RECORDING SCHEMATICS
HIGH END STUDIO MIC PREAMP KITS!
I sell VARIOUS TYPES OF VINTAGE GEAR
MIC PRE, EQ ,COMPS, TUBE and RIBBON MICS
properly redone only..no "raw" stuff here
need a great DEAL on class A discrete? just
CLICK HERE!
QUAD8, NEVE,Telefunken,Millennia,John HARDY,
ADM,RCA, TRIDENT,PULTEC,HELIOS,API,LEXICON,and upgraded new stuff,
RODE ,Bellari, TL audio,Summit, and many others,
my stock changes all the time.
i am HAPPY to modify your gear for you, interesting trades are welcome.
i can SELL your gear for you,if i fully test it, and the price is good.
( i get 30,ooo hits per month these days, from pretty well informed people)
i ALSO modify MICS, including custom re-ribbon, and redesign, update to
some of the tube mics for sale out there, new. IF you havent heard the
RODE classic two with my custom transformer, you are in for a treat.
i have got some amazing results, real air, top end, transients from
reasonably inexpensive RESLO ( the 30/50 ohm units only ) and RCA 74b.
( which is a pretty nasal sounding PA grade mic, compared to the upper end models
i have even done a RCA VARACOUSTIC, which has the smallest ribbon of any i know of.
i use super thin ribbon, cray supercomputer silver/teflon wire, etc.
ALL MY MODULES ARE FULLY REALIZED ..ALL FUNCTIONS TESTED
RECAPPED,,MODDED( where applicable )and then RETESTED,
A D M (USA)( AUDIO DESIGNs and manufacturing )
SOME OF THE ADM gear fixes up VERY NICELY.
SOME have VERY high end discrete op amps, *N1202,
that are as nice as API or JENSEN ( HArdy era) transistor gain blocks.
the stock units have all sorts of other crap in the signal path, though.
they NEED TO BE MODDED to realize modern high end performance
I WILL HAVE NEW STOCK OF ADM, MIC PRE and EQ's SOON, BLACK FACE, EARLY ones!!
220 input module
312 Limiter ( love this stuff, early discrete gain blocks, clear, open sound!)
1312 Limiter ( not as nice as the 312)
501 comp
5501 complete console
668 card amplifier
* please note, 668 is original large architechural diagram...6 pages!
770 equalizer and console channel
780 console channel
* please note, 770 is original large architechural diagram...18 pages!
My current faves for mods:
M1540 4 band eq
MM2783 mic pre
N1202 op amp
AKG
6072 tube sorting/grading circuit
250-251
414
BX10 reverb
BX20 reverb
C12r
C12VR
C24
C28
C 60
C 61
ELA M250 /ELA M251
ELA M250E / ELA M251E
THE TUBE mic
A P I
2520 OP Amp, many versions..the real thing!
2520 applications sheets..mic pre, line amp, phono preamp
212 bt mic preamp
312 mic preamp
3124 voltage doubler phantom supply
325 line amp
500vpr 10 space rack and power supply
512 mic preamp
525 compressor
550 eq schem/ mechanical drawings
550 Wally Heider stability mod
550a and b eq
553 eq
554 eq (rough copy)
560 graphic eq
560b graphic eq
A R T
MPA mic pre (pro mpa)
LEVELAR
DUAL LEVELAR
PRO VLA
NOTE: i can MOD THESE COMPRESSOR UNITS TO SOUND AMAZING!
( burr brown op amps, signal path caps, blackplate tube, ratio tweaking)
(please see also the BELLARI compressor mods)
its is a fairly extensive mod, worth $125 for a mono levelar,
more for the pro or stereo versions, obviously.
they end up as VERY VERY TRANSPARENT for reasonable,
non EFFECT type compression. worth every penny.
I have, for example, directly compared them with the UNIVERSAL AUDIO
powered plugins, and they are as clear, and nice sounding.
they are DIFFERANT from EACH OTHER, however. the best one, for VOICE, to me,
is the lowly LEVELAR mono unit,but the PRO unit is more flexable.
i also change the LIMITER setting to a more musical 4:1..i found
the stock 6:1 produced artifacts, without having more control over
attack/release settings
i have decided i am NOT selling the mod info itself,
these are physically difficult units for a lay person
to work with, due to the plate through boards, and
finicky nature of the ribbon connectors internally.
if you havent worked with these before, you will
no doubt find em a HUGE pain in the ass...its hard
to remove things, even with solder wick.
REALLY, you need a commercial desoldering unit, to do it easily.../
AKAI
M8 reel to reel( also known as ROBERTS 770x)
MODEL 900 REEL TO REEL
ALLEN and HEATH
MIX wizard input channel
AMEK
9098 rupert neve EQ
Einstien console mic pre
Mozart mic in, eq,stereo in
ALEMBIC
F 2B stereo preamp
ALLISON RESEARCH
Kepex 500 gate
ALTEC
336b compr
338a c - comp
428b line amp
429b MIC pre
436 a b c comp amp
438A comp/ mic pre
444b comp
459a mic pre
1556a
1561a
1561b equalizer
1563a
1566/1566a - mic/line pre
1567/1567a -4 chan mixer
1591a ss comp
1594a mix amp
1607 mixer amp
1674&1678 operation manual
9470A mic preamp
9475a preamp
M-20 "Lipstick" tube mic
P522b power supply
AMPEX
*NEW: rare AMPEX NUVISTOR mic preamp,
USES 6cw4 ! mr70 model..
