Manual Type: Service Manual Kenwood-2972-Manual-Page-1-Picture
Pages: 16
Size: 1.13 Mbytes (1180585 Bytes)
Language: english
Date: 1977
Quality: Scanned document, reading partly badly, partly not readable.
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MD5: a3d6c78717983260ecd9dcc0f52bf9fa
Downloads: 1005 since 01 January 2012

Several service bulletins


Equipment information

Kenwood TS-820 Transceiver
Model: TS-820
Date: 1977
Category: Radio, Communication
Group: Transceiver
Description: SSB Transceiver

HF all-band SSB/CW/RTTY Transceiver employing PLL system This equipment is a SSB/CW/RTTY Transceiver covering 1.8 to 29.7 MHz frequency bands (WWV; 15 MHz) in which an ideal circuit configuration has been achieved by employing a newly developed PLL technique. Thanks to employment of a FET balanced type mixer in bination of MOS FET and a single conversion system, excellent performance is obtained in both the spurious radiation characteristic and receiving two-signal characteristic. 3. Built-in IF shift circuit The IF shift circuit used, also called a pass-band tuning circuit, shifts the pass-band of intermediate frequency is radio interference, the pass-band can be shifted or the receiving frequency response can be set to a desired band only by manipulating one control knob. 4. Built-in RF processor This Transceiver is provided with a unique speech processor developed by Kenwood. This circuit serves Due to processing at high frequency, the resulting distortion is minimized and deterioration of the tone quality is prevented unlike clippers. RF negative feedback is applied between the final transmitting stage and the driver stage to suppress cross modulation distortion. The good-reputation high-quality, transmission radio waves are improved further by com- 6. Newly developed analogue dial monoscale dial and subdial it is very easy to read frequencies. Since such a circuit that a carrier frequency is kept unchanged regardless of change-over of operation mode is employed, each frequency is accurately indicated only by one dial index. Since die cast is employed for the front panel and the chassis is constructed in the sufficient consideration of strength, the Transceiver maintains high mechanical stability even when installed on a vehicle. The reduction gears of the PLATE and LOAD knobs, the shape and arrangement of knobs designed on the base of Human dial construction easy to read. Unlike conventional transceivers. TS-820 incorporates a monitoring circuit that permits the operator’s speech to be monitored by himself during transmission. 9. Audio frequency response change-over circuit to be used during SSB or CW receiving. During CW receiving, audio frequency band is automatically narrowed to obtain tone quality easy to 10. Built-in fixed channel circuit with RIT (crystal; op- This Transceiver is provided with a fixed channel circuit having RIT. Since cross operation is possible between this circuit and built-in VFO, high technical Operation is This Transceiver permits combination use with Transverter TV-502 (for 2m) only by connector connection. Automatic change-over can also be effected between HF and VHF by using the power switch provided on the Transverter. 12. Built-in AC Power Supply and attachable OC-OC convertar Mobile operation of the Transceiver can be performed by equipping a DC-DC Converter unit (DS-1) available at option. This Transceiver is provided with wide variety built-in accessory circuits such as a noise blanker, VOX circuit, side tone circuit, maker circuit, built-in speaker, AGC 3-position change-over switch, heater switch, IF OUT terminal and connection terminals for a linear Amplifier. 14. Systematized optional equipment Optional equipments are fully provided such as remote VFO VFO-820, external speaker SP-520, CW filter YG-88C, digital display DG-1, Transverter TV-502 microphone MC-50 and low-pass filter LF-30A 15. Use of digital display dial DG-1 (option) 1) Digital display dial The digital dial of TS-820 indicates transmit and receive frequencies using carrier. VFO and local Oscillator signals instead of converting VFO Since the accuracy of frequencies is set up only by read accurately up to 100 Hz order by calibrating the Oscillator with WWV. The green indication on the dial assures many hours