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Old 14th May 2007, 05:40 AM   #1
smort1 is offline smort1  Australia
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Default Anyone built Acoustat interface ???

Has anyone built or is building an Acoustat interface?

I have a pair of panels without interfaces and would like to get them going. Finding out the actual required transformer specs would be great!

Many thanks in advance of any advice or leads
All the best
Steve
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Old 14th May 2007, 09:57 PM   #2
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The only one worth considering is the two transformer 121 type.

I don't have my info handy, but the principle, and maybe the wind ratios are to be found in the original patent(s). Should be easy enough to find in a patent search.

One xfmr is high ratio, the other low. Iirc, the high ratio is the "bass" xfmr, and the low ratio is the HF xfmr. The circuit is simple.

You need xfmrs with good freq response especially for the HF version.
The "medallion" version, I have been told used better core material, maybe even permalloy, but I doubt that.

The response of the xfmrs overlaps by at least 3-4 octaves, fyi.

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Old 15th May 2007, 06:58 AM   #3
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Default yes you can...

buy factory spec designed new transformers to make the interface. don't have the specific details at my finger tips right now but the bass transformer will cost you $250.00 each with a lead time of about 4 - 6 weeks, the high frequency transformer is less. Use a switching supply for the HT supply.
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Old 15th May 2007, 07:03 AM   #4
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Default lots of info here...

start with the stock supply design and you can modify from there.

http://www.izzy-wizzy.com/audio/spkr.html
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Old 16th May 2007, 08:13 AM   #5
smort1 is offline smort1  Australia
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Hi Bear and Moray,

Thanks for your kind advice.

So I should hang out for the 121 tranformer and not say the 143 transformer that is currently on ebay ? (#110127672311)http://cgi.ebay.com/ACOUSTAT-TTA-143...QQcmdZViewItem

I was talking to a local toroidal manufacturer who can probably make me some copies with amorphous donuts if I can get my hands on one to copy

What would be your advice?

Many thanks
Steve
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Old 16th May 2007, 10:19 PM   #6
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Default wait for the 121's nt.

nt
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Old 7th June 2007, 03:13 PM   #7
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Default Galaxy Transformes...

http://www.galaxytransformers.com/ They can build you factory spec Acoustat transformers these are the real deal.
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