ABDUCTOR II DELAY.

[Andrew B. Campbell]

I...I've barely slept. What an adorable mistake. Thank you.

[Andrew B. Campbell]

Excuse the double post here:

So, I've switched everything around in the proper manner. I now receive audio from my instrument, but only when the master volume of the pedal is turned completely up. After that, the delay kicks in and is affected by each volume knob, will oscillate with the LFO knob and more, however the delay audio sounds almost exactly like a loud geiger counter continuously grinding away. I thought this may be caused by the transistors, so I swapped for a fresh pair. Still no luck. The LED's also will not indicate as to whether or not the pedal is on. The sounds are created regardless of the positing the footswitch has been thrown to; on or off.

In/Out Readings for IC 5:

1: 4.473v
2: 4.473v
3: 4.101v
4: 0.001v
5: 4.470v
6: 4.473v
7: 4.472v
8: 8.93v

I really... don't want to have to scrap this with as much money as I've spent on parts.

[deadastronaut]

ok...


make sure your 3 red wires going to the foostswitch are correctly orientated....

the delay will contiinue to trail off when bypassed, if you have the feedback turned up full
it will oscillate even when bypassed.....

if your foostswitch wires are fine, swap the footswitch fet. 2n5457.  ....lets get the on,off sorted....

no leds pulsing with lfo?

make sure you have wired the toggle switch correctly...

does the delay time pot work?...

a guy had a similiar issue with fake 2399,s....when he tried others it was ok.

[gcwills]

First, a big thank you to Rob for his very clever design

I have just finished my version and thought I'd post it here.





Mine is definitely not as pretty as Rob's but will do.

Works really well and very happy with it.
I've communicated with Rob that I had an issue with the modulation. I was unable to completely turn it off with the depth pot anticlockwise.
I developed a simple fix. I removed R22 (1K) and connected the free terminal (1) on the depth pot to Vcc (pin1) on IC1.
This allows for zero modulation when the depth is turned anticlockwise. Means that the depth pot can swing from zero modulation to full.

[deadastronaut]

hi grant,

nice one man...excellent.

you dont need pretty, when it sounds cool..

[deadastronaut]

hi guys, just a little update and offer for DIYSB people only. (not available on my site)

i had some new blue boards made, which are great, however i messed up the silk screen.

so there is no numbering on them, but there are component outlines..

so rather than use them as beer mats, or collecting dust etc..

i thought i would offer them up at reduced mates rates..

if you download the PDF on my site, it will still be an easy build.
as there are numbered 'guide' pics of the board/ with BOM/list/schematic of parts etc..

http://deadastronaut.wix.com/index#!__delay


5 quid for uk delivery...

6 quid (GBP) for worldwide delivery.....

so if you fancy one pm me..cheers. rob.





for those that haven't heard it...

cheers guys, Rob.

[deadastronaut]

update :  only 4 pcbs left.

cheers guys...

[Andrew B. Campbell]

Let me know if you received my payment in time for the last of the PCB's.

As for my build above, I think I located the root cause of error in mine and I believe it has to do with a damaged 7th pad for IC 5. I've double checked values everywhere else and that seems to be the problem area, plus I'm a little leery about employ the rather brittle, polystyrene capacitors and vintage parts for this one. It's not worth my trouble until I know it works.

[deadastronaut]

hi andrew, yes all sorted...

ALL GONE:

[Stevpo]

Hey all,
I'm wondering if anyone could comment on what I've experienced with my build. The circuit board arrived and the build went well. Everything is working, but I'm experiencing some ugly noise on the repeats when the input signal gets to a certain level. It sounds like maybe the opamps in the chips are being overdriven. Has anyone else encountered this problem? Is there a recommended fix for this (ie. any optimal place to attenuate the signal)? The input and output buffers remain clean. I'm wondering if maybe this is a bandwidth issue, like maybe some more treble should be attenuated in order to keep the repeats from overdriving?

[deadastronaut]

hi, is it the same issue as this....bad pt2399's?

http://www.diystompboxes.com/smfforum/index.php?topic=106536.0;topicseen


...

as a heads up, there is a small fix for the new 'blue'' boards..as there was an error on the vol pot wiring (which is weird as eagle didn't show it ) but this will fix it ok.
http://deadastronaut.wix.com/index

[Stevpo]

It would certainly seem like the PT2399s are being overdriven. Wasn't quite sure. I suppose trimming the input and compensating with output volume is a workaround...

[Maik]

appconfig.xml file not found

[Andrew B. Campbell]

It was the PT2399's the whole time. You were right. I built another delay recently, successfully I might add, and used the IC's I had initially bought for the first Abductor II attempt for this other build. One of the PT2399 IC's caused me to not have any audio output at all and I was fairly confident with my Abductor II build once it was completed, so I'm pretty certain the next attempt will go incredibly smoothly now that I have a system for testing these chips a little more efficiently!

[thomasolsen84]

Hi. Im building an Abductor delay II. Im having some problems with the wiring I think. I can't figure out the off board wiring. I´ve build the chasm reverb and the tremshifter from dead astronaut, and got the wiring right. Can someone please tell me how the off board wiring are one this one. Is it a DPDT switch or a 3Pdt switch for this one? The reg1 Is an L7805 insead of the 78L05 and I reversed it to fit the polarity. I got the two leds going but no sound either on or bypassed. Any help would be much appreciated. Thanks

[deadastronaut]

Hi,   do you have the blue pcb?

if so check my site for the mod...

the dpdt is wired using one side of it,   and the same as the pads are orientated..

im not home at the mo,  but when i get back i,ll get back to you ok.

Rob .

[thomasolsen84]

Hi. Thanks for your answer. I got the blue pcb yes. I wired the 2pdt on one side off the 3 pads on the pcb that says footswitch. The other side is empty. Maybe i got the output, input or the 9v wrong? I have the anode on the leds connected to the square pads on the pcb and i got lights. The 9v from the pcb is going to the plus on my 9v input, In to the positive pin on the input jack, O on the pcb is output right? that is going to the positive tip on my output jack. And G is grounded to ground on input jack. I didn´t notice that the was a bug notice on your website. I´ll check it out. Thanks again. I hoping to get it going soon, as I'm dying to hear this one, seems very promising and cool as your youtube video sounded  

[deadastronaut]

Yes thats right...

but with the mod you will take the vol lug2 wire to your out tip ok...

[thomasolsen84]

I´ve tried the fix that you´ve mentioned. I just took off the wire from volume pad 2 on pcb and to the out tip, and left if open. Is that right? or should i just make another wire from lug 2 of the volume pot and wire it to tip of the output jack? It still has no sound either activated or bypassed. I´m sorry for all the questions Im quite new at this  

[deadastronaut]

hi thomas, check you pm.

i messaged you earlier