Hi, I made a video of this little amp.
It's a single ECL86, with a real PT, salvaged from an old dual amp.
Recently I saw a philco signal tester on ebay, but couldn't buy it. In the end it gave me this design idea.
this one is the original one, couldn't find more pics.
![](http://boatanchorpix.x10host.com/TubeProb.jpg)
And my version:
![](http://i.imgur.com/2TcIXY4l.jpg)
![](http://i.imgur.com/k0GWNR7l.jpg)
The circuit is very basic, would benefit from some tone shaping.
And a video>
It's a single ECL86, with a real PT, salvaged from an old dual amp.
Recently I saw a philco signal tester on ebay, but couldn't buy it. In the end it gave me this design idea.
this one is the original one, couldn't find more pics.
![](http://boatanchorpix.x10host.com/TubeProb.jpg)
And my version:
![](http://i.imgur.com/2TcIXY4l.jpg)
![](http://i.imgur.com/k0GWNR7l.jpg)
The circuit is very basic, would benefit from some tone shaping.
And a video>