Re: [Elecraft] K3 in ARRL10
I have the 6m ARR P50VDG Gasfet preamp and KVX3. I wondered if the P50VDG may have gain at 28-MHz? I entered 28.400 and alternated between the P50VDG and the internal PRE. There were no signals to check this on but with white noise the P50VDG shows slightly less s-meter reading than the PRE. No way to determining whether that is due to different gain or lower noise figure? With both off s-meter reads zero with PRE S-2. Antenna is Hygain TH3mk4 triband yagi. 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw, 432-100w*, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.com == *temp not in service __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Jorge, It seems that despite your problem, you managed to have the highest score as a multi-single: Call QSOs Mults hr Score Club Non-NA M/S HP CW5W(@CX6VM) 1584 23424 1,232,244 LS1D 1617 2251,137,150 CE4CT 1770 21028 1,092,840 LU Contest Group PJ2T 1703 17927981,994 PVRC CW5R 1320 135 785,000 Araucaria DX PT3T(@PY3CM) 20636750,252 Araucaria DX LU1UM 1064 18230559,832 LU Contest Group DK5QN 382 10219131,172 RR DX ED1R 339 10016114,600 Radio Club Henares ZY6Z(@PY6HD) 30089 15:28 77,964 Araucaria DX Congrats! 73, Bob W5OV > Hi Guy, > > Thanks for the suggestion. > > Will try 10 mts with the PRE next time I go to the station. Unfortunately > I > didn´t tried it during the contest. > > On low bands sometimes I don´t need to use the PRE with my beverages, very > good RX there.! > > 73, > Jorge > CX6VM/CW5W > > -Mensaje original- > De: guyk...@gmail.com [mailto:guyk...@gmail.com] En nombre de Guy Olinger > K2AV > Enviado el: Martes, 14 de Diciembre de 2010 01:34 p.m. > Para: Jorge Diez - CX6VM > CC: w...@w5ov.com; John_N1JM; elecraft@mailman.qth.net > Asunto: Re: [Elecraft] K3 in ARRL10 > > Hi Jorge, > > If you are listening to weak signals on 10m with a K3, the PRE should > be on. It's really required unless your local 10m ambient noise is > terrible. > > The FT1000MP built in this change in sensitivity, so it always had > additional sensitivity automatically turned on for 10 meters. This > could be turned off in the menu. > > In the K3, the operator makes these choices, it's not automatic. In > general, the PRE should always be on for 10m. By contrast on 160m, > the ATT should be on and the PRE off, unless you are listening to a > beverage or other low level RX antenna. But these settings are left > entirely to the operator. > > Those who have a high-end external preamp for ten meters (particularly > remote pre-amps) will want the K3 internal preamp off. That is one of > the number of reasons why it is left to the operator to determine the > proper setting of PRE/ATT to match the ambient noise at the ANT jack. > > Once the proper setting for your circumstance is determined, the K3 > will remember it so you don't have to adjust it constantly. > > 73, Guy. > > On Tue, Dec 14, 2010 at 5:53 AM, Jorge Diez - CX6VM > wrote: >> Hello, >> >> Sorry for the delay, but I was in a 6 hours drive trip yesterday. >> >> After reading the emails, I stopped at AC7AC email. I am very sure that >> I >> have band noise. I heard a noticeable SH that I didn´t heard > in >> the TS850. I can do some records later this week when I go back to the >> station. >> >> My setup is a ArraySolution sixpack, so I switch the 10 mts position to > the >> K3 and TS850. The radios are connected to different models of amps and > swr >> meters, but I don´t know if this will affect. >> >> I didn´t use the PRE. >> >> 73, >> Jorge >> CX6VM/CW5W >> >> >> >> -Mensaje original- >> De: elecraft-boun...@mailman.qth.net >> [mailto:elecraft-boun...@mailman.qth.net] En nombre de w...@w5ov.com >> Enviado el: Lunes, 13 de Diciembre de 2010 04:03 p.m. >> Para: John_N1JM >> CC: elecraft@mailman.qth.net >> Asunto: Re: [Elecraft] K3 in ARRL10 >> >> I operated the 10m contest this weekend with my K3 and I did have the >> preamp on. In that condition, I heard a lot more than apparently could >> hear me. >> >> If this could be quantified some way, perhaps we could get away from >> just >> comparing opinions? >> >> de W5OV >> >>> >>> Even though I do get a rise in band noise going from dummy load to >>> antenna, I >>> still hear weak signals on my 480 that I don't hear on the K3 on 10 > meters >>> SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up >>> properly, >>> I would hate to crank up the IF gain just for 10 meters. >>> -- >>> View this message in context: >>> http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html >>> Sent from the Elecraft mailing list archive at Nabble.com. >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.ne
