ELECRAFT T1 Antenna Tuner User Manual
- June 6, 2024
- ELECRAFT
Table of Contents
T1con Operation manual
Overview
This is the interface to connect between “Elecraft Antenna Tuner T1” and “ICOM IC-705” for easy operation of turning
Connection
Connection procedure
- Insert CR2032 battery. Make sure to put the positive and negative ends of the batteries in the appropriate direction.
- Confirm IC-705 power is OFF. Then connect cables as Fig 1. (Warning: Never connect cables while IC-705 power ON)
- Connect Antenna and other cables.
- Confirm all cables connected properly, the IC-705 power ON.
Operation procedure
– Operate from IC-705
Refer to ANTENNA TUNER OPERATION in IC-705 BASIC manual.
– Operate from T1
Push TUNE button approx. 1sec. Once the green LED turns ON, release the
button.
IC-705 starts to transmit tone signal, and T1 starts to TUNE in both cases. Once T1 completes the turning cycle, IC-705 stops transmitting the tone signal automatically.
Termination procedure
-
[IMPORTANT] At first turn off the IC-705 power switch.
The current consumption of T1con will down to 3 microamperes.
T1 indicator may blink as below.
(1) When T1com interface battery voltage is less than 2.6V: Yellow LED will blink several times.
(2) When T1com interface battery voltage is higher than 2.6V: It depends on T1con’s mode.
– Battery voltage notification mode: Green LED will blink
– No battery voltage notification mode: LED blinks.
This mode can be switched by the method -
Disconnect T1con and T1, IC-705. Once all cable is disconnected, the current consumption of T1con will down to nearly equal to 0.
-
Disconnect the antenna or other cables.
Battery voltage notification mode
It can be changed that Battery voltage notification mode by the below
procedures. There are 2 methods to change it.
– Disconnect the T1con battery once, then insert it again. (Disconnect to T1
and IC-705 with this method.)
– Push and hold the TUNE button of T1 for more than 15 sec.
(Connect to T1 and IC-705 as Fig 1. and IC-705 switch is ON)
Responding to unexpected transmission
In case the connection to T1 or IC-705 is incomplete, or for any other reason, IC-705 cannot return from TUNE mode and continue transmission.
In that case, please turn off IC-705 immediately.
Disclaimer of liability
This interface has been tested in multiple situations but has not been tested in all environments, situations, and combinations, so you may experience abnormal situations.
We cannot compensate for any loss caused by it, so please use it at your own risk.
Thanks
Stephen Emert (KD4LYO). Without you, I cannot make it.
I truly appreciate your help.
Circuit Diagram
Please refer to the following Blog for the PIC program.
https://amateur-radio.cocolog-nifty.com/blog/