Um, 51dB (the fractions are imaginary) is not all
that good even at 1 kW. It's better than what you can buy today,
for the most part. But. it's not very good when 60 dB to 70 dB is
available and achievable.
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On 20220225 10:15:01, Conrad, PA5Y
I did say at 0dBm! Clearly. It is not my fault that you have
PS fan boy eyes.
On Fri, Feb 25, 2022 at 08:16 AM, Conrad,
Look here at figure 3a, this is a Class A
RF amplifier with no pre-distortion running at 2W per tone.
The IM3 is -51.48dBc, this is at 950 MHz.
Good grief! This entire topic of your claims of wildly
spectacular IMD3 numbers for your K3S and 890S has nothing to
do with tiny amounts of power at 950 MHZ! The radios we're
discussing (and the 7300 and the ANANs) operate at HF, not
And we've always been talking clearly in terms of final PA
stage IMD3 levels, not some measurements taken at a
Show me the measured IMD3 from your K3S or 890S at the output of the PA finals
at any power level over 5 watts, at any frequency the
finals are designed to
operate at, and show me it's anywhere near -50dB. Go ahead,