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21 January, 2006

Elecraft K2: Using the KPA100 loudspeaker when the KPA100 is remoted

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When the KPA100 power amplifier is external to the K2, the KPA100 loudspeaker is unused. I wanted to use it for other rigs that need a...
09 December, 2005

25 part transmitter for the QRP Minimal Art Session

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My Minimal-Art-Session rig shown here was made for class B of the QRP-MAS competition which is in May every year. In class B the trans...
4 comments:
15 May, 2005

Adaptation of some Morse programs to Norwegian

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Nice drawing of Bencher keyer by Dutch radio amateur Dick Kraayveld, PA3ALM ( http://www.morsecode.nl/pa3alm.html ) Norwegian has thre...
15 May, 2004

QRP Antenna Tuner

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My 75 meter horizontal loop antenna is tuned by a home-built Z-match antenna tuner, a slightly modified version of the Norcal BLT (Balan...
02 August, 2003

Unleashing the LM386

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From Wikipedia Commons, author 'Samba pa ti' The LM386 must be one of the most popular audio output amplifiers among radio amat...
5 comments:
22 April, 2003

Inductance and capacitance adapters for a digital voltmeter

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The adapters have been built from the drawings in chapter 26 of the ARRL handbook for radio amateurs, 2000, using the ARRL PCB templates....
02 April, 2003

Using pin 7 of the LM386 to reduce BCI and add side tone to Pixie 2

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The Pixie is a full break-in transceiver which is attractive for its simplicity, yet it performs well enough to be used for real contacts. T...
4 comments:
05 February, 2003

Keyer-in-a-mouse

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I use the K1EL K10+ chip as a morse trainer. The chip has more features built-in than I'll ever get use for. The keyer is built i...