Rock-Mite 20m Transceiver
The Rock-Mite transceiver
The Rock-Mite is a crystal controlled transceiver kit designed and sold
by Small Wonder Labs.
I've chosen the 20 meter version and equipped it with a variable
oscillator (VXO). This facility offers a tuning range of 10
kHz (14.052 - 14.062 MHz). The RF output is 500 mW.
receiver is a direct-conversion type, which means that all selectivity
is at audio frequencies. I have added a 2-stage audio
filter (circuit diagram by KD1JV - you can find it here at the buttom of the page) to enhance selectivity. The finished audio filter can be seen in the photo below.
The Rock-Mite (factory photo).
The KD1JV audio filter.
The Rock-Mite files it a useful
homepage for Rock-Mite info and ideas. The Rock-Mite even has its own Yahoo
I substituted the default keyer IC with a PicoKeyer-RM, which is an electronic keyer with two message memories containing each 100 characters.
Operating the Rock-Mite
following table lists the QSOs that I've made with the Rock-Mite. My antenna was a 43 m horizontal loop (loop
skywire antenna) as described on this page. Call YYYY-MM-DD UTC Note
SM5RU 2011-01-09 12:40
G8RW 2011-01-09 13:10
UA9AR 2011-01-10 04:55 DX
UA9AYS 2011-01-10 05:05 DX
Created 15-Jan-2006, updated 28-Aug-2014.
Author: Lars Petersen,