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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+I\:\s+Fw\:\s+For\s+today\s+the\s+FETs\s+survived\.\.\.\s*$/: 5 ]

Total 5 documents matching your query.

1. LF: Re: I: Fw: For today the FETs survived... (score: 1)
Author: Andy Talbot <>
Date: Sun, 28 May 2017 20:18:12 +0100
First thing I noticed is that your turns ratio on the output transformer doesn't look right.    You quote " ... with primary winding of 15 turns and secondary of 12 turns..." 180V DC in a half bridge
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00249.html (13,465 bytes)

2. Re: LF: Re: I: Fw: For today the FETs survived... (score: 1)
Author: Andy Talbot <>
Date: Mon, 29 May 2017 19:07:36 +0100
Yes. As you'll see in my original write up, I originally forgot that the peak of the fundamental sine component of a square wave is GREATER than the peak by a factor of 4 / pi and initially my PA del
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00271.html (16,094 bytes)

3. Re: LF: Re: I: Fw: For today the FETs survived... (score: 1)
Author: Andy Talbot <>
Date: Tue, 30 May 2017 22:50:13 +0100
I've just looked again at the circuit diagram you sent - on there the values are different from your statement in the email.  It shows primary 5 turns, secondary 12 turns so a load resistance in the
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00285.html (17,684 bytes)

4. LF: Re: I: Fw: For today the FETs survived... (score: 1)
Author: "Alan Melia" <>
Date: Fri, 2 Jun 2017 13:36:37 +0100
Hi Marco I dont know where you are putting the caps but I am assuming they are passing a high RF corrent. I found that the old style (valve) high voltage caps in my Class E test rig changed capacitan
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-06/msg00009.html (28,279 bytes)

5. Re: LF: Re: I: Fw: For today the FETs survived... (score: 1)
Author: "Alan Melia" <>
Date: Fri, 2 Jun 2017 14:58:36 +0100
Hi Marco, I may well be wrong I was experimenting with 150W at 35V I measured 12 to 15A through the capacitors (from memory) .......the confirmation is that the change is permanent. I dont remember s
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-06/msg00013.html (29,622 bytes)


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