Re: [Amps] LDMOS MRF186 100W UHF amp from a kit. Need help finding tuning resources.

[Lukasz <sp4it.mail@gmail.com>]

I've been trying to simulate the 930MHz circuit from the datasheet as a
starting basis and I had to increase the trimmer by 5pf - otherwise numbers
don't work.. Then it seems to work? Can someone tell if this is correct or
not?
https://ibb.co/DgrFS77z
https://ibb.co/h1shgvYj

Also, with some help of (hopefully not hallucinating) AI I've managed to
establish the input likely has 1.3nH of parasitic inductance in addition to
177pF of gate capacity (this gives the 2.5+7j at 945MHz) and these values
calculated at 440MHz give 2.5+1.55j. Not sure how far I'll get with that.

73, Lukasz


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