|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?|
|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.|
|Prototype processor mounted on stripboard.|
Plugs into mic socket, mic plugs into processor.
|A smaller version mounted inside microphone.|
I had to remove the steel weights and switch to get it in.
|Here's the commercial version.|
It's available from Barry at
(as are a host of other goodies for your FT-817!)
"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."
|Circuit of prototype processors|
SSM2166 Data Sheet