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sBITX V3 PA BIAS 2x IRFZ24N

 

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Hello ...
?
anybody knows what is the correct PA BIAS ??? PA is with 2x IRFZ24N .
( ? Volts at the Gate ; Current – ma -? increase when push PTT without Mic-Audio)
?
73 , Jens / HB9JOI
?
 

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I think the original suggestion was 0.250 for the current through the MOSFETs. ?I think I said some of mine at 0.360 amps.?




On Mar 26, 2024, at 13:15, Jens <hb9joi@...> wrote:

?
Hello ...
?
anybody knows what is the correct PA BIAS ??? PA is with 2x IRFZ24N .
( ? Volts at the Gate ; Current – ma -? increase when push PTT without Mic-Audio)
?
73 , Jens / HB9JOI
?
 

Hello Jens,

Gordon is correct.? The original DE and V2 bias were to be set at 250ma.? Here is the link to the archive of that directive:


There is other information on that site.? It is worth a read-through.
 

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... many thanks to all .
?
73 , Jens / HB9JOI
?
?

From: Evan Hand
Sent: Tuesday, March 26, 2024 8:00 PM
Subject: Re: [BITX20] sBITX V3 PA BIAS 2x IRFZ24N
?
Hello Jens,

Gordon is correct.? The original DE and V2 bias were to be set at 250ma.? Here is the link to the archive of that directive:


There is other information on that site.? It is worth a read-through.

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