, not where there is a highly reactive component on the output side of the balun. Lots of people get away with this situation, but it isn't a very good idea. I commonly did this for years with very large ferrite cores and a vanilla high pass T network tuner (like the many MFJ and other T network tuners) For the last 15 years I have used nothing but the common Parallel type balanced line link coupled tuner configuration and had extremely good results with the old fashioned and sometimes very cranky to get setup right circuit. choke type baluns (the ones that traditionally use a large number of ferrite beads on a length of coaxial cable) are much less troublesome than the transformer type. If your balun setup runs cool, then you probably have hit upon a length of feeder that is just right and you are OK. If it is running warm then you are treading on dangerous ground and things may be getting ready to surprise you one day with a catastrophic failure, especially when you run the legal limit! This no matter what the VSWR meter says between the tuner and the ferrite balun in question. 73, Sandy W5TVW - Original Message - From: n4lq [EMAIL PROTECTED] To: Phil Debbie Salas [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Friday, September 19, 2008 8:54 PM Subject: Re: [Elecraft] Ferrite transformer losses, 43-foot vertical and the K3 Phil. Questions: 1. Why would one use a balun when both the antenna and coax are unbalanced? Wouldn't a unun be appropriate? 2. What are the swrs at the balun? The swr at the K3 doesn't tell us much since the length of the coax affects it greatly. Steve Ellington N4LQ [EMAIL PROTECTED] - Original Message - From: Phil Debbie Salas [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, September 19, 2008 4:21 PM Subject: [Elecraft] Ferrite transformer losses, 43-foot vertical and the K3 Because of some earlier discussions here, I wanted to actually measure losses in a 4:1 ferrite transformer. I wanted this info as I have a home-brew 43-foot vertical and these transformers are what seem to be recommended for matching to this antenna. I used a FT240-61 ferrite toroid which has a permeability of 125. I chose 16-gauge speaker wire to experiment with. This is because I want to eventually use high voltage wire, and 16-gauge is the largest gauge 2-conductor high-voltage wire I could find (McMaster-Carr 9634T701 @ $2.65/foot). I built a 4:1 unun, as I am feeding an unbalanced vertical antenna. And I decided to go with a voltage balun as this is a simpler structure than a current balun or unun. With a little experimentation, I was able to build a very good 1.8-30 MHz 4:1 unun. This consists of 12-turns of the 16-gauge speaker wire on the FT-240-61. As the voltage balun is a little inductive causing degradation at the higher frequencies, I tuned this out with a 33pf capacitor across the 50 ohm input. This gave me a transformer with 1.2:1 SWR at 1.8 MHz, but less than 1.1:1 from 3.5-30 MHz. In order to measure loss, I built a second identical transformer and connected these back-to-back. I measured insertion loss with both an Array Solutions PowerMaster, and a Tektronix TDS-2200 digital oscilloscope. I made all measurements with 20 watts of RF power on my workbench. Bottom line: Loss through both transformers was less than ½-watt (20 watts forward power) from 1.8-30 MHz. This is just a little over 1% of loss in each transformer. Even if my measurements are off by a factor of two, this is still pretty much insignificant loss. Next I installed one of these transformers at the base of my 43-foot vertical. My radial system isn't the best in the world because of the space I'm restricted to. I have about a dozen random-length radials with lengths up to about 50-feet. My transmission line is 60-feet of Andrew ½-inch Heliax that transitions to a 3-foot section of LMR-400 inside my house going to the K3. My Array Solutions PowerMaster is located immediately at the output of the K3. The SWR measured with the PowerMaster was as follows: 160: 4.9:1 80: 6.3:1 60: 3.3:1 40: 3.2:1 30: 3.2:1 20: 3:1 17: 2.1:1 15: 1.9:1 12: 1.4:1 10: 2.2:1 Obviously, these mismatches are easily handled by the internal K3 auto-tuner. And line loss is minimal because the mismatch isn't very high, and the transmission line is very low loss. The 16-gauge speaker wire on the FT240-61 core seems to be working fine even with 600 watts out of my ALS-600 amplifier. However, I do have
Re: [Elecraft] K2 QRP DXCC
