Infinity crossover coil value
in [Repair]
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From: Speedskater on 20 Jan 2007 16:24 Bob Urz wrote: > > > Arny Krueger wrote: >> "BOB Urz" <"sound"@(remove) inetnebr.com> wrote in message >> news:1169270006_10549(a)sp6iad.superfeed.net >> >> >>> When i can get no rings out of them on the sencore, you >>> can about guarantee some turns are shorted. >> >> >> That appears to be self-contradictory. >> >> Are you trying to saythat even though the coils pass a shorted-turn >> test, you still think they are too far gone to be worth measuring? >> > > You DON'T understand Arny. Rings are GOOD on the sencore test. Low ring > count or NO ring count means the coil is shorted. > > http://www.freepatentsonline.com/5717338.html > > This coil would show NO rings on the inductor ring test. Its shorted. > If its shorted, the measured value of inductance is not going to be > accurate. > > The ultimate solution is use the crossover circuit topography with the > listed value of caps and known crossover point (3500hz) and use algebra > to solve for the inductor value (solve for one unknown). I have been too > busy to try to figure that out. I also don't know why the tear sheets > says its a 24db filter, when the hand drawn schematic from the crossover > does not show that. It would need another inductor for that. > With two caps and a inductor, it appears to be a 3rd order. > > I have barely a few hours in the shop before i have to head off to set > up for Jeff Daniel's and do FOH sound for two shows today. > > Maybe someone with a lot of time on there hands can ID the filter from > the ascii drawing, and find the math to reverse engineer the inductor > value. There's a challenge for you Arny if your up to it. > > I am guessing its in the .13 range at this point. > > 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 =---- Consider that the speaker driver acoustic roll off may supply one pole.
From: Arny Krueger on 21 Jan 2007 17:34 "Bob Urz" <sound(a)inetnebr.com> wrote in message news:1169311899_13943(a)sp6iad.superfeed.net > Arny Krueger wrote: >> "BOB Urz" <"sound"@(remove) inetnebr.com> wrote in >> message news:1169270006_10549(a)sp6iad.superfeed.net >> >> >>> When i can get no rings out of them on the sencore, you >>> can about guarantee some turns are shorted. >> >> >> That appears to be self-contradictory. >> >> Are you trying to saythat even though the coils pass a >> shorted-turn test, you still think they are too far gone >> to be worth measuring? > You DON'T understand Arny. Right Bob I can't read your mind. You wrote a post in a way that would only be meaningful to someone who had experience with a specific piece of fairly esoteric test equipment.
From: Speedskater on 21 Jan 2007 18:36 Arny Krueger wrote: > "Bob Urz" <sound(a)inetnebr.com> wrote in message > news:1169311899_13943(a)sp6iad.superfeed.net >> Arny Krueger wrote: >>> "BOB Urz" <"sound"@(remove) inetnebr.com> wrote in >>> message news:1169270006_10549(a)sp6iad.superfeed.net >>> >>> >>>> When i can get no rings out of them on the sencore, you >>>> can about guarantee some turns are shorted. >>> >>> That appears to be self-contradictory. >>> >>> Are you trying to saythat even though the coils pass a >>> shorted-turn test, you still think they are too far gone >>> to be worth measuring? > >> You DON'T understand Arny. > > Right Bob I can't read your mind. You wrote a post in a way that would only > be meaningful to someone who had experience with a specific piece of fairly > esoteric test equipment. > > Just because most people have never heard of it, doesn't make it esoteric! Now an Agilent E4980A LCR Meter at $15,000 that's esoteric.
From: Bob Urz on 21 Jan 2007 20:58 Arny Krueger wrote: > "Bob Urz" <sound(a)inetnebr.com> wrote in message > news:1169311899_13943(a)sp6iad.superfeed.net > >>Arny Krueger wrote: >> >>>"BOB Urz" <"sound"@(remove) inetnebr.com> wrote in >>>message news:1169270006_10549(a)sp6iad.superfeed.net >>> >>> >>> >>>>When i can get no rings out of them on the sencore, you >>>>can about guarantee some turns are shorted. >>> >>> >>>That appears to be self-contradictory. >>> >>>Are you trying to saythat even though the coils pass a >>>shorted-turn test, you still think they are too far gone >>>to be worth measuring? > > >>You DON'T understand Arny. > > > Right Bob I can't read your mind. You wrote a post in a way that would only > be meaningful to someone who had experience with a specific piece of fairly > esoteric test equipment. > > > Well , lets see. I said i got no rings, and that about guarantees a shorted turns. You (who obviously doesn't know about ringers), says it appears to be contradictory. So, you obviously thought you knew something about ringers to make your statement "that appears to be self contradictory". If you did no know what a ringer or ring test on a coil was, goggle was a few key strokes away. The proper response would have been, I don't know about how ring tests work. Can you tell me how or supply a link? (which i eventually did). I am milady surprise with your wide knowledge base you did not know how a basic piece of electronic test gear works I see you have not took up my challenge to reverse engineer the coils values. Guess your not up for a challenge today. 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: Arny Krueger on 21 Jan 2007 21:35
"Bob Urz" <sound(a)inetnebr.com> wrote in message news:1169431172_935(a)sp6iad.superfeed.net > Arny Krueger wrote: >> "Bob Urz" <sound(a)inetnebr.com> wrote in message >> news:1169311899_13943(a)sp6iad.superfeed.net >> >>> Arny Krueger wrote: >>> >>>> "BOB Urz" <"sound"@(remove) inetnebr.com> wrote in >>>> message news:1169270006_10549(a)sp6iad.superfeed.net >>>> >>>> >>>> >>>>> When i can get no rings out of them on the sencore, >>>>> you can about guarantee some turns are shorted. >>>> >>>> >>>> That appears to be self-contradictory. >>>> >>>> Are you trying to saythat even though the coils pass a >>>> shorted-turn test, you still think they are too far >>>> gone to be worth measuring? >> >> >>> You DON'T understand Arny. >> >> >> Right Bob I can't read your mind. You wrote a post in a >> way that would only be meaningful to someone who had >> experience with a specific piece of fairly esoteric test >> equipment. > Well , lets see. I said i got no rings, and that about > guarantees a shorted turns. You (who obviously doesn't know about > ringers), says it appears to be contradictory. So, you obviously thought > you knew something about ringers to make your statement "that > appears to be self contradictory". I know that this will make your day Bob, but I've never heard of a shorted-turn tester called a ringer. I said that the usage appeared to be contrdictory for that reason. Therefore your claim that I thought I knew what a ringer was is completely false. > If you did no know > what a ringer or ring test on a coil was, goggle was a few key strokes > away. I just googled "ringer shorted turn" and nothing popped up that was obviously relevant in the first few pages. Ditto for "ring test". |