350
350-2
350-3
351
358 mixer
600
601
602, / 602-2
620
622 -mono monitor speaker/amp
2010
2012
!!!!my personal favorite nearfield monitor, small pa amps!!!!
*note: after much research, I found that the KILLER CIRCUIT
is the one with the EF86 front end, and the EQ network to be on the FEEDBACK,
After the speaker, not before the input.
The differance between the circuits is AMAZING...
you find the good circuit on some of the earliest amps,
and DEFINATELY after the 622, into the 2000 series.
this amp is my all time favorite acoustic guitar
amp, and VOCAL live pa amp, if you can live with 20 watts.
i sometimes put up 4 of them, or one per performer,
physically placing them BEHIND each person, making the performer
a blind for the mic they are using...the sound appears to come from
the PERFORMER themselves, only LOUDER..and you can use great sounding mics..
as long as you remember to turn them DOWN when the performer isnt between the
speaker and the mic...
they have a detail, and tonal quality that NO powered monitor these days can touch.
they have a special JBL speaker , and internal active EQ to extend the frequency range,
and some interesting compression.
This circuit carried on into the later models as well..
they tried differant porting, and even a tweeter in the later models.
i found that the PORT was a good idea, it helped tame some handle rattles.
but ANY of these units, port or no, sound great to me..
they are pretty easy to fix up..and its possible to change the circuit to the good one
but its a bit more work than simply upgrading caps, etc..
if you have any of these that want to find a good home, let me know.
i was recently able to aquire some new info, which has the design
philosphy and circuit ideas of the designers..as well as the usual sales blurbs...
cool stuff.
3671 mixer
MX 10 l MIC MIXER
MX35 mixer
PR-10 mic preamp, tape bias/front end
APHEX
107 mic pre
109 EQ
659 expressor
CX11 compressor
EQF-2
ARP
2600 patch synth SERVICE MANUAL,
and schematics..some HAND DRAWN by original designer!
A W A
S500 series console, 66495 dual input module
Cool stuff, like neve, but 16 effx sends!
ASHLEY
pq 571 / 572 parametric eq
AUDIMATION CORP
P300 P400 LED METERING CIRCUIT
AUDIO and DESIGN RECORDING( A. D. R.
)
E900 sweep equalizer
F760 compex limiter
Gemini compressor
VOCAL - stressor
AUDIO INSTRUMENT CO.
SK 1010 TAPE REVERB
AUDIX
MXT 1000 mixer (fully discrete, 3 band eq, compressor on every channel...FULL
MANUAL)
built by ex neve designer,neve trannies
AURICON
NR 25 a7 sound on film mic preampB>
AUSTRALIAN BROADCAST COMMISION
TRIMAX 1966 tube MIC PRE
B B C ( British broadcast commission )
AM 6-3 ( limiter, germanium )
AM 6-7 ( limiters, silicon, early lookahead circuit)
B S S ( Brooke Siren systems)
310
318
916 MIC PRE / EQ
splitter
Comp - de-essor
Dpr-504 gate
Dpr 402 meter circuit
TCS 803 / 804 timebase corrector
BARCUS BERRY
1510,1520 preamp
1724,1730,1740 AMPS
383 Bass pre
386 Guitar pre
Matchmaker D.I. box -my
fave.. great speaker sim for guitar amps!!
MP743 Mic pre
XLS prea
BELLARI
ADB3 di
LA120 comp
MP105
MP110 mic pre
RP220- mic pre
RP503
RP533
RP520- mic preamp
RP583 comp
VP129
I HAVE JUST FINISHED figuring out my mods to the RP583 compressor,
and comparing it to ART VLA PRO and LEVELAR modified units.
i think the BELLARI is the clear winner, because of several factors.
the CHIPS are allready socketed, so mod easily. the CAPS in the signal path
are allready polyprop, for the TUBE path.
and the topography allows for some important options.. attack and release controls
are excellent, i like the VUE GR metering, and if yougo in the UNBALANCED input,
you go right into the tube stages, run at high voltage, direct.
i take the OUTPUT from the tube stages, and split it into a TRANSFORMER balanced output,
and also upgrade the OP AMP unbalanced output, so you have the choice of sound types.
i also recently aquired a large amount of REALLY nice knobs from hafler surplus,
which make the finished unit look like a rEQUISITE compressor..and add to the " FEEL "
Depending on TRANSFORMER type, and TUBE type, and how large you make the input cap
to the TUBE stage, you can get a large range of voicing options with this unit.
all in all, my new favorite upgraded compressor.
GO TO BELLARI WEB
SITE!!
BI AMP
EQ 220
EQ 290
OEM AMP
T 1000 AMP
XA 100 MOS FET AMP
XA 1000 amp board
BINSON
ECHOREC 2 tape echo
be warned, this is a TERRIBLE copy..
anyone got more binson?
BLONDER-TONGUE
AUDIO BATON
10 band TUBE graphicEQ!!!