Hello Dave, Congratulations on the DXCC (K2). I just got 1644 on the air after 8 years of it sitting in the box. I am enjoying every minute of it. Today I ran the spectrogram program to set up the filters and WOW what a difference that made. So far I've worked 13 countries with it over the last couple of weeks. I've been working on the mods to bring it up to date. After I got the filters set I've been playing around in the SAC contest and worked several Scandinavian countries. Not bad for 5 watts and a windom. Its nice to get rid of all the QRM around a station. The other day I was able to dig ZK3MW out of the mud on 30 meters. I didn't get to work him but it was neat to see what the rig could do. I wish I had the filters set right for that. Anyway, again, great job, and especially with all those SSB QSOs. 73, Larry, NU4B David F. Reed wrote: Well, I am sure I am not the first one, nor the only one, but today I worked the last station I needed to achieve DXCC QRP with my K2 serial number 4960 (almost 50% on SSB). I have been using it on and off since summer of 2006 when WA2DKG built it for me (thanks Jerry!) providing me many hours of pleasure. Most QSOs have been confirmed via eQSL, some by LotW. No award until they are all in, but pretty good for this chunk of the solar cycle, and further proof (as if any were needed) of the Elecraft mojo. What next? Maybe DXCC with my KX-1, or my K1, or K3? I cam close to WAS with the KX-1, so that might be the next project. Speak up out there; surely there are good stories of other awards and the same ones, from the rest of you and I would enjoy hearing about them. 73 de Dave, W5SV ___ 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-QRP-DXCC-tp1102448p1107165.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] Ferrite transformer losses, 43-foot vertical and the K3
Sandy, You are correct that using a balun (either 4:1 or 1:1) is not necessarily the most efficient solution. The 'old fashioned' link coupled tuner will most always be more efficient. When the feedline input impedance (and that has nothing to do with the characteristic impedance of the feedline) is close to the output impedance of the balun, the balun will be just almost as efficient as the link coupled balanced tuner, but that rarely happens in practice. Yes, using a balun following an unbalanced transmatch is a compromise. It lends itself to easy bandswitching and its associated convenience. If one is searching for the most efficient antenna tuning mechanism, then either dedicated resonant antennas are required, or one must accept the inconveniences of changing coils in a simple balanced link coupled tuner or accept the compromises of an easy bandswitching system. The old Johnson Matchbox was an effort to provide bandswitching convenience with a link coupled balanced tuner, but even it has limited matching range compared to the simple single-band tuner designs. Bottom line, one must either accept the compromises dictated by the conveniences of bandswitching or accept the inconveniences of using the most efficient tuners that can be constructed. There is no 'best of all worlds'. 73, Don W3FPR Sandy wrote: When a high VSWR exists with a toroid ferrite balun due to a high inductive or capacitive reactance and the toroid begins to heat, the losses will rise to quite unacceptable losses and can possibly destroy the balun itself, even tough the tuner used appears to have reduced the VSWR on the input side of the circuit to a very low value. Generally a 4:1 or 1:1 transformer type balun should be preferably used for just a resistance transformation, not where there is a highly reactive component on the output side of the balun. Lots of people get away with this situation, but it isn't a very good idea. I commonly did this for years with very large ferrite cores and a vanilla high pass T network tuner (like the many MFJ and other T network tuners) For the last 15 years I have used nothing but the common Parallel type balanced line link coupled tuner configuration and had extremely good results with the old fashioned and sometimes very cranky to get setup right circuit. choke type baluns (the ones that traditionally use a large number of ferrite beads on a length of coaxial cable) are much less troublesome than the transformer type. If your balun setup runs cool, then you probably have hit upon a length of feeder that is just right and you are OK. If it is running warm then you are treading on dangerous ground and things may be getting ready to surprise you one day with a catastrophic failure, especially when you run the legal limit! This no matter what the VSWR meter says between the tuner and the ferrite balun in question. 73, ___ 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] Elecraft CW Net Announcement
