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Re: Output stages voltage for reference


 

? ? Thanks Raj but I can not adjust the 50 mA at rest, something is wrong yes!
? ? Jorge

2017-01-04 13:47 GMT-02:00 Raj vu2zap@... [BITX20] <BITX20@...>:

?

Jorge,

This is normal. As the final IRF warms up the current increases. Do not worry!

At 04-01-2017, you wrote:

?

?? ?? Hello Raj, my BITX20 V3 Linear is consuming 155mA I think a lot, what will be happening? Maybe the auto FET flickering?
?? ?? ? Jorge PY2PVT _._

2017-01-04 10:11 GMT-02:00 Raj vu2zap@... [BITX20] <BITX20@... >:
??

For anyone trouble shooting the final stages.

Measured these voltages without any modulation

Power supply exact 12V, PTT pressed/shorted

Predriver Q13 drawing 30mA
C=11.6
B=3.66
E=3.0

Driver Q14 drawing 41mA
C=11.85
B=1.0
E=0.415

Final Q15 drawing 150mA
C=12
G=4V
E=0




--
?? 73 de Jorge PY2PVT
?? Campinas SP
?? GG67MD




--
? 73 de Jorge PY2PVT
? Campinas SP
? GG67MD

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