Did I just fry my amp just messing with a l-pad?

My lack of thorough understanding is shining through.  If I short out a guitar cable for a while while trying to get the right values for an l-pad, can I f&^k up a Fender Deluxe tube amp?

I seem to have done just that, and not sure if it's just some odd coincidence and maybe a tube just went out?

Are you talking an L-Pad on the speaker on the amp? If so, if you shorted the speaker leads by accident, that could definitely be a problem!

Hi-no it was the Input to the preamplifier section with a guitar cable. I have a string of peizos on an instrument and they are way too hot, so I was trying to pad it down. But I was fiddling with the resistors while the amp was live. I did shirt the wires together, and I wasn't sure if the high impedance combined with fiddling things around could have messed up some of that solidstate crap in there (it's a hotrod deluxe).

I was starting to get a nasty low frequency buzz going and then I pulled the back cover and started poking with a sharpie and did trace the hum and made it go away when fiddling with the speaker cable, so I'm afraid it may be coincidence.

No definitely not, shorting the input to the amp will not hurt it.