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TR-9 RF power amp and lowpass part
#1
I have a test setup comprised of an ADF7021 tied directly to a circuit shown below

[Image: E5KMytC.png]

The problem is that the power output is too low and the RF MOSFET gets hot pretty fast.
The frequency response of the lowpass part is far from being optimal. 2nd harmonic is at -10dBc. I have already proposed a change here: https://github.com/M17-Project/TR-9/issu...-727211097

Sources:
http://www.elenota.pl/datasheet-pdf/1613...448ed59464 (page 10)
https://www.nxp.com/docs/en/data-sheet/AFT05MS004N.pdf
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TR-9 RF power amp and lowpass part - by SP5WWP - 11-14-2020, 03:42 PM

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