RG316 coax, shown below, is perfect for making up patch leads, building baluns and more. This 50 ohm coax is thin, flexible and will take a considerable amount of power. I’ve also bought a crimping tool. The tool is suitable for SMA plugs plus many more RF connectors.
RG316 Attenuation in dB per 100 feet
| MHz | dB per 100 feet |
| 10 | 2.5 |
| 30 | 4.3 |
| 50 | 5.6 |
| 100 | 8 |
| 400 | 16 |
| 1000 | 26 |
| 1500 | 32 |
| 2000 | 38 |
| 2500 | 42 |
| 3000 | 47 |
I use RG316 patch leads for long, medium and short wave receivers. The loss at these frequencies, as shown by figures above, is negligible when using a couple of feet of this coax.