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Avatar for MicroSonic

I have been collecting schematics for 30 years and 5 years ago I started make them available at my site but...

replies: 68 views: 85,317
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trondl 2 weeks ago
Avatar for Tim Farrant



OK, something to spice up Geekslutz = here is where we post images of the INSIDE of audio equipment. Disclaimer; any photo...

Tim Farrant
replies: 1,078 views: 463,319
Avatar for fazeka
fazeka 16th October 2018
Avatar for gabriel1

DSP Innovations has recently launched a FREE data sheet search site. The site, - Search Electronic Components ,...

replies: 16 views: 40,933
Avatar for ponzi
ponzi 27th October 2017
Avatar for Tim Farrant

Anyone who offers technical services should get themselves listed into the new member directory here... Gearslutz Directory:...

Tim Farrant
replies: 8 views: 29,737
Avatar for Aniol1349
Aniol1349 10th June 2017
Avatar for valvusmusicus

Hi All My 101 is ill! Turn it on, with either batteries or PSU-most of the LEDs light up, the top of the display displays very...

replies: 1 views: 1,042
Avatar for Japower
Japower 25 minutes ago
Avatar for stevo991

I would like to start a thread for all of you slutz out there that has any info or schematics on AMEKS BIG, Recall, and 501 by...

replies: 20 views: 2,523
Avatar for Studio14
Studio14 42 minutes ago
Avatar for grantmwalker

Hello Fellow Gearslutz, I don't believe I've posted in some years... Though I continue to frequent the board from time to time...

replies: 5 views: 189
Avatar for tINY
tINY 1 hour ago
Avatar for Jason Graham

Hello, I recently acquired an Otari MX-80 32 track 2" tape machine. Transport appears to be in good shape, 32 track heads...

Jason Graham
replies: 0 views: 46
Avatar for Jason Graham
Jason Graham 1 hour ago
Avatar for zarembo

hey all, I have a p3000 which exhibits a crackle out of the left channel high freq. when pushed to a certain level. At...

replies: 29 views: 2,229
Avatar for Radardoug
Radardoug 4 hours ago
Avatar for IliasPre

Hello gearslutz, I'm about to be the proud owner of an SSL 4000 E Series (24ch) in about a week or so. I've started...

replies: 19 views: 559
Avatar for nosebleedaudio
nosebleedaudio 4 hours ago
Avatar for peterlim

Dear All, The "play", "FF" and "Rewind" buttons were working a couple years ago. I tired to...

replies: 14 views: 336
Avatar for Jay Rose
Jay Rose 5 hours ago
Avatar for dmartin

What are your opinion of schools like Full Sail, SAE, and CRASS. I have heard conflicting opinions and I am just curious if...

replies: 23 views: 6,450
Avatar for Jay Rose
Jay Rose 5 hours ago
Avatar for Brian M. Boykin

Hello, I’m about to combine two of the same console and was wondering if I can change positioning of input, group, modules...

Brian M. Boykin
replies: 0 views: 74
Avatar for Brian M. Boykin
Brian M. Boykin 5 hours ago
Avatar for gorka

Hello, I´m no technician and I don´t want to judge the quality of designs around the opa275. I´m just asking because I...

replies: 6 views: 203
Avatar for tINY
tINY 6 hours ago
Avatar for Valeto

I have some stereo stripes from retro Soundcraft 2400 mixer. (I don't have the mixer itself). Main question: How to use them...

replies: 9 views: 1,091
Avatar for gyraf
gyraf 15 hours ago
Avatar for StormLord11

I have a Kurzweil 2500 with 4 keys are not working/working intermittently; A1, F2, C#2, and A2. I tried cleaning the contacts...

replies: 8 views: 335
Avatar for niklasni1
niklasni1 1 day ago
Avatar for Bannny

Hello, I'm getting my humble Ramsa wr-s4424 overhauled, but I haven't been able to locate the schematic. I know it's a pretty...

replies: 11 views: 2,728
Avatar for detroitbasement
detroitbasement 1 day ago
Avatar for ducksalot

Hey All I have an Allen and Heath MixWiz 16:2 that was working fine, until suddenly the phantom power went out on all channels....

replies: 1 views: 231
Avatar for Jay Rose
Jay Rose 1 day ago
Avatar for Hollowman9

I have begun making modifications to an old Univox Maxi-Korg synthesizer. When I bought the unit it was partially functioning...

replies: 35 views: 1,637
Avatar for Hollowman9
Hollowman9 1 day ago
Avatar for Tibbon

I've been screwing around with (non-RoHS) electronics since I was about 5 and got my first electronics kit. I've had a soldering...

replies: 97 views: 30,317
Avatar for Pno
Pno 1 day ago
Avatar for mogazi!

