-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Tim wrote: > Shouldn't make any difference, we're not talking about AC motors, here. i am aware. it is a big problem with ac motors, not much, if any, with synchronous. > It's AC into a bridge rectifier, giving very rough DC, then into a > switchmode power supply, and nice clean DC out. granted. as far as power supplies, with hard core it is a problem as flattened wave tops cause excessive current drain and over heating. with ferrite core it is less of a problem. problem is from a slight spiking that can occur, when dc filters are on low side of rating. this can be seen with a good tb oscope. digital scopes do not tend to show effect. > Are computer PSUs so scummy, these days, that they only use half wave > rectification in the supply, and not enough capacitance in the filters? cheap one's may, good one's do not. it has been a while from last time i repaired switching supplies due to price reductions, as it is now cheaper to replace than to repair. just as it is with a lot computer equipment. beauty of switchmode supply is that they work with high frequency, which allows better use of ferrite core and lower farad caps, thereby reducing heating and cost. all in all, biggest thing to know and remember, as i feel sure 'poc' and other readers of his post, plug equipment into proper sockets. no reflection on you 'poc', i have not do it yet, but that does not mean that i may not. if i ever do, i hope that it is with my own equipment and not that of a client. - -- tc,hago. g . without fences, who needs gates. - --. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Mandriva - http://enigmail.mozdev.org iD8DBQFIIhEpQCGYa6nWX2MRAmXTAKDcbXhgaBcyipv2qytQacajYVmVqACfee/J HQn4TD5JecksO5Nad8GH9zI= =vNcz -----END PGP SIGNATURE----- -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
