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General => General Discussion => Topic started by: Aurgus on December 06, 2011, 01:35:30 am
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I could use some help with the PLL circuit.
Pin 3 (COMP_IN) of the 4046 looks like it goes to a .35 cap then to the emitter of the 2N2222.
See actached jpg.
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Looks like pin 3 of the 4046 is simply connected to the 0.35nf cap and then to ground. Where did you get the schematic?
On the VIC card, pin 3 would be connected or through divide by n 4017 chips to pin 4 (VCOout) of the 4046.
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That is part of the beast of a schematic I have been working on for a long time deciphering the PLL resonant driver of Stan’s.
Now that the high res photo’s have been released (many thank you’s to Dan) I have made better progress. Evidently the divided by’s were not used, along with several other mods. In the past I have rushed out the gerber files to get boards to work with, only to end up cutting traces and adding jumpers. Trying not to repeat that as much.
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BTW:
The 100K pot is marked Gating.
It is now corrected to "Range".
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The WFC VIC in general discussions has a great deal of info...It's spread out over 80 pages but Don and TonyW both contribute a great deal there as far as the circuit goes....
Page 61 shows a schematic of the 4046 and VIC connections by TonyW. Pin 3 of the 4046 actually connects to a 22K resistor and the neg side of the primary coil.
http://www.ionizationx.com/index.php?topic=1513.300
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Thanks HMS-776
I somehow missed all that.
Must stop working on this so late at night.
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No Problem, that's what were all here for!
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for your clarification
HM