BROCINER ELECTRONICS LABS
A100-p EQ
C. A. D. (CTI AUDIO)
Equitek E-200 mic
C. B. S. LABORATORIES
AUDIMAX 2 and 3
AUDIMAX 3 444
AUDIMAX 3s 445
*note: i have the SO rare MEMORY UNIT schematic!
if you need one, you KNOW what i mean!
also, the stereo adapter!
Volumax
FM VOLUMAX 410
FM stereo VOLUMAX 411
CALREC
PQ 14s channel strip
( these older ones are the neve like ones)
1061 channel strip
( these ones are more like quad8)
anyone GOT any?
1347 (and now we devo into the chip world, sigh)
CARVIN
FET 900/400
SX PRE
COLLINS RADIO CORP
26U-1 peak Limiting amplifier (vari-mu type)
26J-1 Limiting amplifier
356e LIMITER
CREST
CROWN
800 TAPE DECK
D O D
R 825 comp
DBX
160 comp, includes complete factory setup manual
161 compressor
166 compressor ( full manual, pdf schematic)
163x test proceedure
266 setup proceedure
902 de-esser
903
904
911
929
933
D R ELECTRONICA
PA_6 16 CHANNEL TUBE MIXER , WITH EQ..ETC...
DATAMIX
THE ELECTRIC LADYLAND CONSOLE...and unauthorized
stolen CLONES, even, made from stuff from the EL back room!
you can maybe fix your modules, but you have to find the
still existing holder of the information.
( he doesnt understand a site like mine..)
maybe you can find him, or he will let me email link to him from here..
time will tell.
DISA
Standard amplifier ( mic pre) 91B21
(*unit uses cross coupled cathodes,
on fully dif circuit for gain control!)
91N02 vari mu compressor
(*same front end tubes as Fairchild 670!)
DYNACORD
275 / ec s 75 mixer tape echo
Echocord S61
Echocord S62
Echocord S62a
Echocord S65
Echo King tape echo
Eminent 2
Eminent 4 channel tube PA.
E.A.R.
825 tube eq
660 Fairchild compressor spinoff
E.M.I.
REDD 47 tube preamp
and,..in solid state:
THE BEATLES CONSOLE..yes, thats right.
the REAL THING....from the ORIGINAL DRAWINGS!!
i believe this was a redd 37, and i have the orignal USER manual
for this console, as well.....
E.M.L. (Electronic music labs)
eml 200 WAVESHAPER
sample and hold
VCA
VCO
Noise generator
Master oscillator
Ring modulator
?
MIC preamp
reverb
effects sampler
low pass filter
HI pass filter
ECHOPLEX
Echoplex Tape echo effect unit
EP 1 model #5000
EP 2 serial #'s 2750-5499
EKMILLER
W86 passive hi low eq
w95 active eq
ELECTROVOICE
( E.V.
)
Model 380 10db attenuator (nice little inline H pad)
Model 513 100hz hi pass filter (nice little passive inline)
E M T
162 ss plate reverb
156 comp
140 Plate Reverb unit, full manuals, all versions
V-54 TUBE PLATE reverb
FAIRCHILD
627 tube eq..very interesting T networks
660
661 auto ten optical limiter
662 preamp
663 compressor
666
670 stereo COMP/ LIMITER ($25,000 US for this
baby)..SAVE THE LONG GREEN and
MAKE ONE!
FARNSWORTH
PUBLIC ADDRESS MIC PREAMPLIFIER
*cool circuit, 3 x 6sn7, in push pull...
model P-552XE-1
FILTEK ( B F E )
M K universal filter unit, EQ, filters
FOCUSRITE
SORRY FOCUSRITE IS NO LONGER AVAILABLE, they asked
ME TO REMOVE THIER SCHEMATICS FROM MY SITE.
(i wouldnt want techies to know this stuff either)
..5532 chips as a mic pre? EEEEEEEEWWWWW
G M L
8201b eq
8202 gain block
8203 eq
GATES
M-5000 (pwr3) power supply
M 5215 printed chassis amp
M 5233
M 5233a
M 5233b
M 5233c
M 5315
M 5567 cue amp ( yard console )
M 5568a booster amp
M6144 dual peak limiter ( tube, dual mono, WOW )
SA39b limiter amplifier,
SA70,71,72 TUBE MIC PREAMP
STA LEVEL comp
LEVEL DEVIL compressor
Stereo producerCONSOLE (solid state)
GENERAL ELECTRIC
BA5a limiting amplifier
GOTHAM AUDIO CORPORATION
V 54 stereo drive and playback amplifier
GREAT RIVER ELECTRONICS
GreatRiver
Electronics web site
mp2, mp4 mic pre amp
GROOVE TUBES
EQ1 tube Equalizer
MD2 tube mic
MD2a tube mic
MD3a tube mic
MP1 tube mic preamp and power supply
PS2a mic power supply
HAMMOND
B3
C3
PR 20 multi band reverb amp(tone cabinet)
L-100
*note..i have full service manual for the L line..includes:
L-100, L100A, L100-1, L100-2, L200
this info is AMAZING, covers all sorts of generic hammond
servicing tips..all about the drawbar , tone systems, percussion,
vibrato, etc. a WEALTH of hammond info, any one wishing to UNDERSTAND thier
organ, would do WELL to read this. lots of possible tweaks!
i just picked up a fairly advanced model hammond, with all the percussion,
and built in LESLIE, and will be fooling around with this stuff..
