Add another H-10 (6-85387) Western Allegheny with larger tender to the list - DOM 08/31/18. Previously, I had only run the sound at full volume and 50 percent EFX and infrequent use of the whistle with no issues and for a total of 10 hours.
Today, I took a shot at reproducing the sound cut-out. After 10 minutes of running at full volume and 100% EFX, it does cut out and that can be reproduced easily by blowing the whistle. Then, shut her down and let it cool off. Next, I ran it again at full volume and 50% EFX for about 10 minutes with no issues until I leaned on the whistle for long periods - that produced the cut out again easily - use of the whistle will push the temp over the top. So, looks like a re-flash of the sound board is in order.
GRJ, have you sent your sound boards in for the re-flash yet?