Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+Current\s+mode\s+class\s+D\s+PA\s+for\s+475\s+kHz\s+\-\s+success\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+Current\s+mode\s+class\s+D\s+PA\s+for\s+475\s+kHz\s+\-\s+success\s*$/: 3 ]

Total 3 documents matching your query.

1. Re: LF: Re: Current mode class D PA for 475 kHz - success (score: 1): Author: <[email protected]>; Date: Thu, 31 May 2012 14:27:24 -0400; Stefan Well ... guess you have already answered your own question ;~) I've stuck with transformer coupled designs ... VMCD for 137 / 500 kHz and CMCD for 160 / 75 / 40 meters. I don't have much exper; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00028.html (14,881 bytes)
2. Re: LF: Re: Current mode class D PA for 475 kHz - success (score: 1): Author: Stefan Schäfer <[email protected]>; Date: Thu, 31 May 2012 18:37:02 +0200; Jay, MF, I just tried the CMCD and immediately achieved 89% efficiency at 12VDC and 36W RF at 475 kHz (dummy load). Just a first result. I can answer my own question now: Without a load the PA behave; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00473.html (11,911 bytes)
3. Re: LF: Re: Current mode class D PA for 475 kHz - success (score: 1): Author: Stefan Schäfer <[email protected]>; Date: Fri, 01 Jun 2012 00:53:58 +0200; Hi Jay, LF, Thanks very much again! Well, if the PA efficiency is 90% with standard parts, what can you achieve with the speial core material? I can obtain the 77 ferrite material here but never hear; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00215.html (15,724 bytes)

Current List: 1 - 3
Page: [1]