Hi Don,
Thanks for that.
I was not referring specifically to the Elecraft XV series of transverters, as
I have plans to rebuild my home built transverter for 144 MHz. So this was a
general comment for those who want to use external transverters with their KX3,
as I imagine quite a few may do given the high performance of the radio in such
a small package.
Some thought had gone in to supporting transverters by Elecraft with XV offset
and XV H power limit and other very useful parameters that can be set, however
having to use a large drive power of 4 watts and then attenuate it to a few mW
for the transverter mixer is against the QRP principles, and for high duty
cycle modes like JT65 is a non starter given the undersized heatsink on the
KX3.
One small change in the KX3 firmware to automatically put the ATU mode into
BYPASS MODE when an XV is selected would solve this potential problem
elegantly. Pretty please!
73
David Anderson GM4JJJ
> On 5 Jan 2014, at 03:55, Don Wilhelm wrote:
>
> Dave,
>
> If you are referring to he Elecraft XV series transverters, then I suggest
> that you set up the transverter to use 4 watts input. That is a level that
> is quite controllable and the attenuator in the XV transverter will handle it
> with no problems. ATU Tune will behave as expected and no harm will come to
> the transverter.
>
> If you are using something other than the Elecraft XV series, then your
> comments are valid.
>
> 73,
> Don W3FPR
>
>> On 1/4/2014 6:36 PM, David Anderson wrote:
>> Dear Elecraft,
>>
>> I am planning to use my KX3 with an external transverter. The KX3 has only
>> the single main antenna socket, and it is important that I do not
>> accidentally transmit too high a power into the transverter's input
>> attenuator and mixer. Normally I would want a very low power level.
>>
>> I can set the maximum power when using a transverter using the XV H in the
>> KX3 menu, this is very useful, however I believe that the ATU TUNE button
>> will still try and tune at approx 3 watts even though I set a lower maximum
>> power of say 0.1 watts in XV H.
>>
>> I thought perhaps that when an XV was selected in the BAND that the ATU TUNE
>> would be disabled, or the ATU always put in BYPASS mode but it is not.
>>
>> I know I can put the ATU in bypass mode, but I am bound to forget one day,
>> and accidentally press ATU TUNE and cause damage to my transverter.
>>
>> I guess I have a feature request, make sure that ATU TUNE button does not
>> transmit when a XV is selected (ATU in bypass mode) , it would also be nice
>> if the ATU mode was band specific.
>
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