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

MicroSonic
replies: 88 views: 123,816
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gyraf 26th July 2021
Avatar for Tim Farrant

The GUTZ

139


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

Tim Farrant
replies: 1,164 views: 564,693
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Gainlab Audio 20th May 2021
Avatar for gabriel1

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

gabriel1
replies: 19 views: 58,235
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msbettyhunt 27th March 2020
Avatar for Tim Farrant

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

Tim Farrant
replies: 9 views: 47,247
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msbettyhunt 24th March 2020
Avatar for M.Retra

Forward Hello fellow GS'ers! This is a reissue of a thread that I started over in the Cakewalk forums. It was immensely...

M.Retra
replies: 91 views: 30,112
Avatar for Rick Dalton
Rick Dalton 2 hours ago
Avatar for twinfin

The left control room out is not working right . The meters are showing signal coming from the tape machine , and I do hear a...

twinfin
replies: 10 views: 1,734
Avatar for Jim Williams
Jim Williams 11 hours ago
Avatar for cinetj

I'm getting this high freq beeping kind of noise (file attached) on brand new presonus speakers even with no audio cable plugged...

cinetj
replies: 0 views: 57
Avatar for cinetj
cinetj 15 hours ago
Avatar for Molybdenum

has anyone had to repair the rubber mounting shocks in the base of a sony c37, or know if there is a replacement part available....

Molybdenum
replies: 5 views: 983
Avatar for Thomas W. Bethe
Thomas W. Bethe 17 hours ago
Avatar for steffrhys1@mac.c

Hi, I have a Rode Classic II which stopped working. I had 2 problems, one was that the cable on the microphone end was...

[email protected]
replies: 2 views: 584
Avatar for Moo
Moo 20 hours ago
Avatar for Gonzbull

Hi all hope you’re well, So I have an AX84 P1 5 watt tube amp that I built. I’ve got a few other amps so I would like to...

Gonzbull
replies: 2 views: 141
Avatar for Gonzbull
Gonzbull 1 day ago
Avatar for JoaoMoreira

Hi everyone! Recently I got scammed and bought a broken Vintech Dual 72 rack preamp. Worse than that it happened through a...

JoaoMoreira
replies: 6 views: 277
Avatar for NathanEldred
NathanEldred 1 day ago
Avatar for coreyspencer

I don't know or cant figure out why this QSC HPR152i active loud speaker is doing what its doing. So when I opened it up I had...

coreyspencer
replies: 22 views: 355
Avatar for Rick Dalton
Rick Dalton 1 day ago
Avatar for headrc

Hi, I guess this is where to post regarding this question. Does anyone here have a pinout diagram for the akg C34 and its s24...

headrc
replies: 0 views: 72
Avatar for headrc
headrc 1 day ago
Avatar for Snatchman

Hello..I posted this in another thread I guess it was the wrong one..Anyway, I'm having problems with my HEDD monitors and I'm...

Snatchman
replies: 3 views: 121
Avatar for Thomas W. Bethe
Thomas W. Bethe 1 day ago
Avatar for bamsehopp

Hi, I´m looking for a passive headphone volume attenuator with 3 set levels of volume: quiet, normal and loud. I can´t seem to...

bamsehopp
replies: 0 views: 79
Avatar for bamsehopp
bamsehopp 1 day ago
Avatar for ROSELJR

Can an SS34 Schottky diode be connected in series between the power supply and the ground to prevent reverse connection? as the...

ROSELJR
replies: 1 views: 103
Avatar for Philbo King
Philbo King 2 days ago
Avatar for sirjuxtable

Hey Geekonauts, I have a MOTU 828es - how do I determine the clip level for the A/D input converters? The reason I ask, is...

sirjuxtable
replies: 12 views: 399
Avatar for circusreturn
circusreturn 2 days ago
Avatar for Karloff70

Anyone here ever do that? I have seen peopIe change the sound of korg MiniIogue's for the better and I think I saw someone do it...

Karloff70
replies: 3 views: 121
Avatar for Analogue Mastering
Analogue Mastering 3 days ago
Avatar for craigb

A buddy of mine needs to replace a VU meter in his Drawmer 1960. Drawmer wants $140 for one. Anyone know of a cheaper suitable...

craigb
replies: 2 views: 685
Avatar for CCorcoran
CCorcoran 4 days ago
Avatar for Hoffmanwantsgear

Hi, does anyone have any experience or ideas regarding a Blue Bottle Rocket Stage 2 power supply, the red light turned to green...

