3-1/8” Thurline RF Line Section (Unflanged - Recessed 0.688”)
The Bird 4801-100 is a 3-1/8" Unflanged Recessed 50 Ohm, Line Section designed for insertion between a RF transmitter and antenna or RF load. The is equipped with two sockets for simultaneous measurement of forward and reflected power. Select from a wide variety of Bird Plug-In Elements for the desired power rating and frequency range.
Please note, elements are sold separately.
Bird RF line sections
Bird manufactures 50 Ohm 7/8", 1-5/8", 3-1/8", 4-1/16" and 6-1/8" RF Line Sections. Each line section is equipped with one or two sockets where Plug-In Elements, in the desired power and frequency range, are inserted. Double-socket line sections are for simultaneous measurement of forward and reflected power.
| Part number | Connector type | Line size | Element sockets |
| 4230-006-1 | QC (sold separately) | 7/8" | 1 |
| 4230-018 | N(f) | 7/8" | 1 |
| 4230-057 | N(f) | 7/8" | 1 (with bracket) |
| 4230-059 | QC (sold separately) | 7/8" | 1 (with bracket) |
| 4522A002-5 | QC (sold separately) | 7/8" | 2 (panel mount) |
| 4715-000 | EIA flange | 1-5/8" | 2 |
| 4723-000 | Unflanged (recessed 0.438") | 1-5/8" | 2 |
| 4723-020 | Unflanged (flush) | 1-5/8" | 2 |
| 4610-000 | EIA flange | 3-1/8" | 2 |
| 4801-100 | Unflanged (recessed 0.688") | 3-1/8" | 2 |
| 4802-000 | Unflanged (flush) | 3-1/8" | 2 |
| 4642-010 | Flange (MYAT) | 4-1/16" | 2 |
| 4905-000 | EIA flange | 6-1/8" | 2 |
| 4909-000 | Unflanged (recessed 0.968") | 6-1/8" | 2 |