RG58 coaxial leads

Will the cable move during use?

A technician repositioning a probe or antenna may prefer a finished stranded-center cable with suitable flexibility. The bulk RG58/U entry specifies a solid center. Check the exact cable construction, the attenuation at your operating frequency and the minimum bend radius before planning a permanent run.

Keep measurements comparable

For a repeatable bench setup, label the lead length and keep the termination arrangement recorded with the test. If the result changes after replacing a cable, repeat the measurement using the original length and settings. An advertised frequency range does not describe the loss of every possible assembly at that frequency.

How should I describe the cable when requesting a replacement?

Give the instrument model, both connector types, required impedance, operating frequency and finished length. If a rig moves frequently, also mention how the lead is handled. Those details help distinguish a flexible test jumper from a solid-center bulk spool that happens to share a similar designation.

Shorten a 50-ohm bench link without changing its interfaces

A test instrument and a compatible accessory may sit side by side after a bench rearrangement. A three-foot 10X1-01103 RG58/AU lead with BNC male ends can be easier to manage than coiling a much longer lead underneath. The listing identifies 50 ohms. Match the equipment impedance and the cable's documented frequency and loss requirements for your measurement. If the previous cable was part of a calibrated setup, follow the instrument maker's calibration or verification procedure after the change. Keep the old length and part reference in the bench notes so future measurements can be traced to the setup actually used. Tag the spare with the bench asset number and the verified cable length.

How should a measurement team choose between two finished lengths?

For a measurement at a particular frequency, ask which loss figure the instrument operator can accept across the complete connection. Use the cable maker's attenuation data for the proposed length and frequency, and include any adapters in the assessment. A short catalog description can confirm the cable family and connector styles without providing all the data for an accuracy-sensitive measurement. Where a known reference assembly is part of the procedure, ask whether its measured performance or calibration record travels with the lead. Keep precision references separate from ordinary bench jumpers. A replacement that works well for a basic signal check may require additional verification before a technician can use it for a result that goes on a customer's report.

Compare parts for your setup

Technical references

• Amphenol RF guide to BNC cable groups and impedance