The antenna is a Triangle on 14/27/28 MHz
The total length of the triangle 21.3 meters.
Frequency range: 12.9 - 16.2 and 24.8 - 29.9 MHz.
Transformer 1:4 is wound on the ferrite ring N - NN, powered antenna cable RK-50.
Such an antenna is suitable for use with proprietary transceivers such as the FT-840 (or other with no antenna tuner). No adjustments to do. FT-840 within these sections provides 100W to the antenna!
Author: Igor, UA6HJQ; Publication: krasnodar.online.ru/hamradio, www.cxem.net