EH Echoflanger  [schematic]

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Re: EH Echoflanger

Postby Govmnt_Lacky » 06 Apr 2012, 20:17

nelson wrote:This thing is a bitch to route.


Just a friendly suggestion 8)

You really do not need all that real estate for the 2P4T rotary switch. You can pick up GND anywhere and you only need 3 connection points for the contacts.

You could probably buy yourself quite a bit more space if you don't incorporate an "on-board" rotary switch :applause:
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Re: EH Echoflanger

Postby nelson » 07 Apr 2012, 01:49

Govmnt_Lacky wrote:
nelson wrote:This thing is a bitch to route.


Just a friendly suggestion 8)

You really do not need all that real estate for the 2P4T rotary switch. You can pick up GND anywhere and you only need 3 connection points for the contacts.

You could probably buy yourself quite a bit more space if you don't incorporate an "on-board" rotary switch :applause:


After I posted this I dumped the rotary switch and 4053 in favour of an SPDT toggle for the disconnecting the LFO and switching to A steady DC and a 3PDT toggle for the other changes in the audio path and the clock cap. I ended up replacing the blend switch with a full wet/dry blend pot and added a gain recovery stage at the output. All 4 functions work as they did before. Just two toggles instead of one rotary and those two CD4053.

The Electronic switching and rotary just felt like a bigger headache than I wanted.
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Re: EH Echoflanger

Postby Govmnt_Lacky » 07 Apr 2012, 02:02

nelson wrote: After I posted this I dumped the rotary switch and 4053 in favour of an SPDT toggle for the disconnecting the LFO and switching to A steady DC and a 3PDT toggle for the other changes in the audio path and the clock cap. I ended up replacing the blend switch with a full wet/dry blend pot and added a gain recovery stage at the output. All 4 functions work as they did before. Just two toggles instead of one rotary and those two CD4053.

The Electronic switching and rotary just felt like a bigger headache than I wanted.


Sounds like you did quite a bit of choppin'!

Should make the layout quite a bit smaller. Definitely a lot faster than me :oops:

Can't wait to see it :applause:
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Re: EH Echoflanger

Postby nelson » 07 Apr 2012, 13:51

Govmnt_Lacky wrote:
nelson wrote: After I posted this I dumped the rotary switch and 4053 in favour of an SPDT toggle for the disconnecting the LFO and switching to A steady DC and a 3PDT toggle for the other changes in the audio path and the clock cap. I ended up replacing the blend switch with a full wet/dry blend pot and added a gain recovery stage at the output. All 4 functions work as they did before. Just two toggles instead of one rotary and those two CD4053.

The Electronic switching and rotary just felt like a bigger headache than I wanted.


Sounds like you did quite a bit of choppin'!

Should make the layout quite a bit smaller. Definitely a lot faster than me :oops:

Can't wait to see it :applause:


Here's the schematic.

Should make it clearer how I modified the circuit.
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Re: EH Echoflanger

Postby PmCimini » 16 Apr 2012, 12:58

it does seem okay, any builds? the new stereo poly chorus (both large chassis and die-cast aluminum) run with one MN3008 and one MN3009. Suprised to not see any gutshots of those here... The circuitry is a lot different, but does anyone know how it compares to the sound of the old one?
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Re: EH Echoflanger

Postby Govmnt_Lacky » 16 Apr 2012, 13:07

PmCimini wrote:it does seem okay, any builds? the new stereo poly chorus (both large chassis and die-cast aluminum) run with one MN3008 and one MN3009. Suprised to not see any gutshots of those here... The circuitry is a lot different, but does anyone know how it compares to the sound of the old one?


This seems odd to me. Seeing as the original Echoflanger circuit (which is reported to be the same circuit that was used in the Polychorus... just a name change) used (2) SAD1024 chips. One chip in series (1024 stages) and one chip in parallel (512 stages)
Now, seeing as the newer versions use MN3008 (2048 stages) and MN3009 (256 stages) I can only assume that they achieve the same results by altering the clock signal :hmmm:

Very odd.
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Re: EH Echoflanger

Postby nelson » 16 Apr 2012, 19:29

Govmnt_Lacky wrote:
PmCimini wrote:it does seem okay, any builds? the new stereo poly chorus (both large chassis and die-cast aluminum) run with one MN3008 and one MN3009. Suprised to not see any gutshots of those here... The circuitry is a lot different, but does anyone know how it compares to the sound of the old one?


This seems odd to me. Seeing as the original Echoflanger circuit (which is reported to be the same circuit that was used in the Polychorus... just a name change) used (2) SAD1024 chips. One chip in series (1024 stages) and one chip in parallel (512 stages)
Now, seeing as the newer versions use MN3008 (2048 stages) and MN3009 (256 stages) I can only assume that they achieve the same results by altering the clock signal :hmmm:

Very odd.



I have a schematic of the reissue. It's extensively modified from the original. It uses the 256 stage bbd for the flange/filter matrix and the 2048 for the chorus/slapback. The LFO is different. The set up for the tune/width controls is changed.

It will react and sound quite different to the original.
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Re: EH Echoflanger

Postby GodSaveMetal » 01 Jul 2012, 17:59

nelson wrote:
Govmnt_Lacky wrote:
nelson wrote: After I posted this I dumped the rotary switch and 4053 in favour of an SPDT toggle for the disconnecting the LFO and switching to A steady DC and a 3PDT toggle for the other changes in the audio path and the clock cap. I ended up replacing the blend switch with a full wet/dry blend pot and added a gain recovery stage at the output. All 4 functions work as they did before. Just two toggles instead of one rotary and those two CD4053.

