One could always have a modular approach which is how other industries approach this. Broadband combiners are not that complicated. BTW, predistortion is common practice is a number of industries.
Sent from my iPad > On Nov 4, 2019, at 5:03 PM, Joe Subich, W4TV <[email protected]> wrote: > > On 2019-11-04 4:44 PM, Scott Manthe wrote: > > Elecraft's design philosophy dictates that their radio be capable of > > portable/field operation, so that's how they design their radios. > > They're lightweight, efficient, and operate off 12 volts. > > If that's the design philosophy, limit the power output to 60 W PEP. > > Elecraft already have *two* other 12V capable radios - the KX2 and KX3 - > of one doesn't count the K2. *WHY* create another dirty 12V radio > ("active predistortion" is not the solution) when one can have a clean > 60W radio at 12V or a clean 200W radio at 40V? > > Build a DC-DC supply for the 40V PA stage if one wants to run it from > an automobile electrical system (or install a separate 48V alternator, > regulator and battery specifically for the PA stage). > > Increasing transmit IMD by a factor of 40 just to operate the radio > at 100 W PEP on a 12 battery is unconscionable given today's state > of the art. It was different when 48V transistors/FETs were not > available but that ship sailed almost 20 years ago. > > 73, > > ... Joe, W4TV > > >> On 2019-11-04 4:44 PM, Scott Manthe wrote: >> Elecraft's design philosophy dictates that their radio be capable of >> portable/field operation, so that's how they design their radios. They're >> lightweight, efficient, and operate off 12 volts. Lots of other >> manufacturers love giant, heavy rigs. Elecraft doesn't. >> 73, >> Scott N9AA >>> On 11/4/19 3:52 PM, David Gilbert wrote: >>> >>> I agree completely with all of that, but with the discontinuance of the K3s >>> it seems that Elecraft doesn't really consider the K4 to be strictly a base >>> station rig. Their continued insistence upon everything being 12 volt >>> capable is a bit of a puzzlement for me. >>> >>> 73, >>> Dave AB7E >>> >>> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
