[Elecraft] March Madness Polar Bear Moonlight Run
Hello, The Polar Bear are going out on March 11, 2006 for our moonlight madness run. Some of the Polar bears are camping out over night. If you would like to hunt the PB's on the air you can find out more information at www.n3epa.org and click on the Polar Bear link. If you are looking for times and frequencies click on March 2006 when in the Polar Bear page. 72 and Thanks, Ron Polityka WB3AAL Polar Bear #1 www.wb3aal.com www.n3epa.org ___ 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] Solder?
Spence: I've been using Kester 285 for several years now and have had extremely satisfying results from it. As good as Multicore. 73, Tom HammondN0SS At 10:11 PM 3/6/2006, Spence Wilhelm wrote: Thanks Stuart, After using the solder from Circuit Specialists for awhile on some test parts, I decided to trash it and just ordered some Kester 285. I'm confident I won't be disappointed. Thank you to all on the list for giving me good advice on this issue. 73, Spence W7CSW Original Message Follows From: Stuart Rohre [EMAIL PROTECTED] To: Spence Wilhelm [EMAIL PROTECTED], elecraft@mailman.qth.net Subject: Re: [Elecraft] Solder? Date: Mon, 6 Mar 2006 20:25:49 -0600 Solder is a very subjective thing. The thing to do with any solder unfamiliar to you is use it on some cables, components, connectors and evaluate the quality of joints it makes with your soldering tools, skill, etc. You can see if it takes more or less heat than old solder you are familiar with. You can see if it makes shiny, well wetted joints. You can see if it has left over flux residue in excess to a other clean solders. Make sure the formulation is suited to the heat range tip you have on your soldering iron. Trying it out on real world components and cable is the best way to find out if it flows well, and makes a good joint. Check the joints you make after a month for any signs of corrosion as a further test. Stuart K5KVH ___ 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] CP1 Power Handling
Does anyone know what modifications would need to be made to the CP1 Directional Coupler in order to get it to handle 200W at 20dB attenuation? I'd like to use the CP1 as a cost effective means of extending the useful range of my OHR WM-2 QRP Wattmeter, but 30dB is more attenuation than I want and the power handling at 20dB is not high enough. Thanks, Michael N9BDF ___ 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] CP1 Power Handling
You have a couple options. The flux density is higher, and therefore heating, with lower number of turns. They also go to a -43 mix (higher permeability) for the lower turns to keep the shunt reactance of the voltage xfmr high at 1.8 MHz. If you don't care about 1.8 MHz, you might be able to get by with 10 turns on the -61 cores... I would have to do the math. The other option is to stick with the -43 material, but get larger cores. I'm pretty sure they make the FT50A and FT50B (which are thicker) in -43 material, or you could go to a FT68 or FT82 if they'll fit. The best bet would probably be FT50A-43, since we know it would fit physically. I have a spreadsheet that I use that calculates these things for me... I can plug these in to see what would work if you like. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Does anyone know what modifications would need to be made to the CP1 Directional Coupler in order to get it to handle 200W at 20dB attenuation? I'd like to use the CP1 as a cost effective means of extending the useful range of my OHR WM-2 QRP Wattmeter, but 30dB is more attenuation than I want and the power handling at 20dB is not high enough. Thanks, Michael N9BDF ___ 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] CP1 Power Handling
Larry, If you have the time, I'd certainly appreciate it if you'd run it through your spreadsheet for me. Thanks! -Michael == You have a couple options. The flux density is higher, and therefore heating, with lower number of turns. They also go to a -43 mix (higher permeability) for the lower turns to keep the shunt reactance of the voltage xfmr high at 1.8 MHz. If you don't care about 1.8 MHz, you might be able to get by with 10 turns on the -61 cores... I would have to do the math. The other option is to stick with the -43 material, but get larger cores. I'm pretty sure they make the FT50A and FT50B (which are thicker) in -43 material, or you could go to a FT68 or FT82 if they'll fit. The best bet would probably be FT50A-43, since we know it would fit physically. I have a spreadsheet that I use that calculates these things for me... I can plug these in to see what would work if you like. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Does anyone know what modifications would need to be made to the CP1 Directional Coupler in order to get it to handle 200W at 20dB attenuation? I'd like to use the CP1 as a cost effective means of extending the useful range of my OHR WM-2 QRP Wattmeter, but 30dB is more attenuation than I want and the power handling at 20dB is not high enough. Thanks, Michael N9BDF ___ 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] CP1 Power Handling
