That's why I use all svg now on TMN... but @spudler_t said jpeg originally.
Here' some vector graphics.
:: Main Logo ::
https://tmnstatic.com/img/tmn_logo.svg
:: Testing Logos ::
https://tmnstatic.com/img/tmn_logo-18.svg
If you're putting it on a dark or black background this version will look better.
https://tmnstatic.com/img/tmn_logo-18-dark.svg
Or if you'd rather use the orange version (that you see on the upload test)
https://tmnstatic.com/img/tmn_logo-18B.svg
and orange logo for use with a dark or black background
https://tmnstatic.com/img/tmn_logo-18-darkB.svg
I'm looking for the svg for the logo text and will post that for you when I find it.