Monday, 16 October 2017

Electro-Harmonix Time line.

I have started building a collection of EHX pedals. It's a great company with an illustrious history.
This is a brief timeline of their products.
It's by no means the most extensive list but I hope it can grow over the coming years and be useful
to anyone wanting to discover their drums, pedal, stompboxes and circuits.
Please let me know if there are any mistakes or omissions.

++The company was founded by Mike Matthews in NYC.
++The Axis fuzz pedal (Guild Guitar Company)
++Foxey Lady Pedal (Guild Guitar Company)

++LPB-1 Linear Power Booster.
++Big Muff Pi (First edition on perf board)
++Treble Booster  - Screaming Tree ?
++Bass Booster - Mole
++Muff Fuzz (EH2008 and 2009)

++Electro Harmonix “triangle” Big Muff  . Version 1
    These date from 1969 to 1973. (EH3003)
++ Foxey Lady V4. Three knob version. 
     A rebranded Big Muff V1 made by Electro-Harmonix for Guild.

++ Little Muff Pi (EH-1008).
     This transistor version was replaced with an op-amp version in 1975-76. 

++EH Freedom Amplifier 
++Little Muff Pi (EH-1008)

++Electro Harmonix “ram’s head” Big Muff  (Version 2)
    (1973-77) EH-3003, the "Face Model"
++ Foxey Lady V5

++Small Stone Phaser - created by David Cockerell of EMS.(1974/75)
++CryingTone Pedal (Wah pedal) '74 chassis.
++ Knockout Attack EQ, model # EH-3004 

++Little Big Muff Pi  (EH1009) (1975/76)
++ Bad Stone phase shifter. Produced in both two-knob and three-knob configuration.
     The three-knob version is more highly sought. Years of Production: 1975 - 1981

++Electro Harmonix Big Muff (transistor and op-amp) 
++Electric Mistress (a stereo flanger)
++Deluxe Electric Mistress
++ Memory Man
++Deluxe Memory Man
++Rhythm-12 Drum Machine 
++Attack Equalizer ( 3-band rotary EQ)
++Little Muff Pi Op-amp version of 1971 Little Muff Pi.
++Little Big Muff Pi (EH-1009, EHSP1). One knob version of the Big Muff V3 

++ Big Muff Version 3. EH-3003, the "Face Model" in new red/black graphics w/ ON/OFF switch. All units from here on use Version 3 graphics. (1977 to 1978).
++Big Muff Version 4.(1977 to 1978).
    EH-3003/EH-1322, the first op-amp version w/ ON/OFF power switch.
++Crying Tone Pedal ('77 Chassis)
++Mike Matthews Dirt Road Special, EH-7050/1313 (AMP) 
++ EH-8000 Guitar Synthesizer ‘77-78 
++ Hogs Foot Bass Booster 

++ Big Muff Version 5. (1978 to 1980)
     EH-1322/EH-3003, op-amp version w/ TONE BYPASS switch instead of "OFF ON".
++ Deluxe Big Muff Pi (EH-1330 & EH-3053/3054)
++Slapback Echo (Used ReticonSAD1040)
++Stereo Slapback Echo.
++DRM-16 (DRM = Digital Rhythm Matrix), EH-7450
++Domino Theory  
++Little Big Muff Pi (EH-1322 V4/5 circuit).Op Amp version.

++Full Double Tracking Effect (used Panasonic MN3005) 
++Crying Tone Pedal ('79 chassis)
++DRM-15  (EH-7451) (DRUM)
++3-Phase Liner  
++ Space Drum - ‘79 
++ Little Big Muff . EH3034 transistor version  
++ Muff Fuzz. Op-amp version 

++ Big Muff Version 6 (1980 to 1983)
     EH-3003/EH-3034. Changed back to transistor circuit w/ TONE BYPASS switch.
++ Deluxe Big Muff Pi (EH-3053 and 3054A, B, and C)
++RTG - Random Tone Generator
++DRM-32 (EH-7460). (Drum)
++ Crash Pad (drum)
++ Sequencer Drum
++ Clockworks
++ 2 second Digital delay

Super Space Drum II -'81 (not sure this was ever produced) 

16 second Delay 
64 second Digital Looping Recorder
EHX declared bankrupt

Matthews launches New Sensor Corp., a new USSR-based company

++Sovtek starts production of EHX pedals in Russia 
++Mike Matthews' Red Army Overdrive.
++Sovtek Big Muff Pi (V1) (Green-gold paint)
++Sovtek “Civil War” Big Muff Pi V7 (Blue Gray Paint). A rebranded Red Army
    Overdrive. Commonly referred to as the 'Civil War' Big Muff for the 
    blue and gray US Civil War colours used.
++Sovtek “Green Russian” Big Muff Pi  V7.
    Tall font version. Identical to the Civil War circuit.
++Sovtek prototype Electric Mistress (only 5 made). 