A quick check shows that no small size cores will work for -43 material with 10T at 1.8 MHz and 200W. However, FT50B cores come close, and are fine at 3.5 MHz. FT50B is twice the thickness of the FT50A, and would fit on the board because the thickness would only add height. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Larry, If you have the time, I'd certainly appreciate it if you'd run it through your spreadsheet for me. Thanks! -Michael == You have a couple options. The flux density is higher, and therefore heating, with lower number of turns. They also go to a -43 mix (higher permeability) for the lower turns to keep the shunt reactance of the voltage xfmr high at 1.8 MHz. If you don't care about 1.8 MHz, you might be able to get by with 10 turns on the -61 cores... I would have to do the math. The other option is to stick with the -43 material, but get larger cores. I'm pretty sure they make the FT50A and FT50B (which are thicker) in -43 material, or you could go to a FT68 or FT82 if they'll fit. The best bet would probably be FT50A-43, since we know it would fit physically. I have a spreadsheet that I use that calculates these things for me... I can plug these in to see what would work if you like. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Does anyone know what modifications would need to be made to the CP1 Directional Coupler in order to get it to handle 200W at 20dB attenuation? I'd like to use the CP1 as a cost effective means of extending the useful range of my OHR WM-2 QRP Wattmeter, but 30dB is more attenuation than I want and the power handling at 20dB is not high enough. Thanks, Michael N9BDF ___ 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] CP1 Power Handling
Larry, Thanks! 200W is probably a bit on the high side for my needs (safety margin), so this looks pretty good. -Michael -Original Message- From: Larry Phipps [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 07, 2006 10:29 AM To: Linden, Mike (BRC-Hes) Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] CP1 Power Handling A quick check shows that no small size cores will work for -43 material with 10T at 1.8 MHz and 200W. However, FT50B cores come close, and are fine at 3.5 MHz. FT50B is twice the thickness of the FT50A, and would fit on the board because the thickness would only add height. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Larry, If you have the time, I'd certainly appreciate it if you'd run it through your spreadsheet for me. Thanks! -Michael ___ 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] CP1 Power Handling
Hi Michael, I designed the CP1 for Elecraft and in the process I performed many tests to evaluate the power handling capabilities. The power is limited by heating of the core and that is primarily a function of flux density and time. The published specification allows the rated power to be applied for long periods of time without excessive heating. The flux density is proportional to the applied voltage, i.e. square root of power, and inversely proportional to the number of turns, cross sectional area, and frequency. For a 20 dB coupler the number of turns is fixed at 10. Because of the small turns count type 43 material was chosen to provide sufficient inductance to maintain performance at the lowest frequency. Unfortunately, type 43 has a relatively low Curie Temperature, that is, the temperature at which the magnetic properties of the core disappear. Other core materials have much higher temperature ratings and lower loss, but they do not provide sufficient inductance for good performance on 160 meters. So what does all this mean? I suggest that the easiest thing for you to do would be to stack three cores together at each position. It will be easier to wind the cores if you use some sort of adhesive to hold the cores together. This will provide about 9 times the power handling capability and meet your power requirement. If you don't hold the key down for 5 minutes even better. You can order the extra cores from Elecraft. 73, Bob, N6CM - Original Message - From: Linden, Mike (BRC-Hes) [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Tuesday, March 07, 2006 6:33 AM Subject: [Elecraft] CP1 Power Handling Does anyone know what modifications would need to be made to the CP1 Directional Coupler in order to get it to handle 200W at 20dB attenuation? I'd like to use the CP1 as a cost effective means of extending the useful range of my OHR WM-2 QRP Wattmeter, but 30dB is more attenuation than I want and the power handling at 20dB is not high enough. Thanks, Michael N9BDF ___ 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] CP1 Power Handling
