how much power should give guitar ???

prorms

Member
2006-11-15 2:28 am
i clear up the problem my guitar was not gettting any power form the preamp i put 2 resistors to vcc and vss or v+ and v-
give it 600mv what difference thier value 2.2m at the very start of the circuit as long as dont give amperage will burn out the coils
make sure connect guitar cable the postive to the circuit and ground to the ground the powersupply i have has a postive and a negetive and a ground before get horible hiss noise when the guitar volume was turn about 1/2 way when guitar is hookup to the preamp the meter only reads 5 mv
 
prorms said:
i clear up the problem my guitar was not gettting any power form the preamp i put 2 resistors to vcc and vss or v+ and v-
give it 600mv what difference thier value 2.2m at the very start of the circuit as long as dont give amperage will burn out the coils
make sure connect guitar cable the postive to the circuit and ground to the ground the powersupply i have has a postive and a negetive and a ground before get horible hiss noise when the guitar volume was turn about 1/2 way when guitar is hookup to the preamp the meter only reads 5 mv

I've no idea what on earth you're on about?, it's a complete load of rubbish!.

Assuming it's a passive guitar there's no power required of any kind.
 
prorms said:
i clear up the problem my guitar was not gettting any power form the preamp i put 2 resistors to vcc and vss or v+ and v-
give it 600mv what difference thier value 2.2m at the very start of the circuit as long as dont give amperage will burn out the coils
make sure connect guitar cable the postive to the circuit and ground to the ground the powersupply i have has a postive and a negetive and a ground before get horible hiss noise when the guitar volume was turn about 1/2 way when guitar is hookup to the preamp the meter only reads 5 mv

Hmmm.........

Pretty high of standard of gibberish and not too good English.
I can surmise you are on about the correct biasing of your pre-
amplifier input transistor, if this is AC coupled as should be
then there is no issue with "burning out" the coils.

Its fairly obvious to most of us how to connect the input cable.

Presumably you have not got to correct R.F. input filtering .......

:)/sreten.
 

Zero Cool

Member
Paid Member
2004-09-20 6:10 am
MN
it sounds like he is trying to put power through the pickup coils for some odd reason???? and that he pre-amp has a lot of hiss. maybe he is trying to apply bias to the pick ups as some way of reducing hiss????


Pick ups are like a (dynamic) microphone. they do not require power to be applied to them.


Now i wonder if he has active pickups in his guitar. in which case there is a small preamp in the guitar usually run by a 9V battery. sometimes two 9V batteries for basses. I wonder if thats what he talking about???
 

petarkb

Member
2008-01-11 12:26 pm
Why are you all assuming dynamic pickups? Those days they sell acoustic guitars with piezos and a preamp (and EQ!) so cheap that even people with really really bad English can afford them (just kidding).

Then again, it doesn't make much sense, if the guitar came with the piezos and the preamp it wouldn't need fixing.

To the OP:
1) Is the guitar solid-body or acoustic?
2) Did it come with the preamp?
3) Did it work before?

If you answer those questions, people will help you.
 

poynton

Member
2005-03-10 11:57 pm
UK
prorms said:
i clear up the problem my guitar was not gettting any power form the preamp i put 2 resistors to vcc and vss or v+ and v-
give it 600mv what difference thier value 2.2m at the very start of the circuit as long as dont give amperage will burn out the coils
make sure connect guitar cable the postive to the circuit and ground to the ground the powersupply i have has a postive and a negetive and a ground before get horible hiss noise when the guitar volume was turn about 1/2 way when guitar is hookup to the preamp the meter only reads 5 mv

I've tried Babelfish in all known languages (and Welsh) and still cannot work out what he means!

I'm not sure but I think he may have solved his original question in post 1 and created another?

"I clear up the problem."
"My guitar was not getting any power form [from] the preamp."
"I put 2 resistors to vcc and vss or v+ and v- [to] give it 600mv."

gobbledegook

"The power supply I have has a positve and a negative and a ground."
"before get horible hiss noise when the guitar volume was turn about 1/2 way"
"when guitar is hookup to the preamp the meter only reads 5 mv"

Give up...



Andy