Hello, After almost 18 years, my workhorse the Elecraft ATU T1 stopped working: - I used it continuously with max. 10w usually 2-5 watts. - I broadcast on the 40, 30, 20m and sometimes 80m bands. - When I press the "Tune" button, there are no LEDs. - The other modes do not work either. What I have done: - changed Battery (9 V). - cleaned/roughened Battery contacts . - Visual inspection of electronics - rough cleaning - replaced cable. - checked external wiring to antenna - removed temporarily MCU to check corrosion - used external PWR/TUNE switch / pulling J3-ring to ground to enable auto-tuning:
This worked in so far as the yellow LED started blinking and the SWR showed a mismatch, but transmitting (on several bands ) didn't trigger the circuit or any reaction. The Atu does not look for another combination. One thing for sure: I have to change the two switches. I know the T1 is old, but it worked until now every day and I do not have the feeling that something is really broken, for from time to time it works. Any ideas how to proceed? 73 de Hajo DL1SDZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