It might also make sense to increase the turns to 14, which would give a coupling factor of 23 dB, and much more safety margin. Larry N8LP Linden, Mike (BRC-Hes) wrote: Larry, Thanks! 200W is probably a bit on the high side for my needs (safety margin), so this looks pretty good. -Michael -Original Message- From: Larry Phipps [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 07, 2006 10:29 AM To: Linden, Mike (BRC-Hes) Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] CP1 Power Handling A quick check shows that no small size cores will work for -43 material with 10T at 1.8 MHz and 200W. However, FT50B cores come close, and are fine at 3.5 MHz. FT50B is twice the thickness of the FT50A, and would fit on the board because the thickness would only add height. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Larry, If you have the time, I'd certainly appreciate it if you'd run it through your spreadsheet for me. Thanks! -Michael ___ 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] Using an Amplifier with a K2/100
Hi, After using my K2/100 for nearly a year I finally got it hooked up to my Ameritron AL-811 amplifier. Previously, I had used the amp only with my IC-746Pro. I build a switch box to switch the amp keying. It also switches out the amplifier ALC (not that the K2/100 uses it) and it switches the MFJ-216 Amplifier Saver as well. BTW, I had to move the K2/100 about 15 inches from the amplifier to get rid of audio distortion. That has been discussed before here so it is nothing new. The K2/100 and the amp worked together just fine. With the K2/100 power out at about 55 watts the amp output was about 500 watts. I'm sure with 65 watts the amp would have easily put out it's full 600 watts. The extra power sure caused a stir in the ether. Toward the end of an hour I actually had a pileup going. Imagine having a pileup in Colorado. Just more incentive for the Elecraft amplifiers. The K2/100 just keeps amazing me as to it's capabilities. (I'm still trying to figure out all the ins and outs of the DSPmost of the time I don't think I really need it. But, hey buy it anywayWayne and Eric can always use the business.) Have a great day everyone. Jim, AB0UK K2/100 S/N 4787 __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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] CP1 Power Handling
Stacking cores can also help increase power handling capability without taking more pcb space (providing the core is flat on the pcb). -- Alan wb6zqz -- Original message -- From: Larry Phipps [EMAIL PROTECTED] A quick check shows that no small size cores will work for -43 material with 10T at 1.8 MHz and 200W. However, FT50B cores come close, and are fine at 3.5 MHz. FT50B is twice the thickness of the FT50A, and would fit on the board because the thickness would only add height. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Larry, If you have the time, I'd certainly appreciate it if you'd run it through your spreadsheet for me. Thanks! -Michael == You have a couple options. The flux density is higher, and therefore heating, with lower number of turns. They also go to a -43 mix (higher permeability) for the lower turns to keep the shunt reactance of the voltage xfmr high at 1.8 MHz. If you don't care about 1.8 MHz, you might be able to get by with 10 turns on the -61 cores... I would have to do the math. The other option is to stick with the -43 material, but get larger cores. I'm pretty sure they make the FT50A and FT50B (which are thicker) in -43 material, or you could go to a FT68 or FT82 if they'll fit. The best bet would probably be FT50A-43, since we know it would fit physically. I have a spreadsheet that I use that calculates these things for me... I can plug these in to see what would work if you like. 73, Larry N8LP Linden, Mike (BRC-Hes) wrote: Does anyone know what modifications would need to be made to the CP1 Directional Coupler in order to get it to handle 200W at 20dB attenuation? I'd like to use the CP1 as a cost effective means of extending the useful range of my OHR WM-2 QRP Wattmeter, but 30dB is more attenuation than I want and the power handling at 20dB is not high enough. Thanks, Michael N9BDF ___ 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] CP1 Power Handling
Bob, have you seen any difference between stacked cores and solid ones of the same total thickness? In designed my wattmeters, I found more heating with stacked cores... at least for one combination. The FT50B core is the same thickness as 2.66 stacked FT50 cores, or 2 FT50A cores. Larry N8LP Robert Friess wrote: Hi Michael, I designed the CP1 for Elecraft and in the process I performed many tests to evaluate the power handling capabilities. The power is limited by heating of the core and that is primarily a function of flux density and time. The published specification allows the rated power to be applied for long periods of time without excessive heating. The flux density is proportional to the applied voltage, i.e. square root of power, and inversely proportional