1.1 MHz to 1.9 MHz M.O.P.A. (Master Oscillator Power Amplifier)
1930s/1950s M.O.P.A. Oscillator Replica. When connected to the GB-4000
it is capable of outputting 8 Frequencies Simultaneously.
The M.O.P.A. amplifier uses the broadcast method of outputting frequencies. Many people ask what are the
benefits of the M.O.P.A. over the SR-4 amplifier. First: the M.O.P.A. uses the plasma tube broadcast method
which is a non-contact method. The broadcast method allows for a greater power output of 90 watts compared
to the SR-4's 10 watt contact method. Second: the M.O.P.A., for the first time since the 1930s, allows for the use
of high frequencies directly output through the non-contact plasma tube method. This has been a long sought
after feature that many have been asking for. If you are wanting to use the more powerful, versatile 1930s/1950s
non-contact method, then the M.O.P.A. amplifier is the instrument you will want to own.
When it comes to power the GB-4000, SR-4 and M.O.P.A. should be considered as good, better and best. If
your
budget only allows for the GB-4000 then you have the best frequency generator you can purchase. If your
buget
allows for the GB-4000 and SR-4 amplifier then you move up to the next level of performance. If you can afford
the GB-4000 and M.O.P.A. amplifier then you know you have the very best system on the market today which has
both contact and non-contact capabilities. You also have the only system that can output the 1930s/1950s
frequencies. Only purchase what you can afford because you can always add the SR-4 or M.O.P.A. amplifier at a
later date.
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The M.O.P.A. Amplifier/Oscillator Technical Specifications and Features........
- Fabrication: Built by hand and tested for quality assurance with one year warranty.
- Proven design: Solid state combined with vacuum tube technology used for over 80 years.
- Amplification method: Original vacuum tube amplification.
- Amplification voltage: High voltage (1128 volts).
- Amplification current : Low current (30 to 140 milliamps).
- Vacuum tube vs Solid state amplification: Modern solid state uses low voltage and
high current designs. The M.O.P.A. uses the high voltage low current design.
- Milliamp meter: Built in.
- Waveform: Sine wave.
- Sine wave: Analog.
- Carrier frequency: Variable.
- Carrier frequency range: Approximately 1.1 MHz to about 1.9 MHz.
- Carrier frequency tuning: Variable tuning capacitor.
- Power output: Variable average un-modulated power with a maximum of approximately 90 watts
at 140 milliamps.
- Peak power: When gated or modulated, approximately 360 watts on the high potential voltage rise on
the leading edge of the square wave waveform.
- Frequency input method: Designed to work exclusively with the GB-4000 frequency generator
through banana jacks or a BNC connection.
- Frequency output modulation: GB-4000 audio frequencies up to 40,000 hertz square wave
@ 100% AM modulation.
- Maximum frequencies output: When connected to the GB4000 it can transmit up to 8
frequencies simultaneously.
- Gating or pulsing: 1 to 40,000 hertz using the GB-4000.
- Frequency delivery: Metal or plasma tube antenna (Sold by another company).
- Tube ignition: Instantaneous.
- SWR meter: None. Plasma tube is connected directly to the RF tank coil requiring no SWR
(standing wave ratio) meter. This method, unlike the SWR meter systems, delivers almost 100%
power output to and through the plasma tube.
- Broadcast range: 1700 feet with useful range of about 30 feet when using plasma tube. Due to the laws
of physics there are limitations to plasma tubes and metal antennas that need to be understood. Both
are very efficient and about 100% of the energy that you put into them comes out. But for every foot
that you move away from these antennas you lose 75% of the power they output. To illustrate we will
use the standard loss with metal antennas as the power loss ratio for a plasma tube. With a 50 watt
output at one foot away from the plasma tube you will only get 12.5 watts. At two feet away you only
have 3.125 watts and at 3 feet you only have about 0.78 of a watt. Because of the law of physics it
is important to be as close to the plasma tube as you can get if you want the greatest amount of
the energy that comes out of it. Three to six feet distance away from the plasma tube would not be
the best choice.
- Suggested range: 1 inch to 5 feet when using plasma tube. Because there is no 1 foot to 3 foot null
zone (non-effective range) it is not necessary to stay 3 to 6 feet away from the plasma tube because
it outputs the same as the 1930s/1950s equipment that was used within 6 inches of the target area.
- Size: Compact design - 10.5" Wide X 17" Long X 10" High.
- Power used: 110/120 volts AC.
- Power usage: 150 watts. When connected to the GB-4000 175 watts.
- Weight: 19 pounds.
