Finally got mine finished today
You had to do some adjustments on that SC400 body or the PCB fit in perfectly? Starting mine very soon and can get one for like 10€.
Finally got mine finished today
Hi @mihi_fuchs
Yes, I will do.
I have checked the U87 Building Guide and for my understanding, to refine RV10 for the best sweet spot is to generate a tone via J4. How can I do that without special equipment?
If not, which cheapest kind of machine should I be looking for?
Or preferable a portable digital tone generator or portable digital oscilloscope will do the trick for this and bullet proof for future projects?
I used GND on Capsule/body which i took a cable from XLR pin1 and J9, is that correct?
Good idea, let's see if I can figure it out.
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| QUESTIONS |
1. I must give a lot of gain to have a reasonable level of sound, is this normal?
2. When I activate phantom power and start giving gain, I hear some crackling which goes away after a few seconds ON. Is this anything with the transformer? Does it need to break in on order to have normal results?
Here you can find some good info about soldering
If i were in the US I'd try the Jli capsule you can find it here TSC-2
Never tried out for my build as I'm from Italy and shipping makes it inconvenient, but they're not so expensive so worth a try in my opinion if you are in the US.
About the cleaning process, I didn't wash the pcb as you see in the video you mentioned, I've just used some Isoprophyl alchool on a towel and a toothbrush, or cotton fioc for the HiZ junction, and the mic is incredibly silent.
One thing I receltly implemented are a pair of 22nF caps at the XLR, as I was having some RF noise.. now it works perfectly.
Hi, i think I had these caps K223K15X7RF5UL2@antocu ,I'm kind of having the same problem with RF noise...which part specifically [on Mouser] did you use as 22nF caps specs for the XLR?
Thanks
This is a live video recorded with fuchs' u87. . . . This is the 8th single by Korean singer-songwriter Jo Jin-young.
I'm still working on them. I need to set the gain very high, and I have a bit too much floor noise, too. I will do what Mihi said and see how things work out. I'll keep you posted.What kind of noise you're getting? I have built three of these, and two have sort of a hiss noise, more of a fizzy kind, not smooth, and kind of over the normal noise floor, but its only present with certain preamp combinations, and only noticeable at very high gain settings, otherwise not noticeable under normal circumstances. I think it might be RF interference too, since it was mentioned somewhere on this thread, mihi omitted some inductors that seem to act as RFI filters too. Boards are clean, and so is hiz section too, and mics sound wonderful. I'm going to give a try with the RFI OPA filter too, thanks for the tip....
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