JOHN HARDY
MPC1 mic pre
MIC PRE AND 4 band EQ
tryem with the new Millenia 990 op amp!
HELIOS
5949 mic preamp card
INPUT channel strip ,
with MIc pre and EQ from ISLANDand OLYMPIC consoles
Silverface channel, pin outs..OLYMPIC, stones mobile
KPM console schems ( brown and blackface)
HOHNER
ORGAPHON 60MHBR
J.B.L. PROFESSIONAL
5233A FREQUENCY DIVIDING NETWORK
5235A FREQUENCY DIVIDING NETWORK
5330 MICROPHONE MIXER
5547A & 5549A 1/3 OCTAVE EQUALIZERS
6215 AMPLIFIER
6230 & 6260 AMPLIFIERS
6290 AMPLIFIER
7110 LIMITER/COMPRESSOR
JENSEN
JT 10K61-1M -DI/ LINE AMP
JENSEN 990 op amp( with pc layout )
JOE MEEK
VC 1 Q preamp and meekqualizer
KLEMPT
ECHOLETTE tape echo unit
full manual!
L A AUDIO
424 mic pre 1 x 4 splitter
EQ2 parametric eq
LANGEVIN
101 mono block amp
119a PROGAR vari mu limiter..WOW!
128x
5116 mic pre
5116B mic preamp
5117
AM 16 mic pre --Solid state,fully balanced
AM 17 mic pre --Solid state,fully balanced
AM 5301 program limiter
LAWSON
L-47MP Gold
LESLIE
122
145,147 r
251 two channel amp
860
061440 reverb amp
LEVERS-RICH EQUIPMENT LTD
Graphic equalizer A/501/T
this is a KILLER;discrete unit..... anyone SELLING;ONE?
M C I
400a /MIXING console
JC600 mixing console
( discrete
op amp not shown, use API or Millennia 990)
MAESTRO
MAESTRO AMP
ECHOPLEX tape ECHO MAESTRO FUZZ
MEASTRO FZ-1, FZ1a fuzz pedals (rolling stones satisfaction)
MAESTRO STEREO AMP
MAESTRO STEREO 30(ga78RV)
MANLEY
referance CARDIOID mic
c24 tube mic, and boom mounted mic preamp
DUAL MONO mic preamp
manley Pultec type EQ ( no inductor section, yet)
Massive Passive ( audio amps only, no inductor section yet)
*who knew they used BURR BROWN INPUT STAGE? i dont get it...
why dumb it down to a TL audio?
vari-mu compressor , early (12bh7, tube voltage regulator)
vari-mu compressor , later version ( 6k8,12ax7,7044)
MARTIN
CLAVIOLINE TUBE KEYBOARD
RODGER MAYER
R M 68 noise gate
McCURDY
AT 242 line preamp
AT 242A Mic Preamp
IM7801 input module
*note, this is the MOST ADVANCED recording gear
ever designed in CANADA.. i am interested in ANY more
information about this era of McCurdy..48 volt,
all discrete, huge input transformer, this rivals Helios's best!
it also routinely catches FIRE, but thats an easy fix..
if it doesnt spread to all the tantelum caps..(grin)
*see also hi fi list for tube amps
MELCOR
this is reputed to be PRE api stuff,
designed by the same engineers.
sure LOOKS like it, circuit wise. Nice stuff.
AE20 switchable frequency EQ
GME20 eq
CL20 COmpressor
i also have lots of LIT on this brand, some tech
stuff in it...not much though.
MOOG
304a parametric EQ
903a random signal source
904a lo pass filter
904b hi pass filter
904c voltage controlled FILTER
912 envelope follower
MICROTECH GEFELL
UM 92.1s
N T P
MIC PRE AND LIMITER 179 270
NAGRA
4.2 pro tape machine, mic preamp circuits,
and related paged from manual.
NEUMANN
cmv563 mic
H481 tone generator pinouts/data only
HTS 600 HIGH/LO PASS FILTER(SOLID STATE)
KM54a mic
KM56c mic
KM83, KM84, KM85, SRM84
KM86
KM88
M49 MIC
M49b mic
M49c mic
M249b mic
M249C mic
NKMa power supply
NN48hu-930-00 power supply, for 249 mic
OA10 op amp and applications
PV 76 MICROPHONE PREAMP (SOLID STATE)
PEV 930 HIGH LO PRESENCE EQ(SOLID STATE)
PEV 930 b EQ
TEV 3 band EQ
U47 MIC
U47 FET MIC + power supply
U48 MIC
U67 MIC+ power supply
U87
U87ai
U87p
U87i
U87ip
U89
V476 mic pre
VCA 101
NEVE
TUBE:
NEVE TUBE 10 channel mixing console....1961 vintage
GERMANIUM:
1055 channel amp mic pre, 3 fixed band eq, excellent hf shelf
1057 channel amp, mic pre, 3 band variable eq..
1058 channel amp - mic pre, 3 band but, switchable frequencies like 1073
SILICON:
1063 mic pre eq
1064 /1064a mic pre, eq
1073--- MIC PRE, and 3 band EQ..