- (Please note: plasma tube including copper collars with wire and plasma tube holder sold separately
from another company for $260.00 plus shipping. Your distributor can give you the phone number
for that company so you can order it when you order your M.O.P.A. This plasma tube is made of
Pyrex and is a 2" inch round by 14" inch long Helium, Argon or Helium/Argon filled tube. It is
guaranteed to handle the power output of the M.O.P.A.)
- For those who already own a GB-4000, the M.O.P.A. is priced at $2595.00. This price includes shipping
in the USA.
- The M.O.P.A. with GB-4000 is priced at $4305.00 and includes shipping in the USA.
All products sold by AAA Production come with a one year parts and labor warranty and free
technical support for as long as you own your instruments. See your distributor to purchase
a GB-4000, SR-4 amplifier or a M.O.P.A. amplifier/oscillator.
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Plasma Tube Comparison Chart
Features
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GB4000 & M.O.P.A. with Plasma tube
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Perl & ProGen with Plasma Tube |
EMEM F-117 with Plasma Tube |
*EM
type devices with Plasma Tube |
BCX
Ultra with Plasma Tubes |
Beam
Ray with Plasma Tube |
BCX 211 411
with Plasma Tubes |
EMX
with Plasma Tube |
IR/BPT
500 with Plasma Tube |
Capable of modulating frequencies
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RF Carrier Frequency
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GB4000 2.4 MHz carrier with 20 millon also output directly M.O.P.A. Variable 1.1 MHz to 1.9 MHz |
Fixed 27.12
MHz |
*EM
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*EM
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No RF *EM 45,000 hertz for plasma tubes
3 Fixed RF carriers for electrodes 1 MHz 1.25 MHz 1.67 MHz |
*EM |
Possibly 200 Thousand hertz |
All 20 million output directly |
27.12 MHz |
Outputs simultaneous audio frequencies
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8
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3 Only with additional generators |
2 |
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Single audio frequency output |
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Can produce
side bands |
16 |
6
Only with additional generators |
4
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2 |
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Frequency range in hertz
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20 Million
Only from GB4000 |
1 Million Only from ProGen |
10,000 |
10,000
to 14,000 |
100,000
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10,000
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40,000
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20 Million |
500,000 |
Analog frequencies
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50% duty cycle
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10 - 90% duty cycle
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Square Wave
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Sine Wave |
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RF Power level (approximate)
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90 watts average power 360 watts peak power |
60 watts |
No RF |
No RF
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No RF for Ray tube. Electrodes 0.20 watts |
No RF |
18 watts |
0.10 watts |
50 to 360 watts |
Programmable auto channels
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Depends on generator used
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Gating features
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Frequency sweeps
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Converge sweeps
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Displays actual frequencies
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Outputs 1920s
Frequencies |
Direct and through Plasma Harmonic |
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Some |
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Outputs 1930s
Frequencies |
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Outputs 1940s
Frequencies |
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Some
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Some
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Some
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Outputs 1950s
Frequencies |
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(*EM) Any plasma tube instruments that are EM (electro-magnetic) do not use RF (radio frequency)
frequencies or an RF carrier frequency. They use coils to produce a high electromagnetic field to carry
the frequencies to the target. They are limited to about 10,000 hertz but a few go to 30,000 hertz. Due to the
fact that many manufacturers use similar designs and use an EM field to deliver the frequencies, we
have included them in the chart as "EM devices with Plasma tubes." Since they do not use an RF
carrier frequency it is almost impossible to determine their power output. Almost none of these
maufacturers list the power output of their equipment. For this reason we list in the "Power level" field
No RF so that the reader knows that they do not us an RF carrier frequency or output any RF
frequencies. They will have names such as Light Wave Blaster, EMEM, Beam Ray, Plasma Plus II,
F-117, EMEM2, EMEM3D, EMEM3DV, EMEM5's EM7V and System 8CE EM+. They generally are very
good instruments and work well. The only limits, except for the EMX, are the frequency range. They only
output low audio frequencies. The EMX goes up to 20 million hertz but only has the power output of one
tenth of one watt. All the original 1920s through the 1950s instruments used RF and had an average
power output from 25 to about 50 watts.
GB4000 with M.O.P.A. Amplifier
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M.O.P.A. Vacuum tube amplifier.
90 watts output.
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We recommend the purchase of an Elenco F-2800 Frequency Counter to properly read your
M.O.P.A. Frequency Amplifier. Image shown below.
Since the new M.O.P.A. Oscillator/Amplifier uses an old style variable tuning capacitor, it is necessary to have a frequency counter so you can set the instrument to whatever frequency you want to use from 1.1 MHz to 1.9 MHz. Please note: The Frequency counter is not supplied with the purchase of the M.O.P.A. Amplifier. For those who want to have the frequency counter it can be purchased for about $99.00 from: |
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