Ud 2.7c

[Laras]

Hey bro, First of all, I apologize if my English is messy, I'm here asking for your experience, input, suggestions, I'm building UD2.7, driver. My problem is, if I connect GDT the VPP signal decreases, like it draws a lot of power, I tested it with feedback input using a 450khz signal generator (and that's my primary work plan)[/img]

[Laras]

oscilloscope probe measurement point at jp driver output to gdt

[davekni]

Output to GDT looks a bit too rounded (slow final part of rise and fall times) even with no GDT.  There may be some circuit issue within UD2.7 build.  Plot with GDT could be related to that issue, but more likely is a GDT problem, wound on the wrong type of core.  Needs to be ferrite, not powdered iron.  Search the forum for GDT winding and core requirements.

[Laras]

Output to GDT looks a bit too rounded (slow final part of rise and fall times) even with no GDT.  There may be some circuit issue within UD2.7 build.  Plot with GDT could be related to that issue, but more likely is a GDT problem, wound on the wrong type of core.  Needs to be ferrite, not powdered iron.  Search the forum for GDT winding and core requirements.

Thank you sir for your response, yes sir, I have a problem with my UD circuit, it's still a problem, because gdt when I apply it to the 1.3b driver, the output signal is fine, but I'm also investigating what's going on, but haven't found the problem yet.