Hey guys.
just finish my sea urchin build and im having some weird sounds ....
basically, when i turn the "feedback" pot more than 50%, it goes crazily loud with a huge oscilation..
Does anyone have the measured values which i can check ?
thanks!
Check your solders and the component values.maybe you have changed resistor values by mistake.Anyway, the oscillation is normal to occur.There is a resistor that controls the amount of oscillation you can get at max
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Thanks guys.
The solder points seems ok.
It has something to do with power supply. When using the battery it work like a charm. When i plug the 1Spot than the trouble starts.
By the way, the only mod i did was a 78L05 instead of the 7805. I had only to invert the position. Could be here a problem with a unregulated DC?
Cheers
First have you switched the pt2399 out to see I it was consistent? Also have you jumpers pins 3 and 4? This seems to be a consistent fix for this pedal but only because the repeats seem to stop not runaway.
Quote from: jimilee on November 02, 2013, 09:17:45 PM
First have you switched the pt2399 out to see I it was consistent? Also have you jumpers pins 3 and 4? This seems to be a consistent fix for this pedal but only because the repeats seem to stop not runaway.
Hey Jimilee,
i´ve seen some of your comments in other threads regarding this jumper. I didnt see this problem and i dont have this jumper but i did on the TL072.
if im using battery there is no problem. The prob is only with my 1spot.
maybe something related to unregulated DC?
cheers
Probably so. Measure it with your dmm and see if it's gone crazy on you. I had one that decided it was done and put put crazy power but it was only noticeable with a phaser. Then I bought an mxr power supply on eBay. My sea urchin is in a 1590b and I was too chicken to try to fit space for a battery in there.
Looks like it could be the power supply. I have a couple of switch mode power supplies and my Stage Fright and Harbinger don't like them at all. They produce lots of noise and oscillation. The power supply introduces this noise into the audio path. That's why it works with a battery. Clean DC.
Sent from my GT-I9100 using Tapatalk 2
Damn it! There is any way of regulate the dc? Im using a 1spot wallwart.
Cheers
Quote from: Gledison on November 03, 2013, 12:34:14 AM
Damn it! There is any way of regulate the dc? Im using a 1spot wallwart.
Cheers
Regulate an un regulated dc? no, the answer to your question though would be to use a battery. Although that power distributor rej built recently promises to be less noisy. If you're playing shows invest in a regulated PS, if not, don't worry about it. ;D
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Quote from: jimilee on November 05, 2013, 04:03:08 AM
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Well, the IC pins voltages, voltage regulator values, etc...
Do u have it?
Thanks mate
Gledison, I followed the sea urchin doc exactly and didn't have these problems. Mine will oscillate on max feedback and the volume gets mentally loud. Like, block your ears loud. If the delay time is on short, that feedback builds up very quickly. If the delay time is on long, it takes longer. I don't think its unregulated power that's the problem. I reckon its a solder bridge or incorrect value. Sounds like your feedback is on max at half turn of the pot or an incorrect value for a cap / res onboard that is having an equivalent effect.
Paul
Quote from: chromesphere on November 05, 2013, 11:18:46 AM
Gledison, I followed the sea urchin doc exactly and didn't have these problems. Mine will oscillate on max feedback and the volume gets mentally loud. Like, block your ears loud. If the delay time is on short, that feedback builds up very quickly. If the delay time is on long, it takes longer. I don't think its unregulated power that's the problem. I reckon its a solder bridge or incorrect value. Sounds like your feedback is on max at half turn of the pot or an incorrect value for a cap / res onboard that is having an equivalent effect.
Paul
Heyyy the Master!
Paul, i have only the pcb layout, no full standard madbean doc:(
If was a solder bridge it wouldnt work with batery as well right? With battery i have no problem whatsoever! Only with the 1 Spot pluged in!
My only substitutiion is a 78L05 instead of the 7805! Ive checked the datasheet and i har to flip the regulator position, emmiter and collector have diff pinouts.
Could be this the cause?
Gledison
Quote from: Gledison on November 05, 2013, 08:15:35 AM
Quote from: jimilee on November 05, 2013, 04:03:08 AM
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Well, the IC pins voltages, voltage regulator values, etc...
Do u have it?
Thanks mate
i can get that to you tonight
Quote from: jimilee on November 05, 2013, 05:35:01 PM
Quote from: Gledison on November 05, 2013, 08:15:35 AM
Quote from: jimilee on November 05, 2013, 04:03:08 AM
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Well, the IC pins voltages, voltage regulator values, etc...
Do u have it?
Thanks mate
i can get that to you tonight
Thanks Jimi!!
Master :o I don't think so Gledison :)
Im not sure about the regulator. I had a rebote once that I was powering off 9v battery. The battery went flat and the rebote when absolutely mental. Ear piearcing. Nearly deafened me. Maybe your circuits not getting enough power or maybe the dc power pack isn't outputting enough?
