Additional Requirements; Specifications Of The Dxe-Rpa-2 Receive Preamplifier - DX Engineering RPA-2 Manual

Additional Requirements

Please note you will need to consider the following requirements (parts not included in this
package) to install and operate the RPA-2 HF Preamplifier:
The RPA-2 requires a well-filtered, negative ground, +13.8 to +18 Vdc @140 mA power source.
Depending on the supply current, you should use an inline fuse. Alternatively, powering the RPA-2
through the coax feedline requires a voltage injector circuit (not included) and an internal jumper
(HD5) change. See the section "Powering Through the Coaxial Cable".
Installation outdoors at the antenna is not normally needed or recommended. However, some antenna
types such as Pennants, Flags or K9AY Loops require a preamplifier at the antenna. If you are
mounting the unit outdoors, you will also need to mount the RPA-2 in such a manner as to prevent
moisture entering the unit.

Specifications of the DXE-RPA-2 Receive Preamplifier:

 Input and Output Connectors, female: BNC and F
 Frequency Range: 300 kHz to 35 MHz
 Gain: 16 dB, +/- 1.5 dB (over entire frequency range)
 Output Third Order Intercept: 43 dBm
 Noise Figure: 3.5 dB
 One dB Compression Point: +26 dBm (400 mW output)
 Dynamic Range, IM3: 110 dB or greater (500 kHz BW)
 Power Requirement: +13.8 to +18 Vdc, 140 mA max.
 Operating Temperature Range: -10°F (-23°C) to 150°F (65°C), non-condensing
The following are simplified explanations of information highlighted above.
Third Order Intercept
standard measure of how well a
receiving system performs in
the presence of strong nearby
signals. The higher the third
order intercept (TOI), the less
likely adjacent strong signals
will cause interference. The
RPA-2 offers substantially
improved TOI over competitive
preamplifiers and
communication receivers. The
figure to the right illustrates a
typical RPA-2 output third
order intercept measurement.
The RPA-2 is significantly more immune to overload than the best commercial amateur
receivers. Third order products are 50 dB below +18 dBm output.
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