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Just be sure that the Finals Gate mA DRAW can be set.

IF you can't set it, then you simply have to check and repair the parts in the BIAS circuit preventing the Gate voltage from getting set right..

Zeners are finicky. But can and are, checked like any other Diode. Tested both ways of polarity to see if it's shorted, or blown open

The 5.6V types used are 1 Watt rated.

IF the "diode" failed, you can install any diode in there - just make sure the Banded side is to the LEFT (Towards GATE) - the purpose of the Zener is to prevent the GATE from blowing up from too much power from the DRIVER.

Keeping a Zener in there just prevents the Final from getting too much RF Input signal from the Driver.

Just when you do the TP test for "draw" - keep it lower - like around 55mA

I do not recommend 100mA - unless you install something at Cx located back by the Pre-Driver.

Why?

IF you don't - you may wind up having this problem again.

There are some threads about this...
https://www.worldwidedx.com/threads/rci-2995-dx-problem.254336/#post-717647
https://www.worldwidedx.com/threads/dx2547-power-supply-issues.234071/#post-639861
https://www.worldwidedx.com/threads/the-en369fn-mosfet-companion-cbtricks-errors-in-the-drawing-and-the-correction.157713/page-2#post-726275
https://www.worldwidedx.com/threads/galaxy-dx-2547-voltage-regulator.258183/#post-734543
https://www.worldwidedx.com/threads/connex-3300hp-power-output-problem.239565/#post-660891
https://www.worldwidedx.com/threads/ranger-2995-dxcf-swr-problems.261022/#post-754044
https://www.worldwidedx.com/threads/galaxy-dx959-mosfet-final-and-driver-bias-voltage.155425/page-3#post-656260

<blockquote data-quote="Handy Andy" data-source="post: 767033" data-attributes="member: 52309">Just be sure that the Finals Gate mA DRAW can be set.IF you can&#039;t set it, then you simply have to check and repair the parts in the BIAS circuit preventing the Gate voltage from getting set right..Zeners are finicky. But can and are, checked like any other Diode. Tested both ways of polarity to see if it&#039;s shorted, or blown open The 5.6V types used are 1 Watt rated.IF the &quot;diode&quot; failed, you can install any diode in there - just make sure the Banded side is to the LEFT (Towards GATE) - the purpose of the Zener is to prevent the GATE from blowing up from too much power from the DRIVER.Keeping a Zener in there just prevents the Final from getting too much RF Input signal from the Driver.Just when you do the TP test for &quot;draw&quot; - keep it lower - like around 55mAI do not recommend 100mA - unless you install something at Cx located back by the Pre-Driver.Why?IF you don&#039;t - you may wind up having this problem again.There are some threads about this...<a href="https://www.worldwidedx.com/threads/rci-2995-dx-problem.254336/#post-717647" target="_blank">https://www.worldwidedx.com/threads/rci-2995-dx-problem.254336/#post-717647</a><a href="https://www.worldwidedx.com/threads/dx2547-power-supply-issues.234071/#post-639861" target="_blank">https://www.worldwidedx.com/threads/dx2547-power-supply-issues.234071/#post-639861</a><a href="https://www.worldwidedx.com/threads/the-en369fn-mosfet-companion-cbtricks-errors-in-the-drawing-and-the-correction.157713/page-2#post-726275" target="_blank">https://www.worldwidedx.com/threads/the-en369fn-mosfet-companion-cbtricks-errors-in-the-drawing-and-the-correction.157713/page-2#post-726275</a><a href="https://www.worldwidedx.com/threads/galaxy-dx-2547-voltage-regulator.258183/#post-734543" target="_blank">https://www.worldwidedx.com/threads/galaxy-dx-2547-voltage-regulator.258183/#post-734543</a><a href="https://www.worldwidedx.com/threads/connex-3300hp-power-output-problem.239565/#post-660891" target="_blank">https://www.worldwidedx.com/threads/connex-3300hp-power-output-problem.239565/#post-660891</a><a href="https://www.worldwidedx.com/threads/ranger-2995-dxcf-swr-problems.261022/#post-754044" target="_blank">https://www.worldwidedx.com/threads/ranger-2995-dxcf-swr-problems.261022/#post-754044</a><a href="https://www.worldwidedx.com/threads/galaxy-dx959-mosfet-final-and-driver-bias-voltage.155425/page-3#post-656260" target="_blank">https://www.worldwidedx.com/threads/galaxy-dx959-mosfet-final-and-driver-bias-voltage.155425/page-3#post-656260</a></blockquote>

[QUOTE="Handy Andy, post: 767033, member: 52309"] Just be sure that the Finals Gate mA DRAW can be set. IF you can't set it, then you simply have to check and repair the parts in the BIAS circuit preventing the Gate voltage from getting set right.. Zeners are finicky. But can and are, checked like any other Diode. Tested both ways of polarity to see if it's shorted, or blown open The 5.6V types used are 1 Watt rated. IF the "diode" failed, you can install any diode in there - just make sure the Banded side is to the LEFT (Towards GATE) - the purpose of the Zener is to prevent the GATE from blowing up from too much power from the DRIVER. Keeping a Zener in there just prevents the Final from getting too much RF Input signal from the Driver. Just when you do the TP test for "draw" - keep it lower - like around 55mA I do not recommend 100mA - unless you install something at Cx located back by the Pre-Driver. Why? IF you don't - you may wind up having this problem again. There are some threads about this... [URL]https://www.worldwidedx.com/threads/rci-2995-dx-problem.254336/#post-717647[/URL] [URL]https://www.worldwidedx.com/threads/dx2547-power-supply-issues.234071/#post-639861[/URL] [URL]https://www.worldwidedx.com/threads/the-en369fn-mosfet-companion-cbtricks-errors-in-the-drawing-and-the-correction.157713/page-2#post-726275[/URL] [URL]https://www.worldwidedx.com/threads/galaxy-dx-2547-voltage-regulator.258183/#post-734543[/URL] [URL]https://www.worldwidedx.com/threads/connex-3300hp-power-output-problem.239565/#post-660891[/URL] [URL]https://www.worldwidedx.com/threads/ranger-2995-dxcf-swr-problems.261022/#post-754044[/URL] [URL]https://www.worldwidedx.com/threads/galaxy-dx959-mosfet-final-and-driver-bias-voltage.155425/page-3#post-656260[/URL] [/QUOTE]

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