Hi Chris,
I would not recommend the one you selected because it has an unnecessary
large inner diameter and a lower height, thus a lower AL value.
I think this is the same one that i recommended from Bürklin:
https://www.mouser.co.uk/ProductDetail/EPCOS-TDK/B64290A0699X830?qs=sGAEpiMZZMs2JV%252BnT%2FvX8Df1W1GtRs010YpcsJh6dvk%3D
It is also cheaper.
There are other materials available, such as T65, T38, T37, offering a
higher AL value. Maybe these are even more suitable at that sort of
frequency but i didn't spend too much time to select the best core for
each frequency. I use the N30 material from 1 kHz to MF at high power (
> 1 kW for one core) without problems. So this is what i recommend. It
will work.
73, Stefan
PS: If you want to bridge one of Paul's 2x 7.2 kW amps, you may need two
of them ;-)
PPS: You may want to build two orthogonal ground loops then, one per
channel. With SpecLab you can then drive each channel separately and so
you can build a software rotatable loop by aligning the phase between
the channels, while staying into the shack when its cold and/or rainy :-)
Am 09.05.2019 14:42, schrieb Chris Wilson:
Hello Stefan,
I am now on to building a matching transformer but it seems Buerklin
have a minimum order of 60 units! I have found this bigger core at
Mouser, could I use that instead please?
https://www.mouser.co.uk/ProductDetail/EPCOS-TDK/B64290L0730X830?qs=4l9S5vBWkUJtsO6ZFRCS4g%3D%3D
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