News:

Forum may be experiencing issues.

Main Menu
Menu

Show posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Show posts Menu

Messages - hooperharp

#1
Problem solved. I used the values from the zero point micro. 220k input resistor, 220k for gain at the input mix, and 22k (20k in the zero point but I only have 22k) for the gain on the output opamp. No noticeable distortion on the first repeat.
I can tell that repeats on pt2399 delays aren't clean, but the first repeat just was unbearably ugly. Now it's flowing (best description I can give haha).
I'll definitely breadboard a delay and try your suggestions. I'll also try the Led from pin 7 and see for sonic  improvements.
The rebote and the zero point have the same value for the input resistor and the gain on the first opamp. The sea urchin has half the value for the input resistor than the gain on the first opamp (180k and 360k respectively).
#2
I used the layout by Brian on the sea urchin topic. I'm posting the schematic. So, I reduced the resistor before the output mixing stage on the rebote and I got what I wanted, more mix, louder repeats than dry. One thing solved and one more thing I understand. Now, if I wanted to reduce gain getting to the delay, would I reduce gain on the "delay in" in the pt2399? Looking at the rebote and the sea urchin I see the resistor at the input of the circuit is higher on the rebote. Is this resistor limiting the input on the entire circuit? Thanks for helping guys. Delays are like overdrives, a personal thing as to what the "right" sound is
#3
Just read something I'll try on the rebote in another topic, "Topic: Less Delay in Mix?", raising the resistor value after the mix pot reduces mix, so I'll reducing and see if I get more mix. Still if someone knows how to reduce the first repeat's distortion on the sea urchin or a post were this has been discussed I'll appreciate it
#4
Hello guys. As for my sea urchin build, it sounds ok. not great because of one thing I'll explain in a second and see if someone can help. I've built a rebote 2.5, a cave dweller and a sea urchin. Each has it's own features and sound. The thing with my sea urchin is the first repeat. It's waaaaay too distorted. Yet this delay has great things. I love the way it oscillates (and if I set the delay just before oscillation I get a shimmery delay I love). Also how the mix control gets the delay to "take over" the sound. As for the distortion on the first repeat, it happens on all settings, from short to long delays. The next repeats are great, it's just that first one. It's not noisy, but distorted. It's like echo on max on the cave dweller and strumming really hard. This is something I don't have an issue with in the other delays. How would I go around reducing this distortion? I've been looking at the schematics and other delays (jon's hamlet, grind custom's, zero points) but I'm really not having time right now (and for some time in the future unfortunately. law student. what was I thinking!) to breadboard and try replacing components. I'm using a tlo72, yet I replaced it with 4558s and lm358s, same result, so I guess it has more to do with the design of the delay. I guess also that the components I would be changing are around pins 9 to 16 of the pt2399 (please correct me if I'm wrong). I also added modulation (led+ldr combo). Any help would be of use. It's just that first repeat that needs to be tamed, filtered, or something. Or how would I go modding the rebote (or any pt2399 delay) to make the repeats sound louder than the clean signal (like in the sea urchin)
#5
yes, that, not actually shorting the 9V.
I'll start tinkering next week, need some rest from building pedals, just finished the 27th.
Before posting about the next idea which might not work on the discussions forum, what do you guys think about adding a hold switch to a pt2399 delay? Saw this video from colin on his modified dano pb&j
http://www.youtube.com/watch?v=UBXTdAzRFLw
Those seem to use the pt2395. It would be cool to have a hold switch on a delay, not so much as a looper but as a sort of lo fi ehx freeze pedal.
Midwayfair your youtube videos are great!
#6
I was thinking about something in the veins of that, shorting the power with a momentary switch. If it won't damage anything of course. What should I look for with a multimeter to have an idea of where I could try to short stuff? I'll breadboard something and give it a try and see if something works out.
#7
Open Discussion / Re: New Tape Delay Day
March 01, 2014, 08:18:45 PM
extremely cool!! what is the date on that unit?
#8
Open Discussion / adding sort of tap tempo to pedals
February 28, 2014, 08:39:50 PM
Anybody knows how to make tremolo pedals "start" the cycle at the push of a switch? So that when the effect is on I step on a switch and the lfo starts again at that moment. What would I have to look for with a multimeter?
This would come in handy with an effect like the Repeat Percussion in slow settings, or any tremolo that can get very choppy. Or delays. I guess tap tempo does other things, but i'm thinking more of just a momentary switch that intereupts the lfo so that it starts again "from zero" (hope someone understand what i'm trying to say  :o).
I think Doug Deeper does something like this with the Pitch Pirate so that the LFO doesn't get in the audio path with the effect ON and also so that every time the effect is switched ON again the pulses start at the same point of the cycles. Hope this makes sense.

Andy Hooper
#9
Tech Help - Projects Page / Re: Loophole problem
February 23, 2014, 12:58:31 AM
That gives me an idea to try...to put a voltage sag and see if it detunes...though it didn't actually sound very useful. But could be a different sound from the detune switch (which I haven't put)
Thanks!!
#10
Open Discussion / Re: DIY Tuner possibility?
February 22, 2014, 07:46:17 PM
Hey guys, thanks ffor replying. So, the chip I thought to be part of the tuner is actually part of the amp, a TDA7267. There is a second board I hadn't noticed the first time I opened it that is connected to the LEDs and has a black blob on it, so I guess the micro controller (is it one?) is in there. And yes, I will buy a tuner pedal at some point, they're not expensive. I just thought it'd be cool to make one and I thought after looking around on the net that the only thing keeping people away from a project like this was the price point of tuners. Ok, soy from what you guys say Arduino would be a good place to start? I know nothing about programming yet I'm willing to learn and this could be a good place to start (a tuner).
Also...I will buy a tuner...but this is an interesting project I guess.
Thanks for all the useful links and info again!! :D
#11
Open Discussion / DIY Tuner possibility?
February 22, 2014, 04:32:56 AM
Hello, Andy Hooper here.
So I found no information on a DIY tuner on the net. Yes, they are the cheapest of the pedals and even cheaper for those you stick on your guitar's headstock, yet I guess it would be pleasing to make one. I bought an orange micro crush and it has a built in tuner. I opened it a while ago and couldn't find any information on the net on the chip which i guess is used for the tuner part. Anybody has any idea on this? tried it? I'll open it again tomorrow and give you the information on what I find inside.  :)
#12
Tech Help - Projects Page / Re: Loophole problem
February 21, 2014, 10:10:17 PM
update:
this whole power supply just messes up with the pedals. My woolly mammoth doesn't sound as good and my magnavibe doesn't vibe as much as with the GGG power supply. So the problem is definitely in the PS. I guess it's fine if using with just one or two pedals that don't get too messed up with it for a small travel pedalboard, but not for a main board. But if anybody knows if there is a way around it, it would be interesting to know...I'm always into learning new stuff.
#13
Tech Help - Projects Page / Loophole problem
February 21, 2014, 08:21:35 PM
Hello everybody. The problem I have with the Loophole is that when I power it up using a TP-LINK (it's the brand I believe) adapter (I believe it was for an old cell phone) and using a delay at the same time (pt2399 based) and/or the little angel chorus the playback automatically detunes. I used the beavisaudio huminator in order to use the adapter. Works perfectly except when I power the delay with the same supply. I have no problem when using the power supply built using the schematic at general guitar gadgets and using the loophole with any pt2399 pedal. Anybody knows why this might be happening and if there may be any solution?