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MrBungle · 6th Sep 2019, 10:49 pm

That explains the it then. Thanks for that. Had exactly the same problem and decided to seek a replacement rather than risk it.

AFAIK On Semiconductor are now, by merger, selling LM317's that were made by Motorola. Not gold, not 70s but possibly a derivative of the silicon and process. Probably impossible to find out now.

On the solder down option, I was inspecting a 34401A the other day and noticed that has soldered down LM317/337 pair. On the fence on that idea at the moment.

6th Sep 2019, 10:49 pm	#8
MrBungle Dekatron Join Date: Jun 2016 Location: London, UK. Posts: 3,687	Re: Defective/ fake LM317T That explains the it then. Thanks for that. Had exactly the same problem and decided to seek a replacement rather than risk it. AFAIK On Semiconductor are now, by merger, selling LM317's that were made by Motorola. Not gold, not 70s but possibly a derivative of the silicon and process. Probably impossible to find out now. On the solder down option, I was inspecting a 34401A the other day and noticed that has soldered down LM317/337 pair. On the fence on that idea at the moment.