Price: $9,985.00
SteppIR DB42 MonstIR Pro Yagi
The DB42 Monstir Pro is currently the largest of the Dream Beam series of Yagi antennas, with 5 elements on 20m-6m and 3 elements on 40/30. For those who aspire to the pinnacle of performance, the DB42 provides coverage from 80m through 6m (with optional 80m dipole kit). The DB42 has a 49 ft looped driven element. This patented design allows us to make the end loop elements only 39 feet long, yet the performance is as if all 3 of the loop elements are 49 feet long. The folded dipole loop technology lets the footprint be 40% less than that of a full size yagi, losing only 0.4dB in gain performance.
The DB42 has a optional 80M dipole that works with the SDA100 controller for effortless tuning throughout the entire 80M band. The dipole runs parallel to the boom and uses the end elements as capacity hats, creating zero interaction with the rest of the antenna.
The 6m passive element option for the DB42 adds 3x fixed elements to the antenna, for a total of 8 elements on 6m. With no interaction or wind load added to the antenna, this option creates a 6m Yagi with 14.0 dBi of gain and 25 dB of front to rear!
ITEMS
Image (click for detail) |
Part Number |
Description |
Price |
 |
00442 | DB36 40m-6m: DB42 Yagi antenna, includes 2x 39 ft loop elements, 1x 49 ft element, 2x 36 ft straight element, 42 ft boom, 238 lb, 6.9Mhz – 54Mhz continuous frequency coverage; includes basic SDA100 electronic controller, DB25 dsub Field Splice, connector junction box and Astron LS3 power supply with cable. Optional 80m dipole available. | $9985.00 |
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09128 | SDA100 Controller: Standard for all antenna models; Basic controller includes: 180 degree mode, bi-directional mode, auto-retract, manual band change, manual adjustment of elements. | $0.00 |
 |
03650 | DB25 dsub Field Splice: The db25 field splice is used to connect the control cable to the SDA 100 electronic controller. The field splice consists of 3 terminal headers that are mounted to a PCB board, which is in turn connected to a male DB25 connector. The control cable is connected to the splice using the included wiring diagram. Having the field splice allows for exact lengths of control cable, with lengths available to the nearest foot. In addition, if the cable is being run into a conduit, it eliminates the need to cut off the connector. | $0.00 |
|
01502 | Connector Junction Box: Standard on the DB42 Yagi, the connector junction box is a hinged enclosure that has female terminal headers mounted inside. The control cable and EHU cables are then connected to a male terminal plug, creating a pluggable/unpluggable connection for the antenna wiring. The connector junction box also includes a 25 pin female dsub mounted inside, for testing the antenna at the point of installation. | $0.00 |
|
|
Astron LS3 Power Supply | $0.00 |
Specifications
Specification |
DB42 |
DB42 with 80m Dipole Option |
| Boom Length |
42.5 feet / 13.0 m |
same |
| Boom |
1.75 to 3 inch/4.45-7.6 cm (tapered) |
same |
| Longest Element |
49 feet / 14.9 m |
same |
| Turning Radius |
29 feet / 8.8 m |
same |
| Weight |
238 Lb / 108 Kg |
242 Lb / 109 Kg |
| Wind Load |
19.9 ft^2/ 1.85 sq. m |
same |
| Wind rating |
100 mph |
same |
| Adjustable elements |
5 |
same |
| Power Rating |
3 KW continuous |
80m – 1.5KW; otherwise 3KW |
| Feed points |
3 |
same |
| Frequency coverage |
6.8 – 54 MHz |
3.5 – 54 MHz |
| Tuning Rate |
1.3 ft/sec |
same |
| Control Cable |
25 conductor 22 gauge |
25 conductor 22 gauge |
Performance for Ham Bands |
DB42 Forward Dir Gain DBi |
DB42 Forward Dir Front to Rear, DB |
DB42 Reverse Dir Gain DBi |
DB42 Reverse Dir Front to Rear, DB |
| 80M (option) |
1.7 |
n/a |
1.7 |
NA |
| 40M |
8.0 |
25.5 |
8.0 |
23.2 |
| 30M |
9.0 |
12.4 |
9.0 |
12.3 |
| 20M |
10.1 |
22.0 |
10.0 |
23.2 |
| 17M |
10.8 |
22.2 |
10.7 |
21.9 |
| 15M |
11.0 |
25.7 |
10.6 |
20.0 |
| 12M |
11.9 |
24.1 |
10.4 |
8.9 |
| 10M |
12.2 |
20.0 |
10.5 |
11.7 |
| 6M – 4 elements |
5.0 |
2 |
5 |
2.0 |
| 6M – with optional passive element 50.0 – 53.3 MHz |
14.0 |
25 |
NA |
NA |
Options
Image (click for detail) |
Part Number |
Description |
Price |
stock photo |
