Audio amplifier will drive speaker to room filling volume
In / out switch
Use with phones or speaker
Will work with other qrp rigs and older receivers
Measured peak bandpass 700 to 1000 Hertz
The “toothpick” is a simple variable bandpass audio filter designed to compliment the “Splinter” QRPp Trans-Receiver. The filter also contains an audio amplifier which can produce room-filling volume when used with an external speaker. When used with the “Splinter” the filter has the added bonus of amplifying the sidetone oscillator during transmit. Although the design is simple and physically similar to the “Splinter” there is no reason that the “Toothpick” could not be used with other simple or vintage receivers needing a little extra audio filtering.
Handmade CW keys by RA1AOM CW FOREVER !
You must have at times,
Thought into the past,
Where some things go out
While others last
What comes to my mind is
The old Morse code,
That has weathered the storms
9A5N Solid State CW Paddle – new sense of CW keying Photo by DM9EE
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