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Here is (what I think is) the reason for the two diodes... Lets say the varactors need 4v. Without the diodes, there would need to be 2150Ω to the right of the red line. The filter capacitor will take a lifetime to charge (in RF terms). With the 2.8v drop from those two double junction diodes, there only needs to be 645Ω on the right side of the red line. That gets you on frequency RIGHT NOW on TX, the FCC doesnt care if your receive is off for a split second because you wont even hear that.
[ATTACH=full]63008[/ATTACH]

[QUOTE="brandon7861, post: 812474, member: 53724"] Here is (what I think is) the reason for the two diodes... Lets say the varactors need 4v. Without the diodes, there would need to be 2150Ω to the right of the red line. The filter capacitor will take a lifetime to charge (in RF terms). With the 2.8v drop from those two double junction diodes, there only needs to be 645Ω on the right side of the red line. That gets you on frequency RIGHT NOW on TX, the FCC doesnt care if your receive is off for a split second because you wont even hear that. [ATTACH type="full" width="417px" alt="diodes.png"]63008[/ATTACH] [/QUOTE]

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