The ICOM IC-F121 is a rugged, reliable analog VHF mobile transceiver widely used in public safety, construction, transportation, and industry. While the radio itself is straightforward to operate, programming and installing it requires the official manual — but not just any manual. There are actually three distinct documents, and knowing which one you need is critical.
Low Power Indicator: Appears when you aren't using the full 50W to save battery or reduce interference. 2. Essential Operations
Advanced Features
The ICOM IC-F121 is a rugged, reliable analog VHF mobile transceiver widely used in public safety, construction, transportation, and industry. While the radio itself is straightforward to operate, programming and installing it requires the official manual — but not just any manual. There are actually three distinct documents, and knowing which one you need is critical.
Low Power Indicator: Appears when you aren't using the full 50W to save battery or reduce interference. 2. Essential Operations
Advanced Features
Ligeti and mathematics
The renowned mathematician Heinz-Otto Peitgen talks about his friendship with György Ligeti, the composer's interest in mathematics and the discoveries of chaos theory.
First page of the autograph fair score of L’escalier du diable (Paul Sacher Foundation, Basel).
Copy of the autograph fair score of L'escalier du diable, with annotations by the composer, page 1 (detail), Paul Sacher Foundation, Basel. The inscription in the right-hand margin reads 'revised MS, this is authoritative'.
Copy of the autograph fair score of L'escalier du diable, with annotations by the composer, page 1 (detail), Paul Sacher Foundation, Basel. The inscription in the right-hand margin reads 'revised MS, this is authoritative'. icom icf121 manual
Bar 7-2: György Ligeti: Étude 13, bar 7/2, left hand, 9th – 11th quaver (eighth note)
Bar 36-3: György Ligeti: Étude 13, bar 36/3, right hand, 9th – 12th quaver (eighth note) Navigating the ICOM IC-F121: A Practical Guide to
Bar 41: György Ligeti: Étude 13, bar 41/1, left hand, 8th – 12th quaver (eighth note)
Copy of the autograph fair score of L’escalier du diable, with annotations by the composer, page 6 (detail), Paul Sacher Foundation, Basel. CTCSS & DTCS: Standard "Privacy" tones (PL/DPL)
Bar 45-3: György Ligeti: Étude 13, bar 45/3, right hand, 11th – 12th quaver (eighth note)
Bar 46-1a: György Ligeti: Étude 13, bar 46/1, right hand, 3th – 4th quaver (eighth note)
Bar 46-1b: György Ligeti: Étude 13, bar 46/1, right hand, 5th – 7th quaver (eighth note)
