Are there any large format 12:1 transformers for C12-like circuits?

trans4funks1 · Feb 19, 2015

I am curious to learn if there is a source for a large format transformer that may serve as an alternative for the AMI T14 or Cinemag CM-13114.

It seems like it would be fun to try something like that just to satisfy a curiosity, so I looked around but didn't find any vendors that have them available for off the shelf sale.

Does anyone know of a source?

gyraf · Feb 19, 2015

I'm pretty sure that Lundahl has some in their list - http://www.lundahl.se/our-products/microphones/ - e.g. LL1636 1+1+1+1:10+10, that you can wire for 12:1 with a bit of creativity..

the LL7905 looks like a candidate also..

Jakob E.

..no I don't get a commission from them, although I should probably ask about that

trans4funks1 · Feb 19, 2015

Thank you for the suggestion Jakob.

OPR · Feb 19, 2015

There is also The Samar Audio design transformers 8)
I made some comparisons with the ami and IOaudio a while ago
see link

http://groupdiy.com/index.php?topic=58091.0

trans4funks1 · Feb 20, 2015

Thanks for the info about the SAMAR.

micaddict · Feb 20, 2015

I was shocked when I heard the Samar in the C12 circuit.

Oh, and that is meant in a positive way.

Henk

trans4funks1 · Feb 22, 2015

Does anyone have a photo of the AMi T14 (or Cinemag -13114) and the SAMAR 12:1 displayed side by side for size comparison?

The description at SAMAR's website describes the transformers as being sized as drop in replacements for many import mics. I have been imagining that a large format transformer for a C12 application would be nearly twice as large as the T14 shape.

Thank You.

micaddict · Feb 22, 2015

trans4funks1 said:
Does anyone have a photo of the AMi T14 (or Cinemag -13114) and the SAMAR 12:1 displayed side by side for size comparison?

The description at SAMAR's website describes the transformers as being sized as drop in replacements for many import mics. I have been imagining that a large format transformer for a C12 application would be nearly twice as large as the T14 shape.

Thank You.

OPR posted a link.
Look at the top photo.

MicDaddy · Feb 22, 2015

trans4funks1 · Feb 22, 2015

I thought that was a I/O Audio Bv next to a AMI T14.

Is the larger transformer shown a SAMAR 12:1?

Is it the same CT12 described here?: http://www.samaraudiodesign.com/BobbinTransformers.html or is it a special large sized item that SAMAR makes on request?

Thank You.

MicDaddy · Feb 22, 2015

Is there a mounting hole in those lams? At the corners or down the middle? OPR have a top view?

OPR · Feb 22, 2015

Is the larger transformer shown a SAMAR 12:1?

Is it the same CT12 described here?: http://www.samaraudiodesign.com/BobbinTransformers.html or is it a special large sized item that SAMAR makes on request?

Thank You.

These are different to the Ct12 as they have a bigger core...best to email or PM Marik for more details.

trans4funks1 · Feb 23, 2015

Thank You for explaining.

Marik · Feb 23, 2015

trans4funks1 said:
I thought that was a I/O Audio Bv next to a AMI T14.

Is the larger transformer shown a SAMAR 12:1?

Is it the same CT12 described here?: http://www.samaraudiodesign.com/BobbinTransformers.html or is it a special large sized item that SAMAR makes on request?

The CT12 are different--those are single bobbing transformers and were designed to fit Chinese microphone bodies (MXL2001, and alike). The new series of transformers are dual bobbin and are not on our website, yet. They are larger and of much higher quality and specs. They wound in sections (like original BV8), have very low DCR and excellent low end overloading characteristics.

Best, M

trans4funks1 · Feb 23, 2015

Thank You Marik.

I'm very interested in your new transformer. I hope you will post some dimensional measurements so I can consider how it will fit in a mic body.

micaddict · Feb 24, 2015

I did wonder why you guys weren't all over this one.
Well, it seems the cat is out of the bag this time.
High on my wish list, too.

Henk

shaggy · Feb 24, 2015

Marik said:
trans4funks1 said:

I thought that was a I/O Audio Bv next to a AMI T14.

Is the larger transformer shown a SAMAR 12:1?

Is it the same CT12 described here?: http://www.samaraudiodesign.com/BobbinTransformers.html or is it a special large sized item that SAMAR makes on request?

Click to expand...

The CT12 are different--those are single bobbing transformers and were designed to fit Chinese microphone bodies (MXL2001, and alike). The new series of transformers are dual bobbin and are not on our website, yet. They are larger and of much higher quality and specs. They wound in sections (like original BV8), have very low DCR and excellent low end overloading characteristics.

Best, M

Just want to second trans4funks1 request for a mounting profile and dimensions, please Marik - thanks!

Dave (shaggy)

MicDaddy · Feb 24, 2015

Hi Marik, What is the alloy/size of the lams? If it's asking too much disregard 8)

Marik · Feb 25, 2015

Here are the transformer dimensions. We use 80% Ni lamination.

Best, M

trans4funks1 · Feb 25, 2015

Thanks for sharing the dimensions Marik.

Are there any large format 12:1 transformers for C12-like circuits?

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