Rockmite ][ 20m TransceiverPrice: $50.00
QRPme is excited to continue the legacy of Dave Benson's, K1SWL, nifty Rock-Mite QRP transceiver kits.
I've just upgraded the kit to include ALL the mechanical components that are required to put it into an enclosure or your choice. This means that orders after 10/12/2014 no longer need to purchase the Rockmite Accessory Kit to get the parts necessary for the keyer SPEED, audio VOLUME and power mods (50K & 1M pots, on/off switch and LED and resistors)
The Small Wonder Labs Rock-Mite design grew out of K1SWL's desire to offer a one-evening CW transceiver kit which would be both affordable and easy to construct. It first appeared at Lobstercon2002! - a QRP gathering on the Maine coast- in early July, 2002. It was provided to all attendees courtesy of Small Wonder Labs and the NorCal QRP club. It appeared in QST magazine in 2003, and since then, itís been wildly successful. Approximately 8000 of these have been fielded so far!
Dave has retired from QRP kitting and has allowed QRPme to carry on the legacy of the Rock-Mite. QRPme has updated the design by revamping the circuitry and circuit board thereby bringing the design up to current FCC requirements for harmonic suppression. QRPme's Rockmite ][ 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 the T-R offset on key-down. A brief tap of a push-button control switch reverses the offset to yield a second operating frequency. Pushing and holding on the push-button 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 Rockmite ][ uses two crystals. The first is used in the local oscillator for the 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.
QRPme's Rockmite ][ also replaced the surface-mount 612 mixer on the SWL's original Rock-Mite design with a DIP part making it even easier to build. There are no toroids to wind, so assembly should be a snap! The Rockmite ][ uses sub-miniature epoxy-encapsulated RF chokes instead of toroids.
- Double-sided PCB 2.0" x 2.5", plated-thru-holes, solder masked & silk screened for easy assembly
- SAME size and mounting holes as the original so MINT TIN FRIENDLY
- 0.5W power output at 13V supply
- Supply voltage range 12-15V
- AVAILABLE FREQUENCIES:
80m will be shipped with 3560 (or 3579 if specified)
40m crystals available are: 7015, 7028, 7030, 7040, 7114 & 7122 PLEASE SPECIFY WHICH WHEN ORDERING!
30m crystals available are: 10106, 10116 PLEASE SPECIFY WHICH WHEN ORDERING!
20m kits will be shipped with 14060 crystals
- Automatic T/R offset, reversible
- Built-in custom version of Ham Gadgets PicoKeyer-RM Iambic keyer, 5-40 WPM
- Built in side tone, approx. 700Hz
- Includes assembly instructions and operating tips
- ALL on-board parts, input/output connectors and wiring to connect them together are supplied in the Rockmite ][ kit
- ALL parts for the keyer SPEED, audio VOLUME and power ON/OFF switch & LED mods are also NOW included
TOTAL parts kit PRICE of $50
80m kits will include 3.550 & 3.560 crystals
40m kits will include 7.030 & 7.040 crystals. If you prefer something different from: 7015,7028,7030,7040,7114,7122 please specify
30m kits will include 10.106 & 10.116
20m kits will include 14.050 & 14.060