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My super iambic relaxed mode morse paddle. Made of scraps of wood, old PCB material and a set of relay contacts, it cost me absolutely nothing. How's that for a bargain? |
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Note the heavy duty bifurcated contacts for ultimate reliability and the tension adjusting saw cuts in the glass fibre PCB offcuts. The use of home made 3 core cable is mandatory. |
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Prototype processor mounted on stripboard. Plugs into mic socket, mic plugs into processor. |
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A smaller version mounted inside microphone. I had to remove the steel weights and switch to get it in. |
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Here's the commercial version. It's available from Barry at  (as are a host of other goodies for your FT-817!) Unsolicited quote: "I heard the W4RT OBP Speech Compressor on the air in a transcontinental A/B/C comparison under marginal noise conditions on 18MHz with the DF4ZS RF Clipper. The W4RT unit sounded louder in that comparison. They were both VERY MUCH LOUDER than the stock FT-817 microphone." Bonnie KQ6XA |
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Circuit of prototype processors SSM2166 Data Sheet |
