17-12-2012, 01:53 PM
Here the small changes I did.
1.) I used -500V (instead of -600V) DC for the supressor grid circuit. This was the optimal value for max sweep length. Above this value it didn't oscillate.
2.) I used 47pF and 23.5pF for C11 (instead of 30pF). It worked fine with both values, but with 23.5 (two 47pF in series) the flyback sweep is more sharpen.
3.) I didn't used a potentiometer for RV47. Instead I used a resistive divider of the same value than the pot. I change the value ssevral times to simulate the movement of the pot, and I noticed no important changes in the trace length.
This weekend I got a sweep of 50uS. My most ambicious goal it to get a sweep of 10uS, but I'm very happy with my achievement till now.
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There is a mistake on post No.12 . I wrote RV47 instead of RV44. The correct pot to change the sweep frequency is RV44.
1.) I used -500V (instead of -600V) DC for the supressor grid circuit. This was the optimal value for max sweep length. Above this value it didn't oscillate.
2.) I used 47pF and 23.5pF for C11 (instead of 30pF). It worked fine with both values, but with 23.5 (two 47pF in series) the flyback sweep is more sharpen.
3.) I didn't used a potentiometer for RV47. Instead I used a resistive divider of the same value than the pot. I change the value ssevral times to simulate the movement of the pot, and I noticed no important changes in the trace length.
This weekend I got a sweep of 50uS. My most ambicious goal it to get a sweep of 10uS, but I'm very happy with my achievement till now.
****************************
There is a mistake on post No.12 . I wrote RV47 instead of RV44. The correct pot to change the sweep frequency is RV44.