++ Sovtek Green Russian Big Muff Pi V7.
     Bubble font version. Slightly different circuit to the tall font version.

++Sovtek “Black Russian” Big Muff Pi  V7.
    Identical circuit to the green Russian. 

 ++ Sovtek Black Russian. Big Muff Pi V7 
      Small box version. Slightly different circuit than the previous edition.  

++Electro Harmonix Pi NYC reissue V9. (2000 to present)
     EC3003 (2000), EC3003A (2000), EC3003B (2007), EC3003C (2008), 
     EC3003D (?),    EC3003E (2013)
++Mogwai Big Muff Pi V9. "ROCK ACTION"
    A special branded stock USA reissue BMP made in a limited run for the band Mogwai.
++Double Muff. Two 1969 Muff Fuzz circuits in one box. Discontinued in 2008.
POG (Polyphonic Octave Generator)

++Little Big Muff Pi V10 "XO". Three knob nano sized Big Muff. 
     2006 to present.  PCB Numbers: EC-D1, EC-D2, EC-D2 Revs A - E, EC-D3

++ Big Muff Pi USA reissue V9. Circuit revision B.
++Stereo Memory Man with Hazarai’s

++Big Muff Pi USA reissue V9 .Circuit revision C.
++Bass Big Muff V11. This replaced the Russian made Big Muffs.
    The BBM was based on the green Russian Big Muffs and the original 1970s Big Muffs.
    Circuit board is populated with SMD components.
    Transistors are BC547C which were used in the last black Russian Big Muffs. 
++Nano Muff Overdrive. Reissue of the 1969 Muff Fuzz/Little Muff Pi.  
++Tone Wicker Big Muff Pi V12
     2009 to present.
++POG 2

++Germanium 4 Big Muff Pi V13. This is a fuzz pedal and overdrive combo.
++Nano Double Muff.

++Deluxe Bass Big Muff. Version 11A

++ Nano Bass Big Muff Pi, Version 11B.
++ Nano Big Muff Pi. Version 10A .

++ Deluxe Big Muff Pi. Version 10B. 

Dating EHX Pedals etc
The vintage EH pedals, all have codes stamped on the underside of the potentiometer.
 EHX often used CTS (Chicago Telephone Supply) brand cans, or “pots”.

The first three numbers are a code identifying the manufacturer : CTS.
The next two numbers are the year
The last two numbers are the week of the year they were made.

So a pot stamped 1377615 was made in the 15th week of 1976. Note that this does not mean a pedal with a 1976 pot was actually made in 1976, it just means it was not made any earlier than 1976.
The pedal could have been made months or years or more after the pots were made.
Russian pedals & pots on USA made pedals from around 1999 do not have date codes.
Reverb - a brief history of EHX pedals
Pro Guitar shop
EH Man's Extravaganza

Sunday, 15 October 2017

EHX - Deluxe Electric Mistress - Version 1 - EH 1318A

A very early Electrix Mistress, deluxe.
I think this dates from 1978.

This uses the SAD 1024 Bucket Brigade chip.
The marking in pencil is a reference to a later version ? Version 2 or 3 used the EH 5150 PCB.

The EHX Delux mistress is a early flanger.

Flangers have been around for ages .. since the 1940/50s.
Les Paul in 1945 ??
They originally used two tape recorders ... one running slightly out of sync / slower than the other.
From what I've read, the first flanger using an bucket brigade delay ICs was the Eventide instant flanger FL201 in 1976 This beauty had CV controls that allowed modulation of the effects using modular synths.
The  Eventide used two Panasonic MN3001s clocked at 2.7 MHz.

Eventide today make a software version of this classic rack effects unit.

The PCB is labelled EH1318 A which makes it a Version 1 from 1978.
Notice the curled knob with pointer.
The IC's are: 1x LM78L, 1x 4558, 1x SAD1024A, 1x LM324, 1x LM311N, 1x 4013BE
with one transistor ... a 2N5087.

