VLF/LF Converters
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Those interested in listening to signals below 500 KHz with their K2 or
K3 may find my new review of Jackson Harbor Press's inexpensive VLF/LF up converter of interest. It's at http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm I've been using it with my K2 and an active antenna I'm working on and can hear WWVB quite well here in Northern Virginia, along with a number of other stations. Jack K8ZOA _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Ron
17.2 KHz is well within the working range of the Jackson Harbor Press kit. The main issues are a good receiving antenna and local noise. I can hear German and French LF stations (200 b/s encrypted GMSK) in the 20 KHz range a few dB above the noise most of the time with my experimental active antenna, SAQ may be detectable with narrow band techniques such as the ARGO QRSS program. Back in the day, I used to listen to the long wave CW from the public coast stations and ships up and down the East Coast--quite a collection of signal quality could be found, not to mention operator fists. Jack K8ZOA Ron D'Eau Claire wrote: > Nice write-up Jack! > > One of the things CW buffs can do with such a converter is catch the Marine > CW stations that are still active. Station KPH on the California Coast is > very active, and the last I saw there are several others around North > America warming the 600 meter (400-500 kHz) airwaves regularly now. Very few > ships are still using CW, but a number of licenses for coastal stations have > been maintained, and even a few new ones issued to individuals unwilling to > let 600 meter CW die. > > When active, one will hear the "CQ Wheel" calling for anyone with traffic, > traffic lists being send, press (news) sent, etc. > > More information about KPH with ties to other stations available is located > at > http://www.radiomarine.org/kph-proj.html > > Just don't try to hear them between 15 and 18 minutes past the hour or > between 45 and 48 minutes past the hour. They still observe the traditional > two 3-minute "silent periods" when all stations stop routine activities and > listen for distress calls on 500 kHz. > > And for some real "DX" fun, check out the occasional transmissions from SAQ > at Grimeton (Sweden) on 17.2 kHz! That would require some modification of > the input filter, I suspect. SAQ runs a Alexander Alternator: a big > specially-designed rotary alternating current generator hooked to an > antenna. See: > > http://www.alexander.n.se/startsida_e.htm > > Ron AC7AC > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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: [hidden email] 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: VLF/LF Converters
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In reply to this post by Jack Smith-6
Jack,
Although I do not have any details to hand there is some Amateur CW activity in Europe within a few kHz of 500 kHz, and I believe that crossband to HF contacts are made also. 73, Geoff GM4ESD Jack Smith wrote: > Those interested in listening to signals below 500 KHz with their K2 or K3 > may find my new review of Jackson Harbor Press's inexpensive VLF/LF up > converter of interest. It's at > http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm > > I've been using it with my K2 and an active antenna I'm working on and can > hear WWVB quite well here in Northern Virginia, along with a number of > other stations. > > Jack K8ZOA _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Geoff:
There are a dozen or so experimental stations in the 500 KHz range operated by a group of hams. http://www.500kc.com/ has more detail. It seems that not too many are actually radiating as of this time however. There are also quite a few "lowfer" Part 15 (unlicensed, but permitted) beacons in the 186 KHz range. The Longwave Club of America is a good starting point for these Part 15 operations. http://www.lwca.org/ No 136 KHz amateur operations here in the US, unfortunately. Jack K8ZOA Geoffrey Mackenzie-Kennedy wrote: > Jack, > > Although I do not have any details to hand there is some Amateur CW > activity in Europe within a few kHz of 500 kHz, and I believe that > crossband to HF contacts are made also. > > 73, > Geoff > GM4ESD > > > Jack Smith wrote: > > >> Those interested in listening to signals below 500 KHz with their K2 >> or K3 may find my new review of Jackson Harbor Press's inexpensive >> VLF/LF up converter of interest. It's at >> http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm >> >> >> I've been using it with my K2 and an active antenna I'm working on >> and can hear WWVB quite well here in Northern Virginia, along with a >> number of other stations. >> >> Jack K8ZOA > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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: [hidden email] 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 |
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In reply to this post by Jack Smith-6
A pal of mine used a MSF clock rx to a panadaptor which worked remarkably well. Could get the details for anyone interested.
