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CW transceiver kit
R ock-Mite is a crystal-controlled direct-conversion transceiver available for 80M, 40M, 30M or 20M. It features an on-board 8-pin PIC microcontroller which controls a T-R offset on key-down. A brief tap of a pushbutton control switch reverses the offset to yield a second operating frequency. Pushing and holding on the pushbutton activates the speed adjustment routine for the built-in Iambic keyer. If you'd rather use an external keyer or straight key, there's a 'drop-through' mode which allows use of an external keying source.
You'll note in the image above that the Rock-Mite uses two crystals. The first is used in the local oscillator for transmitter and receiver. The second is used as a receiver front-end filter. This crystal significantly reduces the SWBC energy present at the receiver mixer; as a result, unwanted SWBC reception is dramatically reduced.
The Rock-mite uses one surface-mount part with fairly large spacing. There are no toroids to wind, so assembly should be a snap! The Rock-Mite uses subminiature epoxy-encapsulated RF chokes instead of toroids.
- Double-sided PCB 2.0" x 2.5", plated-thru-holes, solder masked & silkscreened for easy assembly
- 0.5W power output at 12V supply.
- Supply voltage range 8-15V
7030 kHz (QRP calling frequency)
7122 kHz (US Novice/Tech+)
-automatic T/R offset, reversible
-Built-in Iambic keyer, 5-40 WPM
-Built in sidetone, 700 Hz
- Includes assembly instructions and operating tips
- All on-board parts supplied in kit (as pictured above)
For more information visit : Small wonder labs
This is my Rock Mite built on May 2004. I chose the band of 14.060 MHz because I think that twenty meters are a good band for QRP. I usually go on air with the 9V battery that allows to have about 0.2 or 0.3 Watt of power!
I suggest to all OM to build Rock Mite because itís simply to do and it gives satisfaction.
Frequently asked question....
How to use the Rock Mite with a vertical key ?
The right way to setup the Rock Mite for the vertical key use is as follows :
Have fun with your Rock Mite!