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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: 85,252
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trondl 1 week 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: 463,117
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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: 40,895
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: 29,701
Avatar for Aniol1349
Aniol1349 10th June 2017
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: 5 views: 136
Avatar for StormLord11
StormLord11 31 minutes 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: 10 views: 369
Avatar for IliasPre
IliasPre 2 hours ago
Avatar for peterlim

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

replies: 4 views: 148
Avatar for Radardoug
Radardoug 3 hours 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: 279
Avatar for acreil
acreil 5 hours 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: 83
Avatar for JFunc
JFunc 7 hours 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: 338
Avatar for Matt Syson
Matt Syson 14 hours 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: 347
Avatar for sonicdom
sonicdom 14 hours 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: 509
Avatar for peterlim
peterlim 19 hours 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: 411
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Robert Machine 1 day 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: 300
Avatar for Jay Rose
Jay Rose 1 day 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: 279
Avatar for acreil
acreil 1 day 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: 1,045
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invalidusername 2 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: 249
Avatar for psiclone
psiclone 2 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: 258
Avatar for emrr
emrr 2 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: 407
Avatar for mbrebes
mbrebes 2 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: 3,037
Avatar for gyraf
gyraf 2 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: 27,385
Avatar for dynamixii
dynamixii 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: 5 views: 2,432
Avatar for Andrenalinnn
Andrenalinnn 3 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: 302
Avatar for HaveItAll
HaveItAll 3 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: 586
Avatar for JohnRoberts
JohnRoberts 3 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: 3,776
Avatar for spectrasound
spectrasound 3 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: 2,238
Avatar for musicfirst234
musicfirst234 3 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: 7,427
Avatar for u87allen
u87allen 3 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: 372
Avatar for u87allen
u87allen 3 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: 258
Avatar for mbrebes
mbrebes 4 days 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: 729
Avatar for filmcomposer
filmcomposer 4 days 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: 290
Avatar for wrgkmc
wrgkmc 5 days 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: 345
Avatar for LFTR
LFTR 5 days 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: 306
Avatar for Jay Rose
Jay Rose 5 days 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: 318
Avatar for Slutty Professor
Slutty Professor 5 days 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: 265
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Tonzim 6 days 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: 340
Avatar for Julian J. Ludwig
Julian J. Ludwig 6 days 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: 460
Avatar for RetroFunk
RetroFunk 6 days 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: 21 views: 6,390
Avatar for analogguru
analogguru 6 days ago
Avatar for AmongstTheLiving

I'm in the process of making my Midas Venice 240's Direct Outs pre fader. I'm going to be connecting the board to a balanced...

replies: 7 views: 3,671
Avatar for roho
roho 6 days ago
Avatar for Robert Machine

Can someone tell me how to bias a Ibanez TSA15H amp with a multimeter? Itb as 2 - 6V6GT tubes. I had to replace the bias trim...

Robert Machine
replies: 5 views: 332
Avatar for Robert Machine
Robert Machine 6 days ago
Avatar for FlorianCWN

Hello, I need to repair 2 of my aux out channel on my soundcraft 200 sr (1 and 3) and for that I m looking for the schematics of...

replies: 7 views: 629
Avatar for FlorianCWN
FlorianCWN 1 week ago
Avatar for okkokkokko

Welcome to exactly what the title of this thread suggests! And let me go straight to the disclaimer for all you millennial-,...

replies: 15 views: 1,522
Avatar for EvilRoy
EvilRoy 1 week 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: 8 views: 1,033
Avatar for Valeto
Valeto 1 week ago
Avatar for Emanuel23

In the proces of restoring my CS 60 I removed all of the keys for a thorough cleaning. I'm about to reinstall them and noticed on...

replies: 0 views: 229
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Emanuel23 1 week ago
Avatar for filmcomposer

Everywhere one reads, it’s emphasized that only ‘Hammond tonewheel generator oil’ must be used to oil a Hammond...

replies: 6 views: 796
Avatar for DrAudiospecific
DrAudiospecific 1 week ago
Avatar for welhamm

Hey guys I own a Tascam 238 unit and use it to multitrack to in my hardware electronic set up. Its a great unit but I recently...

replies: 1 views: 251
Avatar for Radardoug
Radardoug 1 week ago
Avatar for thijsdrum

A while ago I got a Dynacord Echocord Mini. To start of I cleaned the whole machine and heads. I got new tapes from MyTapeEcho....

replies: 1 views: 657
Avatar for ekadek
ekadek 1 week ago
Avatar for wavesfactory

Hi guys, Just a simple question. I'm about to release some new instruments and there's the possibility to release them as...

replies: 2 views: 822
Avatar for Pablo Wilard
Pablo Wilard 1 week ago
Avatar for Brian M. Boykin

Hello, Want to start replacing carbons in my console with these, specifically the resistor array in the mic pre because the...

Brian M. Boykin
replies: 13 views: 487
Avatar for Brian M. Boykin
Brian M. Boykin 1 week ago
Avatar for megatonemark

Hi guys and gals, Quick question. I have just built my first diy project, an AML ez1073 pre. I'm at the calibration stage...

replies: 8 views: 1,371
Avatar for blacky123
blacky123 1 week ago
Avatar for sameal

Hi again. Well i got one working deck, so thats pretty rad and thanks everybody helping me with that last time. Now i have a...

replies: 4 views: 387
Avatar for sameal
sameal 1 week ago
Avatar for Systolic

I was given a SPX90II. It powers on, the menus work, it sees the input signal, but no sound is output on either channel. Is...

replies: 59 views: 19,026
Avatar for iLCacciLLo
iLCacciLLo 1 week ago
Avatar for Robert Machine

I'm getting mixed info on this & I'm hoping someone can shed some light. I know the Marshall Origin 50H has a "Fixed...

Robert Machine
replies: 4 views: 407
Avatar for Robert Machine
Robert Machine 1 week ago

Hello everyone, I have to clean some scratchy pots of my mixer. I read on this forum that tech pros do not recommend using...

replies: 31 views: 882
Avatar for Brent Hahn
Brent Hahn 1 week ago


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