Echo Base - a new PT2399 delay

[slacker]

I think it will work and it doesn't matter which way round you put it. I think it's probably better to replace it with a non polarised cap though if you can.

[Valoosj]

Sweet, changing the 2 47Ks to 20K worked. When I hit a chord in bypass, and immediatly mute it you still hear a faint repeat. This is probably normal as the pedal isn't true bypass. Other than that, this is a really cool delay. Definetly a keeper. Thank you slacker!


as for the extra delay time, if anybody asks for it I can post the adapted layouts and stuff. The repeat gets some OD, but that doens't bother me at all.

[evilpaul]

Sweet, changing the 2 47Ks to 20K worked. When I hit a chord in bypass, and immediatly mute it you still hear a faint repeat. This is probably normal as the pedal isn't true bypass. Other than that, this is a really cool delay. Definetly a keeper. Thank you slacker!


as for the extra delay time, if anybody asks for it I can post the adapted layouts and stuff. The repeat gets some OD, but that doens't bother me at all.

I'm interested in the adapted layouts, post 'em up!

[Tuemmueh]

Sweet, changing the 2 47Ks to 20K worked. When I hit a chord in bypass, and immediatly mute it you still hear a faint repeat. This is probably normal as the pedal isn't true bypass. Other than that, this is a really cool delay. Definetly a keeper. Thank you slacker!


as for the extra delay time, if anybody asks for it I can post the adapted layouts and stuff. The repeat gets some OD, but that doens't bother me at all.

I'm interested in the adapted layouts, post 'em up!

+1

[Valoosj]

Sorry for the delay  (pun very much so intended)



Now I just have one question for you. I want to use an LDR to add more feedback since I love the oscillation. How should I wire it? Hook up one leg to lug 1 and the other to lug 3 of the feedback pot? I want it to increase in feedback as I dim the light on the LDR.

[DWBH]

Is the schematic on the first page 100% correct?

[Boogdish]

I was able to successfully build one using the schematic on the first page.  Just the feedback resistor needs to be selected for your personal taste.

[slacker]

Is the schematic on the first page 100% correct?

Yes, it's correct. The version in my layout gallery had a few pin numbering errors on the 2 opamps but I've corrected that now as well.

[Valoosj]

Use the verified layout in the pdf file. I used that pcb to add the extra time mod.

Nobody knows how to do the thing I asked in my previous post?

[ppatchmods]

Is there a wiring diagram for the jacks and switches?  I'm kinda new to reading the layouts.  Also, is their a replacement for the 7805 transistor?  Small bear doesn't carry them. Thanks

-John

[slacker]

My vero layout show the wiring for the jacks and switches, it's the same which ever layout you use.

http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/echobasefinal.jpg.html

The 78L05 that smallbear carries should be fine, I think other people have used them.

http://www.smallbearelec.com/Categories.bok?category=ICs+-+Voltage++Regulators+and+Converters

[ppatchmods]

Thanks Slacker! 

[Valoosj]

Since no one feels like answering my question I'll come up with the solution. Slacker, could you verify this?
If I add and LDR on LUG 2 and 3 (left and middle with the shaft down and the lugs facing me) would that increase the feedback when I dampen the incoming light on the LDR?
I haven't been able to test it, but I think this should do it.

Here's a pic of my finished Echo Base fields.

[Filament]

Regarding verified layouts, I can attest that the latest anonymousfacelesscoward layout is good.  Some may like it as it's a good bit smaller than his original one.  I was able to squeeze it into a 1590.  I won't post it since it's not mine but you can find it on his site.

[Gila_Crisis]

i built it and i'm really pleased, it sounds really really good!!!
btw what value do you suggest for R17? on mine i used the standard 20k resistor, but it's too low, already before 3/4 of the feedback pot it start selfoscillating!!!

[Barcode80]

what type of switch? i know you only need single throw, but is it momentary like boss that is required or is latching required?

[slacker]

For the bypass footswitch you need a SPST latching or use a half a SPDT latching as they are probably easier to get hold of.

[ppatchmods]

Is the toggle switch a on(on) w/ 3 lugs?  I thinks that's right, but just checking before i pick one up. Also, on the newer layout, do all the ic's face the same way? thanks

[slacker]

Yeah the tails/Boss toggle is a SPDT on/on latching switch.

Not sure about the layout, you mean the compact anonymousfaceless one?

[ppatchmods]

yes, the anonymousfaceless one.  It appears they all face the same way, but I think I read that someone fried an ic assuming the same thing. Thanks Slacker!