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Veronica FM radio transmitters
1W
PLL 'EASY-TUNE' TRANSMITTER (PLL3)
HIGH PERFORMANCE KIT RANGE
Perfect Audio Every Time..... |
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The Veronica 1W PLL first marketed in 1996 is still
the favorite choice for broadcast engineers at all levels from the
hobbyist through to the professional licensed operator. In early 1998
the PLL 2 was released and then in January 2000 the latest version was
released, the PLL 3 'Easy-Tune'.
Without any amplifier tuning the PLL 3 produces a clean flat 1W output
from 87 to 109 MHz, this is a match made in heaven for our high quality
12W and 25W variable output 'No-Tune' RF power amplifiers.
Reliability is now even better with an improved cooler running broadband
RF output amplifier. The RF output device is rated at 1.8 watts, since
the PLL 3 is running at only 1W, stabilty and ruggedness is excellent
even at very high SWR.
The audio signal to noise ratio is better than -80dBu, this is achieved
by using a lightly loaded high stability half frequency push-pull
Hartley oscillator for generating the RF signal. The output of the
Hartley oscillator is configured as a frequency doubler using a
push-push arrangement, filtered and amplified by two high stability
amplifiers to 1 watt.
All the parts for the 1W PLL 3 are readily available all over the world
should you ever need spares. The PLL circuitry is 100% hardware
controlled and will never suffer from software bugs or processor
crashes. The ICs are the standard TTL 74... series and CMOS 4000 series.
This PLL synthesizer is specially designed for high quality wideband FM
with an audio frequency response that's near flat from 30Hz to 76KHz
with selectable pre-emphasis. This important feature provides optimum
stereo separation when used with a stereo coder. CD's and other audio
sources are reproduced with the finest of clarity. As with the original
PLL and the PLL 2 expensive test equipment is not required to set up the
transmitter. Setting up the unit ready for broadcasting is made easy
using the built in LED's that indicate power output and lock conditions.
The Veronica PLL is known throughout the world as professional class
equipment at excellent value for money. Thousands of stations throughout
the world now use Veronica products for high quality broadcasting.
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Frequency
RF Power Output
Spurious Emissions
Frequency Stability
RF Output Connector
Audio Input Sensitivity
Signal To Noise Ratio
Frequency Response
Pre-emphasis
Audio Distortion
Audio Input Connector
Power Input
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(87.5-108MHz) User Programmable
Typ 1000mW into 50 Ohm load
Better than -40 dB ref to carrier
PLL Typ +/- 500 Hz
SO239
0.775 V rms for +/- 75 KHz
80 dBu
Flat from 30 Hz to 76 KHz
(50uS/ 75uS/ None) Selectable
Better than 0.2 % THD
Phono/ RCA type unbalanced sockets
13.8V DC Regulated 750mA
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50mW
FM TRANSMITTER KIT
HIGH PERFORMANCE KIT RANGE
Perfect Audio Every Time..... |
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Oscillator
operates at half frequency for excellent frequency stability, Typ 25KHz
@100MHz |
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Polarity
Protected and operates on any DC power supply or battery over 6-16V DC |
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Easily
Tunable from 88 to 108MHz |
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Ideal
for broadcasting audio from Mixers, CD Players, Tape Decks, Satellite
Receivers etc |
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Up to
500m range |
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Low
Noise, Audio S/N Ratio Better than 60dB |
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Audio
Response 30Hz to 76KHz +/- 0.5dB |
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Audio
Distortion less than 0.5% |
You can be the streets DJ on
your own radio station or listen to music on your radio from anywhere in
the house with this kit. Students and enthusiasts can use the circuit
for RF experiments. Some situations such as a field or stadium requires
long wires for audio transfer, this may be time consuming and expensive.
Eliminate such problems with this Low Power Transmitter and a standard
FM Receiver.
Power the circuit up and select a clear frequency between 88 and 108
MHz. Connect your Hi-fi, Mixer, CD player or anything with a standard
line output to the audio input of this circuit and then you're on the
airwaves. The audio input to the transmitter is adjustable which allows
a loud distortion free signal to be set. A range of up to 500 metres is
possible with the right antenna and power supply. The instructions
include full details on maximising the range. Power for the transmitter
can be batteries or a regulated mains adapter with a 6-16 volt output.
Mains adapters will not cause any undesirable buzzing noises on the
audio, all you will hear is clean crisp audio.
