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General Discussions => The Lab => Topic started by: duantro on October 13, 2010, 02:50:56 AM

Title: Lomo mke100 / oktava mke271 info or 48v conversion?
Post by: duantro on October 13, 2010, 02:50:56 AM
I've picked up a lomo mke100 electret microphone and a visibly identical oktava mke271 microphone. I've done many searches and can't find any info on these at all. One has batteries that are almost dead, but sounds great as a drum mono overhead. They have 2 Hyundai r10, 1.5 volt batteries that I can't seem to find here in the states. Would it be easier to convert these to phantom than locate batteries? Does anyone have any ideas?
Title: Re: Lomo mke100 / oktava mke271 info or 48v conversion?
Post by: CemD on October 13, 2010, 03:45:09 PM
Hi I am from Russia.
You can do so.

http://twin-x.com/groupdiy/displayimage.php?pos=-4139

http://twin-x.com/groupdiy/displayimage.php?pos=-4138

http://twin-x.com/groupdiy/displayimage.php?pos=-4137

But it can be changed completely.
The result is good. This is a scheme.

http://twin-x.com/groupdiy/displayimage.php?pos=-4142

Look here

http://forum.gtlab.net/cgi-bin/yabb2/YaBB.pl?num=1228832854/0

Here is one scheme

http://twin-x.com/groupdiy/displayimage.php?pos=-4143

Sorry for my English.
Title: Re: Lomo mke100 / oktava mke271 info or 48v conversion?
Post by: duantro on October 13, 2010, 05:33:06 PM
Wow, that's cool. Thanks for the reply. I used a translator program that was horrible, therefore I could not quite understand most of it. It looks like you, and some others on that forum, are converting the MKE 100 to the electronics of a LOMO 19a19 tube circuit? That would be a great! The forum also wouldn't let me see any of the diagrams or pictures. Any tips on better accessing or translating it. Are you or someone else selling a pcb kit with a parts list or kit that includes everything?
Title: Re: Lomo mke100 / oktava mke271 info or 48v conversion?
Post by: duantro on October 14, 2010, 11:21:06 AM
Your diagrams are now links to image hosting, that show up now. Have you done all of the mods? Do you prefer one over the other? I'm assuming the the tube circuit is the 19a19 conversion, from what I could translate from the forum link?
Thanks!
Title: Re: Lomo mke100 / oktava mke271 info or 48v conversion?
Post by: CemD on October 14, 2010, 11:46:47 AM
Microphones reworked in two ways:

1. Without an output transformer. According to the scheme.

http://twin-x.com/groupdiy/displayimage.php?pos=-4142

My caps were bad therefore added to this scheme through the polarizing voltage divider.

http://twin-x.com/groupdiy/displayimage.php?pos=-4140

Result sound good.

2. The other with tubes under the scheme LOMO 19A19. According to the scheme.

http://twin-x.com/groupdiy/displayimage.php?pos=-4141

Output transformer K=1:5. You can use the output transformer of the MCE-100

http://twin-x.com/groupdiy/displayimage.php?pos=-4136
http://twin-x.com/groupdiy/displayimage.php?pos=-4135

The result is a very good sound.

Also, I have collected LOMO 19A19 from the microphone capsule OCTAVA MK-102. In the photo on the left.

http://twin-x.com/groupdiy/displayimage.php?pos=-4134
Title: Re: Lomo mke100 / oktava mke271 info or 48v conversion?
Post by: rodabod on October 15, 2010, 03:41:09 AM
Also, I have collected LOMO 19A19 from the microphone capsule OCTAVA MK-102. In the photo on the left.

http://twin-x.com/groupdiy/displayimage.php?pos=-4134

Wow. Seriously good work there.
Title: Re: Lomo mke100 / oktava mke271 info or 48v conversion?
Post by: Studiogearlover on May 13, 2019, 06:49:41 AM
Hi I am from Russia.
You can do so.

http://twin-x.com/groupdiy/displayimage.php?pos=-4139

http://twin-x.com/groupdiy/displayimage.php?pos=-4138

http://twin-x.com/groupdiy/displayimage.php?pos=-4137

But it can be changed completely.
The result is good. This is a scheme.

http://twin-x.com/groupdiy/displayimage.php?pos=-4142

Look here

http://forum.gtlab.net/cgi-bin/yabb2/YaBB.pl?num=1228832854/0

Here is one scheme

http://twin-x.com/groupdiy/displayimage.php?pos=-4143

Sorry for my English.


Hello

I know this is an old thread but could you please let me know if this Lomo capsule can take 5.1V across the capsule? Or this must be lower than that ?

I can not find any info on what is the voltage across the capsule ...Thank you ! :)