KX3 and Data modes
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Regarding the effectivity of the KX3 on SSB, I can relate the
effectivity of the K3/10 on SSB (equivalent RF power). I previously thought I was running about 15w on 20m but with a new element for my Bird43 I know that is was actually 11.5w. CW benefits from the effective reduction in bandwidth (50-Hz) that many top CW ops exhibit which offers up to 17 dB advantage. Say you have an average of 250-Hz and that advantage is 10-dB. JT65 has a theoretical 30-dB advantage and practically one could say 26 dB. Other narrow-band digital modes should offer increased performance, also. QRSS does by the fact the signal is averaged over long time periods. I have been checking into the Elecraft SSB Net fairly regularly and being copied by Phil, NS7P who is 1620 miles from me. I run an old Hygain TH3mk4 tribander at 50-foot which helps. Now I have a new HF amp which I have been running at 200w but can run up to 270w with 11.5w drive. That was necessary to make it last weekend during the solar flare. 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep [hidden email] "Kits made by KL7UW" http://www.kl7uw.com/kits.htm ====================================== ______________________________________________________________ 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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How do you know that the Bird measurement is actually 11.5 watts? The accuracy claimed by Bird for a new element is +/- 5% of full scale. If you have a 50 watt element your reading is between 9 and 14 watts. If you have a 100 watt element it is between 6.5 and 16.5 watts.
Willis 'Cookie' Cooke K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart ________________________________ From: Edward R. Cole <[hidden email]> To: [hidden email] Sent: Tuesday, March 13, 2012 11:59 AM Subject: [Elecraft] KX3 and Data modes Regarding the effectivity of the KX3 on SSB, I can relate the effectivity of the K3/10 on SSB (equivalent RF power). I previously thought I was running about 15w on 20m but with a new element for my Bird43 I know that is was actually 11.5w. CW benefits from the effective reduction in bandwidth (50-Hz) that many top CW ops exhibit which offers up to 17 dB advantage. Say you have an average of 250-Hz and that advantage is 10-dB. JT65 has a theoretical 30-dB advantage and practically one could say 26 dB. Other narrow-band digital modes should offer increased performance, also. QRSS does by the fact the signal is averaged over long time periods. I have been checking into the Elecraft SSB Net fairly regularly and being copied by Phil, NS7P who is 1620 miles from me. I run an old Hygain TH3mk4 tribander at 50-foot which helps. Now I have a new HF amp which I have been running at 200w but can run up to 270w with 11.5w drive. That was necessary to make it last weekend during the solar flare. 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep [hidden email] "Kits made by KL7UW" http://www.kl7uw.com/kits.htm ====================================== ______________________________________________________________ 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 |
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I think he stated earlier that he was using a freshly calibrated 25H
element. 73, -Doug, W7KF http://www.w7kf.com On 03/13/2012 12:24 PM, WILLIS COOKE wrote: > How do you know that the Bird measurement is actually 11.5 watts? The accuracy claimed by Bird for a new element is +/- 5% of full scale. If you have a 50 watt element your reading is between 9 and 14 watts. If you have a 100 watt element it is between 6.5 and 16.5 watts. > > Willis 'Cookie' Cooke > K5EWJ& Trustee N5BPS, USS Cavalla, USS Stewart ______________________________________________________________ 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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Since Bird does not advertise a 25H, I don't know what that is and as far as I know they have never made a 25 watt element that is for HF. They do make a 25A,B,C,D &E which cover 25 to 1000 mHz in 5 bands, but the lowest element for HF is the 50H. A 25H would imply a 25 watt 2-30 mHz element which may have been manufactured during the 70 or more years since the Bird 43 came out in which case the range would be 10.25 to 12.5 watts if the element and meter are in spec. The current Bird chart states that a 25 watt element is not available.
Willis 'Cookie' Cooke K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart ________________________________ From: Doug Smith <[hidden email]> To: [hidden email] Sent: Tuesday, March 13, 2012 1:33 PM Subject: Re: [Elecraft] KX3 and Data modes I think he stated earlier that he was using a freshly calibrated 25H element. 73, -Doug, W7KF http://www.w7kf.com On 03/13/2012 12:24 PM, WILLIS COOKE wrote: > How do you know that the Bird measurement is actually 11.5 watts? The accuracy claimed by Bird for a new element is +/- 5% of full scale. If you have a 50 watt element your reading is between 9 and 14 watts. If you have a 100 watt element it is between 6.5 and 16.5 watts. > > Willis 'Cookie' Cooke > K5EWJ& Trustee N5BPS, USS Cavalla, USS Stewart ______________________________________________________________ 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 |
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In reply to this post by Doug Smith [W7KF]
Yes, Ed did make that statement BUT ---
The freshly calibrated slug does not make any difference - read and understand the specification correctly - the accuracy is speced at +/- 5% OF FULL SCALE right after calibration. So the error with that slug is 1.25 watts - and that applies anywhere on the scale. A reading of 11.5 watts can be anywhere between 10.25 watts and 12.75 watts. That kind of specification is typical of analog wattmeters - they all have a spec in a percentage of full scale. Many good digital wattmeters have a spec that is a percentage of the reading rather than a percentage of full scale. I have ranted about those facts of wattmeters many times on this reflector. 73, Don W3FPR On 3/13/2012 2:33 PM, Doug Smith wrote: > I think he stated earlier that he was using a freshly calibrated 25H > element. > > 73, > -Doug, W7KF > http://www.w7kf.com > ______________________________________________________________ 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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In reply to this post by Cookie
I think the frequency range being discussed is MHz not mHz.
