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Home > Classifieds > Astromart Classifieds > Telescope Making > Classified #204063

For Sale: Noiseblocker ultraquiet fans FOUND

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After researching the internet for vibration-free quiet fan for a Dob application, I nailed the choice on the Noiseblocker brand. They are simply the best (below audible threshold) but have to be special ordered from Germany. To save on shipping cost I would need 3-4 persons to join me on my order. I am planning on one 120x120mm fan behind the mirror and two 80x80mm fans on the side of the mirror. I would like to move on the order hoping to catch the Mars opposition. If you would be interested in the same combination (1+2 fans) drop me a line.
Add on: there were some questions why you need "ultraquiet" fan. There is a relation between "quietness" and absence of vibration. You can hang the fan on springs/rubber slings, but why not to remove the (potential) source of vibration right at the source ?

Noiseblocker ultraquiet fans

Below mirror
NB-UltraSilentFan-SX2Pro Blacksilence
109 m3/h
12 - 26 dB/A
5- 13 Volt DC
double precision ball bearings
ca. $22

2 fans on the side
NB-UltraSilentFan-S1 Blue
noise 9-11 dB/A (only!)
4 - 13 Volt DC
double precision ball bearings
potentiometer included
ca. $16.5

plus US Priority shipping $5 in CONUS

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