Good Evening, Our solar stream has ceased but conditions were very nice for a few days afterward. I have not been on the air since Wednesday so I don't know that it continues. No, I did check in to the MARS net on Friday and conditions were much better than they have been lately. I seem to forget about those rare occasions when I am forced to use a microphone. MARS has been talking about CW nets but so few folks know the code any longer they have not gotten under way. I broached the subject at Field Day but discussion was quite brief. Weather has turned again; back to wet and cool. Sam is happily ensconced in his box next to the woodstove enjoying the heat. I better get some wood in before I go to bed so it will be very dry by tomorrow. Autumn is only a day away so I had better get covers over all my wood piles to keep them dry. Right now they are seasoning in the last of the sun. As the year progresses more and more of the sun's path is obscured by the mountain to my south. Around the solstice it is gone entirely for about a six weeks. Then it appears at dawn and near dusk for ever lengthening intervals. Almost forgot: if conditions are good enough tomorrow I will reinstate the call by zone system. This helps keep the uproar down to where I can hear individual stations better. Last week there was quite a bit of QRM so I could only work the tail end stations until the crowd thinned considerably. If necessary I will call East first, then the middle of the country, and finally the west. It may be easier to call by time zones. That way the folks in the east can secure early while people out west can check in later since it will still be daylight here. So Eastern Daylight, Central and Mountain Daylight, and then finally all of the stations in the far west: Hawaii, Alaska, Washington, Oregon, and that state south of us :) If Tom is available he can call for the folks in New Zealand, Australia, and elsewhere. Maybe even Iceland and Ireland! Please join us tomorrow evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) 3) Call by time zone (East, Central Mountain, everybody else) Sunday 2300z (Sunday 4 PM PDT) 14050 kHz Monday 0200z (Sunday 7 PM PDT) 7045 kHz Stay well, Kevin. KD5ONS ecn.visionseer.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] elecraft MH2 mic
Hi Norm. It took me a while to find this as well. Page 51, Owner's Manual: Main Menu: MIC SEL: tap the number 2 on the keypad to toggle Bias. Ann VA3NOE Norm Greenaway wrote: Recently received my K3/100 s/n 1650. But need help activating MH2 mic. Have followed all the manual procedures but still unable to turn bias on in mike. any suggestions 73 VK4FNWG ___ 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 AGC is better now
My K3 is back from factory and the AGC now works better at handling pile ups where many callers formerly were reduced to the same audio level. Now, it is easier to pick out calls among many callers. Not absolutely great, but better. Can anyone recommend the best menu setting for max discrimination among many callers at same time? Charly K4VUD___ 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: [!! SPAM] Re: [Elecraft] K3 - s/n 1591 - TCXO module question
Thank you, Luc. I trimmed the leads and the radio is working fine so far. You've had the same results without trimming the leads, so it would appear that it isn't critical. 73 Ann VA3NOE Luc Favre wrote: Hello, I had the same problem and solved it without trimming the leads. The module dont't rest against the socket but sits above it. No trouble till now... just a week ! Is there a builder alert on this subject ? 73 Luc/F6HJO - Original Message - From: Ann and/or Bill Tekatch [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Wednesday, September 17, 2008 3:53 AM Subject: [Elecraft] K3 - s/n 1591 - TCXO module question Hello everyone. Things are going really well with the build of s/n 1591 (I had the power on tonight for the initial power-up test - so exciting!!!) but tonight when I went to put the TCXO module on the KREF board, I discovered that the leads on the module are too long to allow its bottom to rest against the socket as described on p.46 of the assembly manual. Is this a problem? Do I need to trim the leads? FYI the leads are 1/4 long and a gap of 1/16 is left between the bottom of the TCXO module and its socket when it is fully engaged. BTW for those of you keeping track of delivery times: K3 kit ordered May 9 Katiegram August 27 Delivery on Sept. 5 I really appreciated receiving this info. when I was awaiting my K3 - my thanks to everyone who shared this info. on the reflector! Thanks for looking 73 Ann T. ___ 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 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 related - non-linear audio transformer behavior
Jack, Thanks for the research - very interesting and it looks like a simple fix to improve the performance of the K3 significantly. You've got me wondering now though about DATA-A modes. As the K3 uses the same transformer for line in your work suggests that the transmit performance will be affected by the sound card output impedance - worth considering at least. Cheers, Paul M1PAF -- View this message in context: http://n2.nabble.com/K3-related---non-linear-audio-transformer-behavior-tp1106188p1107335.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