to the number of turns, cross sectional area, and frequency. For a 20 dB coupler the number of turns is fixed at 10. Because of the small turns count type 43 material was chosen to provide sufficient inductance to maintain performance at the lowest frequency. Unfortunately, type 43 has a relatively low Curie Temperature, that is, the temperature at which the magnetic properties of the core disappear. Other core materials have much higher temperature ratings and lower loss, but they do not provide sufficient inductance for good performance on 160 meters. So what does all this mean? I suggest that the easiest thing for you to do would be to stack three cores together at each position. It will be easier to wind the cores if you use some sort of adhesive to hold the cores together. This will provide about 9 times the power handling capability and meet your power requirement. If you don't hold the key down for 5 minutes even better. You can order the extra cores from Elecraft. 73, Bob, N6CM - Original Message - From: Linden, Mike (BRC-Hes) [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Tuesday, March 07, 2006 6:33 AM Subject: [Elecraft] CP1 Power Handling Does anyone know what modifications would need to be made to the CP1 Directional Coupler in order to get it to handle 200W at 20dB attenuation? I'd like to use the CP1 as a cost effective means of extending the useful range of my OHR WM-2 QRP Wattmeter, but 30dB is more attenuation than I want and the power handling at 20dB is not high enough. Thanks, Michael N9BDF ___ 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] CP1 Power Handling
Bob What combination of core/turns would give up to 40dB and able to handle 100 watts and what frequency range would it have? Main interest is HF 73 Jim VE3TTN On Mar 7, 2006, at 11:46, Robert Friess wrote: Hi Michael, I designed the CP1 for Elecraft and in the process I performed many tests to evaluate the power handling capabilities. The power is limited by heating of the core and that is primarily a function of flux density and time. The published specification allows the rated power to be applied for long periods of time without excessive heating. ___ 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] CP1 Power Handling
Robert, Thanks for the insight and alternate solution! -Michael -Original Message- From: Robert Friess [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 07, 2006 10:46 AM To: Linden, Mike (BRC-Hes); elecraft@mailman.qth.net Subject: Re: [Elecraft] CP1 Power Handling Hi Michael, I designed the CP1 for Elecraft and in the process I performed many tests to evaluate the power handling capabilities. The power is limited by heating of the core and that is primarily a function of flux density and time. The published specification allows the rated power to be applied for long periods of time without excessive heating. The flux density is proportional to the applied voltage, i.e. square root of power, and inversely proportional to the number of turns, cross sectional area, and frequency. For a 20 dB coupler the number of turns is fixed at 10. Because of the small turns count type 43 material was chosen to provide sufficient inductance to maintain performance at the lowest frequency. Unfortunately, type 43 has a relatively low Curie Temperature, that is, the temperature at which the magnetic properties of the core disappear. Other core materials have much higher temperature ratings and lower loss, but they do not provide sufficient inductance for good performance on 160 meters. So what does all this mean? I suggest that the easiest thing for you to do would be to stack three cores together at each position. It will be easier to wind the cores if you use some sort of adhesive to hold the cores together. This will provide about 9 times the power handling capability and meet your power requirement. If you don't hold the key down for 5 minutes even better. You can order the extra cores from Elecraft. ___ 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 with 3080 board
All, FYI, I just finished upgrading my KX1 to a four band radio! It is now capable of 20m, 30m, 40m, and 80m. Assembly of the new module for 30 and 80 meters was straightforward and well worth the effort. Ron produced an excellent instruction manual that greatly simplfied the process. Many thanks to Wayne and Eric for allowing me to be one of the field testers for the new module. I'll be in Folsom CA on a business trip this week and will be on the air in the evenings near the QRP frequencies on 80m and 40m. Give me a shout! 73, Spence W7CSW FYI, I'm not affiliated with Elecraft other than owning a KX1 and a K2 and I LOVE THEIR PRODUCTS! I recommend the upgrade to anybody wanting more than three bands on the KX1. ___ 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] EQP scoring clarified