Out of all the low cost transmitters available on the market, this beats
them all in every respect. The technical specification is superior and
the PCB and components are the highest of quality.
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50mW
FM STEREO TRANSMITTER KIT
HIGH PERFORMANCE KIT RANGE
Perfect Audio Every Time..... |
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Using the 19KHz pilot tone system this kit delivers
performance only matched by the most expensive stereo coders. The single
chip low power stereo transmitter designs available from other
manufacturers are unreliable and unstable. These particular
manufacturers quote 'high stability, high quality, professional
performance etc', but always fail to commit themselves to publishing any
true specifications. All the parts for this kit, including PCB are
supplied, even the phono sockets, for easy hook up to your Hi Fi.
Use of the kit includes stereo radio all around the house and beyond
from your satellite receiver or Hi-fi. Just imagine you can listen to
your favorite CD's in the bath or during a family barbecue.
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Oscillator operates at half
frequency for excellent stability, Typ 25KHz @100MHz |
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Polarity Protected and
operates on any power supply or battery over 9-16V DC |
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Easily Tunable from 88 to
108MHz |
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Up to 500m range |
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No test equipment required
for setting up transmitter |
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Ideal for broadcasting audio
from Mixers, CD Players, Tape Decks, Satellite Receivers |
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Stereo Crosstalk 35 dB Pilot
Tone 19 KHz |
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PCB Mounted Audio Phono/RCA
Socket |
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Pre-emphasis 50uS (75 uS USA) |
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Low Noise, Audio S/N Ratio
Better than 60dB |
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Audio Response 30Hz to 15KHz
+/- 0.5dB |
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Audio Distortion less than
0.5% |
1W
FM TRANSMITTER KIT
HIGH PERFORMANCE KIT RANGE
Perfect Audio Every Time..... |
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Please
note that this product is not licensable for use with an antenna in the
UK.
This transmitter offers a bit more kick than our lower power model and
is great for the beginner who requires a little more power. The kit is
easy to build providing you are able to solder and read the
instructions.
Typical use's are a neighbourhood or village radio station. As with all
our kits the audio quality is a match for any Hi Fi system. Should you
require stereo or audio compression at a later date, this kit is
suitable for use with our Crystal Stereo Coder and Limiter Compressor.
The RF connection is via a PCB mounted SO-239 at 50 ohm, included with
the kit. Use of any normal 50 ohm SWR meter is possible, allowing a
perfect match to be found. If this isn't enough, the circuit design
includes an LED indicator as a tuning aid. The brighter the LED, the
more power output there is, this makes tuning to any match dead easy. A
50 ohm dummy load comes with the kit for testing purpose's. A range of
up to 2 miles is possible if used with a well mounted high quality tuned
50 ohm antenna.
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No
test equipment required for setting up transmitter |
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Oscillator
operates at half freq for excellent frequency stability, Typ 25KHz
@100MHz |
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Easily
tuned from 88MHz to 108MHz |
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Low
Noise, Audio S/N Ratio Better than 60dB |
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50 ohm
Dummy Load Included |
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PCB
Mounted Standard RF SO-239 Socket |
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Ideal
for radio broadcasting up to 2 miles |
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Audio
Response 30Hz to 76KHz +/-0.5dB |
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PCB
Mounted Audio Phono/RCA Socket |
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Low
Audio Distortion, less than 0.5 % |
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Polarity
Protected and operates on any power supply or battery over 11-16V DC |
Mono Versions
Stereo Versions
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5W
FM TRANSMITTER KIT
HIGH PERFORMANCE KIT RANGE
Perfect Audio Every Time..... |
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Please note that this
product is not licensable for use with an antenna in the UK.
Make no mistake this is a genuine 5 watt RF output FM transmitting kit
with a clean stable performance. When connected to a correctly matched
antenna, broadcasts over an entire town or small city are possible.
For testing and setting up, a 5 watt 50 ohm dummy load comes with the
kit. The circuit design includes an LED indicator as a tuning aid. The
brighter the LED, the more power output there is, this makes tuning to
any match very simple. Alternatively, a standard 50 ohm SWR meter
indicates the match more accurately.
Kit includes all parts for a working model with PCB and large aluminum
heatsink. PCB mounted audio phono/RCA and RF SO-239 sockets enable an
easy connection to most types of equipment Just solder the kit together
with a good quality soldering iron, apply a power supply and antenna,
then play your music to the population.
