HP8642B Signal Generator Mod

A quick mod post here. I saw this post by Kerry Wong, and having the same hardware myself (and finding the backlight ridiculously dim) I thought this mod was a great idea and wanted to try it myself. First, here is a shot of the original backlight:

HP8642B-OrigBL

I pulled the front panel apart, and decided to use white SMD LEDs for my replacement mod:

IMG_5664

After soldering up everything and reassembling (and of course cursing a lot due to the number of defective white LEDs that I didn’t realize that I had), the result is beautiful!

 

HP8642B-Mod

And here is the same Easter egg that Kerry found (hold down the MSSG key while powering on the unit):

HP8642B-ModBL1

 

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