New Project! New Problems! can you help me?

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raza
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New Project! New Problems! can you help me?

Post by raza » Sat Oct 21, 2017 2:11 pm

(First sorry for my English, Iam from spain)

I am in an other Project.
this:

Image

Well, the problem is, when I play with full gain I cant put the volumen more tan 11oclock,
A trebble noise scream apears and I can put the amp as loud that it can.

But when I put the gain at 9 I can putthe volumen at full.

What can I do?


THANKS

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neikeel
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Joined: Tue Dec 06, 2005 8:31 am
Location: Suffolk, England

Re: New Project! New Problems! can you help me?

Post by neikeel » Sun Oct 22, 2017 6:02 am

It may be worth some pictures of how you have implemented the project.

There is a lot of high frequency gain in the first three stages and you are getting cross talk with parasitic oscillation.

First thing is lead dress (grids especially) and use of good quality shielded wire in selective places (ok long runs do have capacitance and you can lose some high end - but that maybe a good thing).
Neil

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