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maybe your recording software has what you need fft is fast fourier transform (filter) - a spectrum analyser this free recording program has a white noise generator and an fft filter http://audacity.sourceforge.net/ here's another thread that may give you a few ideas...

this thread might help https://homerecording.com/bbs/showthread.php?t=38175

just make sure whatever you swap that it's going to fit, physically in general, for every increase in capacitance or voltage there is a corresponding increase in physical size as it is, the 4700uF filter caps are on long leads because they have to be lain on their sides -...

there's not a simple answer to your concerns i'm no expert, but on my projects that i've designed or built (some of which even worked :)) i always use a capacitor with a working voltage of about 20% or more above its rating in theory, using a cap at it's rated voltage and temperature...

there aren't any good or even adquate fixes yet but there are two things that will definitely be in the ultimate list of fixes 1) rotate the power transformer 2) swap out the q4 and q5 transistors on the eq boards read this thread for more detail...

in the 24v power supplies c9 and c14 (4700uF/35v) are the only electrolytics seeing 33v i agree that's cutting it too close but hopefully at reasonable temperatures they will be adequate there are some electrolytics on the other boards rated at 25v (possibly seeing up to 24v) - that's...

http://www.prodigy-pro.com/diy/index.php?topic=27791.240 post 246

that's good i hear no noise do you have the output gain cranked all the way up?

replacing it would be easy finding a good one that is compatible electrically and physically would be the hard part I think a smaller one that could be mounted vertically on the sidewall toward the rear instead of horizontally in its present location could go a long way toward...

it would be helpful if someone could shoot a pic of the inside of an 84 to see where things are located and to see if it uses the same type eq inductor and the same toroid ps transformer as the 81's

that's great! is there anyone near you that can compare the electronics of these to the ones with hum to see if differences exist? were these late arrivals that may have been among those that had the delayed shipping due to quality problems?

yeah, i know that i'm an asshole i'm just looking for a fix and it seemed to me in reading different boards that many people are just accepting of the situation or think that tnc is going to fix these i seriously doubt that that is going to happen in light of the huge logistics...

i've read posts here and elsewhere about how "awesome" these pres are so i guess i infer from this that they are using only the preamp stage without any eq engaged i guess that's fine if that's all you expect but i want the eq's so i guess if i fix mine (and i will) there's no...

vitriol? i think not - i'm just trying to find what makes a usable unit ok i have one with changed transistors noise is better but still there i think it's the power transformer too but if there are units that function perfectly after the transistor swap lets hear about it

the issue is do any of them work right? if so, it would be nice to find out why so the rest of us could fix ours here's a quote from another board

if you don't know what it is consider yourself lucky and you don't have to vote :D

i guess i didn't allow for the possibility of multiple units some working and some not if you have even one that works perfectly answer yes i have several and none of them is without hum/buzz

i know, i know - wrong forum but most of the interest in these from the gb is located here

just to get an idea of the prevalence of these problems: has anybody here received a fully functional 1081? (that is, no hum or buzz or other extraneous noise with the output gain at max and the eq switches fully engaged) or are we just a few whiners here? i'll ignore the mic gain...

put them on like this