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Summary of Contents for DX Engineering RPA-1 HF
- Page 1 RPA-1 HF Preamplifier DXE-RPA-1 DXE-RPA-1-INS Rev 4a U.S. Patent No. 7,319,435 © DX Engineering 2012 P.O. Box 1491 ∙ Akron, OH 44309-1491 Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200 Fax: (330) 572-3279 ∙ E-mail: DXEngineering@DXEngineering.com - 1 -...
- Page 2 Additional Requirements Please note you will need to consider the following requirements (parts not included in this package) to install and operate the DXE-RPA-1 HF Preamplifier: The DXE-RPA-1 requires a well-filtered, negative ground, 12-18 Vdc @130 mA power source. Depending on the supply current, you might also need an inline fuse. Powering the DXE-RPA-1 through the coax feedline requires a voltage injector circuit (not included) and an internal connection change.
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Page 3: Specifications
Pennants, Flags or K9AY Loops require a preamplifier at the antenna. If you are mounting the unit outdoors, you will also need a non-corrosive, silicon-based RTV sealant, such as DX Engineering RTV598335. Sealants that contain acetic acid are corrosive to aluminum and should be avoided. - Page 4 Installation Mounting Optimum electrical location of the DXE-RPA-1 varies with antenna system background noise level. A good receiving system requires the antenna to establish system noise, rather than amplifying devices. One common myth is that preamplifiers must be mounted at or near antennas to be effective.
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Page 5: Connecting The Power Supply
3. Replace the antennas with a resistor load of the same impedance as the antennas. 4. When the load is substituted for the antenna, a noticeable decrease in noise should occur. It is advantageous to have receiver AGC action begin just above noise floor, while avoiding excessive levels of background noise. - Page 6 DXE-F6 - 75 ohm F-6 Style, Direct Bury Coaxial Cable - Full Spool or Custom Cable Assemblies DX Engineering recommends using a high quality 75 Ω “flooded” F6 type coaxial cable. Flooded style cables have the distinct advantage of automatically sealing small accidental cuts or lacerations of the jacket. Flooding also prevents shield contamination and can be direct-buried.
- Page 7 Guess what? It's not the rain that corroded it - It's the RTV! Normal RTV gives off acetic acid when it cures. That's the vinegar smell. The acetic acid causes the corrosion. DX Engineering has located a Neutral Cure RTV made right here in Ohio that is non-corrosive and is safe for sealing those baluns and other electronic gear that are going to be out in the weather.
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Page 8: Technical Support
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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