Kenwood TS-520SE Service Manual
Notice
This section details the differences and modifications made from previous models, specifically the 520S, concerning the elimination of DC power function, the X-verter function, and the FIXCH.AVR unit modifications to eliminate the DC-DC converter (-6V). It also notes redesigns for the marker unit and the introduction of the CW NARROW/WIDE switching function.
General Specifications
Frequency Range
- 160 meter band: 1.80 to 2.00 MHz
- 80 meter band: 3.50 to 4.00 MHz
- 40 meter band: 7.00 to 7.30 MHz
- 20 meter band: 14.00 to 14.35 MHz
- 15 meter band: 21.00 to 21.45 MHz
- 10 meter band: 28.00 to 28.50 MHz (A), 28.50 to 29.10 MHz (B), 29.10 to 29.70 MHz (C)
- WWV: 15.0 MHz (receive only)
Mode
SSB (USB, LSB) or CW
Antenna Impedance
50~75 ohms
Frequency Stability
Within 100 Hz during any 30 minute period after warm-up.
Within ±1 kHz during the first hour after 1 minute of warm-up.
Tubes and Semiconductors
| Type | Count |
|---|---|
| Tubes | 3 |
| Transistors | 49 |
| FETs | 19 |
| IC | 1 |
| Diodes | 95 |
Power Requirements
120/220 VAC, or 220/240 VAC, 50/60 Hz operation
- Receive: 45 watts
- Transmit: 280 watts (maximum)
Dimensions
333 (13-1/8" wide x 153 (6.0") high x 335 (13-3/16") deep
Weight
16 kg (35.2 lbs)
Transmitter Specifications
RF Input Power
120/220 VAC, or 220/240 VAC, 50/60 Hz operation
- 200 watts PEP for SSB operation
- 160 watts DC for CW operation
Carrier Suppression
Better than 40 dB
Side Band Suppression
Better than 50 db
Spurious Radiation
Better than 40 dB
Audio Input Sensitivity
60 db (-50 db maximum)
AF Response
400 to 2,600 Hz, within 3 db
Receiver Specifications
Sensitivity
0.25 µV S+/N 10 db or more
Selectivity
| Bandwidth | Specifications |
|---|---|
| SSB (6db) | -2.4 kHz (-6 db) |
| -4.2 kHz (-60 db) | |
| CW (6db) | -0.5 kHz (-6 db) |
| -1.5 kHz (-60 db) |
*(with optional CW filter installed)
Image Ratio
Better than 50 db
IF Rejection
Better than 50 db
AF Output Power
1 Watt (8 ohms load, with less than 10% distortion)
AF Output Impedance
4 to 16 ohms
Parts List and Diagrams
The document includes extensive parts lists detailing components for various units of the TS-520SE, such as the Generator Unit, RF Unit, AF Unit, Mixer Coil Unit, and others. It also contains detailed schematic diagrams illustrating the internal circuitry and connections between these units. These sections are crucial for diagnosis and repair.
