EHX - Attack Decay 5300 [schematic]
- Professor SourTone
- Solder Soldier
I bought this not working. It passes signal and the blend works, but no effect. I contacted Howard Davis and he says whatever it is he can fix it.
- nelson
- Breadboard Brother
I have been wanting to design a workalike of this for ages with an MN3207 and an LM31700. I had a couple of schematics too, seem to have lost them.
Anyone have copies?
Anyone have copies?
- Attachments
-
- EHXAttackDecay.pdf
- EH Attack Decay schematic
- (49.89 KiB) Downloaded 589 times
- analogguru
- Old Solderhand
Information
Thanks for the guts !
I would start looking if the 4047 is delivering a clock to the MN3007. C-mos (like 4013) driving a BBD often fail. Then control the MN3007 itself.
You can do this by bypassing the 3080.
analogguru
It is really not so complicated to fix it, no special or unobtainable components inside. The only problem will be the shipping and the cost therefore, I think.I bought this not working. It passes signal and the blend works, but no effect. I contacted Howard Davis and he says whatever it is he can fix it.
I would start looking if the 4047 is delivering a clock to the MN3007. C-mos (like 4013) driving a BBD often fail. Then control the MN3007 itself.
You can do this by bypassing the 3080.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Professor SourTone
- Solder Soldier
I'm not technically up to doing that, but perhaps if I replaced one or all of those chips (being mindful of static etc) something good might happen?
- theehman
- Diode Debunker
Information
I've fixed a couple of those but I don't remember exactly what was wrong with them. On any BBD-based device I always check voltages first and then the input/output of the BBD.
What you should do is get it fixed then sell it and buy the Pigtronix Attack Sustain, also designed by Howard Davis. It does everything the Attack Decay does and does it polyphonically and better.
What you should do is get it fixed then sell it and buy the Pigtronix Attack Sustain, also designed by Howard Davis. It does everything the Attack Decay does and does it polyphonically and better.
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
- analogguru
- Old Solderhand
Information
yes.....Professor SourTone wrote:I'm not technically up to doing that, but perhaps if I replaced one or all of those chips (being mindful of static etc) something good might happen?
I would start with the 4047, then 4013 and 4066 after that the MN3007 then the two 3080... all are socketed.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Professor SourTone
- Solder Soldier
Where would be my best source for those chips? I'm in London, but I guess they'd cost nothing to send from anywhere.
- analogguru
- Old Solderhand
Information
Hmmm...... when I remember..... back in 1979 number one adress would be the complete Edgeware-road and number two the Tottenham-court-road....Professor SourTone wrote:Where would be my best source for those chips? I'm in London, but I guess they'd cost nothing to send from anywhere.
One electronic shop beside the other..... you could get everything there... I don´t know how it is today....
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Professor SourTone
- Solder Soldier
ah, so easy chips to find then!
- Professor SourTone
- Solder Soldier
Right, I've found this site, which appears to have all of them. Edgware Road and TC Road have changed since the 70's!
http://www.vintageplanet.nl/content.html#but-order
There appear to be several choices of each. Are they interchangeable or should I avoid any of them? Thanks - PT
4047, 4013, 4066, MN3007, 3080... in groups, in order...
HCF4047BE Monostable/Astable Multivibrator . . . . . . . . . . 1.05 1.25
MC14013B Dual D-Type Flip-Flop - DIP14 . . . . . . . . . . . . 1.55 1.85
4013 CD4013BE - Dual D-Type Flip-Flop . . . . . . . NOS 1.00 1.19
KG- 4013 - Dual D-Type Flip-Flop . . . . . . . . . NOS 1.00 1.19
MC14066B Quad Bilateral Switch . . . . . . . . . . . . . . . . 1.05 1.25
MC14066BCL Quad Bilateral Switch - CerDIP . . . . . . . . . . . 0.84 1.00
MC14066BCP Quad Bilateral Switch . . . . . . . . . . . . . . . . 0.67 0.80
TC4066BP Quad Bilateral Switch - DIP14 . . . . . . . . . . . . 0.92 1.10
TC4066BP Quad Bilateral Switch . . . . . . . . . . . . NOS 0.92 1.09
AK-EI-310036 TC4066BP Quad Bilateral Switch . . . . . . . . NOS 0.92 1.10
CD4066BE Quad Bilateral Switch . . . . . . . . . . . . NOS 0.67 0.80
TDA2107 (MN3007) 1024-Stage Low-Noise BBD - DIP8 . . . . (1) 10.00 11.90
RL- MN3007 - 1024-Stage Low Noise BBD . . . . . . NOS 10.00 11.90
MN3007 1024-Stage Low Noise BBD . . . . . . . . . . . NOS 10.00 11.90
CA3080 Single OTA . . . . . . . . . . . . . . . . . . NOS 1.26 1.50
CA3080E Single OTA . . . . . . . . . . . . . . . . . . NOS 1.26 1.50
http://www.vintageplanet.nl/content.html#but-order
There appear to be several choices of each. Are they interchangeable or should I avoid any of them? Thanks - PT
4047, 4013, 4066, MN3007, 3080... in groups, in order...