1079
1081 gold channel
1272--- MIC/LINE PRE AMP
1279 combining amp
1290 mic amp
2252 -COMPRESSOR
2254/A -- COMPRESSOR amp
2254/A TO 2254/E modification
2264 (475 compressor board)
3115 /33115 / 33115a console channel- mic pre/eq, etc
3314, 33609 (475 compressor board)
33608a width module, pin connections only
3405 - MIC PRE, EQ
34128 mic pre, eq, op amp stuff
CARDS:
ID601 direct input module (two mic preamps..discrete, uses B238 cards)
BA236 talkback compressor
401--- Distribution amplifier(uses BA338 and BA340 discrete amp modules)
402--- Line amp (uses Ba338 discrete amp modules)
438 - Signal amp
(475 compressor board)
10880 eq unit
10885 limiter
VR SERIES
CONSOLE;MANUALS:
PSM8/2 portable mixing console manual
(yike! logic controls! neat littleunit though)
542 broadcast console
8014 -16 CHANNEL MIXER
(includes 1076,1272,2254/a,
E mod for compressor, inductor info, and transformer info)
8048 -32/24 mixer
(includes 1081, 1963,1964, 401,402,405, 2074, 2076,
2254e)
NORTRONICS
PL100 -audio playback amplifer - usually used with tube
ampex 351
ORBAN
111B spring reverb
222a spacial expander (missing module)
412a, 414a Limiter (missing TIMING MODULE)
621 parametric eq...(one incomplete gain block)
622 eq
672A
PEAVEY
Mk 3 mixer
Mk4 mixer
VMP-2 mic pre/ hi/lo eq
Valverb tube reverb/tremolo unit
Valvex 6 chanl stereo TUBE line mixer ( hi z out
!??!
TMP mic pre ( this new unit is GREAT for mods ))
PHASE LINEAR
400 power amp
700 power amp
*these are FULL Service manuals
PHILLIPS
PROSONUS
MP20 fet mic pre
PULTEC
EQ2H equalizer( no inductor values shown)
EQP-1a ( king of tube EQ )
EQP-1A3 ( spec sheet only)
EQP-1R
HLF-3
MAVEC (micpre/eq)(spec sheet only)
MB1 , one of the BEST vintage tube preamps!!!
MEQ-5 ( king of tube MID eq )
SP3 stereo TUBE MIXER....
NOTE: these are COMPLETE with full inductor section shown!
(reverse engineered, model tested, and built, compared with the real thing.
OFTEN the pultec eq is passive, and can be built, and used , with
any gain stage you may have allready..for example, build the passive
eqp1a, then put it BETWEEN your mic pre and eq..make up the gain, between
those devices, and Simplify, improve, your transient fidelity!
PURPLE AUDIO
MC 76 compressor ( urei 1176 takeoff )
PYE
5751/00 ,01 CLASS A COMP
QUAD EIGHT / WESTREX
QUAD 8 went through MANY differant phases, with many differant
engineers..they are NOT ALL THE SAME, some models are among the finest
analog recording equipment ever built...
First, the boring later stuff:
248 mic/line eq
CORONADO mic pre, input
CORONADO eq
CL22 compressor/limitor
GRAPHIC eq
PARAMETRIC eq
STANDARD eq
AND NOW: the GOOD STUFF!!
THIS IS, in my opinion, some of the best VINTAGE recording equipment
EVER MADE! used by MOTOWN, CAPITOL, UNITED, WARNER, the MGM GRAND, etc etc
I use these as the heart of my studio..they have over TWICE ! the
headroom of NEVE (+/-28volt power supply) and use various generations
of discrete class A amps, including DEANE JENSEN's 990 discrete op amp.
there is ONE CAP in the signal path,per gain stage,ROOM FOR POLYPROPALINE
and where a NEVE would have 5 gain stages from end to end, these can have TWO!
Its worth noting, that the TOP analog gear on todays market uses HIGH VOLTAGE rails,
Avalon, Millennia, Great river, GML, Martech, Crane song,and of course all the tube stuff.
True, the eq's only have 12db+/-, but its ALL totally musical....
I somtimes have mic pre, eq, graphics for sale, in limited quantities..
at prices that make VERY GOOD sense, compared with ( avalon, millennia, gml, great river, etc)
when these units are recapped, signal path caps speeded up with polyprop, they
compare favourably to the best current high end analog..better by a ways,
in my opinion, than most vintage. i use a lot of it, in my own studios.
when you ACTUALLY check out american audio history, you will find QUAD 8,
more often than not, in the VERY TOP STUDIOS...ESPECIALLY for FILM.
Neve , API, Trident, etc are excellent, for sure, but you would be suprized if you listen to Q8..
THE MODELS I HAVE EXPERIENCE WITH MODDING, and schematics for:
AM 10 class A discrete op amp
CA27 dual line amp cards, summing amps
CA127 dual amp cards
CA227 mic preamp card
MM61 ( MOtown two band switchable frequency EQ, and mic preamp)
MM62 ( later model, with am4 amps, as above, from MGM GRAND)
MM71 mic pre, eq
MM100 ( Discrete three amp preamp, mods to excellent mic pre, with active balanced out)
MM312bl Mixer module ( eq/ mic pre)
?
