Network Type Internal 9V battery Current Drain The T1 turns itself OFF after being idle for a few seconds and, since the T1 uses latch relays, the power consumption is really low. Combining 7 inductors with 7 capacitors in 2 network types, the T1 has a total of possiblities to try. The T1 is very fast, since the best match is usually found within seconds. Currently, only a ready built cable for the FT is available, but more will probably follow.

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It also includes coverage of 6 meters. A: We recommend using 2 to 5 watts for initial tune-ups. But the T1 will auto-tune with as little as 0. A: Yes. The PC board is only about 2 by 3 inches, so it could be built into just about any rig. With some effort, the T1 could be installed inside the battery compartment of the FT Q: What modes can I use to tune the T1?

Of course a constant carrier will reduce initial tune times compared to an intermittent voice or CW keyer waveform.

Q: Many stand-alone ATUs stop tuning when they reach 1. How about the T1? A: The T1 always tries to hit 1. This ensures maximum power transfer and takes best advantage of the low-pass characteristics of an L-network. Sometimes this extra effort to hit 1. Q: Does the T1 have memories? This cuts typical re-tune times to about 1 to 2 seconds. Q: Can an automatic antenna tuner be safely used with all low-power rigs?

A: The vast majority of commercial, kit, and home-built transmitters have some form of protection from high SWR. This is important when using either a manual or automatic antenna tuner, because a wide range of impedances is presented to the final stage during tuning.

SWR protection is often mentioned in the specifications or theory of operation section of a transceiver manual. If not, take a look at the schematic. If the transmitter includes ALC, current limiting, or voltage limiting i. Small transceivers of many types have been extensively tested at full power with the T1. A: No. Instead, the T1 re-tunes only when you want it to-either by holding the TUNE button or by transmitting within a few seconds of changing bands if you have a remote-control adapter.

A: Yes; it will usually extend the range of electrically short antennas to cover the entire nominal band and possibly nearby bands, too without a coil or segment length adjustment. Q: Can the T1 be used as a remote tuner? A: The T1 is intended for use near the operating position. But with a little effort it could be remoted, and its extremely small size would be beneficial for this purpose.

First, the tuner must be placed in a weatherproof container if used outdoors. Second, controlling the tuner remotely requires a shielded control cable back to the operating position; this cable must supply, at minimum, a simple switch closure to wake up the tuner. A: That depends on the battery type and how often you change bands or re-tune. Even with frequent use, an alkaline battery should last for many months, while a lithium "Ultralife" battery should last for well over a year.

The T1 checks the battery voltage on every power-up and will warn you when it starts getting low. Q: Is the T1 suitable for backpacking? A: Yes-and it will save a lot of room and weight in your pack. Even more important for hikers is that it weighs only 5 ounces, including the internal battery. The closest competing ATU weighs three times as much.

Q: How can I protect the T1 and its controls during travel or backpacking? Also, if the T1 gets turned on accidentally, it will shut itself off after just a few seconds. This takes just a few seconds thanks to the integrated 9-V battery compartment and molded-in battery clips; there are no wires to deal with.

The T1 also includes reverse-polarity protection, so no damage will occur if you put the battery in backwards. Q: Are there any surface-mount parts in the kit version of the T1? Tools and soldering techniques are discussed in the professionally written, illustrated assembly manual.

Q: Why are you offering a special remote-control adapter for the FT? This reduces QRM and conserves both tuner and transceiver battery life. We may offer similar interfaces for other low-power rigs in the future. Q: Does the T1-FT remote-control adapter work with "one-touch-tuning" interfaces? A: Not at present.





Elecraft T1 Automatic Antenna Tuner


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