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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: 85,444
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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: 463,661
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: 40,986
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: 29,793
Avatar for Aniol1349
Aniol1349 10th June 2017
Avatar for bleepScientific

I need to replace the very broken 10k linear "Tuning" pot on my MC-202 (thanks to my cat deciding the synth stand would...

replies: 1 views: 213
Avatar for Jim Williams
Jim Williams 5 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: 18 views: 638
Avatar for digitall2000
digitall2000 5 hours 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: 2 views: 275
Avatar for Brian M. Boykin
Brian M. Boykin 8 hours ago
Avatar for Audiotales

Hello! I have a Fredenstein bento6 lunchbox and I would like to replace the switching PSU with a linear one (toroidal...

replies: 1 views: 166
Avatar for Cozmik Prod.
Cozmik Prod. 9 hours ago
Avatar for Florianinside

Hi there, I was curious how it looks inside my Go Keys and so i opened it. Good news: Only type of screw. Bad news: Cables are...

replies: 0 views: 102
Avatar for Florianinside
Florianinside 10 hours ago
Avatar for IliasPre

Can any owner of a SSL 4000 E/G series tell me this height? from top point to floor (picture). Also, how high can you adjust the...

replies: 8 views: 427
Avatar for Radardoug
Radardoug 22 hours ago
Avatar for joshchristmas89

hey brothers long time lurker first time poster just bought a second hand prophet-6 everything has been great apart...

replies: 0 views: 192
Avatar for joshchristmas89
joshchristmas89 1 day ago
Avatar for Opera Insights

Hey, New user, long time troll. Heading off to audio engineering school in the fall and want to get ahead of the game a little....

Opera Insights
replies: 5 views: 817
Avatar for omega75
omega75 1 day 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: 1 views: 309
Avatar for dfchandler
dfchandler 1 day ago
Avatar for GaryInThailand

Hi everyone, I'm Gary Hall. Many years ago, I was the lead designer of the Lexicon PCM42. Beyond all expectations at the time,...

replies: 10 views: 1,279
Avatar for Alex Kretov
Alex Kretov 1 day 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: 16 views: 3,106
Avatar for totallybertini
totallybertini 2 days 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: 33 views: 1,031
Avatar for Jim Williams
Jim Williams 2 days ago
Avatar for HeavySunWes

Hello all. I’ve tried researching this topic and I can’t seem to find anyone who has had the exact same problem. My 8P has...

replies: 2 views: 343
Avatar for Zaphod Betamax
Zaphod Betamax 2 days ago
Avatar for peterlim

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

replies: 18 views: 429
Avatar for peterlim
peterlim 2 days ago
Avatar for alexstringer

Can anybody help me find out how to replace the lithium battery on a Lexicon 200? I know Jim Fabiano makes it his speciality but...

replies: 15 views: 4,862
Avatar for mikelevitt
mikelevitt 2 days 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: 22 views: 2,617
Avatar for gyraf
gyraf 2 days ago
Avatar for ozbox

Hello. Does anyone have tech manual for this console? I know that audiomaintenance is selling full manual. But it's real pain...

replies: 6 views: 5,208
Avatar for yetemono
yetemono 3 days 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: 2 views: 312
Avatar for Jason Graham
Jason Graham 3 days ago
Avatar for bubblebash

I've been hunting around for a slightly smaller version of a 240x64 lcd and having some difficulty. Hopefully someone has a...

replies: 0 views: 280
Avatar for bubblebash
bubblebash 3 days 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: 3 views: 314
Avatar for Brian M. Boykin
Brian M. Boykin 3 days 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: 20 views: 654
Avatar for Jim Williams
Jim Williams 3 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: 24 views: 6,537
Avatar for Jim Williams
Jim Williams 3 days 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: 7 views: 305
Avatar for Jim Williams
Jim Williams 3 days ago
Avatar for burns46824

This is hard to find, so I scanned it for anyone interested.

replies: 2 views: 1,489
Avatar for nednerd
nednerd 3 days 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: 6 views: 293
Avatar for grantmwalker
grantmwalker 3 days ago
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: 1,085
Avatar for Japower
Japower 3 days 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: 2,278
Avatar for Radardoug
Radardoug 4 days 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: 1,126
Avatar for gyraf
gyraf 4 days 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: 378
Avatar for niklasni1
niklasni1 4 days 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: 2,755
Avatar for detroitbasement
detroitbasement 5 days 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: 268
Avatar for Jay Rose
Jay Rose 5 days 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: 1,666
Avatar for Hollowman9
Hollowman9 5 days 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: 30,391
Avatar for Pno
Pno 5 days 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: 296
Avatar for mogazi!
mogazi! 6 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: 2,506
Avatar for SZC
SZC 6 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: 281
Avatar for Denshin
Denshin 6 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: 1,084
Avatar for J0LLYR0GER
J0LLYR0GER 6 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: 365
Avatar for acreil
acreil 1 week 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: 442
Avatar for Matt Syson
Matt Syson 1 week 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: 421
Avatar for sonicdom
sonicdom 1 week 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: 491
Avatar for Robert Machine
Robert Machine 1 week 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: 374
Avatar for Jay Rose
Jay Rose 1 week 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: 346
Avatar for acreil
acreil 1 week 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: 1,095
Avatar for invalidusername
invalidusername 1 week 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: 309
Avatar for psiclone
psiclone 1 week 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: 325
Avatar for emrr
emrr 1 week 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: 480
Avatar for mbrebes
mbrebes 1 week 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: 27,468
Avatar for dynamixii
dynamixii 1 week 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: 363
Avatar for HaveItAll
HaveItAll 1 week 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: 654
Avatar for JohnRoberts
JohnRoberts 1 week ago


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