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RPA-2 HF Modular Receive
Preamplifier
DXE-RPA-2
DXE-RPA-2-INS Rev 2a
U.S. Patent No. 7,319,435
© DX Engineering 2019
1200 Southeast Ave. - Tallmadge, OH 44278 USA
Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200
Fax: (330) 572-3279 ∙ E-mail: DXEngineering@DXEngineering.com
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Summary of Contents for DX Engineering RPA-2
- Page 1 RPA-2 HF Modular Receive Preamplifier DXE-RPA-2 DXE-RPA-2-INS Rev 2a U.S. Patent No. 7,319,435 © DX Engineering 2019 1200 Southeast Ave. - Tallmadge, OH 44278 USA Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200 Fax: (330) 572-3279 ∙ E-mail: DXEngineering@DXEngineering.com...
- Page 2 RPA-2 A simple internal jumper allows the RPA-2 to be powered by DC on the feedline for use on antenna types that require a preamplifier at the antenna such as Pennants, Flags or K9AY Loops...
- Page 3 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.
- Page 4 If it were possible, a perfect amplifier would have a noise figure of 0 dB. The RPA-2 is extremely quiet, and does not contribute noticeable noise to receiving systems. Almost all HF antenna systems receive an ambient noise level that is greater than the noise floor of the RPA-2.
- Page 5 +13.8 to +18 Vdc, negative ground, the power plug center is connected to positive and has an inline 1A fuse. When power is applied to the RPA-2, the green LED will illuminate. A standard 2.1 mm power connector with center positive and +13.8 Vdc supply may be used.
- Page 6 Conversely, adding a conventional inline attenuator on the input of the RPA-2 will reduce its noise figure roughly by the amount of the attenuation. This is usually not a problem with modest antenna efficiency. With a decrease in noise figure the input intercept and overload limit increase.
- Page 7 With the RPA-2 opened, use a round screwdriver to gently pry the bypass module as shown below. Do one side at a time and the module will come out. When installing the chosen optional module, align the pins and press both ends of the module equally until the chosen option module is fully seated.
- Page 8 Warranty All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. DX Engineering’s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted;...
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