Re: Searching for IMD
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The article does mention the oip3 which is a measure of IMD. The crucial thing is bias current and feedback. The biasing method itself is irrelevant.
On Sat, 15 Sep 2018, 04:21 Glenn, <glennp@...> wrote:
Perhaps it's possible to improve the Bi-Amps? The article by Wes Hayward and Bob Kopski shows a slightly different biasing arrangement and feedback in the first stage compared to that used in uBITX. As shown, gain is 15dB and flat to 100MHz within 1dB.