SDA SRS 3.1 TL inductor DCR

Ok, I have searched and read and have come up short so I am posting.


https://forum.polkaudio.com/discussion/138234/inductor-dcr-insanity-for-sdas/p2

http://www.jantzen-audio.com/wp-content/uploads/2013/04/Air-Core-Wire-Coil-Values-10.12.2018.pdf

This XO has 4 inductors per board.
The 22 gauge 0.3mH has a DCR of 0.544
The 18 gauge 1.0mH has a DCR of 0.7

Does anyone have the values for the 18 gauge 1.25mH?

Then I learned there was an A and a B version with one using 20 gauge and the other 22 gauge for the large 18mH. Any suggestion for this? The jantzen C coil design looks affordable if it is an ok application?

Thanks if anyone knows where the missing values would be published.

Comments

  • honestaquarianhonestaquarian Posts: 2,424
    @VR3
    @westmassguy
    @gimpod
    @DarqueKnight
    @F1nut
    Any of them might have the information you need or could send you in the right direction.
    Living room Home theater: Upgrade Company modified Onkyo PR-SC5509,Sunfire Cinema grand Signature 5 channel amp(1st gen),Carver TFM-45,Carver M-400a,Panasonic TC-P50ST60 50" Plasma(last gen before Plasma production stopped)Pioneer Elite DVL-91,Meridian 519 Dolby AC-3 RF Demodulator,Oppo Digital UDP-205,TiVo Bolt VOX,Nakamich BX-300,Technics SL-1200MKII,Shure V15 Type VxMR cartridge,Polk SDA-SRS 3.1 TL(with RD-0198 tweeters, upgraded with Larry's rings, black hole5,an Avel-Lindberg 1000VA isolation transformer, VR3 customer crossovers and internal wiring),Polk CS-1000P(with SL-6506 tweeter),Polk Monitor 5jr(with RD-0194 tweeters),Polk RT-35i (1),Polk Mini Monitors,Polk PSW150(4)Monster Power HTPS 7000 MKII Signature series,Monster Power AVS 2000 Signature Series,Various MIT,Monster,Upgrade Company and Belden interconnect,power,HDMI,Coax and Toslink Digital and speaker cables.

    Bedroom 2 channel system:Integra DTM 40.4,Nakamichi BX-100,TiVo mini,Musical Fidelity X-LPS,X-PSU,Carver TFM-25,Sony KV-34XBR970(last of the widescreen tube sets before production stopped)Technics SL-1200MKII,Shure V15 Type V MR cartridge,Polk RT-55(with SL-6506 tweeters),Polk PSW-200 in plexiglass(2),Sony Playstation 3 slim.Monster Power HTPS-7000,Monster AVS-2000, PowerVarious Kimber,Audioquest and MIT interconnects and speaker cables.
  • DarqueKnightDarqueKnight Posts: 6,510
    edited May 30
    @VR3 has just completed a 3.1TL crossover build.

    https://forum.polkaudio.com/discussion/186706/3-1tl-build#latest
    Post edited by DarqueKnight on
    "So hot it burns Mice!"~DK
    "Polk SDA-SRSs are hopelessly out of date both sonically and technologically... I see no value whatsoever in older SDA speakers."~Audio Asylum Member
    "Knowledge, without understanding, is a path to failure."~DK
    "Those who irrationally rail against something or someone that is no threat to them, actually desire (or desire to be like) the thing or person they are railing against."~DK
  • VR3VR3 Posts: 23,217
    1.2TL
    1MH 18awg 000-1239 Air Core
    2MH 20awg 000-1062 Air Core
    .4MH 22awg .598 DCR 000-1171 Air Core
    .7MH 24awg 1.25 DCR 000-1046 Air Core
    16MH 14 Awg .16 DCR 000-6577 C-Coilf60ocmcgl3xs.png

    SDA SRS
    .4MH 22awg .598 DCR 4 000-1171 Air Core
    .7MH 24awg 1.25 DCR 2 000-1046 Air Core
    2.7MH 18awg .92 DCR 4  000-1307 Air Core
    16MH 14 Awg .16 DCR 2 000-6577 C-Coil
    xxzxbzzkvfce.png

