alison@wsrcc.com (Alison Chaiken) (03/10/91)
larry@kitty.UUCP (Larry Lippman) writes: >Many fluorescent lighting systems produce a really ugly 120 Hz >signal with many higher frequency components because it is not a sine >wave due to ballast characteristics. >Larry Lippman @ Recognition Research Corp. "Have you hugged your cat today?" Indeed, during a recent visit to the University of Minnesota physics department I heard some real complaints about the noisiness of fluorescent lighting. In order to save some bucks, the administration had decided to install replace old fluorescents with new "energysaver" fixtures. The 120 Hz signal from these lights was causing intolerable problems in several different apparati. One ultracryogenics experiment was picking up a 120 Hz THERMAL signal on its thermometry. The faculty were pretty much ready to form a human chain around the building to prevent any more of their fluorescent fixtures from being "upgraded." --- Alison Chaiken alison@wsrcc.com (202)767-3603 [daytime] uunet!wsrcc!alison -- Alison Chaiken alison@wsrcc.com (202)767-3603 [daytime] uunet!wsrcc!alison