Earlier instruments · Discontinued
Electromagnetic Pentagonal Antennas
Two passive antennas I made in small numbers in 2024 and no longer produce. They pick up the hidden sounds of electronic devices and, away from them, natural radio: thunderstorms, solar storms and VLF signals.
No longer made. These antennas are not for sale. If you own one and need help, write to me.
XLR · 2024 · Discontinued
Pentagonal Antenna (XLR)
A mono, passive antenna on a dyed black wooden frame, wound 407 times with 0.15 mm enamelled copper wire, with a handle of recycled cork. It plugs into any XLR input without phantom power; set the gain with care.
| Inductance | 50 mH |
| Frequency range | 20 Hz to 95+ kHz |
| Resistance | About 150 Ω |
| Output | XLR, balanced (male) |
| Antenna | Ø 14.5 cm, 1 cm thick |
| Handle | 3 × 3.5 cm, recycled cork |
| Total length | 24.5 cm |
| Weight | 100 g |
Mini-jack · 2024 · Discontinued
Omnidirectional Pentagonal Antenna (Jack)
The omnidirectional version with a 3.5 mm mini-jack, for a standard preamp, the KOMA Elektronik Field Kit or a mixing desk. Its frame is wound 489 times with 0.15 mm enamelled copper wire; the handle is recycled cork and dyed black birch plywood.
| Output | 3.5 mm mini-jack, mono |
| Windings | 489 turns, 0.15 mm enamelled copper |
| Handle | Recycled cork and dyed black birch plywood |
| Powering | None needed: passive |
Listen
Recorded with the antennas into a TASCAM DR-40X, unprocessed.
More about the antennas and how I use them on wouterjaspers.com. Looking for something you can still buy? See the instruments in the shop.