Re: HP 41 high-pitch noise Message #8 Posted by Frido Bohn on 19 Aug 2009, 4:39 a.m., in response to message #1 by Frido Bohn
Thank you for your numerous contributions!
However, I turned the HP-41CX on to perform the recommended master clear and was surprised not to hear the noise anymore.
Apparently, a rest of two days was sufficient to resolve this problem spontaneously.
I was trying to follow-up the cause for that noise and came to the conclusion that an overnight run of the calculator was possibly responsible for the problem. It was attached in an HP-IL loop to run as a data logger. Perhaps a charge which might have developed in the circuits was the origin of the high-pitch noise.
Nevertheless, I will have an eye on this, and the next time I will try to resolve this by the generation of a TONE or by a master reset, and keep you informed.
Regards, Frido
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