 + Metzgerralf - V1 pics
 + How the Flanger works - detailed
 + Reverb - Eventide FL201

Thursday, 12 October 2017

Electro harmonix Deluxe Electric Mistress - Version 2 - EH5150

I'm on the hunt for pedals and effects that use the reticon SAD 1024 bucket brigade chip.
My previous post was for the EHX slap-back pedal which also used this chip
Many of the early EHX pedals appear to have used the SAD 1024.
One such is the Deluxe Electric Mistress.

Versions 1 (1978), v2 (1979) & v3 (1981) used the reticon SAD 1024 delay
Version 4 & version 5 used the  reticon RD5106A bucket brigade device. It had its own clock driver.
Its interesting that the reticon SAD1024 is a dual 512 stage delay &
the RD 5106A is a 256 sample device.

Notice the "icehocky puck" style knobs.

The Deluxe Electric Mistress is a iconic flanger. It has been reissued in the more compact "XO" chassis. In addition to the analog filters, the Deluxe Electric Mistress features a Filter Matrix for adjusting the sweep of the flange.

The Electric Mistress was designed by David Cockerell. David had worked for EMS, where he designed the the Synthi Hi-Fli. He also designed the Small Stone phaser and Micro Synth.
These were based on the Hi-Fli.
The Deluxe Electric Mistress was designed by Electro Harmonix engineer Howard Davis (who also designed the Deluxe Memory Man).

These pics are of a Deluxe Electric Mistress of I think 1979.
The PCB is labeled EH5150 B or C???
I'm inclined to think this is a V2 EH5150C.
The V3 has a green case.
 Not exactly clear.

The power supply is 120V. There is an internal transformer held in place with two screws.
The case measurements are: 170mm x 200mm x 38mm.

ICs used:
1x LM78L. This is a linear voltage regulator.
1x 4558. Its a dual general purpose Op Amp
1x SAD1024A: BBD chip
1x LM324: Quad Op Amp
1x LM311N : Voltage comparator
1x 4013BE : CMOS Dual flip flop

Transistor: 1x 2N5087

Anyway, the Electric Mistress was used by David Gilmore of Pink Floyd.
He got his Electric Mistress V2 in 1976 or January 1977. It was used on the Animals Tour and I think the Pulse Tour in 1994. ?? You can hear it on many recordings like "The Wall"

Andy Summers of "The Police" is another notable user. Listen to "Do Do Do Da Da Da" or "Driven To Tears"

1. DIY deluxe Electric Mistress
2. The Mistress Mistery Page

Tuesday, 10 October 2017

Electro-Harmonix Slap-Back Echo

I found this old ehx pedal. It's a slap-back style echo. Model EH-4700.

Slap echo or slapback is a single echo resulting from sound bouncing off reflective surfaces.
Like when you clap your hands and listen for the echo in a large empty hall).
I understand that the Slap-Back pedal was one of EH's first forays into the smaller delay unit market.
She is pure analog and needs 18v to work, using either two 9V batteries or a 18V PSU.
I was initially drawn to it as the pedal uses the hard to find Reticon SAD1040 delay chip which is a bucket brigade IC. The Reticon can be found in the Serge WAD which is my favourite effects unit.
The Slapback delay is limited to 80ms. Just right for thickening guitar, bass guitar and other instrument tones.

A distinct repeat-echo is added to the original sound resulting in a very live sound similar to what you would hear in an auditorium.
The PCB is held in place by the Bend pot. So I was unable to remove the board to get a better look.
Thus these pics from the sides.

The pedal is uber simple.
Just two controls : a large 'blend' knob and a switch to turn a filter on or off.
The BLEND control is good for mixing wet and dry signals. The FILTER is turned on with a switch.
I think its a low pass as it seems to be good for cutting out hi frequencies.

There are standard 1/4" TRS connections

It's not versitle to replace your Memory Man or other delay but is the perfect little pedal to use in tandem with something like that to give you some varying delay tones.

I only have the first version but there seems to have been two other versions.
The Stereo Slap-back Echo edition, and the Slap-back Echo with Full Double Tracking Effects.

The Stereo Slap-back Echo edition, featured a DIRECT OUT output jack and a power indicator LED. There one of only 2 small EH pedals that ever used LEDs. The other unit was the small clone
Both units used the Reticon SAD1024 delay IC.

