SteppIR DB-42 Monstir Pro 40m-2m Yagi Antenna

Quick Overview

DB42 Monstir Pro is currently the largest of the Dream Beam series of Yagi antennas
Excl. Tax: £6,041.62 Incl. Tax: £7,249.95


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!

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 6.95 – 54 MHz 3.5 – 4 MHz, 5.3 MHz, 6.95 – 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 – 5 elements 5.0 2 5 2.0
6M – with optional passive
element 50.0 – 50.3 MHz
14.0 25 NA NA

Additional Information

manufacturer SteppIR

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