Hoffmanwantsgear
replies: 16 views: 2,203
Avatar for sbou
sbou 4 days ago
Avatar for johhnyg

Hello All, I have a Akai DPS 16 that is new to me. When I turn it on it does not find the ATA drive. I have pulled the...

johhnyg
replies: 2 views: 150
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ruffrecords 4 days ago
Avatar for Red Sky

Picked up a used drawmer 1960. Not so stoked on the dull 1D sound of the pres but the compressor has some quality retro flavour...

Red Sky
replies: 18 views: 5,277
Avatar for tmarra
tmarra 4 days ago
Avatar for konstantingroove

Hi everyone! I have recently been tasked to bring our old dusty Ampex AG440B back to life. It's been quietly sitting in the...

konstantingroove
replies: 15 views: 234
Avatar for Jim Williams
Jim Williams 4 days ago
Avatar for Ideasite

I replaced my R0DE NTV Tube with an equivalent GrooveTubes 12AT7 tube. While replacing the tube, I spied 2 adjustable pots on...

Ideasite
replies: 20 views: 2,892
Avatar for Lemon Squeezer
Lemon Squeezer 4 days ago
Avatar for Hoffmanwantsgear

I have a Blue Bottle Rocket Stage 2 which comes with the Powerstream power supply. It employs a soft start feature to avoid...

Hoffmanwantsgear
replies: 3 views: 526
Avatar for Jsharpmusic
Jsharpmusic 5 days ago
Avatar for gearstudent

Hello, If you run one small analog mixer into another (perhaps larger) analog mixer, is that about the same signal quality...

gearstudent
replies: 2 views: 183
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gearstudent 6 days ago
Avatar for Thomas W. Bethe

A client of mine had it and did not want it anymore. It was made in the early 1950s or late 1940s. I have not turned it on but...

Thomas W. Bethe
replies: 8 views: 247
Avatar for kludgeaudio
kludgeaudio 1 week ago
Avatar for johnforrestal

Hi everyone! I know this is a long shot, but would anyone have an idea why this is happening?! I have an older M80 with Jensen...

johnforrestal
replies: 1 views: 108
Avatar for Thomas W. Bethe
Thomas W. Bethe 1 week ago
Avatar for ltemma74

I'm putting together a direct recording studio in my apartment. I have four different tube guitar amp heads that I record with. ...

ltemma74
replies: 18 views: 14,761
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Gearnerd320 1 week ago
Avatar for WanderingScholar

Hello everyone, I recently got a DOD r-870 flanger/double. I believe Its mono in stereo out... however, channel B output just...

WanderingScholar
replies: 0 views: 99
Avatar for WanderingScholar
WanderingScholar 1 week ago
Avatar for fynsta

Hi! I've been using my Tascam TSR8 for a good ten years now and as of last week i've noticed a significant difference in...

fynsta
replies: 10 views: 1,575
Avatar for RetroFunk
RetroFunk 1 week ago
Avatar for SAnthony

I am Looking for Schematics and any available Technical repair Info available on the Alesis Adat XT20. I have 2 of these with the...

SAnthony
replies: 12 views: 11,612
Avatar for claudem68
claudem68 1 week ago
Avatar for trubadoor

Hello, I have microphone preamp power supply with the following pinout over a 10 pin ribbon cable: Pins 1,2 : +25v Pins...

trubadoor
replies: 10 views: 297
Avatar for trubadoor
trubadoor 1 week ago
Avatar for dremelts

I have four xlr mic cables that I am using with AKG D3700 dynamic mics. Two of the cables work fine with phantom power enabled...

dremelts
replies: 33 views: 22,457
Avatar for Arka Mitra
Arka Mitra 1 week ago
Avatar for DaveyJones

Hi all, I currently run an Antelope Audio Orion 32 and MP32 which is basically just two units that run 32 channels of preamps...

DaveyJones
replies: 8 views: 196
Avatar for MediaGary
MediaGary 1 week ago
Avatar for ZRGuitarPickups

Hi there, I recently purchased a DBX 160A online. Upon plugging in the power supply (nothing connected to the 'Input' or...

ZRGuitarPickups
replies: 17 views: 299
Avatar for ZRGuitarPickups
ZRGuitarPickups 1 week ago
Avatar for The Dazzler

Hi, I'm a sadistic gear pig and I like to swim in $h!t and sink my teeth into hot garbage. I have spent the last month mastering...

