I use on several Rb's a small 5 X 5 X 1 cm Nidec 60 mA fan with a linear temp regulator. I can not hear it and it is mounted on the outside back plate of the chassis with the Rb on the other side of the back plate. In one case I have the fan mounted with four rubber grommets inserted in the chassis with screws through their center in an other case I have a Rb vibration mounted with its back plate with heat sink protruding through the back. It is amazing how much cooling such a small fan produces and I have not been able to detect any vibration by attaching a cheep Xtal Osc. to the Rb assembly. On my FRS unit which I would call my portable unit that runs off a 12 V battery the typical fan current is about 37 mA with a 45 C back plate. Bert Kehren In a message dated 7/17/2011 2:46:27 P.M. Eastern Daylight Time, [email protected] writes:
If I use a Muffin Fan to cool the Rb (both are mounted in the same box, in close proximity to each other), will the noise and/or vibration affect the stability of the Rb oscillator ? Thanks, Dick, W1KSZ _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