MM312 a-s 3 band eq, with switched frequencies
(modded for seperate mic pre and more eq features)
712 7 band graphic eq ( easy to add frequency switches)
MM403 mixer channel ( mic pre, eq)
MM405 mixer channal ( mic pre, eq)<
MM441 ( 4 channel mic mixers, easy to mod to 4 seperate preamps per unit )
Master flow chart for the MGM grand mixer..
TFB 200 power amp (6JE6output tubes, driven by a solid state front end.)
I spent a good amount of time on some of these schematics, restoring them,
and documenting all my mods..in full colour, to a degree that would make the best
vintage drafts people smile..this takes a LONG TIME, to do properly.
i dont want to sell my MOD info, but i would be HAPPY to mod your units,
if you are lucky enough to find them.
RCA
LET ME RE-RIBBON your vintage RCA mics!!
(note, i only do the less expensive ones..but so far,
i have noticed MASSIVE improvements in inexpensive models
like 74b when replacing the heavy original ribbon with super
THIN ones..
most recently, i have tackled the VARACOUSTIC,it has one of the
SMALLEST ribbons ever, and had no problems.
PLEASE VISIT this WONDERFULL RCA MIC COLLECTORS SITE!!
85 B1 Microphone preamp
AM 224A/U - military version of the OP-6
BA 1 (mi-11218a)
BA 1A (MI-11218a / P-172381-3) mic preamp
BA 3C program amp
BA 4C monitor recording amp
BA 5A limiting amplifier
BA 6A Limiting amplifier
(Jimmy Page's acoustic sound...)
BA 6B limiting amp (mi-11225-b)
BA 6C limiting amp (mi-11225-c)
BA 11A preamplifier
BA 21A preamp
BA 23A Program amp..(same as MI-591246-a or MI-111246-A)
BA 24A Monitor amp
BA 25A auto gain control program amp
BA 31A preamp
BA 33b ( center slice of schematic missing )
BA45 opto compressor
BA46 FET compressor
BA71-c preamplifier(mi-11658b)
BA 73A program amp
BC 2B mic preamp , UTC LS transformer$
BC 6B mic pre, console ( part console info )
BC 7A ( picture only, and line amp ba73a)
BN 2A portable mic pre/mixer
OP 6 Portable remote amplifier ..pentode
RC199 transcriber amplifier
MI-9975 monitor amp
MI-10234c Compressor AMPLIFIER (vari mu)
Mi-11207a Mic preamplifier
and MIC info for: 44b,44bx,4aa,50a,74b,77a,77b
77c,77d,77dx,88a,auropressure,junior velocity,ku2a,pb115_30a
rp91, and Varacoustic....
PLEASE NOTE, these schematics are available on the site linked at the
top of the RCA list! i will supply them only in the event of that site
being closed...
R. F. T.
anyone have the Kv800 module schematic?
unknown model tube preamp, uses 2 x ef12 tubes
CM 7151 Leipzig bottle mic
RANE
PI 14 Pseudoaccoustic Infector
SM82 mixer
RAYTHEON
RL-10 Vari MU tube compressor
REBIS
RA204 parametric eq
RESLO (RESLOSOUND, FEN-TONE corporation)
information on ALL RESLO RIBBON MICROPHONES:
RBL, RBM, RBS , RBY , RBH...wiring info..
ALSO, these units has FABRIC "pads" used for pattern control,
proximity filters, etc..love to SEE some, they worked GREAT.
*these are woNDERFULL MICS, and can be modified
for balanced output, making them quiet enough
for use in modern studios...
I can do this mod. I am also interested in buying a couple
more of these mics for my own studio...
anyone? swaps OK, pairs GREAT!
i understand you can still get the replacement ribbons,
apparently available as a pre built frame..i would
love to know WHERE, if anyone has the info.
these are one of the thinnest i have ever seen,
not sure about the thickness, love to find out.
RHODES ( Fender )
80 watt suitcase AMP /keyboard unit
REVOX / STUDER
Studera a-87 console COMPRESSOR
Studer a-87 console EQUALIZER
Studer a-87console MIC PRE
C37p tube tape playback electronics
C37r tube tape record electronics
g-36 TUBE stereo reel to reel
STUDER A-87 studio mixing desk...
RODE
I started using RODE mics long time agon, when they
first came out with the NT2...they are EXCELLENT mics,
and NOW, with the new models, represent the best real value
in tube mics, in my opinion..there is a HUGE differance
between the CHEAP chinese condensers, and the RODE models..
i have worked with RODE, and know the circuits inside thier mics,
and while i cannot disclose them, i can say they are WORLDS above
the power supplies, and components used in many VERY expensive
vintage classics.
