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| To: | rsgb_lf_group@blacksheep.org |
|---|---|
| Subject: | Re: VLF: here no results from DK7FC's 8th experiment |
| From: | "Roelof Bakker" <roelof@ndb.demon.nl> |
| Date: | Sun, 24 Oct 2010 18:08:31 +0200 |
| In-reply-to: | <1287855842.4cc31ee2b778a@imp.netikka.net> |
| References: | <4CC05B8F.2030406@iup.uni-heidelberg.de> <1237369649.1611432.1287678227104.JavaMail.fmail@mwmweb077> <4CC070EA.30703@iup.uni-heidelberg.de> <op.vkxspwijyzqh0k@pc-roelof> <4CC1C2EF.8080007@iup.uni-heidelberg.de> <757145.20787.qm@web111905.mail.gq1.yahoo.com> <979620351.2557914.1287853881158.JavaMail.fmail@mwmweb077> <1287855842.4cc31ee2b778a@imp.netikka.net> |
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Hello Paul-Henrik,I have build a special mini-whip for Michael Oexner, which uses CAT5 network cable for RF and DC feed. It is equipped with an isolating transformer in the mini-whip and antenna interface plus common mode chokes in the DC feedline. The isolating transformers are obsolete MCL type TT1-6's, which have a lower roll off of 4 kHz. I had a limited supply of TT1-6's and have replaced them with a home made transformer wound on a Amidon BN-73-202 binocular core. As far I can see the frequency response is the same.Unfortunately I had to go out of town on Saturday and could not participate in the experiment. 73, Roelof, pa0rdt |
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