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1. Re: VLF: Class E PA (score: 1): Author: DK1IS <[email protected]>; Date: Sun, 14 Oct 2018 00:16:45 +0200; Hello group, Just to close this thread: Concerning the problem of the first drive pulse with DC power already on: Bob, W1XP, made an important contribution in a private mail. He pointed out that the; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-10/msg00109.html (9,815 bytes)
2. Re: VLF: Class E PA (score: 1): Author: DK7FC <[email protected]>; Date: Sun, 14 Oct 2018 10:30:20 +0200; Hi Tom, Good luck with your PA. Tell us the component values when you're finished, as well as the actual efficiency. From my LF PA i remember the coil, which was quite large already ('air-cored'). Re; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-10/msg00110.html (10,896 bytes)
3. Re: VLF: Class E PA (score: 1): Author: Chris Wilson <[email protected]>; Date: Sun, 14 Oct 2018 10:00:26 +0100; Hello DK7FC, The biggest voltage and current spikes in my W1VD Class d amp are when a WSPR or OPERA transmission ceases, from back EMF I presume. I am curious as tvo whether a "soft voltage start" ci; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-10/msg00111.html (12,188 bytes)
4. Re: VLF: Class E PA (score: 1): Author: DK7FC <[email protected]>; Date: Sun, 14 Oct 2018 11:35:28 +0200; Hi Chris, Can you exclude that this is a driver issue? Because then it is a different story. If the PA is hard keyed, always with a proper waveform (pulsewidth), then i expect no problems. For the pr; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-10/msg00113.html (13,467 bytes)

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