Re: [Elecraft] K3 in ARRL10
Listening to 10m on a K3 with PRE off definitely would give the appearance of "insensitivity" if compared to a RX that switched its preamp on with a band change, or had the extra sensitivity switched in. Just one more reason that science grade RX comparisons are difficult and require established protocols to do it right. 73, Guy. On Tue, Dec 14, 2010 at 10:52 AM, Jorge Diez - CX6VM wrote: > Hi Guy, > > Thanks for the suggestion. > > Will try 10 mts with the PRE next time I go to the station. Unfortunately I > didn´t tried it during the contest. > > On low bands sometimes I don´t need to use the PRE with my beverages, very > good RX there.! > > 73, > Jorge > CX6VM/CW5W > > -Mensaje original- > De: guyk...@gmail.com [mailto:guyk...@gmail.com] En nombre de Guy Olinger > K2AV > Enviado el: Martes, 14 de Diciembre de 2010 01:34 p.m. > Para: Jorge Diez - CX6VM > CC: w...@w5ov.com; John_N1JM; elecraft@mailman.qth.net > Asunto: Re: [Elecraft] K3 in ARRL10 > > Hi Jorge, > > If you are listening to weak signals on 10m with a K3, the PRE should > be on. It's really required unless your local 10m ambient noise is > terrible. > > The FT1000MP built in this change in sensitivity, so it always had > additional sensitivity automatically turned on for 10 meters. This > could be turned off in the menu. > > In the K3, the operator makes these choices, it's not automatic. In > general, the PRE should always be on for 10m. By contrast on 160m, > the ATT should be on and the PRE off, unless you are listening to a > beverage or other low level RX antenna. But these settings are left > entirely to the operator. > > Those who have a high-end external preamp for ten meters (particularly > remote pre-amps) will want the K3 internal preamp off. That is one of > the number of reasons why it is left to the operator to determine the > proper setting of PRE/ATT to match the ambient noise at the ANT jack. > > Once the proper setting for your circumstance is determined, the K3 > will remember it so you don't have to adjust it constantly. > > 73, Guy. > > On Tue, Dec 14, 2010 at 5:53 AM, Jorge Diez - CX6VM > wrote: >> Hello, >> >> Sorry for the delay, but I was in a 6 hours drive trip yesterday. >> >> After reading the emails, I stopped at AC7AC email. I am very sure that I >> have band noise. I heard a noticeable SH that I didn´t heard > in >> the TS850. I can do some records later this week when I go back to the >> station. >> >> My setup is a ArraySolution sixpack, so I switch the 10 mts position to > the >> K3 and TS850. The radios are connected to different models of amps and > swr >> meters, but I don´t know if this will affect. >> >> I didn´t use the PRE. >> >> 73, >> Jorge >> CX6VM/CW5W >> >> >> >> -Mensaje original- >> De: elecraft-boun...@mailman.qth.net >> [mailto:elecraft-boun...@mailman.qth.net] En nombre de w...@w5ov.com >> Enviado el: Lunes, 13 de Diciembre de 2010 04:03 p.m. >> Para: John_N1JM >> CC: elecraft@mailman.qth.net >> Asunto: Re: [Elecraft] K3 in ARRL10 >> >> I operated the 10m contest this weekend with my K3 and I did have the >> preamp on. In that condition, I heard a lot more than apparently could >> hear me. >> >> If this could be quantified some way, perhaps we could get away from just >> comparing opinions? >> >> de W5OV >> >>> >>> Even though I do get a rise in band noise going from dummy load to >>> antenna, I >>> still hear weak signals on my 480 that I don't hear on the K3 on 10 > meters >>> SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up >>> properly, >>> I would hate to crank up the IF gain just for 10 meters. >>> -- >>> View this message in context: >>> http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html >>> Sent from the Elecraft mailing list archive at Nabble.com. >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> 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
Re: [Elecraft] K3 in ARRL10
To be compared with K3 with PRE OFF, the TS-850 must be with AIP set to ON 73 de Guido, ik2bcp 2010/12/14 Jorge Diez - CX6VM : > Hi Guy, > > Thanks for the suggestion. > > Will try 10 mts with the PRE next time I go to the station. Unfortunately I > didn´t tried it during the contest. > > On low bands sometimes I don´t need to use the PRE with my beverages, very > good RX there.! > > 73, > Jorge > CX6VM/CW5W > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Jorge, The K3 has outstanding dynamic range even with the preamp on. 73, Wayne N6KR Jorge Diez - CX6VM wrote: > Hi Guy, > > Thanks for the suggestion. > > Will try 10 mts with the PRE next time I go to the station. > Unfortunately I > didn´t tried it during the contest. > > On low bands sometimes I don´t need to use the PRE with my > beverages, very > good RX there.! