414 EB P48 Repair / low output

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mkiijam

Well-known member
Joined
Aug 25, 2017
Messages
170
I found a shorted tantalum and replaced it, which got the mic working much better, but it still seems "low" At least compared to a MXL Chinese clone mic. How does one "know" where the output should be?

I'm like the 10th tech to work on this mic, lots of poor work all over... dirty (flux) PCB, on both sides, but it looks like flux from the factory... hard to say.

Does anyone have a voltage chart or anything to help diagnose where the issues may be? Or any advice. I'm getting 38.5 VDC on the transformer, is that too low?
 
The output will be lower than most chinese condenser circuits.  I do not recall specifically, but mine is similar to old u87, sm7b, re20, etc.  my “old” mics.  I find chinese condensers typically need several clicks less gain on any preamp

I replaced all electrolytics and tant caps in mine, and it works and sounds good.  It’s a go to room mic, acoustic guitars, misc stuff like percussion, etc. 
 
Thanks for the info,

What did you replace the tants with? More tantalum or like Panasonic FC's or something?
 
I used new tants.

Good luck on the transistors,  but also they could potentially be stock... you'll have to do some research. what is in it?
 

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