HELP WITH VIBRACASTER

[lluis3.0]

Hello everybody

First post here,

I've built this valvecaster based on Renegradian's vero layout

http://www.aronnelson.com/gallery/main.php?g2_view=keyalbum.KeywordAlbum&g2_keyword=Vibracaster&g2_itemId=38094

But all i have is an oscillated hum.... All the pots seem to act correctly, but there's a terrible oscillating noise and the guitar sounds very weak.

My transistor are B547TF, and while i was triple cheking the circuit, i founded that my r5 resistor is 3M9.

Any idea???

Thank you very much for your brilliant job, and sorry for my poor English!!

[samhay]

What valve are you using?
Does it work at 12V?

[lluis3.0]

Hello,

I'm using a 12au7.

And yes, it works at low voltatge, I built a Valvecaster long ago and it worked perfectly.  http://www.diystompboxes.com/smfforum/index.php?topic=63479.0

Thank you