This document serves as a service manual for the KENWOOD VFO-5S Variable Frequency Oscillator, TS-515 SSB Transceiver, and PS-515 Power Supply. It provides detailed information on specifications, external and chassis views, block diagrams, troubleshooting, adjustments, packing, PC board and parts lists, schematic diagrams, and color codes for various components.
Function Description
The TS-515 SSB Transceiver is a multi-band amateur radio transceiver designed for Single Sideband (SSB) and Continuous Wave (CW) operation. It allows for communication across several amateur radio bands.
The VFO-5S Variable Frequency Oscillator is an external unit designed to provide stable and accurate frequency control for the TS-515 transceiver. It features both a VFO section for continuous tuning and a crystal oscillator section for fixed frequencies.
The PS-515 Power Supply is a dedicated power supply unit for the TS-515 transceiver, providing the necessary DC and AC voltages for its operation, including high voltage for vacuum tubes and lower voltages for solid-state components. It also incorporates a speaker section.
Important Technical Specifications
TS-515 SSB Transceiver:
- Frequency Range:
- 80 meter band: 3.5 ~ 4.0 MHz
- 40 meter band: 7.0 ~ 7.3 MHz
- 20 meter band: 14.0 ~ 14.35 MHz
- 15 meter band: 21.0 ~ 21.45 MHz
- 10 meter band: A 28.0 ~ 28.5 MHz, B 28.5 ~ 29.1 MHz, C 29.1 ~ 29.7 MHz
- Mode: SSB (A3j), CW (A1)
- Input Power to Final Stage: 180 W (3.5 ~ 21 MHz), 120 W (28 MHz) (when used with PS-515)
- Antenna Impedance: 50 ~ 75 Ω
- Carrier Suppression: Better than 40 dB
- Sideband Suppression: Better than 40 dB
- Microphone Impedance: High impedance type (50 kΩ)
- Transmit Audio Frequency Bandwidth: 400 ~ 2600 Hz (-6 dB)
- Harmonic Radiation: Better than 40 dB
- Sensitivity: 0.5 µV S/N 10 dB (3.5 ~ 21 MHz band), 1.5 µV S/N 10 dB (28 MHz band)
- Image Ratio: More than 50 dB
- IF Interference: More than 50 dB
- Frequency Stability: Within ±2 kHz from one minute after switching on to 60 minutes, and later with 100 Hz per 30 minutes.
- Selectivity: SSB and CW: More than ±1.2 kHz at -6 dB and less than ±2.4 kHz at -60 dB
- AF Output: More than 1 W (10% distortion)
- Receiver Output Impedance: 8 Ω for both speaker and headphone
- Power Consumption: At maximum transmission 350 W, at maximum reception 120 W (when used with PS-515)
- Vacuum Tubes and Transistors: 10 Vacuum tubes, 4 FET, 33 Transistors, 51 Diodes
- Dimensions: 13" wide, 7-9/32" high, 13-5/8" deep
- Weight: 22 lbs.
VFO-5S Variable Frequency Oscillator:
- Frequency Range:
- 80 meter band: 3.5 ~ 4.0 MHz
- 40 meter band: 7.0 ~ 7.3 MHz
- 20 meter band: 14.0 ~ 14.35 MHz
- 15 meter band: 21.0 ~ 21.45 MHz
- 10 meter band: A 28.0 ~ 28.5 MHz, B 28.5 ~ 29.1 MHz, C 29.1 ~ 29.7 MHz
- Oscillation Frequency: 4.9 ~ 5.5 MHz
- Oscillation System: VFO section: Clapp OSC circuit, XTAL OSC: Pierce C-B circuit
- Output Voltage: 1.0 V ±3 dB (with 470 Ω load)
- Main Dial Accuracy: ±2 kHz
- Frequency Stability: Within 100 Hz for 30 minute period three minutes after switching-on (at normal temperature).
- Solid State Components: 6 transistors, 8 diodes
- Power Requirement: 12.6 V AC, 250 mA, 150 V DC, 30 mA
- Size: 7-7/8" wide x 7-9/32" high x 7-9/16" deep
- Weight: 7.5 lbs.
