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This is great! Neat and tidy from the inside - futuristic from the outside.  Very interesting that i just saw this 5 hours after I have decided to to do something similar on my pedalcontroller prototype. Not nearly that perfect but I did print a negative frontplate on paper and placed it under the acrylic cover

Again: superior work.

Looking through my glasses I am not sure if I see this right: The board on top is held in place only by the solid wires you are using ?
This is a very tidy build. I usually do not use solid wire because the (maybe too cheap) insulation melts off when heated to long.

Hi, thats 256kBit dynamic RAM 
The last computers using it schould be at least 10 years old.
I doubt that they have ever been used in any Guitar gear.

Sorry.
Thomas

looking at the schematic mentioned Pin 3 and 4 are to be connected to each other 

Hi,
I had a look into the bicolor topic for some of my pedals and can answer this.
The schematic you have drawn will work IF the middle pin of the LED is a common cathode.
I have found bicolor LED`s that do have a common anode.

Either way you just need to try it out. If it doesnt work you need to connect +9V to the 3PDT switch and GND to the LED via the resistor.

[SOLVED]

Hi, doing all the mods suggested in the December thread made it. I do have a working delay now 
Even the noise got limited to a bearable degree.
The clock signal I heard was not the clock signal but a rather noisy power supply I was using for my test setup 
Thank you to everyone giving input.

Thanks to all who are trying to help. I will dig into it when I return from work and see what can be improved.

Interesting thing with the 9V clock. I would have guessed this would inject glitches into the BBD. Good to know it doesnt.

@madbean: The de-emphasis filtering is taking place in IC 3B OR 8A ?  I will also check the clock rate to be above 7kHz. 

I also came across the thread you mentioned but wasnt able to figure out that it superseeds the documents that are uploaded. :-)

HI,

I just finished a v3205 Version of the Dirtbag Deluxe and I dont think its working right.
Some things I can state after 4 hrs of looking at it with a Scope and reading datasheets of the NE 570 and v3205.

Facts:
47k used for R 11/12.

Observations meassured:
a) NE 570 Output on Pin 7 is Biased 7V
b) BBD Chips run at 8,2V  resp. 8V Vgg

Observations soundwise:
a) Not replacing the 1k/33n filter results in distorted repeats - (we know that)
But the repeated signal also has a high level of noise comming with it. So the delay-circuit is somewhere grabbing noise
b) replacing R21&C14 with 100K both: results in a less distorted signal. The signal is weak and still has the same level of noise. It is also not possible to make the circuit self oscillate with this mod even when the gain pots are up and feedback is full.
The noise starts with the signal coming through and ends with the signal.

Another Observation made:
Why is there a 9V clock signal fed into a 8,2V driven BBD ? Shouldnt be the clock signal max the supply voltage of the chip ? - This seems to be a design flaw as this is how the clock is built.

Can someone please supply me with some reference of a working v3205 Dirtbag.
In Detail I am looking for the correct Pin 7 NE 570 Bias. 7V in my build. Also any Scope reading of BBD in and out signals Pin 3 and 7 would be very helpful as I think the clock signal is not filtered out in the later stages.

Any other idea would be very helpful.
Thank you !

Hi,

you are looking at a standard long-shaft push/pull guitar pot.
I am not sure if the picture does fit the description in the cataloge.
It could also be a pot with on/off switch at the "zero" position but I wont go for it.
I dont see how this will help fitting things in small enclosures as it is quite large.

You may want to use 9mm Alpha pots with small knobs which would give you more space.

Hi Erin,

thanks again for your feedback. 
I have ordered a Mysterioso PCB and will go from there to see which I like better.

Hi Bored,

just following up the discussions here and came across this thread.

As the 4049 is just an inverter surely it can drive a LED. See schematic.
Feeding the audio signal from Pin 4 of the 4049 IC via a 270k resistor will make some nice light effects.
(I couldnt help and actually tried this on my Snarkdoodle using the Inverter on Pin 14/15)
I also ordered a bicolor LED to have a common On/Amplitude indicator :-)

If you have socketed your IC you just need to pull the respective pin from the socket and solder directly to the pin - this is some very ancient technique used by us computer cracks when I was young :-)

hope this helps
Thomas

Hi Erin,

thank you for sharing your knowledge and opinion with me.
Do you, by any chance, remember which of those circuits has the lowest noise level ?

best
Thomas

Hi dear community 

Somehow I got impressed by the pure and raw sound the 4049 distortion circuit produces. I already did build a Snarkdoodle.
I am not so fond of the noise this circuit produces as it definitely amplifies the tiniest input signal delivered - even unwanted 

I am now looking into some more advanced circuits and need your input if you already tried one of those and what your personal experience with those circuits is/was.

I had in mind the
Mysterioso Jr that can be found here on Madbeans and
Gaussmarkov's Hot Tubes circuit found here:http://gaussmarkov.net/wordpress/circuits/hot-tubes-clone/

Your input is higly appreciated.
Thank you

Hi, I just happened to build a chunk chunk as well and trying it out I was also missing some low end.

I just tried the mentioned mod and just wanted to tell that it works great !

I was using  the switch with the following values: (because thats what I had lying around  ) )
168n
33n
47n

I also think that you could lower it down to 22nF - but thats a matter of taste anyhow.
I was very impressed by the fact that if did not harm the overall sound of the pedal.

Now looking to put it in a nice enclosure.