When you're diagnosing a switching power supply or capturing a slow protocol signal, a 100 MHz two-channel digital oscilloscope is a familiar target. The HP 54600B is a used instrument priced at USD 135, and it arrives with a front cover and case. The question isn't whether 100 MHz is enough for typical bench work-it usually is-but whether this particular used unit makes sense for your setup.
Quick verdict
If you need a straightforward two-channel digital scope and you're comfortable with used test equipment, the HP 54600B is a reasonable buy at USD 135. It's a 100 MHz digital oscilloscope from HP, and it has been tested to power on. The included front cover and case help with storage. The trade-off is that you're getting a no-frills instrument, not a deep-memory analysis tool.
Who it suits
This scope suits hobbyists and repair technicians who work on analog audio circuits, power supplies, Arduino or basic MCU signals, and general prototyping. Because it has only two channels, it's less ideal for mixed-signal setups where you need four channels and advanced triggering. But for the price, the HP 54600B gives you a solid entry point.
What stands out from the listed details
The main specs jump out: maximum bandwidth of 100 MHz and two channels. That's plenty for a lot of diagnostic work. The unit is described as being in great condition and pulled from a working environment. It's a digital oscilloscope, which means you get the stability and readout features that analog scopes don't offer. The front cover and case are part of the listing, so you can store it on a shelf without hunting for a clamshell later. At USD 135, it's a practical price for a used scope with these capabilities.
Another useful detail is that the HP 54600B has been tested to power on. That doesn't promise perfect calibration, but it does mean the unit is at least operational at start-up. For a used scope, that's a solid baseline.
Meaningful trade-offs
The biggest limitation is the accessory situation. The listing includes the front cover and case, but it does not list probes, power adapters, or other accessories. If you don't already own 100 MHz probes or a compatible power cord, you'll need to factor in those costs. Check the main image to see exactly what's included.
Also, "tested to power on only" means the seller hasn't verified every function, like channel accuracy or triggering. That's common for used gear, but it's worth keeping in mind for a scope that you'll rely on for measurements. If you need calibrated performance, you'd want a unit that's been through more thorough testing.
Bottom line
The HP 54600B Digital Oscilloscope with front cover and case is a practical pick at USD 135 for anyone who needs a 100 MHz two-channel digital scope for everyday bench work. It's not loaded with extra accessories, and it hasn't been fully bench-verified, but it's a capable instrument from HP at a price that's easy to digest.
HP 54600B Digital Oscilloscope W/ Front Cover + Case
This is a used HP 54600B digital oscilloscope with 100 MHz bandwidth and two channels. It comes with the front cover and case, and it has been tested to power on. The unit was pulled from a working environment, which is a good sign for a used scope at this price. The main drawbacks: no listed probes or power adapter, and only power-on testing has been done. If you already have accessories or can live with the included items, this is a compelling option for basic two-channel measurements.
