Austria Theory AM case studies
Austria Theory AM · Put your knowledge to work in context.
This page introduces the Austrian amateur radio theory examination for licence class A, the higher of the two Austrian amateur radio certificate classes. Class A candidates are expected to demonstrate solid technical understanding alongside a firm grasp of the operating rules that govern amateur stations, which makes the theory paper the demanding part of the path for many candidates. The Austria Theory AM case studies are 5 cases and about 3,366 words.
1Class 1 licence, cross-border interference and the 2 m band
You hold an Austrian Class 1 (CEPT HAREC) licence and are operating a 2 m FM station from a hillside site near the Slovenian border. Power at the antenna is 50 W into a 3-element Yagi aimed east.
723 words, about 4 min2Choosing a feed line for a 70 cm installation
You are installing a 70 cm station. The run from the shack to the antenna is 25 m.
694 words, about 3 min3Intermodulation in a shared mast preamplifier
A contest station shares a mast with a strong FM broadcast transmitter 300 m away and a paging transmitter on 150 MHz. The station uses a wideband mast-head preamplifier with 20 dB gain and an input intercept point of -10 dBm, feeding 40 m of coax to a receiver with a 10 dB noise figure.
628 words, about 3 min4Mains-borne noise on a low-band receive antenna
A receiving station on 80 m uses a long wire fed with coax through a 9:1 balun. The operator hears a strong buzz that rises and falls with the mains cycle, strongest when the antenna is connected and absent when a dummy load replaces it.
647 words, about 3 min5Power measurement and licence compliance on 2 m
An operator builds a 2 m amplifier using a surplus module rated at 100 W output. The licence permits 100 W PEP at the antenna for the class held, but the operator measures 130 W at the amplifier output with a power meter reading into a 50 ohm dummy load.
674 words, about 3 min