Re: [Elecraft] K3S Enable Preamp 2 Without Preamp 1
I have recently been using the 6m ARR GaAsFET Preamp ahead of my K3S. I also find that it has lower noise and perhaps more gain. The proof is that I have been able to work moonrise/moonset EME with it (no elevation on my antenna). John WA1EAZ > On Apr 6, 2018, at 11:16 PM, Jim Brown wrote: > > On 4/6/2018 5:58 PM, j...@kk9a.com wrote: >> I have operated from several countries using my K3S and I am never so >> fortunate to have a noise floor low enough use preamp 2. Most of the time >> preamp 1 is also off. > > I've had the opposite experience. MDS of the original K3 was woefully poor > above 15M, even with the preamp switched in. As luck would have it, I have a > very nice ARR GAsFET 6M preamp on the shelf that I'd used in Chicago that I > inserted at the RX antenna patch point; I found that it improved the MDS all > the way down to 12M. I would have missed a LOT of QSOs without that preamp. > Of course, like everyone else, sometimes my noise level is lower than at > other times, and a solar system 500 ft from my main antenna raises it by 10 > dB on 10 and 6 when the sun is hitting it. > > When the K3S was introduced, I quickly replaced the Synth boards and the > Transverter board to get that improved preamp, simplifying my RX antenna > switching. I do find, though, that the GAsFET preamp has a slightly lower NF, > so I continue to use it during the 6M season. > > 73, Jim K9YC > > __ > 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 > Message delivered to jstengrev...@comcast.net __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K3S Enable Preamp 2 Without Preamp 1
I have never used my K3S higher than 10m. I imagine that 6m (or 2m like the original poster is using) is a different animal than HF and the higher gain preamp would be useful. John KK9A Jim Brown K9YC wrote: > I have operated from several countries using my K3S and I am never so > fortunate to have a noise floor low enough use preamp 2. Most of the time > preamp 1 is also off. I've had the opposite experience. MDS of the original K3 was woefully poor above 15M, even with the preamp switched in. As luck would have it, I have a very nice ARR GAsFET 6M preamp on the shelf that I'd used in Chicago that I inserted at the RX antenna patch point; I found that it improved the MDS all the way down to 12M. I would have missed a LOT of QSOs without that preamp. Of course, like everyone else, sometimes my noise level is lower than at other times, and a solar system 500 ft from my main antenna raises it by 10 dB on 10 and 6 when the sun is hitting it. When the K3S was introduced, I quickly replaced the Synth boards and the Transverter board to get that improved preamp, simplifying my RX antenna switching. I do find, though, that the GAsFET preamp has a slightly lower NF, so I continue to use it during the 6M season. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3S Enable Preamp 2 Without Preamp 1
On 4/6/2018 5:58 PM, j...@kk9a.com wrote: I have operated from several countries using my K3S and I am never so fortunate to have a noise floor low enough use preamp 2. Most of the time preamp 1 is also off. I've had the opposite experience. MDS of the original K3 was woefully poor above 15M, even with the preamp switched in. As luck would have it, I have a very nice ARR GAsFET 6M preamp on the shelf that I'd used in Chicago that I inserted at the RX antenna patch point; I found that it improved the MDS all the way down to 12M. I would have missed a LOT of QSOs without that preamp. Of course, like everyone else, sometimes my noise level is lower than at other times, and a solar system 500 ft from my main antenna raises it by 10 dB on 10 and 6 when the sun is hitting it. When the K3S was introduced, I quickly replaced the Synth boards and the Transverter board to get that improved preamp, simplifying my RX antenna switching. I do find, though, that the GAsFET preamp has a slightly lower NF, so I continue to use it during the 6M season. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3S Enable Preamp 2 Without Preamp 1
Preamp 2 can be used only on 17 m - 6 m and the main and sub 10 db preamps must be off. You are not allowed to have more than 20 db preamplification. Cheers, Fred KE7X From: elecraft-boun...@mailman.qth.net on behalf of John Stengrevics Sent: Friday, April 6, 2018 7:04 PM To: j...@kk9a.com Cc: Elecraft Reflector Subject: Re: [Elecraft] K3S Enable Preamp 2 Without Preamp 1 Hi John, I operate mostly 6 & 2 meters. On 6m, I have a third preamp between the K3S and the amp. When operating EME, I have to disable Preamp 2 because 3 preamps create too much noise. So, I have disabled Preamp 2. This has allowed me to work EME successfully. I wanted to try an experiment, disabling Preamp 1 and enabling Preamp 2 while using my 3rd preamp. From what I understand, enabling Preamp 2 disables Preamp 1. But, I don’t know this for sure. Let me know your thoughts on this. Thanks & 73, John WA1EAZ > On Apr 6, 2018, at 8:58 PM, wrote: > > I am curious what the reason would be for this? > > I have operated from several countries using my K3S and I am never so > fortunate to have a noise floor low enough use preamp 2. Most of the time > preamp 1 is also off. > > John KK9A (PJ4R in 2018 WPX SSB) > > > Stengrevics Jstengrevics wrote: > > Is there some way to enable preamp 2 without enabling preamp 1? Perhaps > electing attenuation on preamp 1? > > 73, > > John > WA1EAZ > > __ > 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 > Message delivered to jstengrev...@comcast.net __ 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 Message delivered to fc...@montana.edu __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3S Enable Preamp 2 Without Preamp 1
Hi John, I operate mostly 6 & 2 meters. On 6m, I have a third preamp between the K3S and the amp. When operating EME, I have to disable Preamp 2 because 3 preamps create too much noise. So, I have disabled Preamp 2. This has allowed me to work EME successfully. I wanted to try an experiment, disabling Preamp 1 and enabling Preamp 2 while using my 3rd preamp. From what I understand, enabling Preamp 2 disables Preamp 1. But, I don’t know this for sure. Let me know your thoughts on this. Thanks & 73, John WA1EAZ > On Apr 6, 2018, at 8:58 PM, wrote: > > I am curious what the reason would be for this? > > I have operated from several countries using my K3S and I am never so > fortunate to have a noise floor low enough use preamp 2. Most of the time > preamp 1 is also off. > > John KK9A (PJ4R in 2018 WPX SSB) > > > Stengrevics Jstengrevics wrote: > > Is there some way to enable preamp 2 without enabling preamp 1? Perhaps > electing attenuation on preamp 1? > > 73, > > John > WA1EAZ > > __ > 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 > Message delivered to jstengrev...@comcast.net __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K3S Enable Preamp 2 Without Preamp 1
I am curious what the reason would be for this? I have operated from several countries using my K3S and I am never so fortunate to have a noise floor low enough use preamp 2. Most of the time preamp 1 is also off. John KK9A (PJ4R in 2018 WPX SSB) Stengrevics Jstengrevics wrote: Is there some way to enable preamp 2 without enabling preamp 1? Perhaps electing attenuation on preamp 1? 73, John WA1EAZ __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K3S Enable Preamp 2 Without Preamp 1
Is there some way to enable preamp 2 without enabling preamp 1? Perhaps electing attenuation on preamp 1? 73, John WA1EAZ -- Sent from: http://elecraft.365791.n2.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 Message delivered to arch...@mail-archive.com
