As stated earlier, a radio with internal power supply capable of 90V to
250V and run the PA devices from 48 to 60 volts for a 100 watt radios.
And for mobile or portable, a 12VDC to 120VAC converter, makes it a 12V
radio. I use a 1000 watt pure sinewave converter on our travel
trailer. The converter is about 1/2 the size of my P3 and cost about
$300. Thus not much more than the cost of a AC power supply and it is
CLEAN.
73
Bob, K4TAX
On 11/4/2019 4:02 PM, Joe Subich, W4TV 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: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 li...@subich.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 rmcg...@blomand.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
