I have 3 HP synthesizers with what looks like the same fan: 8672, 8673 and 8656, and they are all very loud, the worse being the 8656. On top of that, the 8656 fan still runs when the unit is in standby. I have thought many times that I wanted to replace it with a 12V model so that I could wire it to the switched 12V inside the unit so that it would run only when the unit is operating and not in standby, but that particular synthesizer draws a lot of power in standby, and I am affraid that it really needs cooling even then... So, for now, I turn it off completely between uses and until I have my GPS locked frequency reference, I sync it to the timebase in the 8673 when I need to.
I just got a 5 MHz ovenized crystal stabilized reference off eBay today, and I have a Jupiter receiver, so I am just some soldering away from a good frequency standard... Didier KO4BB Magnus Danielson wrote: >When checking the EBM-Papst site (http://www.ebmpapst.us) the 92x92x25 mm fans >did not >reach the same CFM, but those that I found (3212JN and 3214JN) was not doing >117 VAC >(they where doing 12 VDC and 24 VDC respectively). While Papst isn't all there >is to fans >they are usually a good benchmark on what is available. > >Come to think of it... I have a bunch of big nice Papst 9950 lying around ;O) >A little bigger (119x119) and eating 230 VAC but good for CFM 68,9 so almost >fit. ;O) > >Cheers, >Magnus > > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
