[TCML] Gate drive transformer help

[Scott Bogard <sdbogard@xxxxxxxxx>]

Greetings all.
     Built my gate drive transformer for my flyback driver, oddly 
enough when scoping it it works great at higher frequencies (30+kHz) but 
distorts below that, except at low duty cycles.  So my questions is do I 
need a different core material, possibly a larger core, fewer turns?  I 
have one larger core, and also several smaller ones, the larger core is 
already wound but seems to only work at much higher frequencies in that 
configuration.  Also tried doubling and halving the dc blocking cap, 
didn't change much...  Any advice would be greatly welcomed.  Also the 
waveforms are a bit distorted even when they are stable, up until very 
high frequencies (100kHz ish) I still think I could use them this way 
but seems to me changing parameters should fix that as well, at least my 
my intended operating range of 10-100 kHz...  Thanks.

Scott Bogard.
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