[Elecraft] K2 Power meter

[Tom Campie]

Like I said before, the requested power is nowhere near the power read  
by the tuner when tuned to a non-50 ohm load. But I am certain of the  
calibration of the tuner meter and when it says it is putting out 5  
watts, the current draw is about 1.75 amps as I have confirmed with  
other K2 owners to be the draw at 5 watts.

There's some weirdness going on somewhere, that is for sure.

Tom

On Jul 19, 2009, at 11:12 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> Tom,
>
> That is exactly what I said.  In CALP, if the load is anything other  
> than 50+j0, the power indication will be incorrect.  In other words,  
> the requested power may not equal the actual power.
>
> When you go to AUTO and do a TUNE, the forward power should be close  
> to the requested power.
>
> 73,
> Don W3FPR
>
> Tom Campie wrote:
>> I calibrated the tuner to a 50 ohm load on CALP.  With the tuner  
>> tuned  to a non-50 Ohm load, the requested power does not match the  
>> output  power by any definition of the word.
>>
>> Tom
>>
>> On Jul 19, 2009, at 9:48 PM, Don Wilhelm wrote:
>>
>>
>>> Tom,
>>>
>>> No adjustment is required.  In CALP state, the tuner must be  
>>> working  into a 50 ohm load for accurate power readings.  If you  
>>> are  connected to an antenna that has a feedpoint impedance other  
>>> than  50+j0 impedance, you can expect "unexpected" results.
>>> When you change the ATU menu to Auto and do a TUNE, the tuner has   
>>> done its job of providing a 50 ohm match to the K2 and the power  
>>> out  will be as requested.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> Tom Campie wrote:
>>>
>>>> This has been beaten over and over I think but I haven't found    
>>>> anything on it yet:
>>>>
>>>> I just got back from the lab at work and used a very well   
>>>> calibrated  power meter to calibrate my KAT2 power meter.  Now  
>>>> on  40m at home, I  set my power control to 5w and tuner to  
>>>> Pout.  The  tuner now reads  2.9w.  Not until I tune the  
>>>> requested power to 8  watts or so does the  tuner say I'm putting  
>>>> out 5 watts.  Isn't  there a way to adjust it so  that the  
>>>> requested power matches the  tuner output power so that the S/  
>>>> Power meter reads the right  value?  That's the most annoying  
>>>> part...
>>>>
>>>> Tom
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Elecraft at mailman.qth.net
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> --- 
>>>> --- 
>>>> ------------------------------------------------------------------
>>>>
>>>>
>>>> No virus found in this incoming message.
>>>> Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database:  270.13.20/2248 
>>>>  - Release Date: 07/19/09 05:57:00
>>>>
>>>>
>>>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> --- 
>> ---------------------------------------------------------------------
>>
>>
>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: 270.13.20/2248 
>>  - Release Date: 07/19/09 05:57:00
>>
>>