Return to KLUBNL.PL main page
| To: | <[email protected]> |
|---|---|
| Subject: | LF: Re: LF coil tuning |
| From: | "Alan Melia" <[email protected]> |
| Date: | Sat, 29 Jan 2011 23:43:07 -0000 |
| Dkim-signature: | v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=s1024; t=1296344565; bh=Ow4u79sq12eP2OQOfaF9Y2vxveKNWonKZ49TtIHzPJY=; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-Antivirus:X-Antivirus-Status; b=qOJtc9oiToB3ZZfDGfnxSQdlMYLE2XJpWHmCJGA2rTPKrF9LEv1fPBdfdU+HQ1eAcYsEXSt62uDIYQKqU4DQ3okK3MpoD5Zfw1iZ9jFx2DvlOiUArbfiD2QGiitbRb1/33x402jwKE3EWFniL+hNYhi5ooIaNp/YjwFu7taeyI0= |
| Domainkey-signature: | a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=DKIM-Signature:Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-Antivirus:X-Antivirus-Status; b=1fyrkhi59ydvFGSVRk4KaW6ESu6uVI1Nn5u1DbcdYmu80b4yOIYqs8ese7DtJVWte7zWZmSKy47CS4ClrEVRDKPCe1Rloq7fggRPANbvTTGdszJaKWN0eHGKEx2GztxENjYoEymX8V9aJTiRrjvsS0eliyj4bbA1zUioxgD23I8= ; |
| Domainkey-status: | good (testing) |
| References: | <DF8D483685124FFBA8436BD2C5850C8E@White> <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Hi Peter I think this is analogous to putting an aluminium or brass slug into a coil as with the VHF Toko range where there is an optional ferrite of aluminium.core. I have never measured Qs I suspect it is a bit lossy maybe that is why a single shorted turn is used for a loading coil. Alan G3NYK ----- Original Message ----- From: "Peter Dodd" <[email protected]> To: <[email protected]> Sent: Saturday, January 29, 2011 11:10 PM Subject: LF: LF coil tuning > The traditional method of tuning an LF loading coil is to use a variometer. > > I have been investigating methods of tuning coils for mobile use and one > method that appeared briefly in one of the ARRL Handbooks of the 50s > was the shorted turn method of tuning. > > I tried a home made coil of 136uH on a 5cm diameter former and using a > shorted turn of 2mm insulated wire and obtained a tuning range of 32uH. > (136 - 102uH). > > Has anyone out there tried this? > > Regards > > Peter G3LDO > > > > > |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: LF: LF coil tuning, Markus Vester |
|---|---|
| Next by Date: | Re: LF: Re: LF coil tuning, John Andrews |
| Previous by Thread: | Re: LF: LF coil tuning, Markus Vester |
| Next by Thread: | Re: LF: Re: LF coil tuning, John Andrews |
| Indexes: | [Date] [Thread] [Top] [All Lists] |