I got two old analog scopes for just $50 for both.
They've seen better days:
The top one is a Tek 7613 with 2 80 MHz amplifiers and a 100 MHz dual time base. One of the amplifiers has a broken voltage divider knob but luckily the broken off cal knob is in the cal position, so I won't be able to exit the cal value on that channel to make it fit on the screen but that's ok.
The bottom one is a Tek 5110 with two 2MHz amplifiers without a time base.
The only thing I've done so far is clean the screen and trim the gain and sweep on the 7613
Here is a picture of a 26MHz clock (OCXO) 5 Vpp using a x10 probe (so 1 V per division) at the maximum x1 time divider (50ns per division) if you notice I get 13 full cycles in 500 ns.
Here is the same signal but using the x10 magnification in the time base module, so it's 5ns per division.
A 26MHz clock has a period of ~38.46154 ns divided by 5ns that will give me ~7.7 divisions.
Goes to show you that back then you had to do the math to figure out the frequencies and you only could use the grid, DSOs are so much easier.
This one has storage and persistence but I rather don't use it, it's a pain.
My plan is to clean them up, maybe pickup some modules (for example 100MHz amplifiers) for them and donate them to a local hackerspace.
The 7613 has a sawtooth generator in the back, that is controlled by the time division knob up to 560 KHz at the 50ns setting down to 18.73mHz at the 5s setting (takes over 50 seconds to do one period) and I can trim it to any frequency using the cal knob.
This probably can used that to make a curve tracer using a different scope or maybe even the same one. Will have to revise alan's video (W2AEW) if I could use the timebase that affects the frequency of the sawtooth.
The crud on the screen was hard to dissolve (I used water and a bit of soap followed by my fingernail so I won't scratch anything), Also I'm not sure why both of them had some tape residue in the screen, it felt like hard glue, but believe it or not, it was harder to remove the splatter of who knows what.
Not sure what to use to clean the splatter on the rest of the scope without affecting the legends. Also not sure what to use to clean the BNCs they are crusty beyond believe.
The 2MHz scope is a 5000 series, not sure if I can get better plugins for it, but one of the knobs in one of the amplifiers broke, but it can take up to 60 volts AC or DC, I need a horizontal base for it or just use it to draw vector graphics
The 5110 calibration hook is 400 mV 4 mA 2x mains frequency (120Hz)
Not really a score since they are old and I already have a 7603 but has a bad dual trace amplifier.
Other than the sawtooth thing they are not that great compared to my Rigol DS2072, but for the price I couldn't pass it up and will try to bring them back to their former luster.