Most hi power FET s I have used need around 10V in class D or E amps
I.e. driver sq wave V
Dr. Chip Tc 4426 or equivalent
G3KEV
> On 1 Jan 2018, at 12:07, Clemens Paul <[email protected]> wrote:
>
> Thanks Clemens, I'd need two, correct? Could I try say 4 to 16 turns
> on two FT-37-43 cores, which I have?
A turns ratio of 4:16 gives a 1:4 voltage ratio so this ratio would require
only one core.
One could make one 1:4 (V) transformer or two cascaded 1:2 (V) ones,
the latter probably being more feasible.
But 4 turns for the primary on a FT37-43 give 4µH which is only 3.4 Ohms on
137kHz.
This would probably eat up all the "ooomph" of the driver chip by the
magnetizing current.
I would suggest at least 500µH which is 430 Ohms on 137kHz.
So you'd have to choose a different material,e.g. "J".
With two cascaded FT 37-J's this would require 15 turns for the primary and 30
for the secondary
which appears just manageable.
A bigger core would make things easier,though.
Then you could use one core with 15:60 turns.
73
Clemens
DL4RAJ
ill the Si synthesizer chip have
> enough "ooomph" to drive them?
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Chris Wilson
> Sent: Monday, January 1, 2018 12:26 PM
> To: Clemens Paul
> Cc: [email protected]
> Subject: Re: LF: RE: RE: Si5351A syntehsiser able to fire a
> FET driver chip directly??
>
>
>
> Hello Clemens,
>
> Monday, January 1, 2018, 11:10:44 AM, you wrote:
>
>>> How about a 1:4 transformer? ->Voltage ratio!
>
>
> Thanks Clemens, I'd need two, correct? Could I try say 4 to 16 turns
> on two FT-37-43 cores, which I have? Will the Si synthesizer chip have
> enough "ooomph" to drive them?
>
>
>
>
> --
> Best regards,
> Chris mailto:[email protected]
>
>
>
> ---
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