SB-7 TRANSCEIVER RX BOARD FULLY ASSEMBLED AND TESTED

ASSEMBLED SB-7 RX BOARD:

BACK SIDE VIEW RX-BOARD WITH SURFACE MOUNT COMPONENTS:

Dear all,
           We are happy to announce that our SB-7 Rx Board is fully assembled and tested in our R&D Lab.The performance was really good comparing to previous receivers.The A.G.C circuit and audio filter is doing the job very good. Noise level is less. We heard lot of dx stations in 40 meter. All tests are done with standard HP 8920A RCT and oscilloscope. Signal level feeded and checked from -107dbm to -67dbm. Sensitivity and gain is good.

Regards,
R&D Team.

SB-7 TRANSCEIVER RF AMPLIFIER SCHEMATIC

RF AMPLIFIER SCHEMATIC:

RF AMPLIFIER COMPONENT SIDE LAYOUT:

RF AMPLIFIER SOLDER SIDE LAYOUT:

FUNCTIONAL DIAGRAM:

Dear all,

              I would like to share the RF amplifier schematic of our SB-7 Transceiver project. This is an simple RF amplifier which amplifies the 1 Volt RF to 12 to 15 watts RF Power (PEP). This circuit uses simple transistors & Mosfets. Biasing is made using a 7808 voltage regulator with 10 K POT control. Low pass filter is used in the final stage to eliminate the unwanted signals. The PCB Size is 145 X 73mm.

Regards,
R&D team.