Hi guys. I'm a complete noob to DIY stompboxes and I'm trying to make a built-in boost circuit for a tube radio which I've converted to an amplifier. It gives away a pretty nice clean tone at the moment but I'd want to be able to make it break up a bit more.
So I found the following video and ordered all the parts: https://www.youtube.com/watch?v=ANkNvOFgYKk
However, for various reasons I only have access to a 12v DC power transformer, and no possibility of getting a hold of a voltage regulator before thursday (for when the project needs to be finished).
So my question is, will the circuit function on 12v instead of 9v? What do you think will happen? I couldn't find a circuit diagram but I will post a print screen of the video showing the connections. I know I could use a 9v battery of course but it would be sub-optimal in this case. Thankful for any help.
(https://i.postimg.cc/Lnt6T28H/Screenshot-2021-02-23-at-19-01-06.png) (https://postimg.cc/Lnt6T28H)
Yes, it should work just fine. Although I suspect the 830k resistor in the parts list is a misprint and should probably be 820k.
IMHO, with values shown it should be misbiased (saturated) for 12V PS..
(sorry Mark..) :icon_redface:
{[(12*100k/920k) - 0.65] / 360}*10k = 18V drop on Collector resistance..
Replace 830k with 1M and 360R with 680R..
(results into 23dB instead of 28dB gain which is more sensible for a booster..) :icon_wink:
(https://i.imgur.com/dr3jfsF.png)