Natural

line to mic level using Neutrik NTE10/3 transformer
« on: May 18, 2020, 02:19:16 AM »
Hi there,

i would like to convert Line level audio to mic level using a transformer to protect my camera. witch is battery powered in contrast to the audio gear.

i found some schematics and would like to know how it's done correctly using the Neutric NTE10/3, witch i have bought in an impulse.

https://www.soundcardpacket.org/7cablerx.aspx


it's the first time i'm using a transformer in the audio biznis, don't know much about it.
did someone tried this?

kind regards and thanks in advance.

« Last Edit: May 18, 2020, 03:23:41 AM by Natural »


abbey road d enfer

Re: line to mic level using Neutrik NTE10/3 transformer
« Reply #1 on: May 18, 2020, 05:50:22 AM »
i found some schematics and would like to know how it's done correctly using the Neutric NTE10/3, witch i have bought in an impulse.
You could have done worse... :)

Quote

did someone tried this?
Yes.

That should work; the only risk is, if the line level is excessive, saturating the transformer. You may need an attenuator, such as this
https://www.thomann.de/fr/jts_ma_123.htm?glp=1&gclid=CjwKCAjw5Ij2BRBdEiwA0Frc9ebx97n9gPRNZ_m1sg2HgKS11ZTzAiUVHvcitLsMfan9EOBkcjmiWxoC8TkQAvD_BwE
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Natural

Re: line to mic level using Neutrik NTE10/3 transformer
« Reply #2 on: May 18, 2020, 03:43:39 PM »
Hey thnx for your reply.

how about this?

taken from:
https://www.soundcardpacket.org/7cabletx.aspx

well the line level input is no problem, i can use opamps and reduce the gain.
as my gear is 10 v.p.p., but i can't have opamp or any parts powered by my gear on the secondary side.
i wanna protect the camera witch is battery powered.

i bought that Neutrik transformer in an impulse and i wanted to know if that type/model does the job.
https://www.neutrik.com/en/product/nte10-3

it's center tapped, being 10K on 1 side and 50K on the other.
witch should i use?

i don't know anything or little about transformers in the audio world.

kind regards

analogguru


Natural

Re: line to mic level using Neutrik NTE10/3 transformer
« Reply #4 on: May 18, 2020, 05:48:39 PM »
well, i'm building a DIY modular synthesizer.

i have reduced the gain from 10 v.p.p. to line level using 3.5 mm jacks, i don't have anything with XLR jacks, yet.

https://befaco.org/docs/Out/Output_V3_Schematic.pdf

now i'm trying to build a "thing" to convert line level to mic level ... so my camera can record the audio as it has a mic input and doesn't get destroyed. the producer of the camera tries you to sell a 650€ adapter.


Sony ECM-DS70P - Portable Stereo Condenser Microphone.
Electret Condenser Technology.

witch should be the same as ...

https://www.conrad.nl/p/microfoonkapsel-1-10-vdc-frequentiebereik100-hz-8000-hz-c9767ed423lf-302155?WT.mc_id=gshop&gclid=CjwKCAjw5Ij2BRBdEiwA0Frc9QG4L6VRnjbCIQI5TLXPBFctiBUPlSYmsu0aNbjS0lF3P-dzMEDWUhoCQ8oQAvD_BwE&gclsrc=aw.ds&tid=1578107505_66447429024_pla-356257857727_pla-302155&WT.srch=1&vat=true&insert_kz=8J

i haven't done any tests with a 3.5 mm jack into the camera and scope it.

the camera records fine, but you have to be quiet.
now i'm exploring a new area and i don't know much about impedance of the mic input .. and the neutric NTE10/3 transformer is on it way.





 



abbey road d enfer

Re: line to mic level using Neutrik NTE10/3 transformer
« Reply #5 on: May 18, 2020, 07:42:07 PM »
how about this?

taken from:
https://www.soundcardpacket.org/7cabletx.aspx
This can work, yes, but since you have the Neutrik xfmr, you should use it, as it is a better solution..

Quote

i wanna protect the camera witch is battery powered.
Don't worry about it.

Quote
i bought that Neutrik transformer in an impulse and i wanted to know if that type/model does the job.
Yes it does.

Quote
it's center tapped, being 10K on 1 side and 50K on the other.
Not exactly center-tapped. If it was, it would be 50k and 12.5k.

Quote
witch should i use?
Use the 50k connection.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.


 

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