Thanks Andy.
I need more
time to get my head around that equation. I'm still struggling
with a near vertical learning curve on all of this. I never
worked with ferrite (except in RFI suppression) until very
recently. To start with I don't know what figure to use for N turns
on this 16:1 transformer with 4 x 10 turn windings. There must
be beginner level articles somewhere that walk one through this
stuff, but I haven't yet found them.
For that
matter I'm not sure how to calculate Vrms on something that
isn't a sine wave.
All I can say
at the moment is the core is a EPCOS / TDK B64290L674X830
N30 material
with a ui of 4300, 36 x 23 x 15 mm.
I'm still
interested in understanding the issues with this PA as a
learning exercise but am preparing to move on to something else
for on air use.
Paul N1BUG
On 01/07/2018 12:34 PM, Andy Talbot
wrote:
What core ?
What dimensions ?
Does it obey the fundamental equation for saturation in a
core ?
Vrms = 4.44 .F . N . A . B
F Hz, N turns, A core area area in m^2 B Tesla
Keep B < 0.1 and ferrite saturation should be fine
And if it is saturating, you need more turns, not less
Andy G4JNT