The Palstar BT1500A is built exactly for one reason – to tune to the best possible balanced antennas. There is no trade-off with antennas fed with coaxial cable, nor with unbalanced feed. The Palstar BT1500A with two roller inductors on a tree and a variable capacitor with two sections is designed to be truly balanced. This makes an almost perfect adjustment for the antennas fed open thread possible (even with high power). Variable capacitor can be enabled both on the input or output. When the variocap is on inlet provides a high-pass filter and low Z when output side a lowpass filter Z and. This offers several ranges of impedance for different antennas and applications, making it the most versatile tuner. As with all great tuners from Palstar, Ta-4 k has a large cross-needle with backlight. Passage range from 300 to 3000W provides instant overview of back and forth power as well as the resulting SWR. The instrument has a "Peak and Hold ' function to read the peak values are more accurate and easier. Power requires 12V, max 200mA.