Misc. Ham Radio Software
- n1owu_ant.zip: This is a
collection of (mostly) Unix C and Tcl/Tk programs to control radio
stuff over a network.
- antpic.asm: A 16F84 program to
control an antenna rotator via an Icom CI-V serial port. This
controls the rotors based on timing, and does not need any position
sensors and related wiring. I have used it with Radio Shack
- kenciv.asm: A 16F84 program to
control a Kenwood radio via an Icom CI-V serial port. Lets you
control a mix of Kenwood and Icom radios from the same serial port!
- antciv.asm: A
16F876 program to control antenna rotators with position-sensing
potentiometers (e.g. Yaesu) via an Icom CIV- serial port. Has
nice features like an interface to a LCD module, and jammed motor
detection. This is what I am currently using.
of my rotor controller hardware. You can see the the microcontroller
motherboard and the relay board (both from
the LCD display board (from
Scott Edwards Electronics
), the 12-volt power
supply transformer, the 30-volt transformer taken from the Radio
Shack rotor controller box, and a 12-volt regulated power-supply board.
- Adding a position sensor to a Radio Shack
My AO-40 Antenna Setup
||Here is my antenna system for AO-40. It consists of:
- Radio Shack Azimuth Rotor
- Yaesu G500 elevation rotor
- Homebrew 2 foot dish for S-band with helix feed
- DJ9BV S-band preamp on dish feed (in the mayonnaise jar!)
- Arrow yagi for 2 meters and 70 cm. (Since this photo
was taken, the Arrow was replaced with a KLM 435-18C.)
||The latest setup with a KLM 435-18C for 70cm, and a Diamond
7-element beam for 2 meters.
||The 2-foot dish I built. It's made from 12
one-foot-long 1/4" steel rods welded to a central hub, with a ring to
stiffen it. It is covered with expanded metal mesh.
Unfortunately, due to its all-steel construction, it weighs a ton.
||A close-up of the helix feed. There is a quarter-turn
matching strip at the base of the helix, which you can't really
see. Also note the rain shield for the matching strip. The
plastic mayonnaise jar protects the preamp from the weather.
||A shot that shows some more detail of the rugged all-steel
The RG-142 feedline runs through the feed support tube so as not to
block any of the dish aperture.
Here are some more pictures of the
Other Equipment for AO-40 Reception
- DJ9BV premap for 2400 MHz: 0.5 dB NF, 33 dB gain. (In the
- Old-style DEM 2400-144 downconvertor (In the attic, right under
- Homebrew PIC-based antenna rotator controller. (See above.)
- Kenwood R5000 receiver (with VHF module).
- Icom IC-821 satellite transceiver.