The Dazzler
replies: 3 views: 231
Avatar for The Dazzler
The Dazzler 1 week ago
Avatar for WanderingScholar

Hello, whenever I turn on phantom power, I get a hum around 50hz. I had this same problem a year ago and I was able to cure it by...

WanderingScholar
replies: 10 views: 234
Avatar for Jim Williams
Jim Williams 1 week ago
Avatar for effitall

I've long thought that the AES/EBU digital cables would be quite good for not only digital interconnects, but also mic/line runs....

effitall
replies: 10 views: 6,784
Avatar for Jim Williams
Jim Williams 1 week ago
Avatar for blueNan

I have read several times that to use a higher slew rate opamp, it may be required to decouple it adding a capacitor connecting...

blueNan
replies: 1 views: 176
Avatar for ripple_fx1
ripple_fx1 1 week ago
Avatar for Aaron W

Hi all, I'm trying to repair my Yamaha SPX90 (Mark 1) power supply. Besides recapping I have noted which other parts need...

Aaron W
replies: 15 views: 3,119
Avatar for Andrew Bacon
Andrew Bacon 1 week ago
Avatar for Thomas W. Bethe

My "April Air" air cleaner for my studio did not seem like it was working. The tech from the HVAC company came out and...

Thomas W. Bethe
replies: 19 views: 377
Avatar for Thomas W. Bethe
Thomas W. Bethe 1 week ago
Avatar for jerberson12

I have a 32 channel mixer It turns on but no sound coming out. I plugged-in my synth output to each of the input channels and...

jerberson12
replies: 11 views: 11,833
Avatar for Thomas W. Bethe
Thomas W. Bethe 1 week ago
Avatar for Dazzerr

Hi folks, Please take a look at the attached pic. Could anyone tell me how pros create these labels for patchbays? I mean, the...

Dazzerr
replies: 13 views: 465
Avatar for originalscottyg
originalscottyg 2 weeks ago
Avatar for bubblebash

I have an FB-01 with pretty bad signal bleed when I assign different sounds to the Left and Right outputs. Makes tracking a bit...

bubblebash
replies: 3 views: 141
Avatar for Thomas W. Bethe
Thomas W. Bethe 2 weeks ago
Avatar for John N

Hi, I recently bought a Sony R7 reverb. I was working upon arrival but had the 'low battery' warning and wouldn't hold anything...

John N
replies: 5 views: 212
Avatar for John N
John N 2 weeks ago
Avatar for travis.farmer

i have acquired a free Leslie Model 110, and i was thinking of adding a plate amp, and an upgraded speaker. i have two ways i...

travis.farmer
replies: 9 views: 304
Avatar for travis.farmer
travis.farmer 2 weeks ago
Avatar for talkboxert

I'm bringing back to life an old Formant, powering it from a doepfer 12v PSU. The tracking on the VCO's is ok, and one of the...

talkboxert
replies: 2 views: 113
Avatar for rez
rez 2 weeks ago
Avatar for Timwaldvogel

People take the transformers out of sm57s and sm58s for studio use. How about my pg48 I have not used in forever? Possibly worth...

Timwaldvogel
replies: 9 views: 3,575
Avatar for xbr
xbr 2 weeks ago
Avatar for Barib110

I just bought an Aston Spirit, used from CeX. It was going for very cheap. The mic seems to work, it sounds pretty good. But if...

Barib110
replies: 5 views: 259
Avatar for Barib110
Barib110 2 weeks ago
Avatar for Uby62

Hi everyone! I need to repair a Ddrum AT module : the trigger inputs are not working and i have distortion on outputs, and the...

Uby62
replies: 17 views: 2,422
Avatar for Uby62
Uby62 2 weeks ago
Avatar for nickolo

I would be very grateful if someone might be able to help.I have searched the net,phoned yamaha electronics and parts companies...

nickolo
replies: 6 views: 5,878
Avatar for Thomas W. Bethe
Thomas W. Bethe 2 weeks ago
Avatar for FeverUSA

The Dynaco SCA-80Q 4-dimensional amp kit was considered high quality in the 70's. Can anyone suggest where a NOS (virgin/mint)...

FeverUSA
replies: 3 views: 157
Avatar for Al Rogers
Al Rogers 2 weeks ago
Avatar for bukarin

I've just bought this Hifi spring reverb which ultimately needs a mod for it to work as a full stereo unit. The problem is that...

bukarin
replies: 13 views: 10,737
Avatar for Radardoug
Radardoug 2 weeks ago

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