To: | [email protected] |
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Subject: | LF: My transmit converter description |
From: | Dimitrios Tsifakis <[email protected]> |
Date: | Tue, 5 Feb 2013 11:50:51 +1100 |
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Hello group, My transmit converter is now finished and tested - it survived two sessions of 50% duty cycle WSPR transmissions on 475 kHz and the results are great. I thought others may find this useful, so I have put a write-up on my web page: http://people.physics.anu.edu.au/~dxt103/472/nltt/ It is a 50 W class-e PA designed for 50 ohm impedance, so there is no need for an impedance transformer. Doesn't get simpler than that :-) The driving circuit is based on G3XBM Roger's design with the difference of a 10 MHz OCXO LO and the addition of a beefy MOSFET driver. 73, Dimitris VK1SV |
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