Re: [Elecraft] K3 144mhz power - 10 watts not a problem
Cascading IPs maybe if you're running an intermediate amp to drive the big one. Regards, Mike VP8NO - Original Message - From: Jim Miller KG0KP jimmil...@stl-online.net To: Elecraft Reflector elecraft@mailman.qth.net Sent: Sunday, May 17, 2009 12:33 AM Subject: Re: [Elecraft] K3 144mhz power - 10 watts not a problem |I don't see 10 watts as a problem. How many 2 meter amps do you have on the | shelf just waiting to be used again? 40 w 15 years old ($90 new then), two | converted police amps (ugly but they work well) both run over 85 watts | continuous with 5 watts in ($50) at hamfests if there any still around) and | a 140 w that takes 2 watts drive for full power and the other is a 160 w | that runs full output at 35 watts and over half of that from an ht (don't | remember exactly how much). 10 watts a problem? - i just don't see it. | | Lots of external amps out there. | 73, Jim KG0KP __ 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 144mhz power - 10 watts not a problem
Exactly. On 144 the weak signals are so weak that TX cleanness as well as RX dynamic range become a very difficult problems. You want a minimum number of TX stages to mess up the signal, and minimum phase noise. Most solid state amp's that might be available in the shack may not be clean enough to drive the big one. Hmmm years ago I was looking at a 144 legal limit amp project described in the 1988 ARRL Handbook. It uses a tetrode and produces full output with just 10W in. That one is now back on my list of dreams 73, Erik K7TV - Original Message - From: Mike Harris mike.har...@horizon.co.fk To: Elecraft Reflector elecraft@mailman.qth.net Sent: Sunday, May 17, 2009 8:26 AM Subject: Re: [Elecraft] K3 144mhz power - 10 watts not a problem Cascading IPs maybe if you're running an intermediate amp to drive the big one. Regards, Mike VP8NO - Original Message - From: Jim Miller KG0KP jimmil...@stl-online.net To: Elecraft Reflector elecraft@mailman.qth.net Sent: Sunday, May 17, 2009 12:33 AM Subject: Re: [Elecraft] K3 144mhz power - 10 watts not a problem |I don't see 10 watts as a problem. How many 2 meter amps do you have on the __ 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 144mhz power - 10 watts not a problem
I don't see 10 watts as a problem. How many 2 meter amps do you have on the shelf just waiting to be used again? 40 w 15 years old ($90 new then), two converted police amps (ugly but they work well) both run over 85 watts continuous with 5 watts in ($50) at hamfests if there any still around) and a 140 w that takes 2 watts drive for full power and the other is a 160 w that runs full output at 35 watts and over half of that from an ht (don't remember exactly how much). 10 watts a problem? - i just don't see it. Lots of external amps out there. 73, Jim KG0KP - Original Message - From: K3JPS k3jps@gmail.com To: David Ferrington, M0XDF m0...@alphadene.co.uk Cc: elecraft@mailman.qth.net Sent: Thursday, May 14, 2009 12:07 PM Subject: Re: [Elecraft] K3 144mhz power One could always purchase or build there own external 2m linear as an option. 73 de James On Thu, May 14, 2009 at 10:58 AM, David Ferrington, M0XDF m0...@alphadene.co.uk wrote: That's what it says - I doublt the KPA3 is designed to handle 2m and the module has it's own Ant. socket. -- In theory, there is no difference between theory and practice, but in practice there is. On 14 May 2009, at 15:55, Rick Braun wrote: Is the 144 mhz module limited to 10 watts, even in a K3/100? __ 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 144mhz power
That's what it says - I doublt the KPA3 is designed to handle 2m and the module has it's own Ant. socket. -- In theory, there is no difference between theory and practice, but in practice there is. On 14 May 2009, at 15:55, Rick Braun wrote: Is the 144 mhz module limited to 10 watts, even in a K3/100? __ 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 144mhz power
One could always purchase or build there own external 2m linear as an option. 73 de James On Thu, May 14, 2009 at 10:58 AM, David Ferrington, M0XDF m0...@alphadene.co.uk wrote: That's what it says - I doublt the KPA3 is designed to handle 2m and the module has it's own Ant. socket. -- In theory, there is no difference between theory and practice, but in practice there is. On 14 May 2009, at 15:55, Rick Braun wrote: Is the 144 mhz module limited to 10 watts, even in a K3/100? __ 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
