Return to KLUBNL.PL main page
| To: | <[email protected]> |
|---|---|
| Subject: | Re: LF: toroid xformer |
| From: | "James Moritz" <[email protected]> |
| Date: | Sun, 20 Feb 2011 20:53:14 -0000 |
| Dkim-signature: | v=1; a=rsa-sha256; c=relaxed/relaxed; d=btopenworld.com; s=s1024; t=1298235189; bh=gjKI7WvQPnTbGYS/tbz3+R6DFc8QCynqnl1r3nSf88c=; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:In-Reply-To:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MIMEOLE; b=GDx7nmQogS0s6sry6CW3yDb+5Is7mxy4dMWSEq/ZqyXClRhQ0irwX+8KwtzgZnOkH1C3fuylsfQU69datUlqVJ42Fp/gXpUyL9PBYrTdplUE/y2qoXBIxZqBs5P10mTJkDyGU+P2EOc/ABc5lkkdc5Sw/SUHpvprC/La2ZMlcBY= |
| Domainkey-signature: | a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btopenworld.com; h=DKIM-Signature:Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:In-Reply-To:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MIMEOLE; b=jf44hjW65FbmgYCH9qQCofmVjrnPlRClp8LodsjXuh3r6ne2iEWp0aoUpPCVRddVup7kGPiIC7FTpghH+qTpuwJx3ZDhAFaJ6pR3GrquOPE8qiWCN4bdDvAFmKpKmNVc+gkRnREhJyZj+qJczr5tyNI2xgYellZOY/gQT/0WMeU= ; |
| Domainkey-status: | good (testing) |
| In-reply-to: | <949432225.7185542.1298229766613.JavaMail.fmail@mwmweb068> |
| References: | <004201cbd111$5d4567f0$0401a8c0@xphd97xgq27nyf> <949432225.7185542.1298229766613.JavaMail.fmail@mwmweb068> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Dear Hans Albrecht, Mal, LF Group,A better alternative to mains transformers, etc., is to use one of the larger sizes of ferrite SMPS core sets. That way, you can design a transformer to produce the required impedance ratio for your PA, antenna and loading coil, instead of trying to do the design backwards by starting with the transformer. You need a large core compared to LF/MF to get a reasonable inductance, flux density and size of wire. I made a matching transformer a while ago that works quite happily at the 100W level at 9kHz using an ETD49 core set. I think an ETD59 core set would be OK for at least a few hundred watts. These things are available fairly cheaply from suppliers such as RS Components and Farnell in the UK. Cheers, Jim Moritz 73 de M0BMU |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: LF: test only, Gary - G4WGT |
|---|---|
| Next by Date: | LF: BHZ T/A, jrusgrove |
| Previous by Thread: | Re: LF: toroid xformer, Hans-Albrecht Haffa |
| Next by Thread: | LF: VX9MRC, jcraig |
| Indexes: | [Date] [Thread] [Top] [All Lists] |