Dimis76

Rode VideoMicro and XLR connection with Phantom Power
« on: May 29, 2018, 10:45:12 AM »
Hello everybody, i am new to this (i also hope i am at the correct section of the forum)!!
I am a videographer and till now i have used several microphones that were intended for video cameras with XLR connection which also required phantom power.
Recently i have purchased a RODE Videomicro which has a TRS connection (i think) but needs a "bias or plug  in power of 2-5 volts - I read somewhere it can go up to 10v - Here is the webpage of the specific Mic http://www.rode.com/microphones/videomicro

So the question is how can i make a diy cable from 3,5mm TRS plug to Reduced power 5V (from 48V) XLR?

Regards



rogs

Re: Rode VideoMicro and XLR connection with Phantom Power
« Reply #1 on: May 29, 2018, 08:29:52 PM »
You might find this is the simplest way to solve your problem - the Rode VXLR+ :  http://en.rode.com/accessories/vxlrplus     

Not to be confused with the Rode VXLR :   http://www.rode.com/accessories/vxlr     No facility for phantom power with that one..
 
www.amx.jp137.com - A DIY RF condenser mic project

rogs

Re: Rode VideoMicro and XLR connection with Phantom Power
« Reply #2 on: June 04, 2018, 06:17:11 AM »
Did you go for the Rode device , or did you find an alternative solution?...
« Last Edit: July 27, 2019, 05:09:30 PM by rogs »
www.amx.jp137.com - A DIY RF condenser mic project

Dimis76

Re: Rode VideoMicro and XLR connection with Phantom Power
« Reply #3 on: July 26, 2019, 03:01:03 AM »
No i am still looking....

I was thinking a voltage divider or an LMxxx solution...
Has anybody tried that?

Re: Rode VideoMicro and XLR connection with Phantom Power
« Reply #4 on: July 26, 2019, 04:13:29 AM »
No i am still looking....

I was thinking a voltage divider or an LMxxx solution...
Has anybody tried that?
I'd just go with Rode's adapter since it's made for this purpose specifically. Plus if anything goes wrong you won't void your warranty.

rogs

Re: Rode VideoMicro and XLR connection with Phantom Power
« Reply #5 on: July 26, 2019, 05:07:45 PM »
I was thinking a voltage divider or an LMxxx solution...
Has anybody tried that?
As suggested above, the Rode adaptor is probably the easiest solution, but you can build something similar for a bit less cash..
The attached notes suggest one option which seems to work pretty well.... The voltage divider with the values shown gives an off load output of around 7V  - dropping to between 3V and 5V for most electret PIP mics..

There's not really any need for regulation with this kind of adaptor.....
« Last Edit: July 27, 2019, 04:19:01 AM by rogs »
www.amx.jp137.com - A DIY RF condenser mic project

RuudNL

Re: Rode VideoMicro and XLR connection with Phantom Power
« Reply #6 on: August 07, 2019, 04:32:36 AM »
In the case of a transformer balanced microphone input, the audio is also going through C2.
Personally I would use a larger value for this capacitor.
There is a solution for every problem!

http://www.vansteenisaudio.nl

rogs

Re: Rode VideoMicro and XLR connection with Phantom Power
« Reply #7 on: August 07, 2019, 07:52:17 AM »
In the case of a transformer balanced microphone input, the audio is also going through C2.
Personally I would use a larger value for this capacitor.

You're right of course Ruud .... about -30dB of attenuation @ 1KHz, but only around -12dB @ 100Hz ...Time to make C2 another 10uF 50V perhaps?....
Now, just need to squeeze that into the XLR!.....
www.amx.jp137.com - A DIY RF condenser mic project


 

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