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Hi Guy, Thanks for the suggestion. Will try 10 mts with the PRE next time I go to the station. Unfortunately I didn´t tried it during the contest. On low bands sometimes I don´t need to use the PRE with my beverages, very good RX there.! 73, Jorge CX6VM/CW5W -Mensaje original- De: guyk...@gmail.com [mailto:guyk...@gmail.com] En nombre de Guy Olinger K2AV Enviado el: Martes, 14 de Diciembre de 2010 01:34 p.m. Para: Jorge Diez - CX6VM CC: w...@w5ov.com; John_N1JM; elecraft@mailman.qth.net Asunto: Re: [Elecraft] K3 in ARRL10 Hi Jorge, If you are listening to weak signals on 10m with a K3, the PRE should be on. It's really required unless your local 10m ambient noise is terrible. The FT1000MP built in this change in sensitivity, so it always had additional sensitivity automatically turned on for 10 meters. This could be turned off in the menu. In the K3, the operator makes these choices, it's not automatic. In general, the PRE should always be on for 10m. By contrast on 160m, the ATT should be on and the PRE off, unless you are listening to a beverage or other low level RX antenna. But these settings are left entirely to the operator. Those who have a high-end external preamp for ten meters (particularly remote pre-amps) will want the K3 internal preamp off. That is one of the number of reasons why it is left to the operator to determine the proper setting of PRE/ATT to match the ambient noise at the ANT jack. Once the proper setting for your circumstance is determined, the K3 will remember it so you don't have to adjust it constantly. 73, Guy. On Tue, Dec 14, 2010 at 5:53 AM, Jorge Diez - CX6VM wrote: > Hello, > > Sorry for the delay, but I was in a 6 hours drive trip yesterday. > > After reading the emails, I stopped at AC7AC email. I am very sure that I > have band noise. I heard a noticeable SH that I didn´t heard in > the TS850. I can do some records later this week when I go back to the > station. > > My setup is a ArraySolution sixpack, so I switch the 10 mts position to the > K3 and TS850. The radios are connected to different models of amps and swr > meters, but I don´t know if this will affect. > > I didn´t use the PRE. > > 73, > Jorge > CX6VM/CW5W > > > > -Mensaje original- > De: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] En nombre de w...@w5ov.com > Enviado el: Lunes, 13 de Diciembre de 2010 04:03 p.m. > Para: John_N1JM > CC: elecraft@mailman.qth.net > Asunto: Re: [Elecraft] K3 in ARRL10 > > I operated the 10m contest this weekend with my K3 and I did have the > preamp on. In that condition, I heard a lot more than apparently could > hear me. > > If this could be quantified some way, perhaps we could get away from just > comparing opinions? > > de W5OV > >> >> Even though I do get a rise in band noise going from dummy load to >> antenna, I >> still hear weak signals on my 480 that I don't hear on the K3 on 10 meters >> SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up >> properly, >> I would hate to crank up the IF gain just for 10 meters. >> -- >> View this message in context: >> http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html >> Sent from the Elecraft mailing list archive at Nabble.com. >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Hi Jorge, If you are listening to weak signals on 10m with a K3, the PRE should be on. It's really required unless your local 10m ambient noise is terrible. The FT1000MP built in this change in sensitivity, so it always had additional sensitivity automatically turned on for 10 meters. This could be turned off in the menu. In the K3, the operator makes these choices, it's not automatic. In general, the PRE should always be on for 10m. By contrast on 160m, the ATT should be on and the PRE off, unless you are listening to a beverage or other low level RX antenna. But these settings are left entirely to the operator. Those who have a high-end external preamp for ten meters (particularly remote pre-amps) will want the K3 internal preamp off. That is one of the number of reasons why it is left to the operator to determine the proper setting of PRE/ATT to match the ambient noise at the ANT jack. Once the proper setting for your circumstance is determined, the K3 will remember it so you don't have to adjust it constantly. 