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
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
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.
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
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
Can't wait to see it
Here's the schematic.
Should make it clearer how I modified the circuit.
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?
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
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
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.
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
Can't wait to see it
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!!!!!
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
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.
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.
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.
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!
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.