PS-515 Power Supply:
- Output (measured at TS-515 connector in transmit mode, 90W CW output):
- 900 V: 840 V (940 V in receive mode) DC, 230mA (8mA in receive mode)
- 300 V: 290 V (300 V in receive mode) DC, 20mA (8mA in receive mode)
- 190 V: 200 V (220 V in receive mode) DC, 15mA (2mA in receive mode)
- 150 V: 150 V (150 V in receive mode) DC, 45mA (85mA in receive mode)
- -C: -88 V (-88 V in receive mode) DC, 13mA (15mA in receive mode)
- 12.6 V (a): 13.7 V AC, 2.5 A
- 12.6 V (b): 14.2 V AC, 1.5 A
- Speaker Section:
- Diameter: 3-17/32" x 5-1/2" (Ellipsoidal)
- Impedance: 8 ohms
- Frequency response: 150 ~ 5,000 Hz
- Rated input: 1.5 watts (max.)
- Power Requirement: AC 110 ~ 120/220 ~ 240 V, 50/60 Hz, 350 watts (max.)
- Dimensions: 7-7/8" wide x 6-11/16" high x 13-6/8" deep (Excluding feet)
- Weight: 26.4 lbs.
Usage Features
The TS-515 transceiver offers a range of controls for operation, including:
- Knobs: For various adjustments like drive, plate, band selection, VFO, meter, AF gain, microphone gain, and VOX.
- Switches: For mode selection (SSB/CW), AGC/CAL, antenna, and STAND-BY.
- Sockets: For microphone, headphones, and external VFO.
- Meter: Displays various operational parameters.
The VFO-5S provides precise frequency control with:
- Main Dial: For VFO tuning.
- Function Switch: To select VFO or crystal oscillator.
- RIT (Receiver Incremental Tuning) Knob: For fine frequency adjustment.
- Crystal Oscillator Socket: For external crystals.
The PS-515 power supply integrates a speaker for audio output from the transceiver and includes a fuse holder for protection.
Maintenance Features
The manual provides comprehensive instructions for maintenance and adjustment, including:
- Preliminary Operations: How to remove the casing, check parts (crystal, vacuum tubes), connect dummy loads, and set variable resistors and switches.
- Voltage Measurements: Detailed tables for DC and AC voltage measurements at various pin numbers of vacuum tubes and transistor terminals in both transmit and receive modes, crucial for troubleshooting.
- Adjustments:
- Heterodyne Crystal Oscillator: To set the crystal for oscillation.
- BPF (Bandpass Filter): To obtain the required bandwidth.
- IFT and Crystal Filter: To adjust the Intermediate Frequency Transformer and shape the crystal filter waveform.
- S Meter Zero Adjustment: To mechanically set the S meter's pointer to zero.
- Carrier Oscillator: To adjust its frequency and tune the output coil.
- Coil Pack: To complete RF tuning of the antenna.
- 8.6MHz Trap: To improve IF rejection.
- Beat Interference: To minimize interference by adjusting the trap coil and VFO.
- Carrier Balance: To prevent carrier oscillator signal from flowing into the IF stage.
- S Meter Sensitivity: To adjust the S meter to S9 with specified input.
- RIT (Receiver Incremental Tuning): To adjust the transmitting frequency to the center of the RIT knob.
- Marker: To adjust the oscillation frequency of the crystal.
- Base Current Setting: To adjust the base current to the power transistor in the AF unit.
- Final Bias: To set the final base current.
- IFT in BM Stage and Carrier Level: To adjust the IFT and set the CW carrier level.
- RF Meter Sensitivity: To adjust the RF meter sensitivity.
- Neutralization: To stabilize operation of the final stage.
- BM and Carrier Position: To adjust the carrier position by balancing the balanced mixer.
- Side Tone: To set the output level of side tone and check semi-break-in operation.
- VFO-5S Crystal Oscillation: To adjust the ceramic trimmer for oscillation.
- VFO-5S Frequency Matching: To perform frequency tracking of the VFO unit.
- VFO-5S RIT: To adjust the transmitting frequency to the center of the RIT knob.
- General Maintenance: Instructions for removing the case, lubricating gear portions, and replacing pilot lamps.
- Troubleshooting: A detailed table listing symptoms, probable causes, and corrective actions for receiver, transmitter, and power supply issues.
- Parts Lists: Extensive lists of components for each unit, including circuit numbers, part numbers, descriptions, and remarks, covering capacitors, resistors, potentiometers, semiconductors, coils, transformers, and miscellaneous parts.
- Schematic Diagrams: Provided for the TS-515, VFO-5S, and PS-515, offering a visual representation of the circuitry.
- Color Codes: Charts for resistor and mica capacitor color codes, essential for component identification.
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