>>> Oscillator & Amplifier Power Supply <<<
Shown in figures 1, 3, 5 is the circuit diagram of the B, H, L version of the DCAPS12 power supply that provides 12 VDC power for up to 3 VHF/UHF Amplifiers and 1 VHF/UHF Oscillator simultaneously. Also provided by the DCAPS12 is a tuning voltage output (V-T) for frequency control of the VCO2C, VCO1K, and VCO2K voltage controlled oscillators. The tables shown next give information on the V-T output for all 3 power supply versions and the resulting change in frequency for a 1 turn adjustment of R1.
| Model Number | V-T Min. | V-T Max. | Volts / Turn |
| DCAPS12B | 0 | 18 | 0.90 |
| DCAPS12L | 0 | 9 | 0.45 |
| DCAPS12H | 9 | 18 | 0.45 |
Table 1, V-T Output
===
| VCO P/N | DCAPS12B | DCAP12L | DCAPS12H |
| VCO1K | 37.4 | 18.7 | 18.7 |
| VCO2K | 64.9 | 32.45 | 32.45 |
Table 2, Change in frequency (MHz) for 1 turn adjustment of R1
===
Figure 1, DCAPS12B Circuit Diagram
===
Figure 2, DCAPS12B Printed Circuit Board Assembly
FOR ONLINE ORDERING, A U.S. SHIP TO ADDRESS IS REQUIRED. INTERNATIONAL ORDERING INFORMATION IS AVAILABLE BY CLICKING ON THIS HYPERLINK, INTERNATIONAL.
===
Figure 3, DCAPS12H Circuit Diagram
===
Figure 4, DCAPS12H Printed Circuit Board Assembly
FOR ONLINE ORDERING, A U.S. SHIP TO ADDRESS IS REQUIRED. INTERNATIONAL ORDERING INFORMATION IS AVAILABLE BY CLICKING ON THIS HYPERLINK, INTERNATIONAL.
===
Figure 5, DCAPS12L Circuit Diagram
===
Figure 6, DCAPS12L Printed Circuit Board Assembly
FOR ONLINE ORDERING, A U.S. SHIP TO ADDRESS IS REQUIRED. INTERNATIONAL ORDERING INFORMATION IS AVAILABLE BY CLICKING ON THIS HYPERLINK, INTERNATIONAL.
===