The CG-3000 is a very affordable automatic tuner for shortwave 1.6 to 30MHz, for feeding verticals, longwires, dipoles etc. Like the well known SG-230 this tuner is primarily intended to feed wire antennas or monopoles, the antenna connector is simply a high voltage connector. If you intend to connect coax just connect the shield to ground. The tuner has a tuning range of 12 to 1000 Ω, max. power load is 150W.
Once a setting has been found it is stored in non-volatile memory, so that a new tuning on similiar frequencies happens very fast. The tuner uses a Pi network design which has the advantage (compared to L networks) that is acts as an additional low-pass filter, reducing spurious emissions.
The CG-3000 tuner is operated with 12V DC, other cotrol wires are not required. The solid plastic case is suitable for outdoor use, size approx. 365x240x75mm. U bolts with 55mm width are included. The minimal required antenna length is 2.5m for frequencies of 6MHz and up, or at least 8m for 1.8MHz and up. With a small glassfibre pole (not included) and some wires (not included) a good allband antenna is constructed within minutes.
Frequency: 50 to 53MHz(Center frequency without adjustment is set to 51MHz)
Gain: 6.3dBi / Max.power rating: 400W(SSB)
Impedance: 50ohms / VSWR: Less than 1.5:1 (50 to 52MHz without adjustment)
FB ratio: More than 15dB / Half power band width: Less than 70degrees / Wind surface area: 0.14m2
Rated wind velocity: 40m/sec.
Turning radius: approx.1600mm / Connector: MJ (PL)
Mast diameter accepted: 25mm to 56mm
Daniel Schäffler | Triemlistrasse 23 | CH 8047 Zürich | HB9DDS | JN47FI