The 4002 is designed specifically for short vehicular whip antennas, and is a rapid, highly efficient, reliable tuner.
The 4002 is optimised to tune a 1.6m whip from 2.5-30MHz with a VSWR typically of 1.5:1 or better.
An optional 800mm riser enables operation from 2 to 30MHz.
The unique tuning algorithm provides a memory-tune location for all frequencies between 2-30MHz.
The memory tuning time of <130mS makes the 4002 the ideal tuner for networks using ALE and/or frequency hopping, with tun-ing times for new frequencies average less than 1 second.
The 4002 is extremely rugged, and meets MIL-STD 810F for
waterproofing (IP68), shock, vibration and dust ingress.
Available antenna bases are shown on Page 3.
Figure 1. Connector end of tuner. From the left, the connectors are earth, RF and control.
Figure 2. HV end of tuner.
Figure 3. Top view of tuner.
Fig 4. Flange mount base
Fig 5. Single hole mount base
Fig 6. NATO Base
The following plots are of VSWR measurements taken of the actual vehicle
installation shown on the front page, using a Codan NGT transceiver.
This is considered the optimum placement for an HF mobile antenna.
Near Vertical Incidence Skywave (NVIS) operation has a general upper limit
of 15MHz, and the NVIS whip package is designed accordingly.
1.6m whip: 2.5-30MHz
2.4m whip: 2-30MHz
Average < 1 second
Unlimited - unique non-linear
15 to 95%, whip-length de-pendant
-40 to +80° C
DC operating range
10 to 16VDC
Open circuit antenna
Short circuit antenna
Shock and vibration
MIL-STD-810F (Dust, vibra-tion, water ingress to IP68)
Case pressure-equalisation device fitted
300mm L x 250m W (including connectors) x 95mm H
RF: N socket
Control: 6 pin bayonet (Mil-spec)
Bespoke diecast aluminium alloy
White or military green
Flange mount base Standard package
Single hole mount base Standard package
NVIS option for Flange mount/Single hole Standard pack-ages
Flange mount base Extended package
Single hole mount base Extended package
NVIS option for Flange mount/Single hole mount Ex-tended packages
1.55m fibreglass whip option for both Extended pack-ages, replacing the supplied stainless steel whip
Side-mount bracket option for all packages
N Plug to UHF Socket Adapter
Standard packages include the 4002, base, spring, stainless steel whip, RF and control cables.
Extended packages add an 800mm riser to extend the lower frequency range.