We've added a bit more description regarding scoring to the EQP rules. If you were confused on any scoring issue, please review the rules page again and let me know if it now makes more sense. 73, Wayne N6KR --- 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] next solar cycle: article
Just published on the Scientific American website is an article explaining what we might see in the next solar cycle. Very interesting reading. See: www.sciam.com/article.cfm?chanID=sa007articleID=000301B5-B8CD-140C- B8CD83414B7F 73, Wayne N6KR --- 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] CP1 Power Handling
That would not be very practical, because it would be 100 turns. I suggest using the existing 30dB design, and add external inline BNC attenuators like the Mini-Circuits HAT-10. That would give you 40 dB total. Larry N8LP Jim Byers wrote: Bob What combination of core/turns would give up to 40dB and able to handle 100 watts and what frequency range would it have? Main interest is HF 73 Jim VE3TTN On Mar 7, 2006, at 11:46, Robert Friess wrote: Hi Michael, I designed the CP1 for Elecraft and in the process I performed many tests to evaluate the power handling capabilities. The power is limited by heating of the core and that is primarily a function of flux density and time. The published specification allows the rated power to be applied for long periods of time without excessive heating. ___ 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] KDSP2 sound on 14.249 Mhz
hi all, yesterday I finished the KDSP2 kit and mounted it. It works as expected - but when playing a bit with its possibility I found a regular (abt. 1 Hz) birdie sound when I am listening on 14.249 (and quite a bit up and down this frequency) when the Display button is pressed to show the filter setting. Is this normal or is it a problem with my K2 or the KDSP2? 73! de Werner OE9FWV -- Running after women never hurt anybody - it's catching them that does the damage. Email powered by Pegasus Mail free at http://www.pmail.com Homepage: http://www.qsl.net/oe9fwv/ Fone +43 5522 75013 Fax +43 820 555 85 2621 Mobile +43 664 6340014 Elecraft K2 #5203 ___ 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] KDSP2 sound on 14.249 Mhz
Hello Werner! yesterday I finished the KDSP2 kit and mounted it. It works as expected - but when playing a bit with its possibility I found a regular (abt. 1 Hz) birdie sound when I am listening on 14.249 ... This is normal auxbus traffic, only present when the menu or clock is being displayed. This is explained on page 38 of the KDSP2 manual Receiver noise heard when Clock or DSP menu displayed. Enjoy your KDSP2! 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] next solar cycle: article
Wayne, Thanks for a pointer to an interesting read.I was too busy with a divorce at the peak of the last cycle, but the previous one was sure fun. Since I like both HF and VHF/UHF weak signal this cycle has great promise. A good solar wind to energize, and the odd explosion to make AU fun on 2 and higher. The back end of the cycle could be even more fun for those of us who enjoy the higher bands ( ya just gotta love aurora). But since I have K2 #5226 running good DX, I hope for a *very* quiet solar minimum. I'm counting on my K2 to finish my 80m DXCC for my 5BDXCC. And perhaps the MOAA (Mother of All Amplifiers) to seal the deal. Regards, Joe N9JR PS - Think about a transverter for 903MHz. Instant sweetness. wayne burdick [EMAIL PROTECTED] wrote: Just published on the Scientific American website is an article explaining what we might see in the next solar cycle. Very interesting reading. See: www.sciam.com/article.cfm?chanID=sa007articleID=000301B5-B8CD-140C- B8CD83414B7F 73, Wayne N6KR --- 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] (no subject)
Bill, I beleive you are asking about an Amp Keying line for the basic K2 -- Take a look at the AMP keying partial kit from Elecraft and also look at Tom Hammond's website www.n0ss.net for an updated version - I believe Elecraft will be adopting Tom's improved Amp Keying circuit for the K2, but I don't know that with any degree of certainty - I am not an 'insider' for such Elecraft business decisions. I do know that Tom's circuit works FB. OTOH, if you are asking about a CW 'PTT' input to the K2 to interrupt keying until an external PTT signal is present, take a look at my website http://w3fpr.qrpradio.com article on CW PTT for the K2. This circuit will prevent keying the K2 until an 'OK to transmit' signal is received from a sequencer or footswitch - works great for the VHF crowd that needs to delay the RF output until all switching is ready for RF or for those who have amplifiers with slow T/R switching. 73, Don W3FPR -Original Message- Anybody have any good ideas about where to connect to the K2 circuitry to pick off a PTT low keying line. The K2/100 has this available on the back panel, but the QRP version doesn't. Any ideas? Any curent limitations? Bill, W7QQ ___ 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] Its here!