Paul
Quote from: Gledison on November 05, 2013, 06:05:44 PM
Quote from: jimilee on November 05, 2013, 05:35:01 PM
Quote from: Gledison on November 05, 2013, 08:15:35 AM
Quote from: jimilee on November 05, 2013, 04:03:08 AM
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Well, the IC pins voltages, voltage regulator values, etc...
Do u have it?
Thanks mate
i can get that to you tonight
Thanks Jimi!!
De Nada
PT2399
5 2.4
2.4 2.4
0 2.4
0 2.4
2.9 2.4
2.4 2.4
.2 2.4
.6 2.4
TL072
4.2 8.4
4.2 4.2
4.1 4.2
0 4.1
Regulator
8.4
0
4.9
Quote from: jimilee on November 06, 2013, 02:14:24 AM
Quote from: Gledison on November 05, 2013, 06:05:44 PM
Quote from: jimilee on November 05, 2013, 05:35:01 PM
Quote from: Gledison on November 05, 2013, 08:15:35 AM
Quote from: jimilee on November 05, 2013, 04:03:08 AM
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Well, the IC pins voltages, voltage regulator values, etc...
Do u have it?
Thanks mate
i can get that to you tonight
Thanks Jimi!!
De Nada
PT2399
5 2.4
2.4 2.4
0 2.4
0 2.4
2.9 2.4
2.4 2.4
.2 2.4
.6 2.4
TL072
4.2 8.4
4.2 4.2
4.1 4.2
0 4.1
Regulator
8.4
0
4.9
Obeigado Jimi lee!
How do u know i speak portuguese?:S
Cheers
Quote from: chromesphere on November 05, 2013, 10:17:51 PM
Master :o I don't think so Gledison :)
Im not sure about the regulator. I had a rebote once that I was powering off 9v battery. The battery went flat and the rebote when absolutely mental. Ear piearcing. Nearly deafened me. Maybe your circuits not getting enough power or maybe the dc power pack isn't outputting enough?
Paul
Hahah! For me you will be. Your videos put me in this hobby!!
Mate, ive got the values feom Jimi Lee and will check it out! One thing for sure is that rhe 1Spot output is constantly 9,3V
Cheers
Quote from: Gledison on November 06, 2013, 08:26:43 AM
Quote from: jimilee on November 06, 2013, 02:14:24 AM
Quote from: Gledison on November 05, 2013, 06:05:44 PM
Quote from: jimilee on November 05, 2013, 05:35:01 PM
Quote from: Gledison on November 05, 2013, 08:15:35 AM
Quote from: jimilee on November 05, 2013, 04:03:08 AM
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Well, the IC pins voltages, voltage regulator values, etc...
Do u have it?
Thanks mate
i can get that to you tonight
Thanks Jimi!!
De Nada
PT2399
5 2.4
2.4 2.4
0 2.4
0 2.4
2.9 2.4
2.4 2.4
.2 2.4
.6 2.4
TL072
4.2 8.4
4.2 4.2
4.1 4.2
0 4.1
Regulator
8.4
0
4.9
Obeigado Jimi lee!
How do u know i speak portuguese?:S
Cheers
magic!
Quote from: jimilee on November 06, 2013, 02:15:23 PM
Quote from: Gledison on November 06, 2013, 08:26:43 AM
Quote from: jimilee on November 06, 2013, 02:14:24 AM
Quote from: Gledison on November 05, 2013, 06:05:44 PM
Quote from: jimilee on November 05, 2013, 05:35:01 PM
Quote from: Gledison on November 05, 2013, 08:15:35 AM
Quote from: jimilee on November 05, 2013, 04:03:08 AM
Quote from: Gledison on November 04, 2013, 10:48:55 PM
Quote from: jimilee on November 02, 2013, 07:29:09 PM
I noticed some stuff like that as well but it's controllable. Still sticking with the cave dweller though. I am out if town or I would have posted the values.
Hey mate, could you send me the values for the sea urchin components?
thanks a lot!
Gledison
like the build docs?
Well, the IC pins voltages, voltage regulator values, etc...
Do u have it?
Thanks mate
i can get that to you tonight
Thanks Jimi!!
De Nada
PT2399
5 2.4
2.4 2.4
0 2.4
0 2.4
2.9 2.4
2.4 2.4
.2 2.4
.6 2.4
TL072
4.2 8.4
4.2 4.2
4.1 4.2
0 4.1
Regulator
8.4
0
4.9
Obeigado Jimi lee!
How do u know i speak portuguese?:S
Cheers
magic!
What a hell? ;)
PT2399
5 2.4
2.4 2.4
0 2.4
0 2.4
2.9 2.4
2.4 2.4
.2 2.4
.6 2.4
TL072
4.2 8.4
4.2 4.2
4.1 4.2
0 4.1
Regulator
8.4
0
4.9
[/quote]
Sooo,
my values with the battery are relatively similar.
