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Discontinued Product, replaced by
the Spitfire...
Transmitter |
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Q. What do you
get if you take a Gizmo
(generally accepted as having one of the best Frequency Synthesizers
and Modulators of any Part 15 compliant AM transmitter
available) and add:
- Active Stereo Mixer
- Active Treble and Bass Audio Filters
- Audio Compressor (using SSM2166 IC)
- Audio Limiter (using SSM2166 IC)
- Noise Gate
- Marker Tone Generator (High and Low Tones)
- Two Voltage Regulators
- Four RF Filters
- Professional ATU (Antenna Tuning Unit)
with Variable Capacitor
- Built in RF tuning meter (LED bar graph))
- Built in Audio level and Modulation
monitor (LED bar graph)
- New Audio and RF Connectors
- Blow-out proof RF Stage
- External Ground Connections
- External Controls for Gain, Compression
and Modulation
- Internal Controls for Sensitivity,
Treble, Bass, Noise Gate, Limiter Threshold, Frequency, ATU
Course Tuning, ATU Fine Tuning and a host of other settings
like grounding options.
- Switched Mode Power Supply that is
fully regulated
- Stereo cable with twin RCA plugs and
3.5mm jack
- 3 Metre Antenna
- Optional Accessories
- Weather Proof Transmitter Housing to IP
65
A. You get a Metzo
The
Metzo transmitter is ready built and ready to run...at an affordable
price...with the performance and features of units costing many times the price...!>
The
Metzo employs the same crystal controlled frequency synthesizer
as the Gizmo for accurate
tuning and drift free frequency stability. The synthesizer
tunes the entire AM broadcast band (500 - 1800 kHz)>
The
Metzo provides the full 100 mill-watts, as allowed for FCC
Part 15 operation without a license.>
The
Metzo employs an updated RF output and modulator stages
based on the Gizmo, with new features that results in
very low
distortion modulation right up 100%, and an almost indestructible
output stage, with the ability to increase the output power beyond
100mw if and when the FCC rules permit.>
The
Metzo has a totally new active two channel mixer for
either Stereo to Mono or twin channel Mono audio sources.
Followed by a Audio equalizer capable of plus or minus 14db
boost/cut to both treble and bass frequencies.>
The
Metzo has a totally new ATU (Antenna Tuning Unit) which
can handle 1 Watt of RF and has an variable capacitor to peak
the network to match a 3 Metre Antenna as specified under Part
15 rules.To
make setting up the transmitter as simple as possible, we have
added a "marker" tone generator and RF and Modulation level
monitoring.>
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The
Metzo has a totally new Audio Compressor/Limiter based
on the SSM2166 chip from Analog Devices. The Compressor
maintain a distortion-free 100% modulation from audio
sources having wide dynamic range. The three
front-panel controls allow you to set input gain,
modulation level (limiter threshold) and compression
ratio. The compression ratio is adjustable from 1:1
to 5:1. Audio levels that exceed the set modulation level
(limiter threshold) are limited by compressing at a fixed
15:1 ratio.> |
The
Metzo has a totally new power supply design that
eliminates low frequency hum, by incorporating two voltage
regulators "on-board", one for the Audio circuits and
one for the RF circuits, and a new grounding technique that
splits the RF and Audio grounds, as well as providing and
external grounding point. In addition a new external
"universal" switch mode power supply provides
regulated DC power to the transmitter.>
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Fully Built and Tested
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- High Quality PCB
- Plastic CASE to IP56
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AC Power Adapter
included
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- Switched Mode Power
Supply
15V DC 90-240V AC 50-60 Hz
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Audio Cables and Antenna
included
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- Stereo 3.5mm jack to
twin RCA (Phono)
- 3 Metre Antenna with
RCA (Phono)
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Professional quality
audio compression and limiting
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Audio Compression maintains 100% modulation regardless of audio input
level.
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- Adjustable 1:1 db to 5:1 db compression ratio.
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Audio Limiting
prevents over modulation regardless of audio input
level.
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-
Audio levels above threshold are compressed at 15:1
db ratio.
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Crystal Controlled
Frequency Synthesizer
covers entire AM broadcast band.
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- 500KHz to 1800 KHz in 9
or 10KHz steps
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Specifications
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Frequency Range
(Broadcast):
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Frequency Range (programmable):
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- 500 to 1800
KHz in 10 KHz steps (US Mode)
- 500 to 1700
KHz in 9 KHz steps (EU Mode)
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Frequency Selection:
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Frequency Stability
@ 25°>C:
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Fundamental Crystal
Frequency:
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- 10.240 MHz (US
Mode) for 10 KHz channels
- 4.608 MHz (EU
Mode) for 9 KHz channels
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Crystal Frequency
Adjustment:
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Modulation Type:
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- Amplitude
Modulation (AM)
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Maximum Modulation
Level:
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Power Input to RF
Amplifier:
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- 100mw (US
Mode) to comply to FCC Part 15 rules
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Antenna:
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- Supplied with
3 metre antenna
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Antenna Socket:
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Antenna Matching:
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Pi-network with
Antenna matching using:-
- Inbuilt ATU,
with trimmer to peak antenna resonance
- External ATU
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RF Ground:
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Tuning Marker Tone:
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- 625 Hz or 1250
Hz marker tone generator for transmitter set-up and antenna
tuning
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Audio Response:
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Audio Treble Boost /
Cut:
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- ±>
14 db infinitely variable
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Audio Bass Boost /
Cut:
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- ±>
14 db infinitely variable
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Audio Distortion:
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- 0.5 % THD via
audio stage
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Audio Input
Sensitivity: (min)
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- 30 mv RMS for
100% modulation
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Audio Compression:
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- Adjustable
from 1:1 to 5:1
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Audio Limiting:
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- Adjustable
15:1 compression above threshold
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Audio Noise Gate:
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- Adjustable
noise reduction threshold
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Controls:
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- Audio Gain
(Stereo Mixer)
- Audio Gain
(Compressor)
- Audio
Compression
- Audio Limiting
- Audio Noise
Gate
- Treble
Cut/Boost
- Bass Cut/Boost
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Indicators:
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- RF Level
- Audio Level
- Modulation
Level
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Connectors:
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- RF Socket RCA
- Audio Ch 1
(Left Ch) RCA
- Audio Ch 2
(Right Ch) RCA
- DC Power 2.1mm
- Ground
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Power Consumption:
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Power Supply:
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- 90-240V 50-60
Hz Switched Mode PSU fully Regulated
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Dimensions:
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- Width
140 mm
- Depth
110 mm
- Height
35 mm
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EU R&TTE
directive and EMC Directive 2004/108/EC
- in order to purchase this item, you must agree that:-
1. You intend to re-export the item to an address outside the
European Union. Under no circumstances will this item be resold
or put into service within the European Union.
or
2. The item will only be used within a completely RF screened
and shielded metal enclosure or environment for testing,
evaluation, experimental or laboratory purposes and any other
use that does not radiate electro-magnetic waves into free
space. |
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All specifications subject to change
without notice
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