G4BAO.COM
Microwave Amateur Radio Station, Waterbeach. 8km North Of Cambridge JO02cg
To Contact me:
Skype johng4bao
E-mail john at g4bao dot com
QTHR
Projects
A 9cm to 2m transverter using an Ionica receive converter and the "big board"
The "big board"
If Ionica did anything useful it must have been to provide a wonderful supply of surplus bits for Amateurs. Their base station contains an awesome single PCB which contains 3 complete double conversion transmit strips, and bucket loads of other useful parts. I last saw these boards for sale at a Rally for a £1-00 each!
This project produces a transverter with around a 3.5dB noidse figure and an output of around 5 mW. enough to drive the Ionica PAs
It requires the following:
One Ionica "big board,
One Ionica receiver unit, (see GM4ISM's site)
One dual output, crystal oscillator / multiplier. Using a 90.444444MHz crystal x9 to 814MHz then x3 to 2442MHz,
1 GHz rated coax relay
a 958MHz SAW or helical filter
Power supplies +/-12, +10V
A hacksaw
System Block Diagram
