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Re: QMX: Filter issues [solved]


 

Hi John & Evan,

Am 15.01.24 um 22:00 schrieb Stefan U. Hegner:
If the above checks, test that Q508 is turned on while receiving.? The source and drain should be close to zero volts.
Not so sure on this one: Drain 0.64V, Source 0.07V, Gate 0.69V - no matter what band I select. - Is this maybe the suspect? Strange, as there was no re-soldering in that vicinity.

But my interpretation would be a fried Q508 ... so change one BSS123 MOSFET.
Replaced my Q508 and now all the sweeps look good to me. - I think I maybe post them later for reference.

Thanks a lot for you help, that is appreciated.

Vy73

Stefan.


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Stefan U. Hegner <db4st@...>
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