Sent from my iPhone Begin forwarded message: From: Herbert Diensthuber <kern1578@hotmail.com> Date: February 27, 2025 at 07:53:02 EST To: time-nuts-owner@lists.febo.com Subject: M100 Greetings to all members of timenuts. I am trying to repair a Ball-Efratom M100 that has developed a fault after working for about 2-3 years. I found the 2N3375 open! ( I already ordered a replacement 2N4440 ) but there 2 press-fitted units on the side of the lamp housing that I fail to get any readings at all! Are those the ntc’s or what? Both of them read open in both directions and I have not tried to remove them. I would very much any help about this 2 parts? Looking at the schematic there are ntc’s listed as RT1 but no reference is found on the BOM. I would appreciate any help I could get! Thank you very much for your help! Herbert Sent from my iPhone