gofar99 Messages: 1947 Registered: May 2010 Location: Southern Arizona
Illuminati (5th Degree)
Hi, I have a tube one recently posted on diyaudioprojects.com
Reasonably easy to build , but certainly not as simple as a SS one.
I am still traveling so I can't tell the brand...but there is a small one similar to the link you provided sold by Parts Express for as I recall around $25. It is about 1.5 X 1.5 x 0.25 inches in size and is rechargeable. Works great. Not a kit though. I use mine to test equipment that doesn't have power output stages. Good for about 100mw.