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Messages - don72129

#1
Tech Help - Projects Page / Re: Ping debug help
October 30, 2016, 10:57:13 PM
Ok so I check the left pin of C1 and R2 to make sure it wasn't connected to ground. Everything shows to be good. I also used a razor blade and carefully scraped around the suspect pins. No positive results. I've lifted the left pins of C1 and R2 off the board and connected them leaving right side pins connect. That didn't work either. I'm going to walk away for a few days and come back to it. Thanks m-Kresol it was good advise


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#2
Tech Help - Projects Page / Ping debug help
October 30, 2016, 02:42:22 AM
I've experienced a problem I haven't had before building pedals and need a little advice.
Building the Ping reverb. I have a good bypass signal and a good signal with the pedal turned on but no effect.
Using an audio probe I found that I have signal to C1 but not through C1. No signal anywhere else on the board. I replaced C1 but still same results. I have good voltage through the board (5.06vdc pin 1 on BTDR-3)
I can send pics of board if needed. 

I have it on my test board now. Here's the debugging steps I've taken:
Voltage- almost exactly the same as Brian's on the .pdf
Flowed all solder points- no bridges (continuity check)
Swapped opamp (TL072) three times also swapped transistor (2n5088)
Doubled checked all values of components
Used audio probe
I also built the Mimik and Glam the same day and tested them with the same test board- works great
Any help would be appreciated
Thanks
#3
Quote from: madbean on March 28, 2015, 01:19:07 AM
What kind of DC jack are you using?
As soon as you asked this I realized this was my problem.  Thanks Madbean!
I was using a new mini DC jack I bought from Tayda. Just trying to save a little space.   
http://www.taydaelectronics.com/hardware/dc-power/dc-power-jack-2-1mm-bulkhead-type-panel-mount.html
You guessed it, metal frame dc jack.
I put the Lumbreg type that you suggested on the build plans.  Now the Sparklehorn rocks! Thanks again
Also, thanks to Jimilee to responding also!!

#4
I've having an issue that I've never encountered before and it's got me stumped. 
I've built the SparkleHorn 2014 ver. and I did "rock it before I boxed it". However, when I boxed it up, applied 9Vdc, nothing, no power. I do have sound in bypass though.   I wired the sleeves of the input/output jacks together, still no power. (I used mono metal frame jacks and made positive no parts were touching the board and doubled check wiring on both switches.) 
THIS IS THE CRAZY PART. I then took the input/output jacks out of the box, left everything else in the box,  plugged back in guitar and amp.  Everything works just as it should. With no buzzing or hissing.  Really sounds great.   
When I jump the sleeves of the input/output jacks to the box, I lose power again.
My question is "Why is it grounding out"? when nothing is touching that's not supposed to be and I used metal framed jacks.
Thanks for your help in advance.
don72129