The VHBB 9124 Balun provides an extraordinary degree of symmetry (common mode rejection), especially at the low frequency end (20 to 40 MHz), where otherwise lack of symmetry with cable braid current may cause severe error.
The Antenna Holder / Balun with cascaded matching baluns is primarily designed for the use with biconical elements such as BBA 9106 or BBAL 9136. It may also be used with rod elements as a dipole with improved bandwidth.
| Connector: | 50 Ω, N |
| Holder length / diameter: | 0.58 m / 22 mm |
| Element fixture: | 10 mm |
| Holder / balun weight: | 0.9 kg |
Frequency Chart: VHBB 9124, 4:1 with different antenna elements
Overview Table: VHBB 9124, 4:1 with different antenna elements
| Antenna Element | Frequency Range [MHz] | Antenna Factor [dB/m] | Isotropic Gain [dBi] | Operation Mode | Pmax [W] | Le [m] | D [m] | Datasheet |
|---|---|---|---|---|---|---|---|---|
| BBA 9106 (biconical) | 30 - 300 | 9…20 | -14…2 | RX | 10 | 1.32 | 0.52 | Datasheet |
| BBAL 9136 (biconical) | 20 - 200 | 5...16 | -16…2 | RX | 10 | 1.94 | 0.57 | Datasheet |
| BBAK 9137 (biconical) | 45 - 450 | 12...26 | -12...2 | RX | 10 | 0.92 | 0.35 | Datasheet |
| BBVK 9138 (biconical) | 60 - 600 | 14...27 | -13...2 | RX | 10 | 0.72 | 0.26 | Datasheet |
| BBFA 9146 (with extenders) | 20 - 110 | 0...13 | -3...2 | RX | 10 | 1.50 - 3.95 | 3.7 - 1 | Datasheet |
| BBFA 9146 (without extenders) | 20 - 220 | 5...19 | -14...2 | RX | 10 | 0.85 - 2.05 | 1.9 - 0.55 | Datasheet |
| FBAB 9177 (open conical) | 30 - 300 | 10…19 | -20…2 | RX | 10 | 1.25 | 0.6 | Datasheet |
| FBAL 9178 (open conical) | 20 - 200 | 6...15 | -16...2 | RX | 10 | - | - | Datasheet |
Dimensions labeled:
- LH: The length of the antenna holder element.
- LE: The length of both conical element and balun (width)
- D: The diameter of the widest part of the conical elements.