The Slap-back Echo with the Full Double Tracking Effect had a delay that was switchable between 50 and 100ms. The BLEND control was retained and the FILTER switch was replaced by the MS DELAY switch. It was produced around 1979 and used the Panasonic MN3005 delay IC.
EH seems to have replaced the Reticon chip with the Panasonic in nearly all of their effects. According to the net, the Panasonic chip was capable of doing the same delay effects, but with better bandwidth and less noise.I kinda like the reticon though.

The PCB is labeled EH1315

Saturday, 7 October 2017

Boss CE-1 - Chorus Ensemble & the Panasonic BBD

I'm addicted to bucket brigade chips. Ever since I first heard a Serge WAD I can't get enough of their beautiful sounds. The WAD used the Reticon SAD1040.
BBD (Bucket Bridge Delay) ICs are great for effects like reverb, vibrato, chorus, phasor, flanger & echos.
My favourite Chorus pedal is the Boss CE-1

It doesn't use SADs but still sounds great.

Created in 1976 when Roland founded Boss, the CE-1 is viewed as one of the progenitors of the chorus/vibrato effect & is timeless.

It uses Panasonic MN3002 BBD chips. They are single 512 stage IC's.
They also featured in the 1975 Roland Jazz Chorus.
Yes , It's a guitar amp.

Another chorus pedal that I think is worth checking out is the Electroharmonix small clone.

From 1979 to early 1981 it seems that, EH used either the MN3007 delay chip or the RETICON SAD1024.
The sonic differences are subtle. The SAD1024 version has been described as more “watery” sounding, adding a slight “boost” to the signal, while the MN3007 allows higher levels and less noise without signal clipping. The most sought after unit is the 1024 one, mostly because this was the version used by Nirvana’s Kurt Cobain on “Nevermind” and the “MTV Unplugged” sessions.
The vintage units have a clear and smaller (3mm) LED versus the red and larger (5mm) LED in the reissues. Also, the originals don’t have a dash mark (-) separating the words FULL and CHORUS.
The reissues have FULL-CHORUS (with the dash) written on it.

 The MN3007 is a 1024 stage long delay low noise BBD that provides a signal delay of up to
51.2 msecs. They seem pretty easy to get on ebay.

 It's found in many popular pedals like the DM-1 and CE-2 & CE-5 by Boss, the MoogerFooger 108M Clusterflux, theMemory Man by Electro-Harmonix, AD-999 by Maxon or Analog Delay by MXR.
Moog Delays (MF104)used MN3008 chips ??? I think.
The 3008 chips are very hard to get these days. Thus those MoogerFooger delays are not made any more & go for ridiculous prices on Ebay. They are a single 2046 stage chip.

Pansonic BBD IC characteristics:
MN3001 Dual 512 stage  (0.64-51.2msec for 512x2stage)
MN3002 Single 512 stage (0.32-25.6msec)
MN3003 Dual 64 stage     (0.32-6.4msec for 64x2 stage)
MN3004 Single 512 stage  (2.56msec-25.6msec)
MN3005 Single 4096 stage (20.48-204.8msec)
MN3006 Single 128 stage  (0.32-6.4ms)
MN3007 Single 1024         (5.12-51.2msec)
MN3008 Single 2046 stage (10.24-102msec)
MN3009 Single 256 stage   (0.64-12.8msec)
MN3010 Dual 512 stage low noise (5.12-51.2msec for 512x2 stage)
MN3011 3328 stage with 6 different output stages
MN3012 BBD with 3 parallel signal delay lines with a clock generator
MN 3101 CMOS clock generator for BBDs

There are some clones starting to appear:
Coolaudio: MN3207/3208/3205
Visual sound: MN3102/MN3207
Belling MN3208 and MN3207 (with the designation BL3208 and BL3207)
Xvive Audio : MN3005

The two Panasonic series of BBD chips go by the ID:
MN32xx (Low voltage : 5V) 

Devices using Panasonic BBDs
Eventide Instant Flanger FL201.
Tycobrahe Analog Delay Line (used four 3001s)

