Our group is currently developing a RF transceiver for portable use. We will make all information available here you need to make your own.

Main features will be (all subject to change due to technical progress and your hints):

• Rx/Tx cover 0 to 30 Mhz
• small size (abt. 120 x 180 x 60 mm)
• 10 Watts RF Output in CW-mode
• only widely available parts used
• low cost (less than $300 )
• all information available free including controller source code

• Big 6 digit 7-Segment LC-Display for frequency-display
• direct digital synthesis (Analog Devices AD9850)
• direct conversion receiver
• more than two vfo's, RIT/split/UP/DOWN plus some memories
• integrated keyer
• target power consumption 100 mA receiving
• PC Interface
• RISC controller Atmel AT90S8515
• programmable NF-Filter

Where are we right now ?

The controller board was nearly finished when we had to switch to a different controller family to add some features. So DL3DAZ has nearly finished redesigning the program. View prototype picture. Download circuit diagrams from download area

Some receiver designs have been tested, currently we are planning to use a single sideband phasing method direct conversion receiver.

In march a working prototype must be ready as DL3DAZ will do a business trip and has no portable equipment right now.

As in our group is no knowledge about DSP, we will use a switched capacitor filter. (Any idea? Low power solutions are very welcome)

DL4DZ prefers mobile phone dot matrix displays. Any manufacturer out there who could make some available to us for this purpose ?

DF2CH is working on the controller PCB. See our download area
 

NEW: Changed download file format to zip, so all users will be able to unpack then. (I was told, there is no "tar" included in Windows59...)

NEW: Version 1.0 : Serial In-Circuit Programming Software for Atmel AT90Snnnn.
Features:

• No external logic required. (Only 1 Capacitor)
• Connect AVR-Controller directly to parallel port
• C-Source-code available (only)
• Tested with AT 90S8515 and Linux

Update:Controller source code for Atmel AT90S8515. Very early version.
What works:

• Change frequency of DDS-chip
• Repeat function for keys
• Select digit to be changed
• Store settings to eeprom

 
A Picture of DL4DZ,DF2CH and DL3DAZ in cqww-cw 1998 running an IC-751
 
 

 
 
  Last update: 03/11/1999