They also manage to VOICE the mics to have a SIMILAR signature,
across the product line, even though from an ELECTRONIC standpoint,
the models represent MANY differant advance designs, and this is NOT
an easy thing to do.
this is where we differ in opinion, i would , instead, concentrate on
exploiting and expanding on DIFFERANCES between designs...in fact, my
mods for rode mics involve this ..and updating for performance, in general
WHERE POSSIBLE, at all. THey are pretty much stateof the art, in build
quality, power supply design, capsules are amazing...buttt...
my MAIN referance mics are a pair of CLASSIC TWO, which have the wonderfull
remote pattern switching, which gives possibilities that you simply have
to hear to appreciate. I must ADD though, that i DIFFER in opinion
with RODE about some transformer and component choices, because i
have heard things they havent, as yet. I changed the transformer on my
classic TWO, for the one i have custom wound for me, and use on my mic pre
kit, tube headphone amps, etc..and the differance is simply NOT TO BE BELIEVED.
I have compared the result of this with the top models of NEUMANN and BRAUNER,
LAWSON, DPA, TELEFUNKEN, AKG,etc...and they have become my referance standard
They recently sent me an NTK model, which has a solid state output, and 6dj8 FAMILY
of tube..I found it had similar voicing to the classic two, in its stock form, but
had a GLARE, and a lot of compression, that i simply couldnt live with, having
been spoiled by the performance of the admittedly much more expensive classic TWO.
Since there was no transformer to upgrade, i was limited to upgrading the capacitors
that couple the signal path, but the BIGGEST CHANGE was changing the Tube..
I have a good selection of all brands of vintage tubes, in many types, and as there is
no black plate vintage equivelent of the 6dj8, i chose to try to go with revoicing the mic
and found an NOS type which gives INCREDABLE change to the mic...SILKY , featheRy top end,
like some of the finest ribbons in my collection, but with the slight presence boost you get
with condenser capsules, and suprizingly, a HUGE reduction in the compression i was hearing
with the stock mic.
HOwever, my TRANSFORMER mod to the CLASSIC TWO, make it the TOP MIC i have heard, at any price.
its NOT that expensive for me to do, for you..but , sadly, its a one way trip. i cannot always save
the original transformer..so, its a huge leap of faith, unless you can actually COME to my studio, and
hear the differance for yourself. I did extensive audio testing, between the STOCK and MODIFIED unit, and
there is NO comparison.
ROYER
U-47 mic conversion information..
turn those inexpensive Marshall mics
into a decent tube condenser...!
SCHOEPS
CMT 30F Electrostatic mic
SIEMENS
W295B eq, NICE UNIT!
SENNHEISER
421 mic
mkh 30 mic
mkh 105 mic
mkh 405 mic
SHURE BROS
M62 audio level controller (op manual, no schem)
SM7 studio mic
SLAP BACK AUDIO
Sonic Sintillator (a brit odd ball exciter)
Alan SMART
C2 Comp
SOLID STATE LOGIC
E series EQ section from ??, early version
G series EQ section from ??, early version
C1 alan smart compressor
611g series channel strip
4056 E series Dynamics section from console
4056 E series EQ section from later version
4056 E series Mic and line amp sections
9000j mic pre, eq, comp
FX G384 (compressor) manual/schem
mic pre T82241-71
channel amp T82241-71
Quad buss mix amps, side chain,patch returns, vca T82026-71
compressor time constants, quad fader, autofader T82027-71
dynamics T82010-71
SONTEC
MEP 250 A, this is the early GML unit..nice!
SONY
C37a tube mic
SOUND CITY
L/B120 200w mono
SOUNDCRAFT
400B mic pre / eq
500 mic pre /eq
600 mic pre /eq
800b mic pre /eq
FOLIO 4 mic pre/ eq
Series 2 ( all discrete 1)
SPIRIT LIVE ( input and mains sections )
SPIRIT LIVE 4 ( all)
SOUND WORKSHOP
LOGEX mixing console input stip
SPECTRA-SONICS
*ah yes..the console that mixed led zep 3....
101 gain block
610 compressor
STUDIOMASTER
Parametric EQ
SUMMIT
DCL200 comp
EQP 200a EQ
EQF 100
TLA 100a
TPA 200a
SYMMETRIX
525 compressor
551 4 baND PARAMETRIC
T C Electronics
1140 studio parametric eq
Chorus / Flanger pedal
Phaser tc12
Preamp pedal
Sustain Parametric Equalizer
T L AUDIO
NOTE: i can MASSIVELY IMPROVE these types of chip/tube hybrid
UNITS, i do it all the time..they are great buys, if your goal
is to improve them...i do both TRANSFORMER replacements for op amp
circuits, or up amp and capactitor upgrades, and tube stage mods...
5051
blue mic pre/Tube D.I. mp1?
blue mic preamp/VALVE COMPRESSOR C1 model
blue mic preamp/ TUBE EQ eq1?
EQ2 tube parametric ( first model )
Pentode mic preamp
TL 8/2 VALVE MIXING CONSOLE
indigo 2011 tube eq
indigo 3011 tube eq
indigo 3012 tube eq
chip i/0 again...oh well...at least these are cheaper , used...good MOD candidates
TAB
TAB V 81 mic preamp
TAB V 376 Mic preamp
TAB W 383
TAB W 395 eq
TAB VARICOM compressor
TBG e601 mic pre
TAC
1682 console mic pre and eq
Scorpion full manual and schematic
Matchless console schematic
TANDBERG
REEL to REEL...7
TELEFUNKEN
EL 6411
ELA v 1145
U 23 COMPRESSOR (with manual, in GERMAN only!)
