Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Is this natural? or can I do something to remove it? Squeal starts at about 90% rotation I think
I used 5k, 3 x 20k, 1M all linear as of now. I added a switch to choose between 100pF or 220pF for C5.
Here's the layout I made but there were some slight changes in the actual build
(https://s20.postimg.org/fbh2cmuf1/Screenshot_51.png)
Here's the build ;) And I'm hoping being unshielded's not the reason for the squeal.
(https://s20.postimg.org/4m3dkdim5/Lead_12_(1).jpg)

(https://s20.postimg.org/504pjz2pp/Lead_12_(2).jpg)
Maybe the layout's the main problem?
Anyway, those red colored pads indicate tracks cut. It was some kind of stripboard something but tracks are customized by the store I bought it from

Now you know that with no shielding you will have problems.
Better go find a steel box 8|

Phil

Quote from: phatt on December 10, 2016, 02:55:41 AM
Now you know that with no shielding you will have problems.
Better go find a steel box 8|

Phil

I don't have a budget for a good box yet but I hope something like this is enough  xP
(https://s20.postimg.org/metj5zp8d/Setup.jpg)
The one in the bottom of the picture, used in making sliding windows and doors, etc

You can put it in an empty can of corn even.  I have some two and three pound cans of peanuts with paint can lids I intend to build small amps in.  Plenty of guys have used Altoids Mints tins for projects.  You don't have to BUy something, but you do want the circuit enclosed - as in all around.   But even buying, you know those tins of Xmas cookies?  They make similar tins, but much smaller, I find them at the local store - like Wal Mart or K MArt.  Or the hobby/craft store.  They are cheap, and come in all sizes from smaller than a golf ball to bigger than a -phone book.  Google "decorative tins" for examples of what I mean.  I think a tin the size of a Tube Screamer ought to cost 79 cents to a dollar.  I bet the dollar store even has some with Xmas pictures on them.

I don't see any bypass capacitors on the layout. I would suggest 100uF or 220uF on each rail to ground.