[Elecraft] KAT500 actual radiated power during tuning

[Don Wilhelm]

Erik,

I don't know the workings of the Icom tuner, but the KAT500 needs 20 
watts input to tune.  All of that goes to the antenna.

If part of that signal would be shunted to a dummy load, I don't think 
it would be tuned to the correct antenna impedance.
I would have to know more about the configuration involved, but to my 
mind, it sounds like a dummy load is being connected in parallel with 
the antenna which would upset the impedance to be matched.

73,
Don W3FPR

On 11/6/2017 6:37 PM, E T wrote:
> I understand the requirements, and the ICOM IC-7300 puts out 12.5W by 
> default (can be adjusted via service menus).  I'm looking for a 
> definitive answer as to the actual radiated power.  Like I said, the 
> ICOM AH-4 tuner specifies its actual radiated antenna power but the 
> KAT500 does not so that's why I'm asking.
>
>   Thanks and 73,
>   Erik Tkal  -  W1QED
>
> On Nov 6, 2017, at 6:29 PM, Don Wilhelm <donwilh at embarqmail.com 
> <mailto:donwilh at embarqmail.com>> wrote:
>
> Erik,
>
> The KAT500 relies on the transceiver power being reduced when tuning.
> I am not certain how (or if) that happens with an Icom transceiver, 
> but the KAT500 needs about 20 watts for reliable tuning.
> That can happen automatically with the K3/K3S/KPA500 combination, but 
> I don't know what the Icom can do to accommodate that same thing.
>
> 73,
> Don W3FPR
>
> On 11/6/2017 5:35 PM, E T wrote:
>> When tuning using a KAT500 from an ICOM via an AH-4 interface what is 
>> the actual radiated power out the antenna?  I was reading that ICOM's 
>> AH-4 tuner itself takes the input power and splits it into an 
>> internal dummy load and only radiates something like 300mW out the 
>> antenna, is the KAT500 comparable?
>>
>