I was figuring we're best off looking hard at everything between the mike and that first mixer,
adding sufficient feedback in each amp such that we get consistent results.
Gain distribution needs attention, giving lower level signals going into the mixers, more gain in the power amp.
But sufficiently high Ft's in the 45mhz amp to get the same target gain each time we stamp one out.
Thanks for the Spectrum Analyzer notes, I'll go over that thoroughly.
Jerry
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On Sat, Aug 11, 2018 at 01:49 PM, ajparent1/KB1GMX wrote:
On Sat, Aug 11, 2018 at 12:56 PM, Jerry Gaffke wrote:
Yes, most of what I had in my last post was gleaned from your older posts.
I posted in response to Henning's warnng about using a better 45mhz transistor:
? ? "Using e.g. BFR106 instead could worsen the spur problem."
Yes, it improve the gain but we really don't need that as it just makes over drive worse.
