Infinity crossover coil value
in [Repair]
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From: Arny Krueger on 30 Jan 2007 08:05 "BOB Urz" <"sound"@(remove) inetnebr.com> wrote in message news:1169253079_9287(a)sp6iad.superfeed.net > I tried to read the coil on my sencore, > and it measures about .3 MH. It won't pass any ring test (air core) so i > know turns are shorted and this value is suspect. Any clue on the value > of this coil? Probably pretty much what you measured Bob. Shorted turns ruin the Q of the coil, but crossovers aren't usually exactly what we'd call high-Q circuits. The fact that the coil measures out with an inductance that is in the same range as the other coil in the circuit suggests that what you measured is a fairly believable number. Since you've been provided the spectral response of the voltage across the driver, you have the means to verify the effectivness of the replacement coil.
From: Bob Urz on 4 Feb 2007 13:10 Peter Larsen wrote: > BOB Urz wrote: > > >>Thoughts? > > > Passive network transfer function, as I understand it when loaded with > actual loudspeaker load, is available in the .pdf you linked to. A few > trial and error substitions should lead to the correct coil value. You > really have to verify that the units are OK anyway. > > >>Bob > > > > Regards > > Peter Larsen I finally got the passive crossover design 5.1.xls to work on the computer. I had to download a program to remove spread sheet protection and it allowed me to substitute values in. It seems the .13 value is pretty close if i can believe the plotted values. I have some coils on order now to try. I used the 15.7 and 14ufd values as fixed values and subbed the coil values in and it plotted the curves. Bob Bob ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =----
From: Peter Larsen on 18 Feb 2007 04:35
Bob Urz wrote: > I finally got the passive crossover design 5.1.xls to work on the > computer. I had to download a program to remove .... Thanks you! - nice to know the outcome. Regards Peter Larsen |