Hello, I'm trying to derive a short pulse from the rising edge of a gate input signal on a synth. More specifically trying to...

replies: 2 views: 255
Avatar for mogazi!
mogazi! 2 days ago
Avatar for SZC

I'm no stranger to opening up microphones but the Baby bottle is a real puzzle. Anyone here know the secret ? I'm guessing...

replies: 6 views: 2,479
Avatar for SZC
SZC 2 days ago
Avatar for GeorgePuddin

Hey guys. Ive recently bought a Soundcraft 600 mixing console and have been cleaning it up. I've come across an issue I just...

replies: 0 views: 206
Avatar for GeorgePuddin
GeorgePuddin 2 days ago
Avatar for Denshin

hi, Does anyone have a proper Footprint of the neve BA440 or a source for printed PCB around europe? Thx in Advance

replies: 0 views: 246
Avatar for Denshin
Denshin 2 days ago
Avatar for slor

I've had a Harrison PRO-790 for a couple of years now and, though it's far from the most impressive console the company made, I...

replies: 6 views: 1,056
Avatar for J0LLYR0GER
J0LLYR0GER 3 days ago
Avatar for gkmaia

Hi, I just toke my D-50 out of storage after 20 years and the sound is completely distorted, noise & creaking....

replies: 5 views: 333
Avatar for acreil
acreil 3 days ago
Avatar for JFunc

Hallo folks! Does anyone out there know of a decent replacement screen, for the main unit, of a 24/96? My one is pretty dim...

replies: 0 views: 240
Avatar for JFunc
JFunc 3 days ago
Avatar for smilan

Hello, I have few external mic preamps with transformer coupled outputs. When I connecting the preamp output to the Angela...

replies: 14 views: 409
Avatar for Matt Syson
Matt Syson 3 days ago
Avatar for sonicdom

Hi This is a long shot, but does any of you gearslutz happen to have a spare input transformer (771273A) for a PYE compressor...

replies: 3 views: 387
Avatar for sonicdom
sonicdom 3 days ago
Avatar for digitall2000

hi all, having an issue with an otari mrt-90 mkIII, have been using this paper by j. s. smullian to do the transport...

replies: 13 views: 544
Avatar for peterlim
peterlim 3 days ago
Avatar for Robert Machine

I come across this video & it's in direct contrast to what everyone says. He states you do not need to speaker load on the...

Robert Machine
replies: 12 views: 458
Avatar for Robert Machine
Robert Machine 4 days ago
Avatar for norfolk martin

I'm not even sure if I'm in the right forum, but I assumed this is where the folks with greater technical knowledge then me hang...

norfolk martin
replies: 6 views: 344
Avatar for Jay Rose
Jay Rose 4 days ago
Avatar for StormLord11

Well this is a long shot, but maybe there's someone out there familiar with this machine :|. I have a Yamaha CE20 "Combo...

replies: 3 views: 315
Avatar for acreil
acreil 4 days ago
Avatar for invalidusername

Hi I have a PORTA 07 with a faulty voltage regulator. There's only written B891 on it. What's an equivalent part ? What's its...

replies: 16 views: 1,069
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invalidusername 5 days ago
Avatar for psiclone

Hello. I have a Behringer UMC204HD that I just bought and I'm trying to run both a mic and general sound from my computer...

replies: 0 views: 276
Avatar for psiclone
psiclone 5 days ago
Avatar for bpr103

I'm getting an Altec 1566a here (with the output transformer) and I'm a little confused by the output wiring. Here's the manual,...

replies: 3 views: 292
Avatar for emrr
emrr 5 days ago
Avatar for joedonchev

Hi guys, I'm trying to bring back to life my Peavey Rockmaster tube preamp. It has a special sized transformer to fit the...

replies: 7 views: 440
Avatar for mbrebes
mbrebes 5 days ago
Avatar for Seamus TM

Hi all, I am trying to find an NTP M100c op amp. Any ideas? Thanks, Seamus EDIT: Found some, thanks!

