[Elecraft] K2 Power meter

[Tom Campie]

I just realized something that may be throwing it off - I installed the
Elecraft 4:1 balun inside the rig and hard wired it to ANT 2 on the tuner
after I'd done the bridge null - is it possible that that has thrown off
that null and I am not actually getting a 50 ohm load to the front end?
I'll have to redo that tonight and report back.

Thanks for the help so far.

Tom

On Sun, 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
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>>>>
>>>
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