David G3UNA > > From: "Geoffrey Mackenzie-Kennedy" <[hidden email]> > Date: 2008/08/28 Thu PM 01:10:53 BST > To: "Jack Smith" <[hidden email]> > CC: Elecraft Discussion List <[hidden email]> > Subject: Re: [Elecraft] VLF/LF Converters > > Jack, > > Although I do not have any details to hand there is some Amateur CW activity > in Europe within a few kHz of 500 kHz, and I believe that crossband to HF > contacts are made also. > > 73, > Geoff > GM4ESD > > > Jack Smith wrote: > > > > Those interested in listening to signals below 500 KHz with their K2 or K3 > > may find my new review of Jackson Harbor Press's inexpensive VLF/LF up > > converter of interest. It's at > > http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm > > > > I've been using it with my K2 and an active antenna I'm working on and can > > hear WWVB quite well here in Northern Virginia, along with a number of > > other stations. > > > > Jack K8ZOA > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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 > ----------------------------------------- Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Jack Smith-6
Jack Smith wrote:
> Those > interested in listening to signals below 500 KHz with their K2 or K3 may > find my new review of Jackson Harbor Press's inexpensive VLF/LF up > converter of interest. It's at > http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm > > I've been using it with my K2 and an active antenna I'm working on and > can hear WWVB quite well here in Northern Virginia, along with a number > of other stations. I'm on the west coast [near Sacramento] and about 120 miles from the XRAY-9940 LORAN-C station at Middletown CA, and about 190 miles from the Master-9940 at Fallon NV. Both run 400KW peak [I think]. That's about all I can hear anywhere from below 100 KHz to 400 KHz or so with my Palomar VLF converter, the signals are huge. Maybe I need a different VLF box. 73, Fred K6DGW - Northern California Contest Club - CU in the 2008 Cal QSO Party 4-5 Oct 08 - www.cqp.org _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Jack Smith-6
I am one of those 600m stations, WD2XSH/16. Currently building my K2 and after that, a new 7mc IF transverter to get the K2 down on 600 meters. I currently run a 3mc IF transverter and my TS-930. CW coverage for my station is pretty much the whole lower 48 states & into Canada. I have been on the air for a year or so now. The band is 505-510kc but most hang out in the 505-508kc area to avoid the NDB's on 510kc.
Mike WE0H
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In reply to this post by Jack Smith-6
I'll copy this to the reflector...I don't have that answer Phil. Just
got into the Elecraft rigs at the Orlando Hamcation when I ordered my K2. I am sure someone on the reflector will have an answer. You should hear Pat XSH/6 real well down there on 600m as he is 4 blocks from the Gulf Coast in Mississippi. He normally sits on 506.35kc running CW or 505.266kc running QRSS-3. Mike WE0H Phil LaMarche wrote: > I have general coverage in my K3, what and how would I enter this frequency? > > Phil > > > Philip LaMarche > LaMarche Enterprises, Inc. > www.instantgourmetspices.com > > www.w9dvm.com > 800-395-7795 pin 02 > 727-944-3226 > FAX 727-937-8834 > NASFT 30210 > > K3 #1605 > W9DVM > > > > > From: WE0H > I am one of those 600m stations, WD2XSH/16. Currently building my K2 and > after that, a new 7mc IF transverter to get the K2 down on 600 meters. I > currently run a 3mc IF transverter and my TS-930. CW coverage for my station > is pretty much the whole lower 48 states & into Canada. I have been on the > air for a year or so now. The band is 505-510kc but most hang out in the > 505-508kc area to avoid the NDB's on 510kc. > Mike > WE0H > > > > Jack Smith-6 wrote: > >> Geoff: >> >> There are a dozen or so experimental stations in the 500 KHz range >> operated by a group of hams. http://www.500kc.com/ has more detail. It >> seems that not too many are actually radiating as of this time however. >> >> There are also quite a few "lowfer" Part 15 (unlicensed, but >> permitted) beacons in the 186 KHz range. The Longwave Club of America >> is a good starting point for these Part 15 operations. >> http://www.lwca.org/ >> >> No 136 KHz amateur operations here in the US, unfortunately. >> >> Jack K8ZOA Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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To enter a 600m frequency on the K3, say 506 KHz, use this sequence:
