The 9805A by Victor is a really good, moderately priced meter. I like it particularly well because it will not only do the standard voltage, resistance, and current measurements, it will also do inductance, capacitance, and frequency. And, the value ranges provided are in the ballpark for what we see in PTP guitar amps. It also has a temperature probe which is great for monitoring transformers and other devices for problems. At this price, if you blow one up it’s cheap enough to just toss it and buy a new one. Incidentally, I’ve had a 9805A for almost two years and I haven’t blown it. On the contrary, I decided to try one because my Fluke died, it wasn’t that old, and the repair cost was too high for me to justify. I think Fluke just replaces the entire guts as standard repair.