Condenser Microphone Amplifier Modules

[dima85]

I sell three different condenser microphone amplifier modules for Chinese BM-700, BM-800 or similar microphone body on eBay:

1. CM-1A (Starting lvl);
   
2. CM-2A (Middle lvl);
   
3. CM-1XP (High lvl).

Compatible capsule: 34mm condenser capsule or 25mm electret (without built-in JFET). Required 48V phantom power.

 

[dima85]

Assembled microphone with High lvl module (for example):

 

[dima85]

You can also buy assembled microphones on eBay:

1. Starting lvl;
   
2. Middle lvl;
   
3. High lvl.

 

[dima85]

ESD-packed.

 

[stratus46]

When I see surface mount electrolytics my skin starts to crawl. I've replaced more of those than most can
imagine. They are probably the most failure prone parts I have seen. Change those to organic polymer and
then you'll have something.

G²

 

[dima85]

stratus46, in how many microphones have you replaced the electrolytic capacitors? You do not even know the operation modes under which they work and you advise nonsense.

 

[stratus46]

I have only replaced the occasional FET in condenser mics. But when I see failure prone caps used when they
don't have to be, I speak up. You don't like it as is your right. I did suggest a solution which you probably don't
like polymer caps as is also your right.

I've been repairing electronics over 50 years and have seen many things, some brilliant and some dumb.

G²

 

[dima85]

stratus46, the ripple current of these capacitors is less than 3 mA. At this current, they will last for decades, just like polymer capacitors. But beyond that, electrolytic capacitors have the correct ESR for audio depending on the frequency.
This is not a question of what I like, this is the only correct solution.