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Re: the cause for the spurs, found!


 

Right now the 45MHz amp has a gain of about 17dB at 45Mhz and is 3.3dB down at 90Mhz.

Total current draw in my proto build is 32mA.?? With? 3.1mA ? in the 1st emitter follower and 13.3mA? in the 2nd.

Maybe a high P1dB MMIC could be used to replace that section at the cost of current draw, Tx only.

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