Elecraft T1 Miniature ATU for all Low-Power Transceivers product reviews by real people like you. Only at – is a Web site dedicated to ham. Elecraft Automatic Tuner, max 20W, ready built. Symmetrical Antennas with optional BalUn, Longwire with BNC/Banana Plug Adapter. Elecraft Automatic Tuner, max 20W, kit. Symmetrical Antennas with optional BalUn, Longwire with BNC/Banana Plug Adapter.

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You really need a fine-tip max 1. Radio amateur and SDR hacker during the night. The assembly manual is very detailed.

Around the same time, I started to go blind due to diabetic retinopathy. The idea was to be able to position the tuner directly at the feedpoint and have the feedpoint 2 – 3 feet above ground level.

To give you an idea of how small thing are look at this picture: It’s worked well since day 1. This board contains the NPN transistor, a current limiting resistor and a three pin connector that is used to connect the cable that carries the elwcraft to the T1.

The developers at Elecraft did really go a long way to take full advantage of having a microcontroller in this kit. The instructions for winding the torroids tell you to wind one torroid in the opposite direction from the rest, but the picture in the manual and the legend on the circuit board indicate that you should wind it the same as the others. The connection to the T1 is made using a 3.

It might be best left at home when you take the out in the field, too, as it would be easy to lose it. It matched my small non-resonant attic loop, which has an SWR of more than When that is done, the green LED begins to blink for 3 seconds and, if one begins to transmit during this time, the T1 will start to re-tune.


Arduino – Elecraft T1 Interface

Open Design, No Secrets: The 4B is a re-worked MTR-5B which uses a set of 4way slide switches instead of the two banks of 3way switches in the 5B, this makes for simplified band switching. There’s a “smart” adapter cable available for the Yaesu FT The T1 always tries to find the best SWR and does not stop at 1.

I made the cable from a good quality shielded twin core microphone cable.

It is a very cool general-purpose ATU for mobile and portable use. A counterpoise made no discernable difference after trying a few different lengths It starts with just a few eldcraft and increases gradually up to 29 turns on L7. So I tried to tune again, and of course the tuner still did not work.

It is really important to not loosen the simple nut directly at the T1 enclosure, because you will have eleraft open the enclosure to tighten it again. After that, the band settings can be recalled from memory. Fortunately, I elecrft not have to do that. I think the circuitry ramps down the power too low? A modulated SSB transmission can be used for tuning, with almost as good accuracy as a constant carrier.

Elecraft T1 Tuner failing to tune – Equipment – SOTA Reflector

I am by nature very sceptic when it comes to compact user interfaces. The important functions for me are tune, bypass, read swr and read power. To give you an idea of how small thing are look at this picture:.

The rig and T1 were sitting on the ground and the wire went inverted vee at around 40 something feet. Currently, this is only possible with ekecraft Yaesu FT transceiver and optional adapter, but Elecraft has provided information about the serial data eelecraft used, to allow interfaces for other low-power transceivers to be designed. I made two cross mode cw to elcraft qso’s and several cw only contacts during my 1 hour test. The IF command contains the frequency that the radio is tuned to. I will post the files on Thingiverse shortly.


This is not the fault of the T1, of course, but a problem that could be encountered using any automatic tuner. I tried a new antenna. I was leary, at first, about laying out the money for this thing but eelecraft I’m glad I did. Circuit Description The T1 has seven fixed inductors and seven capacitors, which are switched in and out of circuit using relays to tune the matching L network.

When connected to a PC the Arduino presents itself to the operating system as a serial port so all I needed to do was program the Arduino to decode the IF command, convert the frequency into t11 band and then send the band information to the Elecraft T1.

There’s zero power consumed except when actually tuning. The T1 has 7 inductors and 7 capacitors to provide a wide tuning range. Using the T1’s Info mode another button tap combination you can find out even more information, such as the internal battery voltage, inductance and capacitance selected, network configuration and band in use. Elecraf about a dozen surgeries in both my eyes, I am back to the point where I want to play with my radio again. One user reported that it survived an accidental tune-up using more than 30 watts!

I dont regret it at all. A number of such matches are saved, so the tuner will rarely eleraft to tune completely from scratch.