Farhan recommends 100ma for the push-pull IRF510's on the uBitx.
More is better, you get into a more linear region of the FET.
But more means more power getting sucked from the battery if portable,
that power gets dissipated as heat in the FET's.
I'm going with 100ma.
With a 500ma quiescent drain current when using a 24v supply, each FET is dissipating 24*0.5 = 12 Watts.
That's a lot of heat.
Back of to 100ma and it is only 24*0.1 = 2.4 Watts.
Which still seems plenty.
You want to be very careful when adjusting those IRF510 gate bias trim-pots,
take it too far and those IRF510's might be trying to dump 100 Watts or so.
Jerry
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On Thu, Feb 1, 2018 at 08:56 am, M Garza wrote:
I was looking at this schematic:
It showed different current levels for the bias.
?
