I'm thinking of buying this Admiral

[MadMan]

Ok. So.

I was thinking (yeah I know, that's my problem right there) if I could increase the voltage going through the focus coil it might focus the picture better. To do this, I used my decade box to put a resistor across the focus pot, and it worked. The picture was razor sharp. Though, come to think of it, I'm not entirely sure if the resistance I added increased or decreased the voltage through the coil. :/

I only had it on there for a minute max, but when I removed it, the picture was blurry as hell. I let the set cool off and it seems to be almost back to its normal level of blurriness.

Did I break something?