When you're shopping for RF test gear, the core decision often boils down to whether a used instrument can still do the job without draining your budget. A directional bridge is used for measuring reflections in cables, antennas, and telecom components. The HP 85020A directional bridge from Hewlett Packard is one option in this space, but this particular unit comes with condition caveats. Is it the right buy for your bench?
HP 85020A Directional Bridge 10MHz-4.3GHz RF Test Equipment
This package includes the directional bridge unit, an attached cable, and a carry/storage case. The bridge itself is a used HP test instrument manufactured in the USA. The headline reason to choose it is the broad frequency span indicated in the title: 10 MHz to 4.3 GHz, which suits many RF measurements and microwave applications. The main limitation to weigh is the deteriorated foam inside the carry case; it may need replacement or cleaning, and the unit is sold as-is.
Quick Verdict
At $500, this HP 85020A is a reasonable proposition for someone who needs a dedicated directional bridge for RF testing and understands used-equipment risk. The package is complete enough to get started, with the bridge, cable, and case included. The foam issue and the as-is status mean you could spend extra time or money making the case usable, but if you're prepared for that, the price is fair for a broad-range HP bridge.
Who It Suits
This tool fits RF technicians and engineers who already have an analyzer and need a directional bridge for reflection measurements. It's also a good match for telecom and microwave work where the frequency range matters. If you need a ready-to-run instrument with no cleanup or condition concerns, this unit may not be the best fit. The used nature and the foam problem require some tolerance for DIY upkeep.
What Stands Out
The standout is the 10 MHz to 4.3 GHz frequency range, which is the core reason to consider this bridge. That span covers a wide variety of signal testing, from lower-frequency telecom circuits to microwave applications. The included attached cable and carrying case add practical value, so you don't have to source accessories separately. The unit was manufactured in the USA, which is a useful detail to know.
Meaningful Trade-Offs
The biggest trade-off is condition. The foam inside the case has deteriorated due to age, so you may need to replace or clean it before the case offers proper protection. The unit is sold as-is, so its condition and performance are your responsibility. For $500, you're accepting the uncertainty that comes with used test equipment. The foam issue is the main hassle to weigh.
Bottom Line
If you need a directional bridge with a 10 MHz to 4.3 GHz range and you're willing to handle the foam deterioration and as-is sale, the HP 85020A can be a solid choice at $500. The included cable and case make it a ready package, but you'll need to address the foam condition. For the right buyer, this is a practical way to add HP RF test capability to the bench.
