We could offer a KXPA30 amplifier to deal with the need for more power in a much smaller size. But not anytime soon....
73, Wayne N6KR On Jun 6, 2011, at 8:10 AM, juergen wrote: > > Hi Dave > > The point you make about the added complexity is valid. > > However from a communications effectiveness point of 20 watts is a > much more realistic power level, especially for SSB QSO's. Most of > the Mil Manpacks use this output power level. > > I operate portable using mil HF manpacks with the power varying > between 20 and 30 watts. I also have a SGC2020. 95% of the time on > the first call I can get through and have the standard cookie > cutter qso's and move on. If you try and do the same with 10 watts > its very frustrating and much more of a struggle. These are NA Q's > not local stuff. 5 to 10 watts is good power level for CW. For SSB > 20 watts is far more effective, even with simple whips. Everyone > will say its only 3db, however that 3db makes a huge difference when > using simple antennas especially on SSB. > > While the AMP might be the answer, looking at the projected images > and size, it will be a huge hassle carrying another box around. If > you consider the size of Yaesu FT857, which runs a full 100 watts of > output and its design is very neatly integrated into a tiny > package, the KX3 with an external amplifier will be awkward by > comparison. > > A FT857 with some AA batteries was carried to the top of Mount > Kilimanjaro by HB9BXE. The operator successfully had many qso at 20 > watts of output. He probably would not have packed a KX3 and > amplifier if it was available then. > > I dont see why a duplicate of the KX3's PA could mot be offered as > a piggy back box with another set of 8 batteries. I would rather > follow that option than the 100 watt linear option. It certainly > would be a lot smaller and portable than the 100 watt PA. I am sure > many homebrewers will explore this option. > > Anyway time will tell. There is always the hombrew/modification > option. The KX3 has a lot of potential and the design is 98% there. > > 73 > John > > --- On Mon, 6/6/11, Dave KQ3T <[email protected]> wrote: > >> From: Dave KQ3T <[email protected]> >> Subject: Re: [Elecraft] KX3 vs. K3 and other rigs? >> To: [email protected] >> Date: Monday, June 6, 2011, 6:40 AM >> Here are a couple of additional >> factors to consider. >> >> 1. Increasing the output power to 20 or 30 watts would have >> an impact on >> either the weight of the KX3 (more batteries needed to >> maintain a >> desired battery life) or the battery life (the existing >> batteries would >> not last as long at the higher power level). >> >> 2. It is much easier to add an external power amplifier, if >> desired, >> than to significantly improve receiver performance at a >> later date. >> >> 73, >> Dave, KQ3T >> >> On 6/6/2011 12:25 AM, juergen wrote: >>> Hi Kristinn >>> >>> What i dont get is why people expect so much >> performance from a >>> so called portable rig. A rig designed for portable >> operation generally uses poor antennas and is optimized for >> weight, size and battery life. >>> >>> While its nice having great receiver specifications, >> you do have to be realistic about the real world >> requirements that is placed on the receiver when operating >> portable. >>> >>> For me battery life, convenience and power output are >> very important requirements rather than world beating >> receiver specifications. >>> I would gladly have 30 watts output over >> ultimate receiver performance. Most military manpacks run 20 >> to 30 watts for good reasons. >>> >>> 10 watts and a wire in the tree type of operation does >> not demand a receiver with 100db of IMD dynamic >> range. >>> >>> If the KX3 does deliver incredible receiver >> performance for a bargain price I wont say NO, however I can >> live with lesser receiver performance when operating with >> marginal antennas. >>> >>> What I would prefer to see is an antenna tuner that >> will tune a 9 to 13 ft whip on all bands, or alternatively a >> end fed wire on all bands. A low noise figure receiver >> is important when using short portable antennas. >>> >>> We all waiting for the KX3 tech specs with >> baited breath. Time will tell whether we will get a 10,000 >> dollar contest radio that fits into the palm of your hand! >> After all my years of operating, I have yet to have my DC >> receiver overload on 40 meters when operating portable with >> full size low dipoles. >>> >>> 73 >>> John >>> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> 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:[email protected] > > 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