U 47 m mic
U 73 COMPRESSOR (as above.)
V 41 mic preamp
V 276
V 376
V 672 mic pre, (*mid/side recording matrix)
V 676 ss mic pre
V 72 -tube mic pre
V 73 -monitor amp
V 74A -tube mic mixer
V 75 -4 channel mic pre, and monitor amp
V 76 -tube mic pre
V 76-s tube mic pre
V 78
V 81
V 103
V 276 mic preamp
V 376 mic preamp
V 1145
W 695a eq
TRIAD TRANSFORMERS
TR57 General catalog for AUDIO TRANSFORMERS
this covers pretty much ALL of the production transformers,
as used in Pultec, etc..high end audio pieces.
I was suprized to find out that some of thier mid size
models were triple shielded like UTC linear standard..
also, had AMAZING bandwidth..the upper triads have a VERY CLEAR
tonality, not WARM, fuzzy like mid grade utc..more nickle in the
core, i imagine...
TRIDENT
A range mic preamp and EQ
B range mic preamp and EQ
*anyone selling any? i need a few more to complete a mixer..
***anyone have the B range compressor schematic? i have pin outs only..i have a couple...
series 80 input channel( mic pre, eq)
CB9146 stereo compressor
VFM system mixer ( this is where it thins out, into the sorta souncraftish stuff)
TRIMAX
A63 PENTODE MIC PRE
A65 TUBE LINE AMP
S75 POWER CONVERTER
TUBE TECH
CL 1b compressor unit..complete but for the "Gain
reduction element"
EQ 1a "pultec" type EQ ...nice, less signal path trannies!
EQ 1am "pultec" type EQ ...full service manuals, schematics for
both EQ's
*please note that for NOW, i dont yet have the 3 multitap inductor values
for the eq's...
LCA 2A Compressor ..(varimu..Fairchild like, but with SS gain control)
LCA 2B Compressor unit ( as above, but updated VCA stability
MP1 mic pre
MEQ 1a pultec type mid eq
FULL sevice manuals and schematics
PE1a pultec type eq
now THESE;GUYS;make TUBE;GEAR!
UNIVERSAL AUDIO
100d -microphone pre-amp
1016-b line amp
101D -mic /line amp
100d eq
175 limiting amplifier
175a limiting amplifier
175b limiting amplifier
176 limiting amplifier
177 varimu comp
546 dual paramteric eq (full manual)
1006(c-106) mic preamp
1008a - mic preamp
1016-b (c-100) mic preamp
* I LIKE THESE THINGS...ahead of thier time for tube mic preamps
UHER
4000 Report
*** the older GERMANIUM units make poor man's
NEVE 1054 mic preamps,
watch for the + ground,!!
also, these are great sources of germanium transistors for fuzz face's...
4400 Report MONITOR
...
UREI
527 graphic eq
533 graphic eq
535 Dual graphic eq
537 graphic eq
545 parametric eq
565 little dipper
1109 mic pre
1176 revision A (serial # 101 - 216)
1176 revision B (serial # 217 - 1078)
1176LN revision C (serial # 1079 - 1238)
1176LN revision D (serial # 1239 - 2331)
1176LN revision E (serial # 2332 - 2610)
1176LN revision F (serial # 2611 - 7052)
1176LN revision G (serial # 7053 - 7651)
1176LN revision H (serial # 7652 - onwards)
1176LN revision J
1176LN revision K
1178 stereo compressor
1600 broadcast consoles
1620 music mixer
7510A auto mic mixer
7510B auto mic mixer
BL40 Modulimiter
LA2a leveling amp
LA3a leveling amp
LA4 comp / limiter( blackface,846 opamps )
LA4 comp / limiter( silverface, 4136 op amps)
LA5 audio leveler
LA10 comp /limiter
LA12 comp /limiter
LA22 comp /limiter
VALLEY PEOPLE
400 mic processor
DYNA MIC mic preamp/eq
GAIN BRAIN -gate..
G201 Gatex 4 channel gate
TRANSAMP gain block
VICTOR ANIMATOGRAPH
MODEL 40B
YOWSA ! the best guitar speaker in the WORLD....anyone got any to sell?
VORTEXION ltd. (Wimbledon)
four way electronic mixer nice pentode tube mic preamps!!
...
WARD BECK
LA 460 input module
M460L input module
M462 Limiter/compressor
M462/A Limiter/compressor
M462/B Limiter/compressor
M464 Limiter/compressor
M466 Limiter/compressor
M467 Limiter/compressor
M466M meter module (pin connectors only)
m470 MODULE, with or without my mods
M472 EQ module
M522 EQ
M522A EQ
connector pin outs for:M470,M466,M466c,M462,M462a,M462b,M472
WATKINS
COPYCAT TUBE TAPE ECHO UNIT
WESTERN
ELECTRIC
86a
87a
141 A LINE AMP (GREAT PHONES AMP!)
142a amp
201b noise generator
1126 KOIN Pentagrid Limiting Amp
WESTREX
RA-1593 COMPRESSOR
WURLITZER
140b electric piano
680 electric piano
XTA Electronics
GQ 600 dual 30 graphic eq
DIY..............led meter
email for details / pin outs / subs suggestions....
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