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Project Specific Discussions => Magnetics => Topic started by: BluegrassDan on March 24, 2020, 09:50:18 PM

Title: 1:5 mic pre input transformers
Post by: BluegrassDan on March 24, 2020, 09:50:18 PM
Okay guys. I'm really liking the sound of the Cinemag 1:5 mic pre input transformer on my tube preamp. It seems to be middle of the road in terms of hi-fi with a hint of coloration.

Just out of curiosity, do you all have any other 1:5 recommendations? For example, going in both directions toward either neutral or colored. It would be nice to have a couple options for either super-fast transients versus big, fat vintage.

Anything that's off the beaten path and lesser known? Would need to be modern production and available.
Title: Re: 1:5 mic pre input transformers
Post by: L´Andratté on March 25, 2020, 06:55:46 AM
This one:https://groupdiy.com/index.php?topic=64069.msg811214#msg811214 (https://groupdiy.com/index.php?topic=64069.msg811214#msg811214)
Very simple dicrete mic pre, low noise, beautifully coloured sound!
(It´s not a fuzz box, you can make clean recordings with it too)
Title: Re: 1:5 mic pre input transformers
Post by: rackmonkey on March 26, 2020, 03:36:01 AM
Jensen makes the JT-13k7-A. They also make a 1:4.8 input called JT-13k6-c.

Edcor makes a 1:5. No can on that one. You’d have to shield it yourself.

Sowter has one or two as well, One is a 1+1:5 (9045).

OEP may have one, Never bought any of their stuff.

As far as modern production, “off the beaten path”, I got nothin.
Title: Re: 1:5 mic pre input transformers
Post by: RuudNL on June 07, 2020, 01:04:14 PM
I have been using Sennheiser TM003 transformers with great success in the past. (1:2.5 or 1:5)
Title: Re: 1:5 mic pre input transformers
Post by: Winston O'Boogie on June 07, 2020, 01:23:04 PM
There's also Lundahl.  Having said that, your CMMI-5C is a nice choice.
Title: Re: 1:5 mic pre input transformers
Post by: rackmonkey on June 11, 2020, 12:23:01 PM
Here's a different one for you, Dan. Check out the post in Magnetics about the A-10 clone from Crimson. They can customize a 1:5 based on the A-10 design for about $75 in singles. Probably cheaper in quantity.

You could also check out their standard input. I think 1:10 and 1:8 are stock options, but I'm betting 1:5 would be the same price.

Just a thought
Title: Re: 1:5 mic pre input transformers
Post by: BluegrassDan on June 12, 2020, 01:19:13 AM
Here's a different one for you, Dan. Check out the post in Magnetics about the A-10 clone from Crimson. They can customize a 1:5 based on the A-10 design for about $75 in singles. Probably cheaper in quantity.

You could also check out their standard input. I think 1:10 and 1:8 are stock options, but I'm betting 1:5 would be the same price.

Just a thought

That does seem very interesting. Thanks for the lead!