UTM INDUSTRY audio transformers - from Poland - EU

[HerbertR]

Hello

@igs . Interested to know if you can wind coil former for standardized RM or E series from TDK/EPCOS ?

Best
Zam

Yeah, the same. Any chance to get more replacements for classical Carnhill Inductors like 9048 with the same footprints? Igor, that would be great!

 

[igs]

Hello

@igs . Interested to know if you can wind coil former for standardized RM or E series from TDK/EPCOS ?

Best
Zam

Probably we can do it. Do you have any specifications?

 

[igs]

Yeah, the same. Any chance to get more replacements for classical Carnhill Inductors like 9048 with the same footprints? Igor, that would be great!

Sure, no problem.

 

[zamproject]

Probably we can do it. Do you have any specifications?

No sorry, but probably RM12 or 14 core size, for prototype and small run after that, have a look at datasheet for various core Al and coil former options.

Product catalog: RM cores and accessories

I ask publicly wondering if a custom RM winding service might interest other around if you offer it.
For my particular need I'll come back to you later in private form, it's not a DIY/opensource project.

For more general speaking RM core is used since decades by various audio company, I think about Studer right now, and there is other. IIRC the original footprint/design is by Siemens, but actual mfg like TDK seem to use the exact same standard.

Best
Zam

 

[innercityman]

Would be nice if you produced a power transformer for the LA2A to mount outside the chassis like your UTM7070, with a 3rd secondary 5V for relays and vu meter leds.

 

[JHat]

Hi IGS, Question on the UTM3590B. There are 10 turrets mounted on the top with numbers and a turret that shows as a ground (I think it's a shield). The schematic in catalog 2C shows +10 to 8 and +9 to 7 windings on the primary side with +6 to 3 and +4 to 1 windings on the secondary. What are turret terminals 2 and 5 for? Are they internal shields, or are they left unconnected? Thanks in advance! JH

 

[living sounds]

Hey Igor,

are you selling a transformer like this UTC O-12 or are you planning to?

https://groupdiy.com/threads/1176-input-transformer-comparison.81756/
I would definitely order a few if they sounded this good!

 

[Rob Flinn]

Hello IGS,

I'm still interested to know if you plan on doing an output transformer for the Universal Audio 176/177 with the ratio taps ? See page 19 of attached pdf for more details.

 

[HerbertR]

Got a load of transformers for a Fairchild EQ627 Clone PTP project from UTM today.
Cheers guys....

 

[Ricardus]

Nice. I plan to order some stuff from him as soon as I have some spare cash.

 

[Whoops]

Hi igs,
do you have any transformers for the Pultec?
Input, interstage or output transformers?

Thanks

 

[plovati]

Hey IGS, congrats on the start of your new business! Looks very promising!

I have a question concerning the UTM3590.
How much current can it take?
And the inductace measurements seem to be wrong. They indicate an impedace ratio of 10:1 which seems not to fit to the published ratios. Or do I have my math wrong?

Sorry if these questions already have been answered.

​

Mee too have some question about UTM 3590b datasheet parameters.
Someone have actual measurements of the part ? In particular inductance and resistance of each coil and primary DC current it can witshand.

Thank You

 

[igs]

Mee too have some question about UTM 3590b datasheet parameters.
Someone have actual measurements of the part ? In particular inductance and resistance of each coil and primary DC current it can witshand.

Thank You

Hello Alessandro. These are the parameters. What's wrong with them?
https://utmindustry.com/utm3590b

Universal Audio 176/177

It's too complicated with so many primary taps. No plans right now. Maybe in the future. I'm sorry.

What are turret terminals 2 and 5 for?

They are unconnected and work like a mechanical base for the PCB. I'll upload the drawings shortly.

do you have any transformers for the Pultec?

Yes, we have an input one. There is a plan for the output one soon.

We are celebrating the first year of advertisement today. It was faster than the eye could flick.
You did 31k views of this thread, it's absolutely amazing. It's a big honor for us. Just wanna thank you all.

 

[Ricardus]

We are celebrating the first year of advertisement today. It was faster than the eye could flick.
You did 31k views of this thread, it's absolutely amazing. It's a big honor for us. Just wanna thank you all.

Congrats!

I can't wait to build my next 6 channel API clone with your transformers!

 

[ElevateSonics]

Just chiming in real quick - for a DIY 500 series mic preamp build, I was wondering what the differences between the UTM3503 and UTM3523 would exactly be.
I can kinda read schematics etc. but I have a hard time imagining what actual (sonic and electronic) differences would occur in using either of these two as my output transformer. Any advice is very welcome, thanks in advance everyone!


Quick edit: haven't really paid attention to the low profile to be honest... Still wondering though

 

[Ricardus]

Just chiming in real quick - for a DIY 500 series mic preamp build, I was wondering what the differences between the UTM3503 and UTM3523 would exactly be.
I can kinda read schematics etc. but I have a hard time imagining what actual (sonic and electronic) differences would occur in using either of these two as my output transformer. Any advice is very welcome, thanks in advance everyone!


Quick edit: haven't really paid attention to the low profile to be honest... Still wondering though

The 3503 is like an API 2503, and the 3523 is like an API 2623. Both will work fine in the output of mic preamps and stuff. The API 2503 has an extra set of windings that don't even get used in most circuits. I've been building with the API 2623's lately just to try them out (I have 6 API clones already with 2503's). They're smaller and cheaper since they have less copper, and some people swear by the sonics.

 

[igs]

There is something you've probably been waiting for a long time.

https://utmindustry.com/utm2522

 

[Ricardus]

There is something you've probably been waiting for a long time.

https://utmindustry.com/utm2522

Oooh! Yeah baby!!

 

[ruffrecords]

There is something you've probably been waiting for a long time.

https://utmindustry.com/utm2522

The datasheet says:

Primary Inductance: 1500H
Secondary Impedance: 50H+50H

I think that should be:

Primary Inductance 50H+50H
Secondary Inductance 1500H

Note that in most transformers, inductance varies a lot with frequency, generally being lowest at low frequencies. For a microphone transformer, the inductance at 20Hz is the one that matters.

I cannot seem to find any mechanical data and pin out information for this transformer?

Cheers

ian

 

[igs]

Primary Inductance 50H+50H
Secondary Inductance 1500H

Sure, thanks. It's already corrected.
We'll post the mechanical drawing soon, but it's pin-compatible with API footprint.