Search found 4 matches

by Paul Maybury
Wed Jul 28, 2010 12:02 pm
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 335
Views: 321517

Re: BA BA2 BA4 BAD Dual99v Build Thread

Hi Joe, thanks again for your help. If the phantom is always going to thump a bit anyway, there's no problem as such. It's no where near as dramatic as the thump my SoundWorkshop console pres make! My main converters are Motu 24 i/o, RME Fireface and sometimes some MetricHalo's on loan. All are +4 b...
by Paul Maybury
Tue Jul 27, 2010 9:43 pm
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 335
Views: 321517

Re: BA BA2 BA4 BAD Dual99v Build Thread

Hi Joe, thanks for replying. All of the points on your checklist are correct in my build. After taking out the 2 ceramic caps under the op amp, the noise is gone, the only issue now is the thumping noise when switching on phantom power. It's minimal if I have the pad engaged when I switch on phantom...
by Paul Maybury
Sun Jul 18, 2010 4:32 pm
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 335
Views: 321517

Re: BA BA2 BA4 BAD Dual99v Build Thread

Thanks for the reply. I went back through some emails from Joe, and in one he mentioned snipping out the 2x47pf ceramic caps under the op amp. I did this today and the noise is gone! However, I'm now getting a thump when applying phantom power, and there is dc showing on the gain pot, about 50mV wit...
by Paul Maybury
Sat Jul 17, 2010 10:38 am
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 335
Views: 321517

Re: BA BA2 BA4 BAD Dual99v Build Thread

Hi, I wonder if anyone is having the same problem as me? I built a Ba4 kit using all jlm parts (no o/p trans), and I am getting hissy noise on most settings of the gain pot. The hiss goes up in proportion to the gain, up to a point, then , at a certain spot the hiss jumps right up, out of proportion...