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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: 500 kHz antenna |
| From: | [email protected] |
| Date: | Wed, 16 Jan 2008 18:04:58 +0100 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Internet Messaging Program (IMP) H3 (4.0.3) |
Hi Rik, ...................... For the TX I would like to adapt my 137 kHz TX (G3YXM-like design) to 500kHz. This would give me enough power to get 1 or 2 Watt ERP with a small antenna. ......................I use a version of G3YXM/G0MRF PA (four IRFP450) for 137kHz and 505kHz. If used on 505kHz, I have to disconnect the diodes D4 and D5 (G0MRF design). they form the 1010kHz rectangular drive signal into ?needles?. ????????. - values for the output filter (2 or 3 stage Pi-filter) ???????? pse see http://www.uwe-jannsen-dj8wx.de/TX%20equipment.htm regards and have fun Uwe/dj8wx |
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