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Re: HP 140 Series Fan Noise

 

My recently acquired HP-140B (yesterday!) has a fairly noisy fan. If it becomes bothersome, I¡¯ll replace it, as I did the fans in my 5245 and 5248 counters.?

I can¡¯t find a temperature spec for the 140B in either the manual or my HP catalogs, but typically the high temperature limit is 50C. If you have a ¡°laboratory¡± environment with reasonable temperatures, the ¡®scope can get by with a quieter fan that blows less air.?

Jeremy?


On Tue, Apr 2, 2024 at 12:51?PM Tom Lee <tomlee@...> wrote:
You must have an Opt 101X (aka "strangling hamster"). If lubrication
doesn't take care of it, swap out the fan.

-- Cheers,
Tom

--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
Mall
Stanford University
Stanford, CA 94305-4070


On 4/2/2024 12:42 PM, n4buq wrote:
> Do all the 140-series scopes have extremely noisy fans?? My 140B is excessively noisy and I'm wondering if a different fan could be substituted.? I don't mind the wind noise all that much, the whine that's associated with it is pretty obnoxious.? I haven't lubricated it yet but I suspect that won't really knock down that whine very much (if at all).? Looking for suggestions.
>
> Thanks,
> Barry - N4BUQ
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