Seamus TM
replies: 15 views: 3,063
Avatar for gyraf
gyraf 5 days ago
Avatar for roginator

decided to replace most of displays in my studio equipment that are dead or allmost at end of life .. most synths is now hard to...

replies: 114 views: 27,428
Avatar for dynamixii
dynamixii 5 days ago
Avatar for HaveItAll

So much gear from the 2000's had switches fail. I want to resurrect a Roland Fantom-X and a V-Synth. Are 'soft tact' something I...

replies: 4 views: 332
Avatar for HaveItAll
HaveItAll 6 days ago
Avatar for AlphaDingo

Hi everyone. I've got a mixer I'm going to be using and I've noticed that keeping the volume low on the channels and the master...

replies: 22 views: 626
Avatar for JohnRoberts
JohnRoberts 6 days ago
Avatar for spectrasound

Who is using a Cadac J-Type console in their studio ? Dealing with some PFL and routing Mods. I can see a future "Cadac...

replies: 8 views: 3,803
Avatar for spectrasound
spectrasound 6 days ago
Avatar for Brownrusty

Hey guys, I have three BSS 404 units all with the exact same problem... The units power up and seem to be running normally,...

replies: 3 views: 2,258
Avatar for musicfirst234
musicfirst234 6 days ago
Avatar for Gabriel Sousa

hello i need to make a low pass and a high pass filter i have here Guitar Pedals: R-C Filter Calculator a simples...

Gabriel Sousa
replies: 10 views: 7,452
Avatar for u87allen
u87allen 6 days ago
Avatar for PartHunter

Hi guys, Was hoping somebody could help me with a problem that's popped up after recapping a guitar amp I own.. I'm not an...

replies: 5 views: 403
Avatar for u87allen
u87allen 6 days ago
Avatar for Blissy

Hey all, Would really appreciate it if anyone could point me in the direction of a Soundtracs PC MIDI 24 Manual. Thanks...

replies: 1 views: 284
Avatar for mbrebes
mbrebes 1 week ago
Avatar for filmcomposer

I've a matched pair of Oktava MK-102 s with different capsules. They were working fine and well-looked after. Recently, one...

replies: 7 views: 751
Avatar for filmcomposer
filmcomposer 1 week ago
Avatar for grannis

I am a guitarist/BV singer with mild hearing loss, resulting in a notch between around 1khz and 2kz Since I use wired...

replies: 1 views: 322
Avatar for wrgkmc
wrgkmc 1 week ago
Avatar for LFTR

Hi, i need new set of passive monitors to test and compare gear i made. For now i'm using old KRK ST8 which aren't matched at...

replies: 2 views: 373
Avatar for LFTR
LFTR 1 week ago
Avatar for Johnny Mack

Can someone share with me the termination of the xlr using Gotham GAC-7? Thank you.

Johnny Mack
replies: 3 views: 332
Avatar for Jay Rose
Jay Rose 1 week ago
Avatar for Slutty Professor

Can the Roland JX3P be switched from using 120V power to 220V power by replacing the transformer and just the fuses from the...

Slutty Professor
replies: 4 views: 343
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Slutty Professor 1 week ago
Avatar for Tonzim

Hi. Any skilled electronic engineers out there who could help me out with some pinpoints to where this malfunction of the 5021...

replies: 0 views: 292
Avatar for Tonzim
Tonzim 1 week ago
Avatar for Julian J. Ludwig

Hey guys, how are you? I was going for a Neumann KM100 + AK40, but I noticed that the internal connections are totally...

Julian J. Ludwig
replies: 2 views: 370
Avatar for Julian J. Ludwig
Julian J. Ludwig 1 week ago
Avatar for novoline

Hi- I recently got an EPS16+rack, no scsi, in a trade. I'm generally familiar with how to use it because of have an original EPS...

replies: 2 views: 478
Avatar for RetroFunk
RetroFunk 1 week ago


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