73, Guy. On Tue, Dec 14, 2010 at 5:53 AM, Jorge Diez - CX6VM wrote: > Hello, > > Sorry for the delay, but I was in a 6 hours drive trip yesterday. > > After reading the emails, I stopped at AC7AC email. I am very sure that I > have band noise. I heard a noticeable SH that I didn´t heard in > the TS850. I can do some records later this week when I go back to the > station. > > My setup is a ArraySolution sixpack, so I switch the 10 mts position to the > K3 and TS850. The radios are connected to different models of amps and swr > meters, but I don´t know if this will affect. > > I didn´t use the PRE. > > 73, > Jorge > CX6VM/CW5W > > > > -Mensaje original- > De: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] En nombre de w...@w5ov.com > Enviado el: Lunes, 13 de Diciembre de 2010 04:03 p.m. > Para: John_N1JM > CC: elecraft@mailman.qth.net > Asunto: Re: [Elecraft] K3 in ARRL10 > > I operated the 10m contest this weekend with my K3 and I did have the > preamp on. In that condition, I heard a lot more than apparently could > hear me. > > If this could be quantified some way, perhaps we could get away from just > comparing opinions? > > de W5OV > >> >> Even though I do get a rise in band noise going from dummy load to >> antenna, I >> still hear weak signals on my 480 that I don't hear on the K3 on 10 meters >> SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up >> properly, >> I would hate to crank up the IF gain just for 10 meters. >> -- >> View this message in context: >> http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html >> Sent from the Elecraft mailing list archive at Nabble.com. >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Hello, Sorry for the delay, but I was in a 6 hours drive trip yesterday. After reading the emails, I stopped at AC7AC email. I am very sure that I have band noise. I heard a noticeable SH that I didn´t heard in the TS850. I can do some records later this week when I go back to the station. My setup is a ArraySolution sixpack, so I switch the 10 mts position to the K3 and TS850. The radios are connected to different models of amps and swr meters, but I don´t know if this will affect. I didn´t use the PRE. 73, Jorge CX6VM/CW5W -Mensaje original- De: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] En nombre de w...@w5ov.com Enviado el: Lunes, 13 de Diciembre de 2010 04:03 p.m. Para: John_N1JM CC: elecraft@mailman.qth.net Asunto: Re: [Elecraft] K3 in ARRL10 I operated the 10m contest this weekend with my K3 and I did have the preamp on. In that condition, I heard a lot more than apparently could hear me. If this could be quantified some way, perhaps we could get away from just comparing opinions? de W5OV > > Even though I do get a rise in band noise going from dummy load to > antenna, I > still hear weak signals on my 480 that I don't hear on the K3 on 10 meters > SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up > properly, > I would hate to crank up the IF gain just for 10 meters. > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
I operated the 10m contest this weekend with my K3 and I did have the preamp on. In that condition, I heard a lot more than apparently could hear me. If this could be quantified some way, perhaps we could get away from just comparing opinions? de W5OV > > Even though I do get a rise in band noise going from dummy load to > antenna, I > still hear weak signals on my 480 that I don't hear on the K3 on 10 meters > SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up > properly, > I would hate to crank up the IF gain just for 10 meters. > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Interesting, Barry. Tnx for the feedback. 73, Ron AC7AC -Original Message- Ron D'Eau Claire wrote: > > If these reports are correct, then additional I.F. gain isn't the answer. > In the past, I resorted to going into CONFIG FLx Gain and dialing it up and that helped a lot. IF Gain WAS the answer for me. However, I understand that some folks are resorting to external preamps for 10M. 73, Barry N1EU -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
And Barry reports that additional I.F. gain does help him on some signals, at least. Your reports suggest that something in the receiver chain is degrading the S/N ratio at lower signal levels. If the degradation is in the second I.F. then additional first I.F. gain would help. I've never seen that before, but I am an "analog" guy not familiar with the characteristics of the DSP system used in the second I.F. Ron AC7AC P.S. CW is just SSB with a *very* narrow bandwidth, Hi! -Original Message- Even though I do get a rise in band noise going from dummy load to antenna, I still hear weak signals on my 480 that I don't hear on the K3 on 10 meters SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up properly, I would hate to crank up the IF gain just for 10 meters. