EH Echoflanger  [schematic]

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...

Re: EH Echoflanger

Postby Govmnt_Lacky » 10 Oct 2012, 12:25

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


Is the harvest season over? Just checking on progress.

.... Or, is this a dead subject? :blackeye
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Re: EH Echoflanger

Postby GodSaveMetal » 14 Oct 2012, 02:47

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


Is the harvest season over? Just checking on progress.

.... Or, is this a dead subject? :blackeye

Ohhh nooooo!!!!! dead subject!! :cry: please noooo!! anybody make a PCB for this please? :shock: :shock: please!!!!!!!!
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Re: EH Echoflanger

Postby agoldoor » 14 Oct 2012, 02:59

Harvest season... are you in Northern California or... Iowa?
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Re: EH Echoflanger

Postby GodSaveMetal » 23 Oct 2012, 19:17

Death subjet for season??
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Re: EH Echoflanger

Postby Govmnt_Lacky » 09 Nov 2012, 17:23

Stick a fork in it! :cry:
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Re: EH Echoflanger

Postby GodSaveMetal » 09 Nov 2012, 19:00

Govmnt_Lacky wrote:Stick a fork in it! :cry:

OHHHHH milions of pins on it like an ERIZO!!!!!!!!!!!!!!!!!!!!!!!!!!! PLEASE somebody do it?? thanks for your time!!!!
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Re: EH Echoflanger

Postby sodapep2 » 20 Nov 2012, 17:53

Oh right, I was making a PCB for this wasn't I? Now that things have died down, I will begin again!

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GodSaveMetal (20 Nov 2012, 19:27)
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Re: EH Echoflanger

Postby sodapep2 » 20 Nov 2012, 17:55

agoldoor wrote:Harvest season... are you in Northern California or... Iowa?


I am in Northern California - a grad student at Davis working with tomatoes.
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Re: EH Echoflanger

Postby GodSaveMetal » 20 Nov 2012, 19:28

sodapep2 wrote:Oh right, I was making a PCB for this wasn't I? Now that things have died down, I will begin again!


OHHH!!! goodness I was thinking you don´t make it anymore!!!!!
Please the FORCE IS WITH YOU!!!!!!!! please man plesase!!!!!!!!!!!!
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Re: EH Echoflanger

Postby DJGlukBH » 17 Dec 2012, 08:14

So I've got a unit for calibration. Replaced all elcoes, converted the unit to 220v.
Here're some pics of guts:
http://i243.photobucket.com/albums/ff79 ... 0f27d7.jpg
http://i243.photobucket.com/albums/ff79 ... 983edc.jpg

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Re: EH Echoflanger

Postby Govmnt_Lacky » 17 Dec 2012, 19:35

DJGlukBH wrote:So I've got a unit for calibration. Replaced all elcoes, converted the unit to 220v.
Here're some pics of guts:
http://i243.photobucket.com/albums/ff79 ... 0f27d7.jpg
http://i243.photobucket.com/albums/ff79 ... 983edc.jpg


Cool! Good Luck with the mods :thumbsup
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Re: EH Echoflanger

Postby sodapep2 » 02 Apr 2013, 06:29

Well after some trials and tribulations including a devastating loss of the previous PCB artwork, I have come up with a preliminary layout. My apologies for taking so long...

Anyway, it's a large circuit. So large I split it up between two boards. The neat part is is that the connections between the two boards line up so that the oscillator/power pcb lines up on top (or below, however you want to put it) of the larger, audio PCB. So you can just connect the two with headers. The Osc/Power board doesn't have the space used up as nicely because it needed space to line up with the corresponding connections on the other PCB. Like a poor-mans 4-layer PCB haha.

I tried to make the off board connection sites as close to the outside as possible, but I also was realistic about space requirements. Should (!!!!) be able to fit into a 1690 (the taller version of the 1590). Depends on capacitor height and whatnot. I haven't posted a schematic/values yet for evaluation because I simply haven't had the time. Work work work!

Image
Audio (3.325" x 2")

Image
Oscillator and Power (3" x 1.5")

Yikes.
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Re: EH Echoflanger

Postby sodapep2 » 02 Apr 2013, 06:41

I think I might do the Osc/Power section again but with a smaller PCB space and have wires connecting the two. Cheaper and might just fit in a 1590
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Re: EH Echoflanger

Postby destro » 02 Apr 2013, 13:44

Awesome! Hopefully someone will make some boards up when all is finished!
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Re: EH Echoflanger

Postby sodapep2 » 02 Apr 2013, 20:21

I usually get more boards through DorkBot, so they come in triplicate. If the primarily boards end up alright, I'll let the other two go to some of you guys! If it takes off, I can do a little run of them as well. That's a bit in the future though.

In the mean time, does anyone have any mod ideas? Through-zero flange was mentioned. There's a cool chip out there now to control 4047's with memory recall and whatnot from Molten Voltage that could be cool. Throw any ideas at me!
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Re: EH Echoflanger

Postby Govmnt_Lacky » 02 Apr 2013, 20:34

@sodapep

As there are no component markings on your boards and there is no schematic to reference....

Is this layout still using the 4053 switching chips and the SAD1024 BBDs? If so, I thought you were working on the MN3007 conversion :scratch:

Please... correct me if I am wrong :slap:
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Re: EH Echoflanger

Postby sodapep2 » 03 Apr 2013, 02:19

I haven't moved the values from Nelson's schematic to mine yet, so I haven't posted, but it is the MN3007 converted layout with the altered switching. Also just noticed IC3's unused opamp is floating around. I suppose the output and - should be connected and the + to 7.5, unless someone else says otherwise. Damn you space taking things.
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Re: EH Echoflanger

Postby Scruffie » 03 Apr 2013, 02:26

sodapep2 wrote:I haven't moved the values from Nelson's schematic to mine yet, so I haven't posted, but it is the MN3007 converted layout with the altered switching. Also just noticed IC3's unused opamp is floating around. I suppose the output and - should be connected and the + to 7.5, unless someone else says otherwise. Damn you space taking things.


How have you ended up with half an unused opamp?
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Re: EH Echoflanger

Postby Scruffie » 03 Apr 2013, 02:35

Oops, can't edit, see where you were going now, I was looking at the old version.

Yes you have that right.
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Re: EH Echoflanger

Postby sodapep2 » 06 Apr 2013, 00:47

(apologies for the big pics, but you get the idea.)

Anyone for an all in one? :lol:

3.325" x 3.050". Might possibly fit into the 1590, but will definitely fit into a 1690, it's taller brother. I'll be posting a schematic with values for review in a bit, as these PCB's aren't cheap to make mistakes on. Could someone explain the switching scheme? I'm guessing the 3PDT switches between flange and chorus when the LFO is connected and slapback and filter matrix when the LFO is replaced with a steady voltage. I've been thinking it might be interesting to try out different LFO/shapes and see what happens once the dust settles on getting it work to begin with. The calibration will probably be harder than the routing :lol:

Image

Wiring:
Image

Fab'd image (purple :shock: )
Image
Need to work on the silkscreen a little, but thar she blows. Would be sick with the DMM I'm working on.
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