The Electronic switching and rotary just felt like a bigger headache than I wanted.


Sounds like you did quite a bit of choppin'!

Should make the layout quite a bit smaller. Definitely a lot faster than me :oops:

Can't wait to see it :applause:


Here's the schematic.

Should make it clearer how I modified the circuit.



Great MAN!!!!! would you please can made a PCB and a layout from these?? thanks a lot!!!! million thanks!!!!! :applause: :applause:
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Re: EH Echoflanger

Postby uncleboko » 01 Jul 2012, 18:06

nelson wrote:
Govmnt_Lacky wrote:
PmCimini wrote:it does seem okay, any builds? the new stereo poly chorus (both large chassis and die-cast aluminum) run with one MN3008 and one MN3009. Suprised to not see any gutshots of those here... The circuitry is a lot different, but does anyone know how it compares to the sound of the old one?


This seems odd to me. Seeing as the original Echoflanger circuit (which is reported to be the same circuit that was used in the Polychorus... just a name change) used (2) SAD1024 chips. One chip in series (1024 stages) and one chip in parallel (512 stages)
Now, seeing as the newer versions use MN3008 (2048 stages) and MN3009 (256 stages) I can only assume that they achieve the same results by altering the clock signal :hmmm:

Very odd.



I have a schematic of the reissue. It's extensively modified from the original. It uses the 256 stage bbd for the flange/filter matrix and the 2048 for the chorus/slapback. The LFO is different. The set up for the tune/width controls is changed.

It will react and sound quite different to the original.


The circuit I saw used MN3008 & MN3009
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Re: EH Echoflanger

Postby sodapep2 » 26 Jul 2012, 00:14

Hey Nelson, nice schematic! I'm looking into making a PCB for it, however I'm a bit confused as to where 'to clock timing cap' goes on SW1G$3 next to R36 on the right middle side of the audio schematic. I can't seem to find its mate.

Thanks!
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Re: EH Echoflanger

Postby Govmnt_Lacky » 26 Jul 2012, 16:42

sodapep2 wrote:Hey Nelson, nice schematic! I'm looking into making a PCB for it, however I'm a bit confused as to where 'to clock timing cap' goes on SW1G$3 next to R36 on the right middle side of the audio schematic. I can't seem to find its mate.

Thanks!


I believe it goes to the "CH/FL Switch" on the first sheet. The change in cap values is needed to switch the delay rates.
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Re: EH Echoflanger

Postby sodapep2 » 02 Aug 2012, 02:23

Govmnt_Lacky wrote:
sodapep2 wrote:Hey Nelson, nice schematic! I'm looking into making a PCB for it, however I'm a bit confused as to where 'to clock timing cap' goes on SW1G$3 next to R36 on the right middle side of the audio schematic. I can't seem to find its mate.

Thanks!


I believe it goes to the "CH/FL Switch" on the first sheet. The change in cap values is needed to switch the delay rates.


I see. So 'to clock timing cap' = 'To CH/FLSwitch'. Thanks!
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Re: EH Echoflanger

Postby sodapep2 » 02 Aug 2012, 03:53

I also gotta say, what's up with the odd resistor values?

3.01k? :?
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Re: EH Echoflanger

Postby Govmnt_Lacky » 08 Aug 2012, 20:22

sodapep2 wrote:I also gotta say, what's up with the odd resistor values?

3.01k? :?


My guess is that EH used whatever they had on-hand at the time.

Not much difference between a 3K and a 3.01K :thumbsup
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Re: EH Echoflanger

Postby Govmnt_Lacky » 19 Aug 2012, 00:19

sodapep2 wrote:Hey Nelson, nice schematic! I'm looking into making a PCB for it, however I'm a bit confused as to where 'to clock timing cap' goes on SW1G$3 next to R36 on the right middle side of the audio schematic. I can't seem to find its mate.

Thanks!


Any progress/news on this?
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Re: EH Echoflanger

Postby sodapep2 » 19 Aug 2012, 19:46

Making progress. Right in the middle of busy season (harvest), so it's slow but it's getting there!

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Re: EH Echoflanger

Postby GodSaveMetal » 19 Aug 2012, 20:20

sodapep2 wrote:Making progress. Right in the middle of busy season (harvest), so it's slow but it's getting there!


GOODNESSS!!! the force is with you!!!!!!!!!!!!!!!! get it man!!!!!!!! :twisted: :twisted:
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Re: EH Echoflanger

Postby Govmnt_Lacky » 01 Sep 2012, 22:47

Cruzin' through here and gotta ask...

Any new progress sodapep? :applause:
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Re: EH Echoflanger

Postby GodSaveMetal » 02 Sep 2012, 00:02

Govmnt_Lacky wrote:Cruzin' through here and gotta ask...

Any new progress sodapep? :applause:


Yeahhh my friend sodapep, got´em THE FORCE IS WITH YOU!!!!!!!!!!!!!!!!! :horsey:
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Re: EH Echoflanger

Postby Govmnt_Lacky » 22 Sep 2012, 22:08

Any news on this soda?
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