I agree that TX IMD is an important parameter. In my experience (measuring a
sample of two, my K3 and K3S) regrettably, there is no one number to be
published. IMD varies with Vcc (or Vdd), output power, load Z and most
interesting, frequency. In a K3(S)/100 case, there is another wrinkle, there
are two PAs, LPA and HPA and those numbers vary as well.
If you want to cherry-pick data, you can get pretty much any answer you want.
Wes N7WS
On 6/8/2019 3:08 PM, Bob McGraw K4TAX wrote:
Yes, yes, and yes. One can download the Receiver Test Report and import it
into an EXCEL file. That will then allow one to sort on 1 or 2 or 3 or more
different criteria.
The 2 kHz Narrow Spaced number, to me, is not as important as some other
numbers. It is nice to have a radio, K3S, that falls in the upper position
of the list, but I suggest one look at "OTHER NUMBERS".
I do wish he would post transmit IMD numbers. You might surprised at the
radios that are clean and the radios that are.......well not so clean.
73
Bob, K4TAX
On 6/8/2019 1:13 PM, Wes wrote:
Rob doesn't use Elecraft equipment so I'm not sure whether he reads this list
of not. I do know that he has repeatedly said that any radio in the top 10
or more on his list would suit almost any user. He also tries to implore
people to NOT judge a radio purely on the sort order of the presented data.
Many other factors are important too: ergonomics and reliability are prime
concerns for me.
Even though my personal radio (loaned to Rob for testing) is near the top of
the sorted list, based on my criteria it would be nowhere close to equipment
I've owned before. YMMV
Wes N7WS
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