Johnson - Viking Invader 2000 - Transmitter
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Johnson Viking Invader 2000
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Equipment:
Viking Invader 2000
Date:
1963
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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 .
1 Manual
User manual
Manual type:
User manual
Pages:
69
Size:
5.6 MB
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
March 1, 2014
MD5:
f5a0f8e6-d0e5-c359-6399-1799a115d1ca
Downloads:
970