03222 | OPTIONAL Control Cable: 12 wire 22 AWG shielded control cable, outdoor rated, NON-buriable. Available in 1m increments. Lengths over 65m require the 33v power supply or the remote driver board option. | $7.45 |
 |
01321 | OPTIONAL Transceiver Interface for SDA100 controller: Automatically adjusts each element of the antenna as the radio tunes. Requires a transceiver interface cable. | $155.00 |
 |
01322 | OPTIONAL Tuning Relay for SDA100 controller: Lock-out relay connects via PTT cable to RF power source and prevents the amplfier from transmitting while the SteppIR antenna is being tuned. Helps prevent potential mismatch issues that could damage the antenna. | $155.00 |
 |
09130 | OPTIONAL Advanced Lightning Protection (ALP) Module for SDA 100 electronic controller: Each driver chip has a relay in front of it that protects against lightning, nearby lightning incident and dead shorts. Module will only work if the antenna is not in the process of adjusting when the event occurs. | $255.00 |
 |
09132 | OPTIONAL Remote Driver Board for SDA 100 electronic controller: The remote driver board is mounted near the tower base. 12 conductor control cable is run from antenna to the remote driver board, and then CAT5e cable can be used to connect from remote driver board to hamshack, up to 2000 feet away. Requires a power source. Advanced lightning protection (ALP) module is included with this option. Remote driver board comes with an aluminum mounting plate but does not come with an enclosure. | $380.00 |
 |
01811 | OPTIONAL 80m Dipole kit: This option adds a wire dipole that runs parallel to the boom, using the end loop elements for capacity hats. Performance is only 0.8dB down in gain from a full sized 80m dipole and there is zero interaction with antenna and no wind load added. | $995.00 |
 |
01603 | OPTIONAL Element truss kit, end elements: Element trusses for loop element. Because the loop elements droop lower than the non-loop elements, this option allows a more uniform appearance of all the elements. Does not improve wind or ice load limits. For appearance only. There are two sets of trusses for this kit. | $335.00 |
 |
06009 | OPTIONAL 6m Passive Element Kit: The standard antenna has 6m capability but the spacing is not optimal. Adding two aluminium fixed length passive elements create a nicely spaced 6 el yagi on 6m band (50.000-50.300 MHz). Improves performance to 14.0 dBi gain / 25dB front-to-rear. Because this is a fixed element, the performance effect is only good from 50.0MHz to 50.300MHz. A must for anyone using 6m! | $445.00 |
 |
06116 | OPTIONAL Voltage Suppressor: Line filter (16 conductor) for filtering ESD and other unwanted voltages from the Control cable. Made by Array Solutions. A better option would be the 09130 Advanced Lightning Protection (ALP) module, which internally protects the SDA 100 controller by relaying out the driver chips in case of a lightning strike, near incident event or a dead short. | $155.00 |
 |
OPTIONAL Transceiver Interface Cable - Kenwood: Connects your transceiver to the SDA 100 controller for automatic adjustment of antenna when you change frequencies (requires 01321 transceiver interface). Kenwood takes either the S15 or S18 cable. | $45.00 | |
 |
OPTIONAL Transceiver Interface Cable - Yaesu: Connects your transceiver to the SDA 100 controller for automatic adjustment of antenna when you change frequencies (requires 01321 transceiver interface). Yaesu uses either the S12, S13, S18 or S19 cable. | $45.00 | |
 |
OPTIONAL Transceiver Interface Cable - Icom: Connects your transceiver to the SDA 100 controller for automatic adjustment of antenna when you change frequencies (requires 01321 transceiver interface). ALL cables are the same for Icom. | $45.00 | |
 |
OPTIONAL Transceiver Interface Cable - OTHER MODELS: Connects your transceiver to the SDA 100 controller for automatic adjustment of antenna when you change frequencies (requires 01321 transceiver interface). Cable types for these radios vary. | $45.00 | |
 |
02114 | OPTIONAL Y Connector for SDA 100 Transceiver Interface: ''Y'' cable is used to connect a computer logging program, transceiver and the SDA 100 to one singular communication port; the Y cable is not necessary with Icom radios. | $65.00 |