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Ideal for radio broadcasting
up to 5 miles |
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Low Noise, Audio S/N Ratio
Better than 60dB |
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Easily tuned from 88MHz to
108MHz |
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Audio Response 30Hz to 76KHz
+/-0.5dB |
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50 ohm Dummy Load Included |
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Low Audio Distortion, less
than 0.5% |
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Oscillator operates at half
frequency giving high stability, typ 25KHz @100MHz |
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Polarity Protected and
operates on any power supply over 11-16V DC |
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PCB Mounted Audio Phono/RCA
Socket |
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PCB Mounted Standard RF
SO-239 Socket |
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No test equipment required
for setting up transmitter |
CRYSTAL
REFERENCED STEREO CODER
HIGH PERFORMANCE KIT RANGE
Perfect Audio Every Time..... |
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With this kit, you can convert
your existing mono Veronica transmitter into a high quality FM stereo
broadcast transmitter. The coder takes a separate left and right audio
signal on two separate cables and combines them together to form just
one signal coming out on one cable. This unique signal is called
multiplex and can be fed into any mono Veronica transmitter. Any stereo
tuner receiving this signal decodes the multiplex back into separate
left and right audio signals. Stereo coder and receiver decoder
synchronise to each other using a 19KHz pilot tone which is also added
to the multiplex signal. Only the most expensive stereo coders will
match the spec of this unit due to the pilot tone being crystal
generated.
For the first time high quality FM stereo is available to all, at low
cost. This kit includes all parts, PCB and phono input and output
sockets allowing easy hook up to your audio source and transmitter. No
test equipment is required to set this unit up.
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No
test equipment required for setting up transmitter |
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Audio
Inputs Standard Line Level 0dBu 775mV adjustable |
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PCB
Mounted Input and Output Audio Phono
RCA Type Sockets |
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Operates
on any regulated power supply or battery over 11-16V DC |
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Pre-emphasis
50 or 75 uS |
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Stereo
Crosstalk 35 dB |
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Low
Audio Distortion, less than 0.5% |
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Pilot
Tone 19 KHz +/-0.2Hz |
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Low
Noise, Audio S/N Ratio Better than 65dB |
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Audio
Response 30Hz to 76KHz +/-0.5dB |
AUDIO
COMPRESSOR LIMITER
HIGH PERFORMANCE KIT RANGE
Perfect Audio Every Time..... |
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In any sound broadcasting
system the audio level must be controlled to prevent over modulation.
The current trend is for broadcast stations to transmit a constant level
of audio optimised to 100%. This gives the listener 'loud' audio and
prevents constant re-adjustment on the receiver volume control. The
Veronica Limiter Compressor is specifically designed to achieve constant
100% modulation without any over modulation using an FM broadcasting
transmitter. The result is a professional sound on your station output
with all music and speech inputs.
The Limiter Compressor circuit operates the audio gain around 3
individual time constants. These control a smooth AGC combined with a
very fast attack on audio signal peaks. Audio compression and output
level are constant for input levels between -6dBu and +24dBu. The
limiter circuitry also includes built in pre-emphasis.
Some audio equipment, usually CD players output high frequency signals
above the audio spectrum. Signals such as these entering a transmitter
or stereo coder are very undesirable and cause many problems. The
Veronica Limiter Compressor is correctly fitted with a 15KHz brick wall
low pass filter to block the high frequencies.
