http://elecraft.85.s1.nabble.com/KX3-vs-K3-and-other-rigs-tp6443819p6445562.html
in a much smaller size. But not anytime soon....
>
> 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 <
[hidden email]> wrote:
>
>> From: Dave KQ3T <
[hidden email]>
>> Subject: Re: [Elecraft] KX3 vs. K3 and other rigs?
>> To:
[hidden email]
>> 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
>>>
>>
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