[zilch0md]

Hi Willco,

You don't have to read very far into this thread to discover that several companies manufactured essentially identical products. The original design changed hands several times over the years.

 

[shyamwanne]

My Topaz and cases are sold. I still have Synergistic Research Blue fuse ($100), and Black Duplex Outlet ($175) for sale though.

 

[zilch0md]

Cool!

For specs, see: http://www.pacificparts.com/vends/mge/images/t1.pdf

 

[mourip]

I just finished putting a Topaz “Series 30” 500VA low inter-winding capacitance transformer into this nice box that I purchased from a fellow HFer. Worked out well and looks good.

 

[zilch0md]

^ Well done, Mourip! It's beautiful. And those are great photos, too!

 

[doraymon]

Guys, any idea where I can find a Topaz series 30 or equivalent.
Nothing on e-bay and many manufacturers don't indicate the capacitance value.

 

[zilch0md]

Guys, any idea where I can find a Topaz series 30 or equivalent.
Nothing on e-bay and many manufacturers don't indicate the capacitance value.

https://www.ebay.com/itm/TRANSFORME...780338?hash=item3f9d868c72:g:~IsAAOSwirFbAZLG

https://www.ebay.com/itm/MGE-UPS-Sy...559391&hash=item35db9ee7b3:g:u58AAOSwewJTmJGr

https://www.ebay.com/itm/MGE-UPS-TR...671993?hash=item2c87c936f9:g:eEQAAOSwI~VTzVtB

Hint: Topaz = Eaton = MGE = Daitron

Keep searching. They are out there.

Mike

 

[Willco]

https://www.ebay.com/itm/TRANSFORME...780338?hash=item3f9d868c72:g:~IsAAOSwirFbAZLG

https://www.ebay.com/itm/MGE-UPS-Sy...559391&hash=item35db9ee7b3:g:u58AAOSwewJTmJGr

https://www.ebay.com/itm/MGE-UPS-TR...671993?hash=item2c87c936f9:g:eEQAAOSwI~VTzVtB

Hint: Topaz = Eaton = MGE = Daitron

Keep searching. They are out there.

Mike

The Eaton is not the same as the Topaz. It’s inter winding capacitance is much higher! The difference, as I recall, as told to me by the engineers at Eaton is .9 on the Eaton compared to .0005 on the Topaz. So be careful to check the specs on these different transformer models.

 

[oneguy]

Guys, any idea where I can find a Topaz series 30 or equivalent.
Nothing on e-bay and many manufacturers don't indicate the capacitance value.

I am seeing 8 available on eBay right now. 4 under the Topaz brand and 4 under the MGE brand.

 

[zilch0md]

Hi Willco,

Even Topaz isn't the same as Topaz, in terms of capacitance - there are several models that exceed 0.0005 pF. You may be right about Eaton, but I'm pretty sure there was a time when Eaton was manufacturing the .0005pF -31 and -32 models that look just like those made by Topaz, MGE, Daitron and, let me add, Elgar and Xentek.

I recommend not ruling out any of these names when searching for isolation transformers and, as you have advised, always check the specifications.

 

[Zenvota]

Id like to add for those searching for units, searching for the specific model numbers is an option as well, as thats how companies like radwell/plccenter list their units. I.e. 91097-32 for the 750va unit .0005 with cord and outlet.

-11 has terminals, -12 has a cord and outlet
-11 is .005, -22 is .001, -32 is .0005

Heres a list of the models, https://cdn.head-fi.org/a/9986070.jpg

Also just searching ebay for ultra isolation or extreme isolation

The xenteks have different model numbers like eit55-03, i couldnt find a list but they seem to all be .001, except for that magical .000001

Other manufacturers include: deltec,
Utc, eca, schneider, square d

Theres a much larger inventory out there then you might expect theres just no consistency with listing keywords

 

[Zenvota]

Hoping maybe someone here has some insight or an opinion on what im doing.

I'm splitting the signal out of my dac, currently with emotiva xbal splitters to a bass shaker system comprising of an equalizer, crossover, and amplifier. See below for system specs.

Im trying to decide how best to split and power the system with an iso transformer. I'm mulling over the following options:

1.) Iso Transformer to power strip with everything, split with emotiva xbal
1b.) Split with bluejeans xlr splitters

2a.) IT to 2 separate cables to dac and amp; split with xbals, jensen iso max on the shaker side isolating that system.
2b.) Split with bluejeans xlr splitters and a use a jensen iso max.
2c.) Split with whirlwind imp splitters

The emotiva xbal splitters are on pcb if that makes any difference.

Im not sure if using the whirlwind splitters or the jensen iso max allows you to power the system separately from the iso transformer, but i do believe zilch mentioned them in the op and someone mentioned using them to power their subwoofers separately from a topaz.



P.S. System Details:
Source: windows computer evga p1200 p2 psu
Uptone iso regen and lps 1.2
Dac: audio gd nfb7, input is amenero with usb isolator
Headamp: audio gd nfb1amp
Currently just using monoprice premier xlr cables and emotiva xbal splitters
And 14awg standard tripplite power cables and a ge surge strip.

The shaker system is a monoprice dual 31 band graphic equalizer, art310 crossover, little kinter stereo amp.

Also on the same outlet but not used at the same time is a denon x4200w, audiosource amp100vs, bic v1220.

 

[Alcophone]

Id like to add for those searching for units, searching for the specific model numbers is an option as well, as thats how companies like radwell/plccenter list their units. I.e. 91097-32 for the 750va unit .0005 with cord and outlet.

-11 has terminals, -12 has a cord and outlet
-11 is .005, -22 is .001, -32 is .0005

Heres a list of the models, https://cdn.head-fi.org/a/9986070.jpg

Also just searching ebay for ultra isolation or extreme isolation

The xenteks have different model numbers like eit55-03, i couldnt find a list but they seem to all be .001, except for that magical .000001

Other manufacturers include: deltec,
Utc, eca, schneider, square d

Theres a much larger inventory out there then you might expect theres just no consistency with listing keywords

Is there seriously nothing like it still in production? I find that bizarre if they are so great (which I'm not doubting).

 

[doraymon]

Is there seriously nothing like it still in production? I find that bizarre if they are so great (which I'm not doubting).

+1 I always thought this was crazy!

 

[Superdad]

Is there seriously nothing like it still in production? I find that bizarre if they are so great (which I'm not doubting).

Well the home audio system use was never the target market for the industrial Topaz isolation transformers. And while large (10kVA+) transformers are still used in some commercial installations, I think the market for smaller units has gone away as the gear they were used for has evolved in the modern age.