High Performance
Receive Only Broadband
LF, MF and HF Preamplifiers

Features:

• Low noise figure
• High immunity to overload
• Completely shielded
• Suitable for mast/tower mounting
• Small size
• Rugged low profile custom enclosure

P0.01-20/20VD, P0.1-30/20VD, P0.5-30/20VD and P1-30/20VD preamplifiers have been designed for the most demanding amateur, commercial and military applications. Each model has been optimized for the lowest noise figure consistent with excellent strong signal handling capability. These preamplifiers are suitable for use in any receiver or converter/receiver system. Each preamplifier is housed in a rugged low profile custom aluminum enclosure finished with military grade black urethane enamel. Female BNC coaxial fittings are provided for the input and output connections. Other connectors or connector combinations are available. Complete rf shielding is maintained with a feedthrough capacitor for the dc power connection. Mounting holes, suitable for #4 hardware, are located at each corner of the bottom plate.

The P0.1-30/20VD, P0.5-30/20VD and P1-30/20VD broadband preamplifiers use a low noise figure, heavy-duty bipolar transistor in a multiple feedback circuit to obtain essentially flat performance characteristics across the frequency range. A +22 dBm (nearly 200 mW!), 1-dB compression specification means that overload should seldom be a problem even though the preamplifier does not employ a front-end filter. Use of a front-end filter would likely be required only in the most severe interference environments. These preamplifiers would be useful for improving receiver sensitivity throughout the hf range. They would be particularly useful where the receive channel must be split to feed multiple receivers or where specialized receive antennas such as small verticals, DF, loops, Beverage antennas and the like are in use. These specialized receive antennas, although directional and quiet in terms of man-made noise pickup often capture less signal than a full sized dipole antenna.

Extensive testing of these preamplifiers on existing communications systems indicate that a signal-to-noise improvement of 6 - 14 dB can be expected. Each and every preamplifier is precision aligned on our noise figure measuring equipment and should provide long trouble free operation.

These preamplifiers are designed to be powered by a 11 - 16 volt dc source with a current consumption of 40 mA. Low power consumption along with the small size make these preamplifiers ideal for installation within existing equipment or systems, or for remote mounting at the antenna. Mounting the preamplifier at the antenna will provide the best system noise figure although this is less important at hf than it is at the higher frequencies.

Specifications

Model



P0.01-20/20VD
P0.1-30/20VD
P0.5-30/20VD
P1-30/20VD

Freq.
Range
(MHz)

0.01-20
0.1-30
0.5-30
1-30

N.F.
(dB)


2.5
2.5
2.5
2.5

Gain
(dB)


20
20
20
20

1 dB
Comp.
(dBm)

+22
+22
+22
+22

1 dB
Bandwidth
(MHz)

30
40
40
40

Device
Type


Bipolar
Bipolar
Bipolar
Bipolar

Price



129.95
119.95
109.95
109.95

Supply voltage: 11 - 16 Vdc
Supply current: 40 mA
Weight: 2.0 oz.
Dimensions: outline drawing

Prices shown for standard BNC connectors
Add $10 for N, SMA - other types available
For custom frequency ranges see
Special Frequency Ranges or contact factory

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