[Elecraft] [K3] f/w 2.73/1.98 power calibration

[Gregory Fischer]

With DataA you need to adjust the LineIn gain so that you have 4 bars  
of ALC action.

73
Greg

On Dec 14, 2008, at 6:06 PM, Bob Cunnings wrote:

> Have you tried adjusting TXG VCE? With latest firmware, a setting of
> -2dB puts my PSK31 power right where it belongs for a given requested
> power out. There's then no need to ride the audio input level, which
> is a bad idea given the way the K3 ALC works.
>
> Bob NW8L
>
> On Sun, Dec 14, 2008 at 11:44 AM, Richard Ferch <ve3iay at storm.ca>  
> wrote:
>> Steve Ward said:
>>
>>> I just applied the latest beta firmware as I have done many times
>>> before, and it looks like this time my power calibration went out  
>>> the
>>> window.  I'm putting out about 70w on PSK31 when I dialed in 45.
>>>
>>> Just wanted to give folks a heads-up to watch their power output  
>>> when
>>> they start operating under new firmware, it might be time to re- 
>>> calibrate!
>>
>> It's more than just the power calibration. Even after calibrating  
>> power and
>> setting the requested power below 50W, with either 2.73/1.98 or  
>> 2.72/1.98
>> the power output on PSK31 (in DATA A) mode often exceeds the  
>> requested
>> power, which results in splatter. I have been having to constantly  
>> ride the
>> LINE IN and/or sound card output level controls in this weekend's PSK
>> contest to keep the power below 50W and PSK signal quality  
>> acceptable; I
>> have now switched back to 2.67/1.96 for the remainder of the contest.
>>
>> 73,
>> Rich VE3KI
>> K3 #1595
>>
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