brian
Moderator   Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 7/20/2006 at 09:18, Reply 10 |
I agree!
1. make sure all grounds are connected
2. make sure the opt amp is facing the right direction
3. make sure the Electrolytic Caps have the + side in the right
direction
4. make sure you have the right wires going to the sleeve,ring,tip
etc.....
5. make sure all the parts your using work!
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brian
Moderator Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 7/20/2006 at 11:31, Reply 11 |
I moved thos topic to our new froum DIY Guitar Effects!
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erwin27
First Lieutenant   Posts: 6 Registered: 7/18/2006 Status: Offline |
posted on 7/20/2006 at 13:03, Reply 12 |
hey thanks guys for all the help much appreciated!
well i scraped everyhting this morning and built it over from scratch.
and guess what? same problem! lol. its sooo frustrating and im basically
100% sure that i did all those things you told me to.
should my circuit even work to begin with?
i know the IC is working because there is a small ouput voltage which is
about 200 times that of whatever input voltage. the input voltage is seems
to be receviing is just like noise. no actual voltage signal from the
guitar and i was sure the guitar volume was up and everything...so i really
am stumped here.
but thanks again for the help, if you guys have anything to add u can post
it!
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brian
Moderator Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 7/20/2006 at 13:24, Reply 13 |
are you getting any sound at all? One common mistake is having the opt amp
in backwards..
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brian
Moderator Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 7/20/2006 at 13:25, Reply 14 |
did you make this circuit yourself?
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brian
Moderator Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 7/20/2006 at 13:33, Reply 15 |
I aslo take it you have the right wires go to ring and sleeve on the 2 mono
jacks right
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erwin27
First Lieutenant Posts: 6 Registered: 7/18/2006 Status: Offline |
posted on 7/21/2006 at 00:16, Reply 16 |
yea well i kinda did this by myself, well i saw a schematic for a headphone
amp, and well from that i got the idea to do this circuit, simple
amplifier, and yea the op amp is in the correct position.
and well as for the wires, the middle prong of the jack is the sleeve
right? and the other prong can be the tip. i tried either sides of the
sleeve as the tip and no success either.
maybe it really is a problem with the actual circuit
but at least i should be getting a voltage at the input of the IC. i.e. the
votage drop across the 100k which goes to the + input of the IC.
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brian
Moderator Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 7/22/2006 at 14:26, Reply 17 |
yep sounds like you have the jacks wired correctly... There's so many
things that could be wrong. If I was there I could see and debug the
problem in a matter of seconds. Try other IC and see what happens! 
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oldrockerguitarist
First Lieutenant Posts: 7 Registered: 5/17/2007 Status: Offline |
posted on 5/17/2007 at 12:20, Reply 18 |
This is the headphone amp I built as a headphone distribution system to
record a band. It worked excellent and you can just build half of it if
mono is OK for you. Or at least look at it to compare it to your build.
[Edited on 5/17/2007 by oldrockerguitarist]
[Edited on 5/17/2007 by oldrockerguitarist]
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brian
Moderator Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 5/17/2007 at 13:39, Reply 19 |
Thanks for the pics and info!
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