Regards, Mike VP8NO On 13/03/2012 15:51, WILLIS COOKE wrote: > Since Bird does not advertise a 25H, I don't know what that is and as far as I know they have never made a 25 watt element that is for HF. They do make a 25A,B,C,D&E which cover 25 to 1000 mHz in 5 bands, but the lowest element for HF is the 50H. A 25H would imply a 25 watt 2-30 mHz element which may have been manufactured during the 70 or more years since the Bird 43 came out in which case the range would be 10.25 to 12.5 watts if the element and meter are in spec. The current Bird chart states that a 25 watt element is not available. > > Willis 'Cookie' Cooke > K5EWJ& Trustee N5BPS, USS Cavalla, USS Stewart ______________________________________________________________ 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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In reply to this post by Cookie
There are a 25H elements in existence -- just google "bird 25H".
Here's a couple: http://www.ebay.com/itm/370381238917 http://www.chuckmartin.com/search/25H I think that bird does not stock them but will be happy to make them on demand. Certainly, they have made a lot of them in the past. They would also be happy to calibrate an existing unit. I have no doubt that the original poster has what he says he has. 73, -Doug, W7KF On 03/13/2012 12:51 PM, WILLIS COOKE wrote: > Since Bird does not advertise a 25H, I don't know what that is and as > far as I know they have never made a 25 watt element that is for HF. > They do make a 25A,B,C,D &E which cover 25 to 1000 mHz in 5 bands, > but the lowest element for HF is the 50H. A 25H would imply a 25 watt > 2-30 mHz element which may have been manufactured during the 70 or > more years since the Bird 43 came out in which case the range would be > 10.25 to 12.5 watts if the element and meter are in spec. The > current Bird chart states that a 25 watt element is not available. > Willis 'Cookie' Cooke > K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart > ------------------------------------------------------------------------ > ** > 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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In reply to this post by Edward R Cole
For reference purposes, when Ed checks into the SSB net with me, I usually
have my 2-el Quad pointed east, broadside to his direction (north). I usually hear him OK at his 12+/- watts. Phil, NS7P -----Original Message----- From: [hidden email] [mailto:[hidden email]]On Behalf Of Edward R. Cole Sent: Tuesday, March 13, 2012 9:59 AM To: [hidden email] Subject: [Elecraft] KX3 and Data modes Regarding the effectivity of the KX3 on SSB, I can relate the effectivity of the K3/10 on SSB (equivalent RF power). I previously thought I was running about 15w on 20m but with a new element for my Bird43 I know that is was actually 11.5w. CW benefits from the effective reduction in bandwidth (50-Hz) that many top CW ops exhibit which offers up to 17 dB advantage. Say you have an average of 250-Hz and that advantage is 10-dB. JT65 has a theoretical 30-dB advantage and practically one could say 26 dB. Other narrow-band digital modes should offer increased performance, also. QRSS does by the fact the signal is averaged over long time periods. I have been checking into the Elecraft SSB Net fairly regularly and being copied by Phil, NS7P who is 1620 miles from me. I run an old Hygain TH3mk4 tribander at 50-foot which helps. Now I have a new HF amp which I have been running at 200w but can run up to 270w with 11.5w drive. That was necessary to make it last weekend during the solar flare. 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep [hidden email] "Kits made by KL7UW" http://www.kl7uw.com/kits.htm ====================================== ______________________________________________________________ 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 |
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Alaska is easy copy for me as well as Phil, who is located further south
of me in Oregon. My doublet, which runs N-S, is in an inverted V configuration which does help 'round out' its reception pattern. I am not sure why but QRP signals from Palmer are normally strong. Juneau was problematic this morning but we have had some unusual conditions the last week plus a time change. Kevin. KD5ONS On 3/13/2012 12:23 PM, Phillip Shepard wrote: > For reference purposes, when Ed checks into the SSB net with me, I usually > have my 2-el Quad pointed east, broadside to his direction (north). I > usually hear him OK at his 12+/- watts. > > Phil, NS7P > > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]]On Behalf Of Edward R. Cole > Sent: Tuesday, March 13, 2012 9:59 AM > To: [hidden email] > Subject: [Elecraft] KX3 and Data modes > > ... > > I have been checking into the Elecraft SSB Net fairly regularly and > being copied by Phil, NS7P who is 1620 miles from me. I run an old > Hygain TH3mk4 tribander at 50-foot which helps. Now I have a new HF > amp which I have been running at 200w but can run up to 270w with > 11.5w drive. That was necessary to make it last weekend during the > solar flare. > > > 73, Ed - KL7UW, WD2XSH/45 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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