@@Headbutter-Lettuce90 It was the basic 811a vttc schematic from Steve Ward, I just changed some of the values of the capacitors and grid leak resistor to work well with the higher freq of the small coil. The concept is exactly the same, I just tuned it as well as possible
@@Headbutter-Lettuce90 Yes, all of the components values were determined by trial and error. I tried different values of components, primary windings, feedback windings and topload until I achieved the longest sparks and the least plate dissipation possible.
Hi, are you still around in VTTC things?
Yes, I haven't build one in a long time but I still have a gu-81m and some other tubes
@@triggerhappy77707 I was interested in your mini 811A VTTC
@@Headbutter-Lettuce90 It was the basic 811a vttc schematic from Steve Ward, I just changed some of the values of the capacitors and grid leak resistor to work well with the higher freq of the small coil. The concept is exactly the same, I just tuned it as well as possible
@@triggerhappy77707 but you made the grid leak just by trial and error?
@@Headbutter-Lettuce90 Yes, all of the components values were determined by trial and error. I tried different values of components, primary windings, feedback windings and topload until I achieved the longest sparks and the least plate dissipation possible.