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  1. #1

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    Default AI-1 1000va Questions

    Curious what bolt you members used to secure your transformer to one of Larry's cases?

    I'll be putting mine together soon.

    Also, is there mention somewhere regarding how to properly wire the transformer?

    Thanks

  2. #2

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    the schematic is on DKs page, let me take a look.\

    http://www.polkaudio.com/forums/show...VA-Transformer
    Last edited by thsmith; 02-01-2013 at 10:21 PM.
    Speakers: SDA-1C (most all the goodies)
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  3. #3

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    Use non-magnetic hardware, I used stainless steel.

    Yellow/Red - right pin
    Black/Orange - right blade
    Grey/Brown - left pin
    Blue/Violet - left blade
    'Political Correctness'.........defined

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    I have a question. My SDA 1C's were originally pin/blade and the IC has been modified by using a banana plug and a Vampire input jack so the blade side is no longer hooked up. Can I just run the appropriate connection from each side of the transformer to the negative speaker terminal? That achieves the same effect as changing the IC connector and re-wiring internally, correct?

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  5. #5

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    Quote Originally Posted by thsmith View Post
    the schematic is on DKs page, let me take a look.\

    http://www.polkaudio.com/forums/show...VA-Transformer
    Thanks for that link. I did look on there but may have missed it. Evidently again as I just checked. That's what semi prompted my post.

    Quote Originally Posted by F1nut View Post
    Use non-magnetic hardware, I used stainless steel.

    Yellow/Red - right pin
    Black/Orange - right blade
    Grey/Brown - left pin
    Blue/Violet - left blade
    Thanks!!!!

    Exactly what I was looking for. And good tip on the stainless hardware.

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    Correct!!
    Hot Rodded SDA 1.2TL's, SDA 1C's, SDA CRS+'s...
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  7. #7

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    Quote Originally Posted by heiney9 View Post
    I have a question. My SDA 1C's were originally pin/blade and the IC has been modified by using a banana plug and a Vampire input jack so the blade side is no longer hooked up. Can I just run the appropriate connection from each side of the transformer to the negative speaker terminal? That achieves the same effect as changing the IC connector and re-wiring internally, correct?

    H9
    If I understand correctly, that is what I did as i had went to cardas BP for my IC cable.
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs

    Ofc: Wright WLA12 preamp: Anthem Amp 1: Pio Elite DV-79AVI: Airport Express: CAL Sigma II DAC: PA LS90 sonicaps and mills

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    I had a tough time finding the proper size stainless steel bolt when I was assembling mine. I finally found one at a marine hardware store on the coast, but probably any good size place that sells boats, etc. would have a good selection.

    Re: connecting the "blade" part of the SDA cable to the negative speaker terminal, that's what I did too. Works great!
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills, polyswitches removed, Lg Solen inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR binding posts, upgraded IC Cable, Black Hole Damping Sheets (3" strips) installed on back wall behind MW's & Tweeters, interior of cabinets sealed, AI-1 interface with 1000VA transformer

  9. #9

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    Quote Originally Posted by drumminman View Post
    I had a tough time finding the proper size stainless steel bolt when I was assembling mine. I finally found one at a marine hardware store on the coast, but probably any good size place that sells boats, etc. would have a good selection.

    Re: connecting the "blade" part of the SDA cable to the negative speaker terminal, that's what I did too. Works great!
    Marine? Boats? Woah... I was just going to go to my local Home Depot/lumber store to find something.

    What size of bolt did you use?

  10. #10

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    Home Depot doesn't have stainless steel bolts. I got mine at the local Ace Hardware. The size I used was 5/16-18 x 3.5 inches.
    'Political Correctness'.........defined

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  11. #11

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    Don't recall the size, I just matched the size of the bolt that came with the 800va transformer. Got stainless steel from the local hardware store.
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.

  12. #12

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    Default Question re non-magnetic bolts for Dreadnoughts

    Quote Originally Posted by F1nut View Post
    Use non-magnetic hardware, I used stainless steel.
    F1Nut,

    What are the consequences or drawbacks to using a standard bolt? I have two boxes assembled, and I used standard (Home Depot) bolts in both.

    Do I need to change them out ASAP?

    I can access SS hardware from Jamestown Distributors on the Internet, if it isn't available in a local hardware or marine supply store.
    Last edited by Moose68Bash; 02-04-2013 at 12:49 PM.

  13. #13

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    The magnetic field would most likely be affected by steel hardware.
    'Political Correctness'.........defined

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  14. #14

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    Quote Originally Posted by F1nut View Post
    Home Depot doesn't have stainless steel bolts. I got mine at the local Ace Hardware. The size I used was 5/16-18 x 3.5 inches.
    Also not all Stainless is non-magnetic so check with a magnet. Most stainless made overseas IS magnetic. so double check.

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    Quote Originally Posted by pitdogg2 View Post
    Also not all Stainless is non-magnetic so check with a magnet. Most stainless made overseas IS magnetic. so double check.
    I took a refrigerator magnet to the hardware store - guarantees you buy the correct SS bolt
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills, polyswitches removed, Lg Solen inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR binding posts, upgraded IC Cable, Black Hole Damping Sheets (3" strips) installed on back wall behind MW's & Tweeters, interior of cabinets sealed, AI-1 interface with 1000VA transformer

  16. #16

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    Quote Originally Posted by pitdogg2 View Post
    Also not all Stainless is non-magnetic so check with a magnet. Most stainless made overseas IS magnetic. so double check.
    I took a refrigerator magnet to the hardware store - guarantees you buy the correct SS bolt

    From a quick google search non magnetic SS formulations includes 18-8 (most variations), 304 & 316.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills, polyswitches removed, Lg Solen inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR binding posts, upgraded IC Cable, Black Hole Damping Sheets (3" strips) installed on back wall behind MW's & Tweeters, interior of cabinets sealed, AI-1 interface with 1000VA transformer

  17. #17

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    Aluminum bolts 3/8-16

    I drilled out the center hub of the transformer. Not going to hurt it any..
    Hot Rodded SDA 1.2TL's, SDA 1C's, SDA CRS+'s...
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  18. #18

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    Quote Originally Posted by F1nut View Post
    Home Depot doesn't have stainless steel bolts. I got mine at the local Ace Hardware. The size I used was 5/16-18 x 3.5 inches.
    Different selection in our stores. However, there are lots of places to go for hardware.

    Thanks for listing bolt size guys. Fridge magnet is a great tip...

  19. #19

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    Just ordered stainless steel (18/8) bolts, nuts and washers from <www.boltdepot.com>.

    They have a great selection of all sorts of fasteners, and its less expensive than driving 15 miles to the nearest REAL hardware store.
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