[Elecraft] TX IMD

[Jan Erik Holm]

Yes of course, "however" this cable is supplied by Elecraft
and is part of the "high performance" kit.
My own PS has a 0.06V drop RX > TX and that is good enough!

/ SM2EKM
-----------
Alan Bloom wrote:
> One factor that affects IMD is power supply voltage variation under
> load.  The standard PS cable that comes with the K3 drops several tenths
> of a volt at max power.  Add that to power supply regulation and
> internal voltage drop in the K.
> 
> On my unit, the voltage reading on the K3 display goes from 13.5V to
> 12.4V when I press the key on CW.  (100W, 14 MHz)  I could easily see
> that being the limiting factor in transmit IMD performance on SSB.
> 
> Al N1AL
> 
> 
> On Mon, 2009-01-26 at 10:19, Julian, G4ILO wrote:
>> Gregory Fischer wrote:
>>> Not doubting your TX IMD report in PSK.  But I typically see ~-32dB IMD
>>> when 
>>> checking PSK at 50W. 
>>>
>> You are probably right to doubt it. Such a difference made me try a test
>> again, on a different band. I got a different set of results. Probably it is
>> better to use a dummy load when testing the TX. The IMD Meter is designed to
>> be used off-air (hence when TXing into an antenna) but it would appear that
>> other factors can affect the readings. This needs further investigation.
>>
>> -----
>> Julian, G4ILO. K2 #392  K3 #222.
>> http://www.g4ilo.com/ G4ILO's Shack   http://www.ham-directory.com/ Ham
>> Directory    http://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
> 
>