Aprs documentation

Hits

Aprs documentation

this documentation and most other files listed here are the work of bob bruninga, wb4apr

post 01 Feb 2024

APRS Software location information Links →

29

APRS Tracker with 89C4051
aprs tracker with similar unction as tinytrack but using a at89c4051 or at89s4051 in ver 2 microcontroller

APRS Servers
listed below are all known to me aprs servers

Microsat APRS

An End Fed Inverted Monoband Vee An End Fed Inverted Monoband Vee has a low impedance point around 1/4 wave away from ground, and the multiples of 1/4 wave on the feed side

40m Moxon Antenna The input impedance of our antenna is 50 ohms, balun 1: 1. with coaxial RG213 of 15 cm in diameter and 5-6 turns from the winding

Dipole antenna length calculator Sequencer with cw memory keyer combines functionality of an automatic cw keyer, 4 channel sequencer and simple computer interface for ptt switching and cw manipulation

Sequencer with cw memory keyer The tuning is simple unscrew nuts and move the clamps up or down until you get the SWR correct

Moxon 433 mhz This is an intriguing antenna. Compared to a full-size 2 element yagi it is much smaller, yet gives comparable performance

30-40-meter vertical I built this antenna specially to be used on the 30 meter band. The coil used is big enough to cover the 40 meter band as well. The coil is a bit over kill to just run 200 watts through it, but it was given to me. This coil came from a broadcast transmitter

40m 2el Yagi linear load This 40m yagi, which shows very high performance on our tests, isn't ispired from any other model. Lots of yagi models are analyzed and this model figured out. The most spesific part of this model is having belove 1:5 SWR value and 175 khz bandwith

Bazooka dipol How to make a Bazooka for balanced output

Aprs documentation

Antennas Type