TillM



TillM

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #421 on: October 30, 2018, 08:17:32 PM »
So i find finally the mistake.
Today I check my mic with the working mic I sold to my friend.
I just check the resistance with my DMM.
In Pin 3 and 7 i realized that the working mic shows 0,8 ohm and the faulty mic goes up and up.
I connected pin 3 with the mic body, cause with my old mic it works great.
I don’t know why it don’t work with the Aputis body, but the fix was, to connect pin 3 with the pin 7 from the connector (as mentioned in the guide from Dan).
Now everything works like it should !
Thanks to everybody for your help.
« Last Edit: October 30, 2018, 09:01:04 PM by TillM »

Moby

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #422 on: October 30, 2018, 09:11:49 PM »
Finally  :) we told you to check the wires; )
For microphone transformers,  BV.8,  Bv.11,  Bv.12, etc.. contact me at mobyelectronics at gmail dot com

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #423 on: October 30, 2018, 09:35:36 PM »
The ground return was missing....

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #424 on: November 01, 2018, 09:09:30 AM »
I don’t know why it don’t work with the Aputis body

Might be a non-conductive coating on the body. Check with a DMM to see if there's continuity between two different points of the body surface.

TillM

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #425 on: February 28, 2019, 05:41:42 PM »
Hi guys,
after months without any issue, my M49 starts to make crazy noises.
I've to say the preamp is pushed really hard, but has anybody an idea, what could be the issue ?
I reflow every solder pads.
Clean the PCB again and changed the styroflex, this was the first, what comes into my mind.
I hope anybody can help.
Do you know, where the noise can come from ?

https://www.dropbox.com/s/88zubsc66wm1lwy/M49%20probleme.wav?dl=0


Ericbazaar

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #426 on: February 28, 2019, 05:48:00 PM »
Its the Tube. The 6s6b is a good Tube but many of them make noise after a while.
I think they are different in quality.

Best

TillM

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #427 on: February 28, 2019, 05:55:29 PM »
thanks for chiming in Andreas !
I will change the tube. I hope it will work as it should.

TillM

Re: Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)
« Reply #428 on: February 28, 2019, 06:39:13 PM »
great, from the first test with a new tube the buzzing is away. When I push the preamp now hard, the noise seams to be more from my computer and so on.
Well I never push the pre so hard, but a friend of mine need it for a record.
thank you very much !
Will test it with my other M49, than I can compare it better.

Nele

I'm organizing a group-buy for Cinemag transformers but will the CM-6511 be suitable for the 6V6S tube version or should I get a different one?


Moby

I'm organizing a group-buy for Cinemag transformers but will the CM-6511 be suitable for the 6V6S tube version or should I get a different one?
Why don't you proceed with the classic Bv.11?
For microphone transformers,  BV.8,  Bv.11,  Bv.12, etc.. contact me at mobyelectronics at gmail dot com

Nele

Why don't you proceed with the classic Bv.11?

Isn't the CM-6511 a reproduction/replacement for the BV11?

Moby

Isn't the CM-6511 a reproduction/replacement for the BV11?
Replacement, yes, reproduction, no. I really don't want to judge about the quality of this transformer, but it doesn't match the original Bv.11 in many aspects.
For microphone transformers,  BV.8,  Bv.11,  Bv.12, etc.. contact me at mobyelectronics at gmail dot com

e.oelberg

soooo.. I have this wonderful sounding, quiet (almost) m49c with 6s6b, BUT  there is a low volume gsm audible, only on headphones and only with good quipment ……… it's annoying me ... any community tip ?

cheers, Nicholas


 

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