[TenTec] Lubricating Orion II Heat Sink Fan
cw_de_n5op at sbcglobal.net
Sun Jul 14 17:35:44 EDT 2019
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.
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
> TenTec mailing list
> TenTec at contesting.com
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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