Roland Jazz Chorus; Boss CE-1

Reissued A/DA flanger (MN3004, MN3210 or the MN3204)
Ibanez AD-230 Analog Delay (used 18 MN3004s)
Doepfer Eurorack A-188-1A with 512 stages BBD (MN3004/MN3204)

blacet Time Machine.
Memory Man EH 7810 
Deluxe Memory Man EH 7850  
Deluxe Memory Man Tap Tempo 1100 (4 X MN3005's)
Boss DM-2 (later versions use the MN3205)
Boss CH-1 Super chorus (Up till 2001) 
Roland DC-10 Analog Echo
Roland DC-20 (BOSS DM-100)
Behringer VD400 Vintage Delay (CoolAudio V3205 chip)
Way Huge Aqua Puss MkII (CoolAudio V3205 chip)
Frontline Delay (Panasonic MN3205 chip)
Dod FX96 Echo FX (Panasonic MN3005 chip)
Ibanez Analog Delay 100 
Ibanez AD 80 - Analog Delay (c1980)
Doepfer Eurorack A-188-1D with 4096 stages BBD (MN3005/MN3205
Korg EM-570 Echo Mixer
Korg SD-400 Signal Delay
Pearl F-605 Electro Echo Analog Delay 
Pearl AD-33 Analog Delay
Guyatone AE-5 Analog Echo (c1974)
Guyatone PS-002 Stereo Analog Chorus (MN3101 clock and MN3006 BBD)
Doepfer Eurorack A-188-1X with 128 stages BBD (MN3006/MN3206)

Boss: DM-1; CE-2; CE-5; BF-2(MN3207)
MoogerFooger 108M Clusterflux,
EHX: Memory Man
EHX Smallclone.
Maxon: AD-999
Maxon BC-01 Stereo Analog Bi-Mode Chorus (MN3207) (late 1980s)
MXR: Analog Delay
IbanezAD202 .... Analog Delay
Ibanez FL-301DX (MN3207) ...flanger
Ibanez FL-9 (MN 3207) .... flanger
Ibanez FL 301 (MN3007 BBD and MN3101 clock) 
Doepfer Eurorack A-188-1B with 1024 stages BBD (MN3007/MN3207/BL3207) 
Yamaha FL-01 Analog Flanger (MN3007)
DOD Stereo Chorus FX65

Deluxe Memory Man Echo Chorus Vibrato XO (reissue in mid'00s).
                                                               (The XO version uses four MN3008s.)
Deluxe Memory Man TapTempo 550 - 4 X MN3008's
MXR Carbon Copy (2x 3208 chips AFAIK)
Moog Delays (MF104)
Doepfer Eurorack A-188-1C with 2048 stages BBD (MN3008/MN3208/BL3208)
Maxon AD-9000 Analog Delay (uses four Panasonic MN3008 high-voltage BBD's. The AD900 runs off a special 12-volt adaptor. Some earlier models used the MN3005)

Roland Juno 106
Roland Juno 06 - uses 2 in the chorus section
Doepfer Eurorack A-188-1Y with 256 stages BBD (MN3009/MN3209)

A/DA Flanger (Original 1979)

A/DA STD-1 Stereo Tapped Delay 

Doepfer A-188 manual
Panasonic BBD datasheet
Serge WAD (Wilson Analog Delay)

Sunday, 24 September 2017

Sat Arvo Jam

Hanging out with my friend Paul. Aka Cobramatic.
Lots of cool toys. Especially loved the Serge.

A post shared by jono (@dj_jondent) on
Some nice patches here:

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This second one is very Krell like.
That TKB sequencer/keyboard is wonderful.

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I also loved the Ciat Lombard Tetrax
It's now on my shopping list.

Ibiza - Town - Spain

Some old pics of Ibiza. Great memories. Its not just nightclubs.
These are pics of the old town.

There is loads of history here. Ibiza town was founded in 654BC by Carthage. Its one of the oldest towns in Europe. The first settlements date to over 3000 years ago.

Carthage was a great trading nation and Ibiza in those early days had a large harbor and strong city walls. Nothing has changed.
The Romans called Ibiza, Ebusus. Evidence of the Roman occupation can still be seen by the gates at the entrance to Dalt Vila (the Old Town), where there are two copies of Roman statues.
The Arabs came in the 9th century A.D. and stayed for almost 500 years. They called the island Yebisah.  On the hill in Ibiza Town, they built a large mosque (on the ruins of a temple dedicated to the God Mercury) and fortified the city walls. The remains of these walls and some of the watchtowers can still be seen today.
Ibiza was conquered by the Catalans on the 8th August, 1235.
The Catalans tore down the Arab mosque, and built the present day Cathedral on its foundations.
In the 16th century, the Italian architect Calvi completed the construction of the walls of Ibiza Town - the same walls we see today.
travel postcards: