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RPA-2 HF Modular Receive
Preamplifier
DXE-RPA-2
DXE-RPA-2-INS Rev 0
U.S. Patent No. 7,319,435
© DX Engineering 2017
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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Related Manuals for DX Engineering DXE-RPA-2
Summary of Contents for DX Engineering DXE-RPA-2
- Page 1 RPA-2 HF Modular Receive Preamplifier DXE-RPA-2 DXE-RPA-2-INS Rev 0 U.S. Patent No. 7,319,435 © DX Engineering 2017 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 The RPA-2 is a combination of a redesigned aluminum shielded enclosure chassis with the DXE- RPA-2-PM Receive Preamplifier Plug-in Module factory installed. The DXE-RPA-2-PM module retains the essential characteristics of the milestone product, the original DX Engineering RPA-1. Featuring an internal optional module slot, the RPA-2 allows the use of the optional DXE-IT-PM 75 to 50-ohm Impedance Transformer Plug-in Module or the optional DXE-RG5000HD-PM Receiver Guard Plug-in Module.
- Page 3 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 ...
- Page 4 Noise Figure - The ratio of equivalent noise power developed at the input to that generated by thermal noise in the source resistance, usually expressed in decibels. 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.
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Page 5: Power Connection
and failures. A remote power source of +13.8 Vdc minimum may be used. Alternatively, the RPA- 2 may be powered over the coax. See “Powering Through the Coaxial Cable”. Power Connection The RPA-2 requires a well-filtered +13.8 to +18 Vdc @ 140 mA source with a negative ground. Many inexpensive wall mounted transformer DC supplies are not 'clean' and have RF noise components on their DC output. - Page 6 Alternatively, if the RPA-2 is to be located at the receive antenna, the unit may be powered from DC on the feedline that is connected to the “RECEIVER OUTPUT” connectors. This requires a user supplied bias-tee or feedline voltage inserter used at the operating position, providing the properly filtered and regulated (center- positive) +13.8 Vdc, 140 mA minimum.
- Page 7 Lightning While most amateur radio installations rarely suffer damage from lightning (even though they never disconnect their equipment); the best protection is to disconnect electrical devices during storms. The key to proper lightning survival is proper grounding of feedlines and equipment, and maintaining integrity of shield connections.
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Page 8: Technical Support
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; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or any other work, unless such charges are authorized in advance by DX Engineering.
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