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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Cardioid RX antenna for LF... |
| From: | Hartmut Wolff <[email protected]> |
| Date: | Sun, 13 May 2012 22:37:32 +0200 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows NT 5.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 |
Am 2012-05-13 19:08, schrieb Stefan Schäfer: Any ideas, experiance or advice? Stefan, your model shows a lot of thermal noise and the gain is very low. Outer Ring below 70dBi is not useable.Attached is a Eznec file with a cardiod antenna I used with good results. The additional preamp had about 20dB gain. The here mentioned antennas from Dallas Lankford are mostly Flag arrays which are working great down to 0,5MHz! But for 137kHz the gain is to low. -- 73 Hartmut
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