FEATURES
- Fully Automatic Antenna Tuner NFG-230 specially designes for JST-135 -
1. Microcomputer-Controlled Full
Automatic Tuning
The full automatic tuning has been realized
by a 1-chip 8-bit microcomputer, which controls an LC tuning circuit
with the aid of various sensors. The perfect tuning is obtained only
by the switch operation on the front panel of JST-135.
2. Wide Tuning Range
Since
the NFG-230 tunes to the various types of antennas such as dipole,
whip or lang-wire antenna in the wide frequency range of 1.8 MHz to
30 MHz, the multi-band operation is possible with a single antenna.
The SWR after tuning is 1,5 or less.
3. Memory Function
Since the
tuner memorizes the tuning data for the operating frequency, the
perfect tuning is obtained when the same frequency is selected. The
data is backed up by a lithium battery for five years or more. .
4. Use of Custom Hybrid IC
The
use of a custom hybrid IC in the sensors, the heart of automatic
tuner, has realized the compact and high reliable tuner.
5. Functions for enhanced
availability.
A. Tuner "Through" Function
The
tuner can be made as "through" to prevent the sensitivity
reduction when the receiving frequency is out of the ham bands.
B.
Tuning Interrupt Function
Even if the tuning has startet, the
operation can be interrupted by the switch operation of the
tranceiver. At this time, the originaltuning data is retained. This
function is provided to protect the tuning data from unwanted change
due to inadvertent operation.
6. Compact and Waterproof
Construction
The tuner has been designed to be compact
waterproof to withstand severe environmental conditions, especially
considering the close installation to an antenna.
2. SPECIFICATIONS
|
Frequency range |
1,8 to 30 MHz |
|
Maximum input power |
200 w PEP |
|
Tuning range |
Resistance value 5 ohm to 1 kohm |
|
Input SWR after tuning |
Less than 1 : 1,5 or less (Depends on the antenna used.) |
|
Tuning power |
More than 5 W, less than 30 W |
|
Tuning time |
2 to 4 seconds typical Max. less than 10 sec) |
|
Input voltage |
13,8 /24 V DC +- 15 %, negative ground |
|
Dimensions |
230 (230)W x 90 (100)H x 380 (430)D mm |
|
Weight |
Approx. 3,.5 kg |
The circuit and specifications are subject to change without notice.