Seen that somewhere before....Cool Avatar
Peppenino, I had a similar question during my build. As the First Watt F3 schematic lacks a gate snubber, as does the Zv9 schematics once feedback and the Aleph CCS were introduced, and as a LU1014D mounted direct to the PCB would lack a snubber, I chose not to use one. However I believe at least some other F3 builders using XRK's adapter board do include a gate snubber of 100R. I have no idea what effect if any that would make, as I have no way to measure for oscillation.No, I refer to gate snubber on adapter pcb. Do measurements should be done without load at output like for Aleph? Thanks
That, ZM. MeasurementsNo, I refer to gate snubber on adapter pcb. Do measurements should be done without load at output like for Aleph? Thanks
my F3 is taking shape
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Hi8/26 Update
Powered up the right channel board yesterday and all went well. I will make a couple small updates to the boards (correct a silk screen mistake and add 2nd resistor location for R5 to make it easier to parallel resistors to create the desired resistance to match a particular Q1). Due to a lack of time on my part and a lack of general interest I will not be making the second power supply board option for this group buy. Please update your desired quantities by 8/29 and I will place the order on 8/30.
Was the 2nd resistor location to fine tune R5 implemented ?
I looked briefly at my PCBs and couldn’t see it. If it’s not there I will unsolder R5 and temporarily replace it with a 5-10W pot until I find the precise value based on Q1.
Thanks
Eric
Sorry, for the immensely late response, I needed a break after the group buy wrapped up. I tried to add a second resistor location for R5 and decided that it was not worth the effort to rework the board. For my build I used the potentiometer to determine the required value, and soldered together a set of resistors and placed the set in the R5 location.Hi
Was the 2nd resistor location to fine tune R5 implemented ?
I looked briefly at my PCBs and couldn’t see it. If it’s not there I will unsolder R5 and temporarily replace it with a 5-10W pot until I find the precise value based on Q1.
Thanks
Eric
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