Re: [Elecraft] K3 as WSPR transmitter
Dear OMs and YLS, Wht not just run 100mW to a Watt? Surely then there is no heating problem. I ask because I am starting the process of using WSPR on my K3. 73 Doug EI2CNSent from my Samsung Galaxy smartphone. Original message From: Bill Frantz Date: 05/01/2020 22:12 (GMT+00:00) To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 as WSPR transmitter I have run FT8, PSK31, and RTTY a lot on my K3. Even before I installed the 100W amp card. I have never had any problem with the low power amplifier (LPA) with those modes. I have also run those modes at 100W with the KPA3 with no problems. I don't think you'll have any problems with the 110.6 second WSPR transmit sequence.73 Bill AE6JVOn 1/5/20 at 4:54 PM, pfizenma...@q.com (HP) wrote:>I see the lore is that the LPA does not care for long key down >periods - I was toying with using my K3 as WSPR tx on 160 and >80 fpor some antenna evaluations. .>The lore would say its not a good idea ?>The manual is not clear to me of whether in fact there is a 160 >low level out I could use for a home brew external amp -The >KIO3 transverter bands show 160 coded -but other tables talk >about just IF of 7 mhz and above.>BUT its all moot of the LPA is still biased on and limited in key down time ?---Bill Frantz | Re IOT: "How many access control systems does it takewww.pwpconsult.com | to change a light bulb?" - Dean Tribble__Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:elecr...@mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to turnb...@net1.ie __ 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] K3 as WSPR transmitter
I've run my K3 at 5 watts on WSPR, at up to 20% tx percentage, for a week at a time. However, the case will get quite warm unless I run a 12v low-speed fan pointed at the right side of the case. I'll leave it to the engineers as to whether this is necessary, but having the case stay stone-cold makes me feel better. Fans are available from Amazon and everywhere else. 73 Eric WD6DBM On Sun, Jan 5, 2020, 1:54 PM HP wrote: > I see the lore is that the LPA does not care for long key down periods - > I was toying with using my K3 as WSPR tx on 160 and 80 fpor some antenna > evaluations. . > > The lore would say its not a good idea > __ 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] K3 as WSPR transmitter
I have run FT8, PSK31, and RTTY a lot on my K3. Even before I installed the 100W amp card. I have never had any problem with the low power amplifier (LPA) with those modes. I have also run those modes at 100W with the KPA3 with no problems. I don't think you'll have any problems with the 110.6 second WSPR transmit sequence. 73 Bill AE6JV On 1/5/20 at 4:54 PM, pfizenma...@q.com (HP) wrote: I see the lore is that the LPA does not care for long key down periods - I was toying with using my K3 as WSPR tx on 160 and 80 fpor some antenna evaluations. . The lore would say its not a good idea ? The manual is not clear to me of whether in fact there is a 160 low level out I could use for a home brew external amp -The KIO3 transverter bands show 160 coded -but other tables talk about just IF of 7 mhz and above. BUT its all moot of the LPA is still biased on and limited in key down time ? --- Bill Frantz| Re IOT: "How many access control systems does it take www.pwpconsult.com | to change a light bulb?" - Dean Tribble __ 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] K3 as WSPR transmitter
Same here, I have run 2 and 5 watts using WSPR, works great with my K3. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 1/5/20 2:05 PM, Tony Estep wrote: On Sun, Jan 5, 2020 at 3:55 PM HP wrote: I see the lore is that the LPA does not care for long key down periods... === I often transmitted on WSPR with my K3. A long keydown can't hurt anything when you're only running 2 watts. Tony KT0NY __ 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 d...@nk7z.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
Re: [Elecraft] K3 as WSPR transmitter
On Sun, Jan 5, 2020 at 3:55 PM HP wrote: > I see the lore is that the LPA does not care for long key down periods... > === I often transmitted on WSPR with my K3. A long keydown can't hurt anything when you're only running 2 watts. Tony KT0NY __ 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] K3 as WSPR transmitter
Hi Hank, While intuitively it would seem that WSPR is a viable method for performing antenna evaluations, extreme short term variability of the ionosphere makes it into a heroic task... The only viable method I've found -- and it works very well -- is to install a reference antenna within about 1/2 wavelength of the antenna under test, it MUST have the same polarization as the antenna under test and ideally -- to avoid interactions -- neither antenna should "look through" the other. In almost every case -- unless you have local RFI issues -- evaluations performed using your receiver produce nearly identical results as using your transmitter. 73 Frank W3LPL - Original Message - From: "HP" To: elecraft@mailman.qth.net Sent: Sunday, January 5, 2020 9:54:28 PM Subject: [Elecraft] K3 as WSPR transmitter I see the lore is that the LPA does not care for long key down periods - I was toying with using my K3 as WSPR tx on 160 and 80 fpor some antenna evaluations. . The lore would say its not a good idea ? The manual is not clear to me of whether in fact there is a 160 low level out I could use for a home brew external amp -The KIO3 transverter bands show 160 coded -but other tables talk about just IF of 7 mhz and above. BUT its all moot of the LPA is still biased on and limited in key down time ? Hank K7HP __ 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 donov...@starpower.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] K3 as WSPR transmitter
I see the lore is that the LPA does not care for long key down periods - I was toying with using my K3 as WSPR tx on 160 and 80 fpor some antenna evaluations. . The lore would say its not a good idea ? The manual is not clear to me of whether in fact there is a 160 low level out I could use for a home brew external amp -The KIO3 transverter bands show 160 coded -but other tables talk about just IF of 7 mhz and above. BUT its all moot of the LPA is still biased on and limited in key down time ? Hank K7HP __ 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
