Equipment information:

Johnson Viking Invader 2000 Transmitter
Manufacturer:
Johnson
Model: Viking Invader 2000
Date: 1963
Category: Radio, Communication
Group: Transmitter
Description:
Information:
                                    The Invader 2000 is a filter type transmitter capable of
SSB, AM, and CW operation on all amateur bands between 3,5
and 30 megacycles The equipment is designed for maximum
power inputs of 2000 watts PEP in AB2 linear SSB, 800 watts
in linear AM and 1000 watts in CW operation. The exciter may
be operated alone with power inputs of 200 watts PEP in SSB,
90 watts in AM and 200 watts in CW.

The exciter utilizes a highly stable crystal filter with an
unusually sharp response for excellent carrier and unwanted
sideband suppression, RF controlled ALC and audio AGC
circuits provide greater speech power and provision is made
for plugging a phone patch directly into the audio input.
Mixer type keying rs used for shaped characters free from
clicks and chirps. The exciter output circuit is a wide
range Pi network for loading into an antenna and also
provides integral fixed loading for loading into the high
power amplifier grid.

The high power amplifier employs two parallel PL175A tubes
with a 200 ohm resistive grid circuit and a wide range Pi
network output circuit The resistive grid eliminates a tuned
grid circuit and neutralization and loads the exciter for
proper operation, TVI suppression, spurious filtering,
parasitic oscillation suppression and rigorous shielding are
designed into the equipment..

The Invader 2000 power supply furnishes all plate, screen
and bias voltage requirements. The exciter bias and screen
voltage are tube regulated as is the amplifier bias on SSB
and AM. The amplifier screen voltage is dynamically
regulated by the transformer design, large bleeder current
and large filter capacity. Both the exciter and amplifier
high voltage supplies have swinging choke input and large
filter capacitors for improved regulation. The power supply
is wired for 230 VAC input power although it may be
converted for a 115 VAC source .

These manuals are available for the above equipment:

Johnson -- Viking Invader 2000 -- User Manual
File name: Johnson-5495-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 69
Size: 5.65 Mbytes (5919860 Bytes)
Language: english
Revision:
Manual-ID/Number:
Date: 1963
Quality: Scanned document, all readable.
Upload date:
MD5: f5a0f8e6d0e5c35963991799a115d1ca
ed2kID: e2068fa2d122002625d76a9b0b34b74f
Downloads: 146 since 01 March 2014
Information:
A,	DESCRIPTION AND SPECIFICATIONS

1.	Electrical Description	1

2.	Mechanical Description	1

3.	Specifications	1

4.	Invader Block Diagram
B.	INSTALLATION

1.	Unpacking and Inspection
1.	CW Operation
3

3
2 , Transportation and Missing Parts Claims	3

3,	Tube and Exhaust Fan Installation	3

4,	Power Cable	3

5,	Cables and Ground Connection	4

6,	Screen Voltage and Transformer Tap Adjustment	8

C.	METER, CONTROL, FUSE AND INDICATOR LOCATION AND FUNCTION	9

D„ OPERATING PROCEDURES	U
11
2.	SSB and AM Operation	11

3.	Zeroing	11

E. ADJUSTMENT AND OPERATION	H

1.	CW Operation	12

2.	Linear Operation Loading Current	12

3.	AM Linear Operation	13

4.	SSB Linear Operation	14

5.	VOX-PTT, AT, ZERO, and MAN Adjustments	15 6 ,	Lower
Power Operation	16

F0 ALIGNMENT AND MAINTENANCE	17

G. CONVERSION FROM 230 TO 115 VAC	24
Johnson-5495-Manual-Page-1-Picture
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