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|25th January 2012, 07:08 PM||#1|
Join Date: Jan 2012
Rat Problem tonepad
Hello, I hope you are well.
I am new to the forum, my English is not very good, I hope they know excuse.
I have a problem with the pedal tonepad The Rat.
Well, after having a bad accident with the first attempt by Proco Rat, I decided to make the Tonepad, as many told me that I worked very well.
I did everything, PCB, soldering, etc.., But I get the same problem as with the first, if I put the volume pot half hummmmmm is heard, but the guitar sounds, if you put to the maximum or minimum disappears but the guitar does not sound either, I went crazy looking for what may be the error.
The first thing I did was to give the page Stomps, I was really going crazy this as more than 2 weeks ago I am for him and not get it to work. It will replace the potentiometers in case, but neither worked.
I hope I can help and can not find the solution anywhere.
The transistor is a BF245C, the diodes are 1N4148, the IC is LM308N, because here I could not get all the components that request.
I leave some pictures and voltage itself.
9v Battery --- 8.51v
G --- 0.00
S --- 4.09
D --- 8.48
|8th March 2012, 11:27 PM||#3|
Join Date: Jan 2011
Mcgiver, La Rata (Tonepad's RAT) works fine.
First off all, you should be more patient.
Obviously, there are some errors in your RAT.
You did a good job, providing the IC, and transistor voltages.
There is something wrong with LM308N voltages. They should be something like this:
Pin 1 - 8.4v
Pin 2 - 4.5v
Pin 3 - 4.1v
Pin 4 - 0v
Pin 5 - 0v
Pin 6 - 4.5v
Pin 7 - 9v
Pin 8 - 4.6v
BF245 have different pinout than 2N5458 that is suggested by Tonepad.
Is your BF245 properly oriented?
You should have posted this at
DIYstompboxes.com - Index
Last edited by karul; 8th March 2012 at 11:32 PM.
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