Note: Stereo requires two units
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Peak
Limiting with AGC Action |
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Better
than 1 mS Attack Time |
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Very
Low Noise (-75 dBu S/N Ratio) |
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Very
Low Distortion (0.2% at limiting) |
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30Hz-15KHz
Frequency Response |
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50uS
Pre-emphasis (75uS USA) |
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Standard
0dBu 775 mV rms Output |
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3
LED's indicate Compression Level |
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Single
Supply Operation 11-16V DC |
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Very
Large Audio Inputs Acceptable (up to +24dBu 12Vrms) |
AUDIO
COMPRESSOR LIMITER
PROFESSIONAL RANGE
Continuous Reliable
Power...... |
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STEREO AND MONO AUDIO
LIMITER COMPRESSORS
The audio level in any sound broadcasting system must be controlled to
prevent over modulation. The current trend is for broadcast stations to
transmit a constant level of audio optimised to 100%. The Veronica
Limiter Compressor is specifically designed to achieve constant 100%
modulation without any over modulation using an FM broadcasting
transmitter. The result is a professional sound on your station output
with all music and speech inputs. This unit is fully enclosed in
aluminum and steel casing measuring 279 x 190 x 89 mm
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Peak Limiting
with AGC Action |
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Better than 1 mS
Attack Time |
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Very Low Noise (-75 dBu S/N Ratio) |
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Very Low Distortion (0.2% at limiting) |
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30Hz-15KHz Frequency Response |
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50uS Pre-emphasis (75uS USA) |
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Standard 0dBu 775 mV rms Output |
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3 LED's indicate Compression Level |
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Single Supply Operation 11-16V DC |
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Audio Inputs up to +24dBu 12Vrms |
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mono versions
stereo versions
REGULATED
POWER SUPPLIES
PROFESSIONAL RANGE
Continuous Reliable
Power...... |
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220-240VAC/12V 300ma REGULATED POWER SUPPLY
Small adapter type power supply with switchable output from 3 to 12V.
Ideal for use with transmitter kits up to 1W. (Not recommended for 1W
PLL or 5W kits)
PRICE (only suitable for use in the UK)
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100-240VAC 50-60Hz/13.8V 2.5A REGULATED SWITCH MODE
POWER SUPPLY
Suitable for use with any of the kits and transmitters up to 5W. This
power supply automatically adjusts itself to operate on any AC mains
power system in the world. Features include short circuit, overload and
over voltage protection. The power supply is immune from RF and
constructed in a insulated enclosure to meet all international safety
standards.
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100-240VAC 50-60Hz/13.8v 4.4A REGULATED switched
mode POWER SUPPLY
Suitable for use with many of the kits and transmitters. This power
supply automatically adjusts itself to operate on any AC mains power
system in the world. Features include short circuit, overload and over
voltage protection. The power supply is immune from RF and constructed
in a insulated enclosure to meet all international safety standards.
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100-240VAC 50-60Hz /13.8V 8A REGULATED
SWITCHED MODE POWER SUPPLY
Suitable for use with many of the kits and transmitters. This power
supply automatically adjusts itself to operate on any AC mains power
system in the world. Features include short circuit, overload and over
voltage protection. The power supply is immune from RF and constructed
in a insulated enclosure to meet all international safety standards.
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100-240VAC 50-60Hz /13.8V 16A REGULATED
SWITCHED MODE POWER SUPPLY
Suitable for use with m any of the kits and transmitters. This power
supply automatically adjusts itself to operate on any AC mains power
system in the world. Features include short circuit, overload and over
voltage protection. The power supply is immune from RF and constructed
in a insulated enclosure to meet all international safety standards.
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FM
TRANSMITTER POWER
AND RANGE
TECHNICAL INFORMATION
Continuous Reliable Service...... |
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In theory the range of a transmitted
radio signal is infinite regardless of power used, basically it goes on
and on forever until it encounters an obstruction. More power helps to
penetrate any obstructions. Given this, when engineering and planning a
station it is always better to consider the issues that limit the range.
Range is limited by:
a) How far the transmitting antenna can effectively see. If you stand
where the antenna is mounted and look out with a pair of binoculars,
wherever you can see it is possible to transmit to. This can sometimes
be up to 20, 30 even 40 miles if you are looking out from a mountain
top.
b) Other sources of interference or other stations operating on the same
frequency. For example the antenna may be able to see 20 miles, but if
another station is on the same frequency 20 miles away, it will
block/interfere with the signal.
c) Transmission power. If the antenna can see 20 miles, but say 1 Watt
ERP of power used, it's very likely that about 1 mile of range will
result. This is quite simply because there is not enough power to
propagate the signal 20 miles. If 50 Watt ERP is used, it's very likely
that 20 miles of range will be achieved. This is because 50 Watt ERP is
ample power to propagate a strong signal 20 miles. If 1 Million Watts of
power is used, it is very likely that signal will only propagate just
over 20 miles. This because the range is limited as described in point
a) above.
Assuming the antenna has a clear view, the frequency is clear and an
average quality portable receiver is used, typical transmission power
ver range figures are as follows:
Watts
ERP
1
2
4
8
16
32
64
128
256
512
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Range
Miles
1.5
2.1
3.0
4.2
6.0
8.6
12.0
17.0
24.0
34.0
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