|Johnson Viking 240-305-2 Other|
The SSB Adapter is a filter type SSB generator capable of operating on all amateur band SSB frequencies between 3,8 to 29.7 megacycles with an approximate output of 2 watts. The equipment is designed for use with the Valiant I and II utilizing the Valiant's VFO for frequency control and last two stages for power amplification. All the Adapter R. F. stages are bandswitched and pretuned except for the amplifier tank circuit. The 1st and 2nd mixer stages utilize the 7360 tube capable of long term stability and suppression of at least 40 db. The 7360 tube is also used as a combined crystal oscillator and balanced modulator providing a high degree of stable carrier suppression. The crystal filter is the same as used in the Viking Invader transmitters with the same stable operation and sharp response. The output stage consists of a "Pi” network with a fixed 50 ohm output impedance. The audio system includes a fixed audio oscillator for use during tuning adjustments. The two stage audio amplifier has an excellent response and is designed for use with a high impedance microphone. The control circuits provide for MANUAL, VOX and P.T.T. operation of the Adapter and the Valiant transmitters. The filament and plate voltages to operate the Adapter are provided by a separate power supply. All the cables necessary to connect the Adapter to the power supply and to the Valiant transmitter are furnished with the Adapter.
These manuals are available for the above equipment:
|Johnson -- Viking 240-305-2 --|
|Size||800.40 Kbytes (819613 Bytes)|
|Quality||Scanned document, reading partly badly, partly not readable.|
|Upload date||01 March 2014|
|Downloads||181 since 01 March 2014|
A. DESCRIPTION AND SPECIFICATIONS 1 1. Electrical Description 1 2. Mechanical Description 1 3. Specifications 1 B. FUNCTIONAL DESCRIPTION OF SYSTEM 2 C. UNPACKING AND INSPECTION 2 D. INSTALLATION 2 1. Adapter with the Valiant 2 2. Adapter with other units 5 E. FUNCTION AND LOCATION OF CONTROLS AND METER 6 1. Front panel 6 2. Rear of chassis 6 F. OPERATION 6 1. SSB Operation (MANUAL) 6 2. SSB Operation (P.T_T.) 7 3. SSB Operation (VOX) 7 4. AM and CW Operation 10 G. ALIGNMENT PROCEDURE 10 1. Sideband generator 11 2. Multiplier stage 12 3. Mixer stages 12 4. First mixer balance 13 5. Harmonic stage 14 6. Reneutralization of final amplifier 14 TABLES 1. Adapter Resistance Measurements 2. Adapter D.C. Voltage Measurements 3. Adapter R.F. and Audio Voltage Measurements PARTS LISTS SSB Adapter 18-21 Power Supply 21
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