ˆ14. Install R3, 100K [brown-black-yellow].

ˆ15. If you have completed Steps 4 through 14 correctly, you now have the 4 holes for Q1 surrounded by other parts, making it easy to find! Examine Q1, the dual-gate MOSFET. The schematic diagram shows why it has 4 leads. Insert Q1 so that the square tab is pointing directly at JMP2, but... DO NOT solder Q1's 4 leads until you are satisfied that the tab is oriented as explained, and that the 4 wires are in the respective holes without any twisting. Just as for Q2, keep Q1`s wires as short as possible. Solder all four leads of Q1.

ˆ16. Insert RF gain control R5 into the PC board, make sure it is seated securely. Solder the three pins and the two mounting tabs.

ˆ17. Install C5, .01 µF.

ˆ18. Install C4, the polarized electrolytic capacitor. Electrolytic capacitors have polarity and must be installed properly. 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. Be sure to use the correct polarity.

ˆ19. 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. Solder all six points of the switch.

ˆ20. Install receiver jack J2. Solder all four points of the jack.

ˆ21. 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.

ˆ22. 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.

ˆ23. 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.

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Ramsey Electronics AA7 manual

AA7 specifications

Ramsey Electronics has long been a name synonymous with quality in the realm of amateur radio equipment and communication technologies. Among its standout products is the Ramsey AA7, a high-performance audio amplifier that encapsulates advanced features and specifications aimed at both hobbyists and professionals in need of superior sound amplification.

One of the main features of the AA7 is its robust power output. Capable of delivering up to 7 watts of audio power per channel, it is an ideal choice for driving speakers across various settings, whether in a home audio system, workshop, or small public address system. This level of power ensures that users can experience clear and impactful sound, with performances that fill the room without distortion.

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