Specific Change from white to black without thickening the lines

[Sms]

Hi,
Been messing with an image that I just cannot get right.
I got it to a form where it is printable on a dark background, but I need it printable on a white background as well.
Example (screenshot of result in white):

The image that can be used:

 

[thebestcpu]

Is this what you are looking for?
John Wheeler

 

[Sms]

Is this what you are looking for?
John Wheeler

View attachment 137530

That looks about right!

 

[thebestcpu]

That looks about right!

Great
John wheeler