Thanks, Kim. I’m glad you got it fixed.
You tried! But what a sad commentary on our disposable society.
73,
Bernie
> On Jul 14, 2019, at 16:35, Kim Elmore <cw_de_n5op@sbcglobal.net> wrote:
>
> Although lots of time has passed, I wanted to let everyone know that I had no
> luck lubricating the old PA muffin fan on my Orion II. I tried everything
> everyone suggested and it simply got worse. It squealed quite loudly in the
> end.
>
> These are 60 mm x 25 mm x 60 mm muffin fans and common as dirt. I had three
> in my one of my parts boxes, so I slapped in an old one and -- Lo! And
> behold! -- it was quiet. This one turns in the opposite direction, but that
> doesn't matter. I looked it up and, not only does it have ball bearings, but
> it moves even more air (27 cfm vs 25 cfm) and uses less current (0.14 A
> instead of 0.23 A). If yours wakes you up with a surprising squeal, get
> anything of the stated size with ball bearings and replace the old one! It's
> not worth your time to keep trying to resurrect the original one.
>
> Kim N5OP
>
>
>> On 5/13/2019 2:01 PM, Stuart Rohre wrote:
>> Kim had a great suggestion, which eases the application of new lubricant to
>> heat sink fans.?? Tilt the radio such that the central fan bearing is
>> pointing UP, before you heat up the fan to suck in new lubricant on the cool
>> down step.
>>
>> The Fans at Mouser are so good and reasonably priced, that getting a new fan
>> overnight is a most time saving step. Match the overall dimensions with the
>> old fan.?? The new fans have a ball bearing model.
>>
>> I have done the fan rejuvenation a number of times but last few timees, I
>> bouight new fans, and also rejuvenated the old one. That way, I have plenty
>> of spares for future use.
>>
>> Stuart Rohre
>> K5KVH
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>>
> --
>
> Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
> SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)
>
> /"In theory there is no difference between theory and practice. But, in
> practice, there is." //??? Attributed to many people; it???s so true that it
> doesn???t matter who said it./
>
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