Re: LF: Iron dust toroids and heating/H bridge

[DK7FC <selberdenken@posteo.de>]

Hello G,

Am 26.05.2017 23:21, schrieb Graham:
> The  H bridge seems a interesting  design,  one  point , the  amp  is 
> on frequency ,   F in = F out ?
Yes, there is no divider stage in this design.
> Composite driver  IC's  are available  for  the  H configuration,
>
> Have  you looked at these ? ?,
As far as i know the ones which are cheap and available in small amounts 
are not suitable for 137 kHz and such power levels.
> would  seem to  simplify  construction , to a  single  out put  
> transformer , whilst producing  less  harmonic power ... ?
A single housing will concentrate the dissipated power on one spot which 
is a disadvantage. I prefer the normal TO-247 components...
73, Stefan
> Tnx -G,
> G0NBD