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Even though I do get a rise in band noise going from dummy load to antenna, I still hear weak signals on my 480 that I don't hear on the K3 on 10 meters SSB. Not sure about cw (what's cw?) :-). Assuming my K3 is set up properly, I would hate to crank up the IF gain just for 10 meters. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831388.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Comments in-line. --- On Mon, 12/13/10, Ron D'Eau Claire wrote: > If these reports are correct, then > additional I.F. gain isn't the answer. If > weak signals aren't being heard, it's because the > signal/noise (S/N) ratio > isn't as good on 10 as it is with the comparison rig. True. > If so, something's wrong with the K3 in question. True, maybe all of them. Mine is deaf too. My TS-870 isn't. Wes N7WS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Ron D'Eau Claire wrote: > > If these reports are correct, then additional I.F. gain isn't the answer. > In the past, I resorted to going into CONFIG FLx Gain and dialing it up and that helped a lot. IF Gain WAS the answer for me. However, I understand that some folks are resorting to external preamps for 10M. 73, Barry N1EU -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831185.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
If these reports are correct, then additional I.F. gain isn't the answer. If weak signals aren't being heard, it's because the signal/noise (S/N) ratio isn't as good on 10 as it is with the comparison rig. If so, something's wrong with the K3 in question. It's simple to check a K3 for adequate S/N. If the background noise increases appreciably (3 dB or so) when the antenna is connected, using the same bandwidth, the K3 has all the S/N it can use. The rise in noise clearly indicates that the ability to hear weak signals is entirely limited by the band noise. If not, turn the K3 preamp on. The preamp is a low-noise amplifier that improves the S/N. As mentioned often before, it is a bad idea to use the preamp on bands where the above test shows it is not needed because it amplifies *all* signals coming into the K3. That means the K3's dynamic range (ability to handle big signals without creating artifacts) is reduced when the preamp is used. That reduction in dynamic range is often never noticed, but if a really strong signal is present on the band it might produce undesirable "trash" on the frequency of the desired signal. Because the band noise on 10 meters and frequencies down to 20 meters is so low, the preamp is typically used with any antenna on those bands unless the local noise level is unusually high. Also, the preamp might be used on the lower frequency bands when a very low-gain antenna, such as a mobile whip, is used in a r.f. quiet location. Ron AC7AC -Original Message- This seems to come up every year after the ARRL 10M contest. Perhaps an extra 10dB of i.f. gain on 10M could be programmed into dsp firmware. 73, Barry N1EU Jorge Diez - CX6VM wrote: > > We heard two or three very weak signals from PY in the TS850 that were not > heard in the K3.. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
This seems to come up every year after the ARRL 10M contest. Perhaps an extra 10dB of i.f. gain on 10M could be programmed into dsp firmware. 73, Barry N1EU Jorge Diez - CX6VM wrote: > > We heard two or three very weak signals from PY in the TS850 that were not > heard in the K3.. > -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831068.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in ARRL10
Noticed that here, too, in Arizona using a TS-480. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-in-ARRL10-tp5830988p5831027.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 in ARRL10
Hello, well, I read some emails here about K3 performance in 10 mts band but really I never tested it carefully. We started ARRL10 with the K3, very poor condx in the morning, good in the afternoon. Second day in the morning we didn´t heard any signal in 10 mts. Some of the guest operators told me to listen in my TS850, the radio we used in the last 2-3 years that we did the ARRL10 from El Mangrullo. We heard two or three very weak signals from PY in the TS850 that were not heard in the K3..!, I didn´t want to assume that, I said for myself "NOooo", after spending +$4.000.- on my fully K3 for contests!.. So I hope it´s all about that I don´t know how to use the K3. It has a lot of features that really I do not understand so I think (and hope) I am not doing a correct use of the K3. Any suggestions are very well apreciated. 73, Jorge CX6VM/CW5W __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