[FREQ ENT] 0506 [ENTER] where [ENTER] is the AFX button. If you are going to listen on 600m it might be helpful to manually tune the ATU for optimum reception: First select KAT3= LCSET in the Config menu; then exit the config menu and press ATU TUNE. You can then adjust CA or CT with the VFO-A knob, and adjust L with the VFO-B knob. Switch between CA/CT with the ANT button. (When you are done with 600m don't forget to switch Config: KAT3 back to AUTO, and retune the ATU on 160m if you use that band.Otherwise the K3 will try to use your manual settings for 160m.) 73, Drew AF2Z On Sun, 01 Mar 2009 10:07:34 -0600, Mike WE0H wrote: >I'll copy this to the reflector...I don't have that answer Phil. Just >got into the Elecraft rigs at the Orlando Hamcation when I ordered my >K2. I am sure someone on the reflector will have an answer. You should >hear Pat XSH/6 real well down there on 600m as he is 4 blocks from the >Gulf Coast in Mississippi. He normally sits on 506.35kc running CW or >505.266kc running QRSS-3. >Mike >WE0H > > >Phil LaMarche wrote: >> I have general coverage in my K3, what and how would I enter this frequency? >> >> Phil >> >> >> Philip LaMarche >> LaMarche Enterprises, Inc. >> www.instantgourmetspices.com >> >> www.w9dvm.com >> 800-395-7795 pin 02 >> 727-944-3226 >> FAX 727-937-8834 >> NASFT 30210 >> >> K3 #1605 >> W9DVM >> >> >> >> >> From: WE0H >> I am one of those 600m stations, WD2XSH/16. Currently building my K2 and >> after that, a new 7mc IF transverter to get the K2 down on 600 meters. I >> currently run a 3mc IF transverter and my TS-930. CW coverage for my station >> is pretty much the whole lower 48 states & into Canada. I have been on the >> air for a year or so now. The band is 505-510kc but most hang out in the >> 505-508kc area to avoid the NDB's on 510kc. >> Mike >> WE0H >> >> >> >> Jack Smith-6 wrote: >> >>> Geoff: >>> >>> There are a dozen or so experimental stations in the 500 KHz range >>> operated by a group of hams. http://www.500kc.com/ has more detail. It >>> seems that not too many are actually radiating as of this time however. >>> >>> There are also quite a few "lowfer" Part 15 (unlicensed, but >>> permitted) beacons in the 186 KHz range. The Longwave Club of America >>> is a good starting point for these Part 15 operations. >>> http://www.lwca.org/ >>> >>> No 136 KHz amateur operations here in the US, unfortunately. >>> >>> Jack K8ZOA >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: VLF/LF Converters
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In reply to this post by Jack Smith-6
I ordered one of these after reading your report. I built it with the
stock filters, though I ordered the extra parts. I hooked it up to my K3, LP-PAN, and Quisk software. Here are some screenshots of NDB's, plus a picture of the case I put it in. http://wa5znu.org/2009/06/lfconv/ Leigh/WA5ZNU > Those interested in listening to signals below 500 KHz with their K2 > or K3 may find my new review of Jackson Harbor Press's inexpensive > VLF/LF up converter of interest. It's at > http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm > > I've been using it with my K2 and an active antenna I'm working on and > can hear WWVB quite well here in Northern Virginia, along with a > number of other stations. > > Jack K8ZOA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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