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

To: <[email protected]>
Subject: Re: LF: Iron dust toroids and heating/H bridge
From: "Graham" <[email protected]>
Date: Tue, 30 May 2017 14:04:24 +0100
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80w  Exciter more  like  )

Ive found, what is a 500 watt , 500KHz power module , the design was to minimise transformer geometry, which uses discrete logic, to fabricate the H drive requirements , there seam's to be sufficient information available , to question the choice of a half bridge , over that of the full version? ,
Its tempting to link the harmonic content , with the high loss rate of
devices , In your 136 vk experiments, with the H , did you loose fets
, other than by loss of tune ?
Is there a  ferrite , that  is  comfortable  in 136  and  477 service ?

In terms of compact driver 'devices' yes, are about, but, may be the additional functions are of little use in this application .. but worth consideration for a driver, having no transformer , effectively all band from audio up ? , the on-frequency aspect is compelling ..

From: "DK7FC" <[email protected]>
Sent: Monday, May 29, 2017 2:53 PM
To: <[email protected]>
Subject: Re: LF: Iron dust toroids and heating/H bridge

80 watt, yes that's a good driver.

Am 29.05.2017 15:45, schrieb Graham:
More of a power block, that would run on 136/477 with little modification,
just one  out put device and  filter  needed , low harmonic power levels
probably  help ..

with a dedicated driver 'ic' , possible, fet's would have a longer life span, ) may be power level control as well .. the on frequency aspect is useful
Found a  80 watt  500 Khz   inverter with H ic drive

Or just wind a  transformer ..

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