K3: SSB vs. CW/DATA A with TVTR
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K3: SSB vs. CW/DATA A with TVTR
 
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When running my K3 with my DB6NT/Kuhne transverter on 144MHz IF out is
set to 1mW. That's o.k. for both CW and DATA A (WSJT), when 1mW is good for 25 W out at the TVTR. Thats perfect for my 2x GU74b amp. But in SSB it's completely different. My Heil Pro Set (electret) is working great but with mic gain set to "10" and compress to "20" ALC shows 6 to 7 units, compress some 10 but there aint no 1mW out at the IF out anymore. It's quite below, app. 0.5mW in the peak and thats good for not more than 10 W out at the transverter. I wonder why in SSB the IF out is much lower than in CW and DATA A mode. More mic gain aint help of course. Any idea what I'm doing wrong (probably?). Udo, DK5YA -- ****************************************** Webs by DK5YA: * http://www.mmmonvhf.de/ [editor]* http://www.vhfdx.de/ [owner] * http://www.palekastro.de/ [owner] * http://www.solweb.de/ [owner] * http://www.spessartwetter.de/ [owner] * ****************************************** ______________________________________________________________ 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: K3: SSB vs. CW/DATA A with TVTR
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Udo,
If you are measuring average power rather than peak power, you will see a marked reduction in average power with SSB even though the peaks are the same power as CW and DATA. Set your microphone level in the order indicated in the manual (you can use TX TEST). Set Compression to zero, then adjust the mic gain until you see 5 to 7 bars on the ALC meter. After that, increase the compression as desired. 73, Don W3FPR On 9/7/2011 8:58 AM, Udo Langenohl - DK5YA wrote: > When running my K3 with my DB6NT/Kuhne transverter on 144MHz IF out is > set to 1mW. That's o.k. for both CW and DATA A (WSJT), when 1mW is good > for 25 W out at the TVTR. Thats perfect for my 2x GU74b amp. > But in SSB it's completely different. My Heil Pro Set (electret) is > working great but with mic gain set to "10" and compress to "20" ALC > shows 6 to 7 units, compress some 10 but there aint no 1mW out at the IF > out anymore. It's quite below, app. 0.5mW in the peak and thats good for > not more than 10 W out at the transverter. > I wonder why in SSB the IF out is much lower than in CW and DATA A mode. > More mic gain aint help of course. > > Any idea what I'm doing wrong (probably?). > > Udo, DK5YA 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: K3: SSB vs. CW/DATA A with TVTR
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In reply to this post by Udo Langenohl - DK5YA
Hi Udo
Have you tried adjusting the "TXG VCE" in the configuration menu ? Regards John G4ZTR -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Udo Langenohl - DK5YA Sent: 07 September 2011 13:59 To: [hidden email] Subject: [Elecraft] K3: SSB vs. CW/DATA A with TVTR When running my K3 with my DB6NT/Kuhne transverter on 144MHz IF out is set to 1mW. That's o.k. for both CW and DATA A (WSJT), when 1mW is good for 25 W out at the TVTR. Thats perfect for my 2x GU74b amp. But in SSB it's completely different. My Heil Pro Set (electret) is working great but with mic gain set to "10" and compress to "20" ALC shows 6 to 7 units, compress some 10 but there aint no 1mW out at the IF out anymore. It's quite below, app. 0.5mW in the peak and thats good for not more than 10 W out at the transverter. I wonder why in SSB the IF out is much lower than in CW and DATA A mode. More mic gain aint help of course. Any idea what I'm doing wrong (probably?). Udo, DK5YA -- ****************************************** Webs by DK5YA: * http://www.mmmonvhf.de/ [editor]* http://www.vhfdx.de/ [owner] * http://www.palekastro.de/ [owner] * http://www.solweb.de/ [owner] * http://www.spessartwetter.de/ [owner] * ****************************************** ______________________________________________________________ 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 __________ Information from ESET NOD32 Antivirus, version of virus signature database 6443 (20110907) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 6443 (20110907) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.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 |
Re: K3: SSB vs. CW/DATA A with TVTR
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In reply to this post by Don Wilhelm-4
Don,
yes I'm measuring both peak and average power. I checked IFout pwr with my HP436A both in SSB and DATA A/CW. Did the same with my Bird peak/avg meter and the 25W head at the TVTR. Mic gain shows up to 7 bars in the peak and with compression 0 or up to 20 there's no increase. Max is 0.45 mW in SSB, says the HP463A, and 1.1 mW in CW/DATA A. I'll try ''TXG VCE'', John G4ZTR had that idea. 73 Udo, DK5YA Don Wilhelm wrote: > Udo, > > If you are measuring average power rather than peak power, you will see > a marked reduction in average power with SSB even though the peaks are > the same power as CW and DATA. > > Set your microphone level in the order indicated in the manual (you can > use TX TEST). Set Compression to zero, then adjust the mic gain until > you see 5 to 7 bars on the ALC meter. > After that, increase the compression as desired. > > 73, > Don W3FPR > > On 9/7/2011 8:58 AM, Udo Langenohl - DK5YA wrote: >> When running my K3 with my DB6NT/Kuhne transverter on 144MHz IF out is >> set to 1mW. That's o.k. for both CW and DATA A (WSJT), when 1mW is good >> for 25 W out at the TVTR. Thats perfect for my 2x GU74b amp. >> But in SSB it's completely different. My Heil Pro Set (electret) is >> working great but with mic gain set to "10" and compress to "20" ALC >> shows 6 to 7 units, compress some 10 but there aint no 1mW out at the IF >> out anymore. It's quite below, app. 0.5mW in the peak and thats good for >> not more than 10 W out at the transverter. >> I wonder why in SSB the IF out is much lower than in CW and DATA A mode. >> More mic gain aint help of course. >> >> Any idea what I'm doing wrong (probably?). >> >> Udo, DK5YA > -- ****************************************** Webs by DK5YA: * http://www.mmmonvhf.de/ [editor]* http://www.vhfdx.de/ [owner] * http://www.palekastro.de/ [owner] * http://www.solweb.de/ [owner] * http://www.spessartwetter.de/ [owner] * ****************************************** ______________________________________________________________ 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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