[Amps] transformer distortion question

[Ron Youvan]

   Drax KB3X Felton wrote:

> I'm making a low power MOSFET amplifier for 475kHz with an IRF510.   It
> works fairly well and looks nice on the scope, but now I'm trying to
> transformer couple its output to a second stage.

> I made a center tapped,  bifiliar wound, toroid transformer out of 26
> turns of 22 ga. magnet wire on a 1" diameter core. This is so that I can
> split the phases to drive the second stage as a push-pull.

> When I look at the output of the right side of the output of the
> transformer it looks like a perfect sine wave.When I look at the left
> side's output the negative dip looks distorted.

> Will someone look at these photos of my oscilloscope and suggest what
> might be happening here?
> Why is it only on one side of my transformer, only on the negative dip?

   My guess is it's the load on one side for some reason, switch the
leads from the transformer and see if it moves.
-- 
   Ron  KA4INM - Youvan's corollary:
                 Every action results in unwanted side effects.