OT: Semi-functional scope?

<There is a metal can on the back of the chassis that has a bit of rust on <the outside, but peeking inside it looks like it is on the the transformer Rust is not a factor unless loose bits of it are in the circuts. <fortunately. As for the kind of cheapie it is, I have no idea... it's a <rebadged Heathkit sold as a "Bell & Howell Schooles Oscilloscope model <10D-4540". I'll bet it's a cheapie recurrent sweep design. if so the H sweep should have a switch that is marked internal/external... you want internal. There should be a sweep rate switch as well. lack of vertical deflection is either input set wrong, wrong gain setting or possible a input selector switch set for grounded(to zero the input). Heath would be a source for a manual in good likelyhood. Allison