[TenTec] Lubricating Orion II Heat Sink Fan

Kim Elmore cw_de_n5op at sbcglobal.net
Sun Jul 21 16:00:51 EDT 2019

A few days back, I listed a suitable replacement fan for my squealing 
Orion II heat sink fan. I said that the replacement fan was a 60 x 25 x 
60 mm unit. I was wrong: it's a70 x 25 x 70 mm unit. I bought mine from 
Mouser (because they're close to me) for $25 shipped, though you might 
find it cheaper elsewhere. I got a ADDA AD0712MB-A76GL-LF 3800 RPM ball 
bearing unit as it was quieter than the other one Mouser listed.

Kin 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
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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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