    3.1TL
    .3MH 22 Awg .5 DCR 2 000-1454 Air Core
    1.25MH 18 Awg .48 DCR 2 000-1626 Air Core
    1 MH 18 Awg .48 DCR 2 000-1239 Air Core
    18 MH 14 Awg .17 DCR 2 000-6595 C-Coil
    nkuhm3kifbdx.png

    Polk Audio SDA 2.3
    0.4 22 awg 000-1171 4 Air Core
    2.5 22 awg 000-1119 2 Air Core
    1.25 18 awg 000-1626 2 Air Core
    16.8 14 awg 000-6579 2 C Coil
    gy5i82otg5tq.png


    - Not Tom

    Vr3Mods.com ///// Version3Audio.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
  • cincycat13cincycat13 Posts: 845
    VR3...thanks so much!

    It's been a number of years since I did my 2.3 with sonicaps and gimpod boards. It will make it simpler if I dont have to tear apart the current boards to start the project so I can take my time.

    Now I just have to decide of brand of caps and gimpod board or point to point. The sonicap / board method may be more my speed.
  • westmassguywestmassguy Posts: 6,345
    cincycat13 wrote: »
    VR3...thanks so much!

    It's been a number of years since I did my 2.3 with sonicaps and gimpod boards. It will make it simpler if I dont have to tear apart the current boards to start the project so I can take my time.

    Now I just have to decide of brand of caps and gimpod board or point to point. The sonicap / board method may be more my speed.

    Tony's boards make it real easy.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
  • JayCeeJayCee Posts: 429
    @VR3

    Hey Trey,

    You still a Jantzen reseller? If so, I'd like to send some business your direction vs. Parts Express...always nice to keep it in the CP family ;).

    Picked up a pair of 3.1tl's a few weeks ago and am redoing XO's. Would like to order a full inductor set if you're still able to do so. Please shoot me a PM if it's doable.

    Thanks,

    John
    Speakers: Polk1.2tl's (Uber Mods) Pre/Amp/DAC: PS Audio BHK Signature & 250, Perfectwave DirectStream Cables/IC's: MIT S1Bi-Wire/S1 Balanced +Avel Lindberg 1000VA "Dreadnought" Power Conditioner: Core Power Technologies EQUI=CORE 1800 Power Cords: Core Power Technologies Gold, DH Labs Power Plus DIY w/Neotech NC-P301 & P311ends FLAC Streamer: Roon ROCK on wifi'd NUC⟿Ω☯☥☮⟿🔊♩♪♫♬♩♪♫♬♩♪♫♬
  • VR3VR3 Posts: 23,217
    I currently source my inductors from hificollective, they give resellers a small discount but not enough for me to take orders. Their prices were actually similar to what parts express was giving to commercial, but that was a long while ago I compared the pricing.

    Thank you for the thought though 😊
    - Not Tom

    Vr3Mods.com ///// Version3Audio.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
  • JayCeeJayCee Posts: 429
    VR3 wrote: »
    I currently source my inductors from hificollective, they give resellers a small discount but not enough for me to take orders. Their prices were actually similar to what parts express was giving to commercial, but that was a long while ago I compared the pricing.

    Thank you for the thought though 😊

    Was worth a try. Thanks for the reply.
    Speakers: Polk1.2tl's (Uber Mods) Pre/Amp/DAC: PS Audio BHK Signature & 250, Perfectwave DirectStream Cables/IC's: MIT S1Bi-Wire/S1 Balanced +Avel Lindberg 1000VA "Dreadnought" Power Conditioner: Core Power Technologies EQUI=CORE 1800 Power Cords: Core Power Technologies Gold, DH Labs Power Plus DIY w/Neotech NC-P301 & P311ends FLAC Streamer: Roon ROCK on wifi'd NUC⟿Ω☯☥☮⟿🔊♩♪♫♬♩♪♫♬♩♪♫♬
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