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Introduction
The T1 is a miniature, stand-alone automatic antenna tuner (ATU) that can be used with any low-power HF
through 6-meter transceiver. Despite its small size, the T1 provides a wide matching range and can handle
up to 20 watts SSB/CW and 10 watts FM/AM/digital. It’s an ideal general-purpose ATU for home, mobile,
camping, and HF Pack use.
T1 features include:
• Rugged design – can handle brief transmissions at more than twice its rated power
• Tunes with a constant carrier, SSB voice, or CW keyer – no need to change modes
• Optional remote control adapter
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provides instant recall of ATU settings when you change
bands, without transmitting
• 7 inductors, 7 capacitors, and 2 network types, for a total of 32,768 possible combinations
• Tries to find lowest possible SWR – doesn't stop at 1.5:1 or 2:1
• Works with all QRP rigs – autotuning can be done using as little as 0.5 watts
• Internal 9-V battery with low-battery indication and reverse-polarity protection
• Auto power-off and latching relays ensure long battery life
• SWR or Power shown on three LEDs, with combinations of LEDs showing intermediate values
• INFO feature reports SWR, battery voltage, etc. in CW – uses both LED and RF signaling
Specifications
Network Type L-network (series L, shunt C); C switchable to transmitter or antenna side
L and C Ranges L (inductance): 0-7.5 µH in 128 steps; C (capacitance): 0-1300 pF in 128 steps
Frequency Range 1.8 to 54 MHz
SWR Range 10:1 or better (reduced range on 160 and 6 meters)
Min. Power 0.5 watts minimum required for autotuning (2 to 5 watts recommended)
Max. Power 20 watts SSB/CW, 10 watts FM/AM/digital modes
Tuning Time 5 sec. average for initial tunes; 1 to 2 sec. for retunes
SWR/Power Display 1:1 to 3:1 and 0.5 to 10 watts on three LEDs (5 gradations)
Battery Voltage 8 to 10 V (9-volt Ultralife lithium or alkaline battery recommended)
Current Drain 20 mA average during TUNE, 0 mA when inactive (automatic power-off)
Size 4.4" (L) x 2.5" (W) x 0.9" (H) (11.2 x 6.3 x 2.3 cm)
Weight Approx. 5 oz. (0.14 kg) including battery
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Adapters for specific transceivers can be found on our web site. You can also build your own T1 remote-control
interface as explained on page 8.
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