ABDUCTOR II DELAY.

[Andrew B. Campbell]

Hey Rob,

So, do you think this might work for activating/deactivating modulation properly? If not, let me know your thoughts on the matter. I'm about finished with the build.

[deadastronaut]

edit:

i think your over thinking it..

you just need to cut the connection of the lfo to the time pot..

for on/off lfo..

[Andrew B. Campbell]

You're correct. I was so exhausted that evening that I didn't see the painfully obvious, simpler option. Thank you for that.

[deadastronaut]

no probs...we all get like that i'm sure..

[mathbrook]

What was the "simple fix" for the noise? the original image posted way earlier in this thread isnt available now

[deadastronaut]

Hang on math...i,ll grab it for you....

[deadastronaut]

here ya go..



the new 'red' pcbs are all fixed now. 

[mathbrook]

thanks rob! though i guess i wont need the fix since im gonna be buying a new board (once im back from vacation)
if i were to add an effects loop, where would i route it from? my guess is the wiper of the feedback pot

[Etrondelamour]

Hi everyone one!

I'm thinking to buy a pcb from Rob, I find this delay full of possibility.

I had a look at the schem, and I 'm wondering if there is a way tout add a shape knob to the LFO, I think this delay will be mad with it 

[deadastronaut]

hi, there may be a way, but the pcb is pretty tight, so cutting traces on a dual layer board

and tacking bits on might be an issue....

[Etrondelamour]

And if I use a veroboard to add the part for a shape knob?



If I add a shape knob, will it take place between pin 6 and 7 of the TL 072?


I am a noob, so I 'll try to understand how it could work. 

[deadastronaut]

you would  still have to break traces on the dual layer pcb though.....could be tricky,

if not destructive..hmmm...

[Etrondelamour]

Ok I understand better why it will be an issue.

The only way to add it will be to start from the schematic, and build it on a veroboard. I'm not enought crazy for it yet!

[deadastronaut]

yes it would be a nightmare vero for sure...

[bluebunny]

yes it would be a nightmare vero for sure...

But probably a walk in the park for Dino...   

[BetterOffShred]

Just got my board, but I'm wondering if anyone has a good source for 47k pots, and a B2M in 16mm?   Looking forward to this build!

[deadastronaut]

Hi. You can use 50k pots...16mm

I found 2m linears on ebay ..

Rob

[BetterOffShred]

HEADS UP:

a couple of people said they had a lot of hiss with this...

anyway, had a word with mr samhay on here and he suggested this fix..

and its now perfectly quiet...even with headphones on, cheers sam, your a star..

do this and you 'll have a nice quiet delay...

bear in mind your abductor vol level should be at around 10'oclock for usual bypass level.




nice easy fix. 

Hey guys I built my Abductor 2 finally and I'm getting some weird stuff.  The modulation works and the led flashes accordingly to speed and depth.   

The delay only works with the switch in the down position, and with the time pot full CCW.   If I turn it CW just a tiny bit it makes a big noise similar to dive bombing a note with the time knob on other PT delays and then the knob has no affect on the sound as I move further CW. 

The image showing the above mentioned fix doesn't seem to be on the webpage any more. Not sure if that's related.   

While in the little spot I have delay,  I've tested the volume of each chip separately and they are all delaying so I'm doubting a chip. 

I used all the specified values for pots and verified my time pot is a B2M and the sweep on it works as it should.

Any ideas ? Thanks

[deadastronaut]

Hi shred. The "fix" wouldnt have anything to do with your issue.

Are you getting volume adjustment on all 4 delays up top row
Of pots?.

And are they responding time wise?....divided?.

Make sure you havent blobbed solder onto a via...little hole.

[BetterOffShred]

Yes I have volume on all 4 delays,  and feedback works.  It's just the time pot that is behaving strangely and only in one switch setting.  I'll go over the board and make sure I didn't bridge anything.  I had to use the super fine tip on my iron.  It's a great board.  Thanks for the advice.  I'll report back