HCF4047BE Monostable/Astable Multivibrator . . . . . . . . . . 1.05 1.25
MC14013B Dual D-Type Flip-Flop - DIP14 . . . . . . . . . . . . 1.55 1.85
4013 CD4013BE - Dual D-Type Flip-Flop . . . . . . . NOS 1.00 1.19
KG- 4013 - Dual D-Type Flip-Flop . . . . . . . . . NOS 1.00 1.19
MC14066B Quad Bilateral Switch . . . . . . . . . . . . . . . . 1.05 1.25
MC14066BCL Quad Bilateral Switch - CerDIP . . . . . . . . . . . 0.84 1.00
MC14066BCP Quad Bilateral Switch . . . . . . . . . . . . . . . . 0.67 0.80
TC4066BP Quad Bilateral Switch - DIP14 . . . . . . . . . . . . 0.92 1.10
TC4066BP Quad Bilateral Switch . . . . . . . . . . . . NOS 0.92 1.09
AK-EI-310036 TC4066BP Quad Bilateral Switch . . . . . . . . NOS 0.92 1.10
CD4066BE Quad Bilateral Switch . . . . . . . . . . . . NOS 0.67 0.80
TDA2107 (MN3007) 1024-Stage Low-Noise BBD - DIP8 . . . . (1) 10.00 11.90
RL- MN3007 - 1024-Stage Low Noise BBD . . . . . . NOS 10.00 11.90
MN3007 1024-Stage Low Noise BBD . . . . . . . . . . . NOS 10.00 11.90
CA3080 Single OTA . . . . . . . . . . . . . . . . . . NOS 1.26 1.50
CA3080E Single OTA . . . . . . . . . . . . . . . . . . NOS 1.26 1.50
- analogguru
- Old Solderhand
Information
All of them can be used. For the CA3080 i would choose the CA3080E even when I don´t believe that they will stock the metal-can version (E is the plastic DIP-version).
Funny that they list the TDA2107. That is a (for Philips) restamped version of the MN3007 which never really appeared on the market. I doubt that they have some in stock, instead they will send the MN3007.
analogguru
Funny that they list the TDA2107. That is a (for Philips) restamped version of the MN3007 which never really appeared on the market. I doubt that they have some in stock, instead they will send the MN3007.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Professor SourTone
- Solder Soldier
Thanks very much for your help. I've ordered a few extra of each, just in case!
2x HCF4047BE Monostable/Astable Multivibrator . . . . . . . . . . 1.05 1.25
1x MC14013B Dual D-Type Flip-Flop - DIP14 . . . . . . . . . . . . 1.55 1.85
1x 4013 CD4013BE - Dual D-Type Flip-Flop . . . . . . . NOS 1.00 1.19
2x CD4066BE Quad Bilateral Switch . . . . . . . . . . . . NOS 0.67 0.80
2x MN3007 1024-Stage Low Noise BBD . . . . . . . . . . . NOS 10.00 11.90
4x CA3080E Single OTA . . . . . . . . . . . . . . . . . . NOS 1.26 1.50
2x HCF4047BE Monostable/Astable Multivibrator . . . . . . . . . . 1.05 1.25
1x MC14013B Dual D-Type Flip-Flop - DIP14 . . . . . . . . . . . . 1.55 1.85
1x 4013 CD4013BE - Dual D-Type Flip-Flop . . . . . . . NOS 1.00 1.19
2x CD4066BE Quad Bilateral Switch . . . . . . . . . . . . NOS 0.67 0.80
2x MN3007 1024-Stage Low Noise BBD . . . . . . . . . . . NOS 10.00 11.90
4x CA3080E Single OTA . . . . . . . . . . . . . . . . . . NOS 1.26 1.50
- analogguru
- Old Solderhand
Information
If you don´t need the spare components you can start to build your first clone.....an EH Attack Decay....
analogguru
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
Interesting....though I have a schematic for it somewhere, I guess I never noticed that there was a BBD in the circuit.
This has been on my short list of pedals I need to own before I die. I was really psyched that the Pigtronix pedal was released, but unfortunately I can't spare a nickel on a new pedal at the moment.
Can someone explain how this pedal works, and what role the BBD plays in it's function? I've played one only once, and I felt it was very different from the Slow Gear, and much more interesting to me.
Thanks
Roger
This has been on my short list of pedals I need to own before I die. I was really psyched that the Pigtronix pedal was released, but unfortunately I can't spare a nickel on a new pedal at the moment.
Can someone explain how this pedal works, and what role the BBD plays in it's function? I've played one only once, and I felt it was very different from the Slow Gear, and much more interesting to me.
Thanks
Roger
- Professor SourTone
- Solder Soldier
Well unfortunately changing all the chips (twice) yielded no result. Its possible whoever had it before got the orientation of the chips wrong (I copied it exactly), or else its something else. I think I'll send it to Howard, after all he designed the thing! Thanks for the help, though.
- paperhouse
- Breadboard Brother
yeah, i thought this was a simple swell a'la the boss slow gear. i'm curious about the BBD too.Rodgre wrote:Interesting....though I have a schematic for it somewhere, I guess I never noticed that there was a BBD in the circuit.
This has been on my short list of pedals I need to own before I die. I was really psyched that the Pigtronix pedal was released, but unfortunately I can't spare a nickel on a new pedal at the moment.
Can someone explain how this pedal works, and what role the BBD plays in it's function? I've played one only once, and I felt it was very different from the Slow Gear, and much more interesting to me.
Thanks
Roger
- analogguru
- Old Solderhand
Information
Maxbe the description below can help a little bit.....i'm curious about the BBD too.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Kaos
- Breadboard Brother
sorry guys for beeing a little ot
but why do i not have the permission to see the attachments?
but why do i not have the permission to see the attachments?
The camel is a horse designed by a committee that never met.
- modman
- a d m i n
Information
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I'm sorry about this - should be fixed now.
Is this the first attachment in this section then?
thanks for reporting this
Is this the first attachment in this section then?
thanks for reporting this
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- Kaos
- Breadboard Brother
yes
now i can see the files
thx modman
@topic
is it possible to draw up a scheme?
because i am very curious how this thing works
now i can see the files
thx modman
@topic
is it possible to draw up a scheme?
because i am very curious how this thing works
The camel is a horse designed by a committee that never met.