Re: gEDA-user: OFF: capacitors for RF power amplifier

[Uwe Bonnes <bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

>>>>> "Kovacs" == Kovacs Levente <leventelist@xxxxxxxxx> writes:

    Kovacs> I'm currently designing a power amplifier for the HF (3-30MHz)
    Kovacs> radio band.

    Kovacs> I am selecting capacitors for the low pass harmonic filter bank
    Kovacs> at the output.  My question is what kind of capacitors should I
    Kovacs> use? I apply not more then 100V of say 30MHz maximum.

    Kovacs> My best bet is to use X7R capacitors with as much DC voltage
    Kovacs> rating as I can get. I don't know if there's any connection
    Kovacs> between the DC and AC losses.


What value do you need? Try NP0/COG type, even if substantial more
expensive. I guess the X ceramic will introduce more harmonics than it will
filter out...
-- 
Uwe Bonnes                bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------


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