Fellow Elecrafters: The new rig arrived from Alan today, and I expect to put it on the air tomorrow. What is considered an acceptable level of SWR for a K2/100? 73, Steve Kercel AA4AK K2 S/N# 5383 ___ 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] next solar cycle: article
Joe: I'd be very surprised if you'd need the MOAA to work 100 countries on 80m. The K2 should handle it easily. Comment on solar activity: During my time at ORNL we were occasionally concerned with modeling the long term history of solar activity, and we noticed that the solar cycle is really a 22 year cycle rather than 11 years, with a fairly consistent pattern of a strong peak followed by a weaker second peak 11 years later. I was active in the 1978-83 period, and worked through that solar maximum. I made 5BDXCC in 1981 (DX on 80m is workable during high flux), but I did not hear fellow hams telling war stories about their spectacular results, as they did, for example, in the late 50s or early 90s. I was not active in the 90s, but I did notice that a lot of my ORNL buddies were telling war stories about their consistently spectacular DX on 10 meters in 1990-91. In contrast, although a lot of people are wondering when we'll hit bottom and head back up the hill, I do not hear any pining for the halcyon days of the early 2000s. I suspect that the last peak was soso. Thus, based on these anecdotal observations, I've been expecting big things for the next maximum. Evidently, the SA article reflects relatively recent insights into the internal solar forces driving sunspot activity. This suggests a causally-based model of sunspot activity, rather than simply curve fitting and extrapolation of historic data, as most researchers have done in the past. I'll be very interested in how their model holds up. 73, Steve Kercel AA4AK K2 S/N# 5383 At 09:46 PM 3/7/2006, Joseph Reed wrote: Wayne, Thanks for a pointer to an interesting read.I was too busy with a divorce at the peak of the last cycle, but the previous one was sure fun. Since I like both HF and VHF/UHF weak signal this cycle has great promise. A good solar wind to energize, and the odd explosion to make AU fun on 2 and higher. The back end of the cycle could be even more fun for those of us who enjoy the higher bands ( ya just gotta love aurora). But since I have K2 #5226 running good DX, I hope for a *very* quiet solar minimum. I'm counting on my K2 to finish my 80m DXCC for my 5BDXCC. And perhaps the MOAA (Mother of All Amplifiers) to seal the deal. Regards, Joe N9JR PS - Think about a transverter for 903MHz. Instant sweetness. wayne burdick [EMAIL PROTECTED] wrote: Just published on the Scientific American website is an article explaining what we might see in the next solar cycle. Very interesting reading. See: www.sciam.com/article.cfm?chanID=sa007articleID=000301B5-B8CD-140C- B8CD83414B7F 73, Wayne N6KR --- 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 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] Its here!
Stephen W. Kercel wrote: What is considered an acceptable level of SWR for a K2/100? The latest K2/100 firmware and modification level will allow an SWR of up to 2:1 before it starts reducing the power level to protect the finals. You can operate with higher SWR, but you will have less power output. -- 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
RE: [Elecraft] Its here!
Steve, Strive for SWR 1.5 although the KPA100 will not throtle back power level until SWR 2.0 is exceeded. 73, Don W3FPR -Original Message- The new rig arrived from Alan today, and I expect to put it on the air tomorrow. What is considered an acceptable level of SWR for a K2/100? 73, Steve Kercel AA4AK K2 S/N# 5383 ___ 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] KDSP2 sound on 14.249 Mhz
hi Lyle, txs for answering. Lyle Johnson schrieb am 7 Mar 2006 um 15:28: This is normal auxbus traffic, only present when the menu or clock is being displayed. This is explained on page 38 of the KDSP2 manual Receiver noise heard when Clock or DSP menu displayed. you are right. I should have read the manual completely ;-) cheers, Werner -- You speak of beer, you speak my language -- Al Bundy PGP-Key: http://www.qsl.net/oe9fwv/furlan.asc Fone +43 5522 75013 Fax +43 820 555 85 2621 Mobile +43 664 6340014 K2 #5203 ___ 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