With the PS , things are a bit different.
I've noticed that with a PS the values on pins 3 and 4 should be 0. My pin 4 is always giving some leak (0,25V)
on the regulator:(im using a inverted 78l05)
7,7
0
6,8V
This leakage on pin 4 could be the prob? or the regulator values?#the TL072 is fine.
ive checked the pins 3 and 4 and there is no bridge between than, only when the IC is plugged.
any ideas??
cheers
Different regulator maybe? Then maybe the ps
Quote from: jimilee on November 07, 2013, 12:41:07 AM
Different regulator maybe? Then maybe the ps
Hey Jimi, did u use the LM7805 with this enclosure?
Nope, I will have to look to see which one I used. I don't remember right off. I should have looked when I took readings, but the writing is so tiny.
Jimi, no need man!
The problem was solved quicker than expected!!
I've read that the 78L05 has an inverted pinnout compared to the suggested 7805!
first build!
BUT, in the layout I've got , is showing the orientation of a 78L05! I know I should have followed the schematics and the pcb traces, but following the datasheet it was obvious that I should invert mu 78L05 in order to fit in this 7805 layout.
Actually, I inserted the 78l05 in the same orientation as the 7805 and I've got the perfect measurements!!! How odd is this? or the noob here is so stupid? I don't get it!!
Cheers
Yaaaayy!
Quote from: jimilee on November 07, 2013, 07:30:39 PM
Yaaaayy!
You saw this pinnout diagram? the 78L05 I've got have different layout! damn it!
Valeu a ajuda Jimmi!
I did, that's really strange. It's all that metric stuff man.
Yes. The 7805 and 78L05 have different pin outs. The former is good to about 200mA while the 78L05 can do around 1A.
I would make sure you didn't toast yours by hooking it up backwards. If you are reusing it I would toss it in a breadboard to see if it's still good. Otherwise you may Shea-doobie your PT2399 if the reg is popped.
Quote from: rullywowr on November 07, 2013, 08:19:13 PM
Yes. The 7805 and 78L05 have different pin outs. The former is good to about 200mA while the 78L05 can do around 1A.
I would make sure you didn't toast yours by hooking it up backwards. If you are reusing it I would toss it in a breadboard to see if it's still good. Otherwise you may Shea-doobie your PT2399 if the reg is popped.
Hey rullywowr.
Actually this is the weird thing! The 78L05 i has the input on the right side and the output on the left (facing the flat surface) . Looking to the madbean sea urchin layout, the orientation for the 7805 showed is thw same for the 78L05!
Orr im missing something! Anyways, ive got the measures and everything is fine! Just the PT2399 get hot ! Is this normal?
Cheers
Quote from: Gledison on November 08, 2013, 07:33:49 AM
Quote from: rullywowr on November 07, 2013, 08:19:13 PM
Yes. The 7805 and 78L05 have different pin outs. The former is good to about 200mA while the 78L05 can do around 1A.
I would make sure you didn't toast yours by hooking it up backwards. If you are reusing it I would toss it in a breadboard to see if it's still good. Otherwise you may Shea-doobie your PT2399 if the reg is popped.
Hey rullywowr.
Actually this is the weird thing! The 78L05 i has the input on the right side and the output on the left (facing the flat surface) . Looking to the madbean sea urchin layout, the orientation for the 7805 showed is thw same for the 78L05!
Orr im missing something! Anyways, ive got the measures and everything is fine! Just the PT2399 get hot ! Is this normal?
Cheers
Uh no. How hot? I'd get a new reg
Quote from: jimilee on November 08, 2013, 02:20:24 PM
Quote from: Gledison on November 08, 2013, 07:33:49 AM
Quote from: rullywowr on November 07, 2013, 08:19:13 PM
Yes. The 7805 and 78L05 have different pin outs. The former is good to about 200mA while the 78L05 can do around 1A.
I would make sure you didn't toast yours by hooking it up backwards. If you are reusing it I would toss it in a breadboard to see if it's still good. Otherwise you may Shea-doobie your PT2399 if the reg is popped.
Hey rullywowr.
Actually this is the weird thing! The 78L05 i has the input on the right side and the output on the left (facing the flat surface) . Looking to the madbean sea urchin layout, the orientation for the 7805 showed is thw same for the 78L05!
Orr im missing something! Anyways, ive got the measures and everything is fine! Just the PT2399 get hot ! Is this normal?
Cheers
Uh no. How hot? I'd get a new reg
haha, I already love this Pedal. it has personality. I think it was jus horny.hahaha
That was during the measurement. I think im not suppose to measure the regulator voltage with the IC on... Anyways, now I played for a while and is not getting even warm. Started finishing the enclosure with the decal and the first clear coat! This month I will win some prize.....ehheheh
cheers Jimi!
Nice going. I love me some delay.