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| To: | [email protected] |
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| Subject: | LF: Smaller DC feeding choke in class E amplifier |
| From: | "Johan H. Bodin" <[email protected]> |
| Date: | Fri, 07 Mar 2008 21:35:11 +0100 |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Thunderbird 2.0.0.12 (Windows/20080213) |
LFers,the usual design equations for class E amplifiers assume that the DC feeding choke has a very large inductance in order to keep the DC current practically constant over the RF cycle. I am in the process of building (yet another) class E CW QRP transmitter and the need for an almost infinite inductance has annoyed me for quite a while. Somewhere between the solder smoke puffs, I did some googling and found this interesting paper: http://www.msm.ele.tue.nl/~dmilosev/ECCTD2005.pdfMy current project is a small 80m TX but I think this information is applicable to LF as well. 73 Johan SM6LKM |
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