User manual RAMSEY AA7

[. . . ] · · · · · · · · · · · · Great for perking up scanner reception. Uses Dual Gate MOSFET technology for low noise HF amplification, and a high gain microwave transistor for VHF/UHF. Includes internal telescopic whip antenna plus auxiliary antenna input jack for jazzing up existing antennas. Clear, concise assembly instructions carefully guide you to a finished kit that works FIRST time! [. . . ] Position it so that the plunger of the switch extends over the edge of the PC board. It fits correctly only one way and is on the same side of the board as J1, which you have already installed. Notice that this switch selects which preamplifier circuit will be used. We'll wire the VHF circuit path first, because it's a little easier. The negative side of the capacitor is marked with a black stripe with negative sides. The PC board or the parts layout diagram will show the correctly labeled (+) sign next to the positive hole. Install S2, which controls DC power and also connects the antenna jack, J1, and the receiver jack, J2, directly together when in the turned "off" position. Install the battery snap connector (WITHOUT the battery for now, please). Make sure the positive (red) and negative (black) wires are connected in the correct holes. This PC board follows the accepted standard that the red wire denotes the positive hole (+) and the black wire denotes the negative (-) hole. Install the battery hold-down clamp using a scrap component lead wire placed through the two holes in the clamp and into the PC-board holes. Pull the wire tight and then solder it firmly to the two PC-board points and to the clamp itself (on the top side of the PC board. ) Be sure not to use too much solder on the clamp as it may keep the battery from sitting flat and securely in the clamp. Using the mounting screw supplied, attach the whip antenna to its position on the PC-board. The whip antenna should point up from the component (top) side with the screw inserted through the bottom. Tighten it firmly to ensure a good electrical connection, don't force it so hard that you break it or the PC board and it's delicate traces. You may wish to lightly sand the plating from the screw head and solder it to the PC-Board. AA7 · 11 24. BEFORE connecting battery or conducting any tests, PLEASE recheck each of the preceding steps, looking especially for: · · · · · quality of solder connections correct orientation of Q1 and Q2 correct orientation of the electrolytic C4 correct battery wire polarity correct values for resistors and capacitors INITIAL TESTS No adjustments or alignment is required. See the following section about preparing a reliable and convenient cable for the AA7 and your receiver as well as an optional add-on antenna. Testing the AA7 consists of turning it on, using it and checking that all its described features are operational. You will need to become accustomed to the signal strength in the highest range of the gain control. If you experience any problem, consult the Trouble-Shooting Hints section of this book. USING YOUR AA7 For some of our kits, this "USING. . . . " section becomes the longest part of the book, depending on the possible applications of the kit product. [. . . ] However, customer satisfaction is our goal, so in the event that you do have a problem, take note of the following. DEFECTIVE PARTS: It's always easy to blame a part for a problem in your kit, however, customer satisfaction is our goal, so in the event that you do have a problem, take note of the following. Before you conclude that a part may be bad, thoroughly check your work. Today's semiconductors and passive components have reached incredibly high reliability levels, and its sad to say that our human construction skills have not! [. . . ]