Rustyroadie
New Member
Hi,
Greetings! new memeber here, glad to have found this forum...
Anyway, could anyone shed a bit of light on this?
I am constructing a guitar amp from some old schematics, and a few half built pcbs...Im having a bit of a problem with the HT power (used for the tube). I have an AC supply of about 80V, when I connect up the following circuit, i only get about 40v DC out of it, and when i connect it up to my preamp, it drops to about 15v DC. Looking at the scope, the wave on the AC input changes to pretty much a square wave with a voltage of about 20V AC. I should be getting a pretty high voltage at the output....what is the purpose of the transistor? and what could be causing the low output?
Cheers!
Greetings! new memeber here, glad to have found this forum...
Anyway, could anyone shed a bit of light on this?
I am constructing a guitar amp from some old schematics, and a few half built pcbs...Im having a bit of a problem with the HT power (used for the tube). I have an AC supply of about 80V, when I connect up the following circuit, i only get about 40v DC out of it, and when i connect it up to my preamp, it drops to about 15v DC. Looking at the scope, the wave on the AC input changes to pretty much a square wave with a voltage of about 20V AC. I should be getting a pretty high voltage at the output....what is the purpose of the transistor? and what could be causing the low output?
Cheers!