RT3000P Crossover
Comments
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0.29 ohm is definitely close enough to 0.3 ohm. Most meters don't even go down into the .01 ohm range, even my $200 meter will read .29 as .3 ohm. I have to use DATS to get a more accurate reading.Polk_Denon wrote: »
Even then most parts labeled "0.3 ohm" will measure between .29 and .31ohms anyhow."One great object of the Constitution was to restrain majorities from oppressing minoritites or encroaching upon their just rights."
-James K. Polk, 11th President of the United States -
With the inductors, two of the originals are laminated steel core. Should they be kept the original type or can they be changed to air core? Do the different type of inductors have any affect to sound? Or is it more important on the quality of the wire used to make them?
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Generally, in order to get close to the original DCR, you need to match the type (iron or air core) and the gauge of the wire used.Alon Petite / Infinity 1.2S / Coda Continuum / Counterpoint SA5000 / Oppo BDP-105D / Technics SP-15 w/SAEC WE-308SX & Ortofon AS-309 arms / Ikeda 9C2 & Dynavector XX2 Mk II carts
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Iron core generally will have much smaller gauge wire then the air core equivalent- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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With an iron core inductor the amount of inductance can change as a function of the AC current applied. So, depending upon how the inductor is being used the frequency response of the crossover could change with different playing volumes. This doesn't happen with an air core version.
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So a place that makes inductors should be able to make air cores with the correct DCR I need? I did find an air core with the 1.0mh DCR .30 that matches the original. I’d like to use air cores for all 3
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Hifi collective- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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Hifi collective
Emailed them few days ago and they gave me links to ones of same style(Jantzen) with close DCRs but not exact. -
As long as it's within 5% you should be fine- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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Think found a place that will make air cores for me but before send them info want to make sure I’m reading schematic correct. The 3.0mh DCR is 1.25? The .2mh. & 1.0mh are both .3 DCR
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That is what the schematic calls out. Like others have said, even if you custom order they will likely be plus or minus 5%, as is called out on the schematic also."One great object of the Constitution was to restrain majorities from oppressing minoritites or encroaching upon their just rights."
-James K. Polk, 11th President of the United States -
Place emailed me back. Don't think custom made but here is what they have. Would these be within +-5%?
.2mh dcr .178 (18 gauge wire)
3.0mh dcr .927 (18 gauge wire)
1.0mh dcr .471 (18 gauge wire)
What's on schematic:
.2mh dcr .3
3.0mh dcr 1.25
1.0mh dcr .3
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You need like 20 awg first two and 16 or 14awg lady one- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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You need like 20 awg first two and 16 or 14awg lady one
on parts express I found
.2mh dcr .29 (20g wire)
3.0mh dcr .99 (18g wire) or 3.0mh dcr 1.38 (20g wire) doubt either of these are +-5%
1.0mh dcr .3 (15g wire) exact match as original -
Jantzen makes a 19 awg inductor for the 3mh- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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Jantzen makes a 19 awg inductor for the 3mh
Do you have a link for it? I looked on the jantzen spreadsheet for all the ones they make and don't see a 19awg -
- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
