Technical Resources
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Transmitter Manuals
Retekess 15w Bluetooth Transmitter
This unit can be branded as Retekess or as NioRFNio
FM User 25w Transmitter
Model No CZE-T251
FM User 15w Transmitter
Model No CZH-15A & Model No ST-15B.
These are both effectively the same unit.
RVR 700w Transmitter
Model No TEX702LCD
FMT Camel Series Transmitter
These transmitters are branded as Camel, FMT or perhaps both.
Model Number FMT 350H
User Manual 1.8MB
Service Manual including circuit diagrams 2.1MB
RVR 300W Transmitter
These Transmitters were purchased/first went into service in 2021/22
Model Number RVR TEX300LCD User Manual
Transmitter Startup Operation YouTube Video
RVR 1 KW Transmitter
There are two different models we have in service.
Model Number RVR TEX102LCD User Manual
Model Number RVE TEX102 TFT User Manual Introduction YouTube video
AAREFF 100W Transmitter
This transmitter comes with a 5 year warranty.
Model Number User Manual
AAREFF 250W Transmitter
This transmitter comes with a 5 year warranty.
Model Number User Manual
AAREFF 1KW Transmitter
This transmitter comes with a 5 year warranty.
Model Number RVR TEX102LCD User Manual
CROWN Transmitter
Used in some nations – eg Indonesia
For Classic LPFM 30 – 15 – 300w transmitters User Manual
Modulation Compensation Manual
Antenna & Aerials
Folded Dipole Antenna
Can be made of Stainless Steel or Aluminuim
1/4 Wave Antenna with adjustable tip
Aluminium construction with a telescopic tip
Testing results and calculated (theoretical) length
1/4 Wave Antenna – Fixed length
Steel construction with fixed length tip. These antenna can be trimmed to length to achieve optimal SWR. Where possile we have provided these with the tip length that is best for the local broadcast Frequency.
Testing results and calculated (theoretical) length
Circular Dipole Antenna (1) – RVR Model ACP1
This antenna is in use in Dili – Timor-Leste
Circular Dipole Antenna (2) – ERi Model 100A Series
This antenna may be the one we choose to use for Rote Island in Indonesia
AAREFF 2 Way Stacked Dipole Antenna
AAREFF 4 Way Stacked Dipole Antenna
5/8 Wave Antenna for up to 1KW
This antenna is in use in Munda and Honaira.
Solar
Solar Controller
Steca PR3030 – this is a small unit used with installs with (for example) two x solar panels and one x 100Ah battery.
Fronius Solar Controller
Fronius Primo 5.0 – this is a 5Kw unit used in Wewak PNG.
Growatt Solar Controller
Growatt SPF 3000TL LVM – this is a 3Kw unit used in Munda and Honiaria in the Solomon Islands.
Other Technical Equipment
SWR Meter
Avair AV-600 SWR Meter
There is also this training video showing how SWR meters work. While this video isn’t specific to the model we use, it gives you a good overview and is worth watching.
Significance of the SWR reading
An SWR of 1:1.0 or sometimes just referred to as 1.0 indicates that all power from the transmitter is being absorbed by the antenna.
An SWR of 1.5 indicates that virtually all the power is being absorbed by the antenna. The power being reflected back is only a very small amount is not anything to worry about.
An SWR of 1.8 is starting to get a little bit over the ideal, however most transmitters will run happily at this. Also some broadband type antennas will have SWR of up to 1.8 at the far ends of their tuning range, this is acceptable.
An SWR of 2.0 is starting to get a bit too high. However, even at this level most transmitters will run without a problem. If you are using high power (100W and over) at this SWR it is time to service and adjust your antenna system to get the SWR to 1.5 or less.
An SWR of 2.5 or over is too high and some transmitters will be damaged at this level. It’s advisable not to use a transmitter at this level of SWR.
Here is an online SWR calculator
https://www.aareff.com/en/calculating-swr/
Analogue Timer Switch
24 Hour timer switch with manual push pins. There are variations on this unit but they all operate with the same principles.
Simple instruction diagram pdf
There is also an Instructional Video showing how to set the timer up for use with a tablet.
Digital Timer Switch
24 Hour timer switch with an LCD screen.
NOTE: if the LCD screen is blank the internal battery will need charging before you can use it. Leave the unit plugged into the power for 30 minutes and the LCD screen should come back on. If the screen doesn’t come back on, the internal NiMH Battery may need replacing.
Coaxial Cable
We use one of three main types of Coaxial cable with our radio installations. Which one depends on the transmitter output power and the length of the cable run.
Brief Description of the three types pdf
Hyundai Standby Generator
For the Generator that is use in Wewak.
Maintainance Manual – pdf 228KB
Instruction Manual for the Intelilite MRS 10 Ggenerator Control Panel – pdf format 887KB
RF Connectors
These are the main type of connectors used on our broadcast equipment.
These connect the Transmitter to the Antenna cable.
Click on an image to see a larger view.
How To Guides
Before replacing any transmitter you need to know this… pdf format
Basic Lightning Protection. How to set this up… pdf format
How to set an Analogue Timer Switch… video
Standalone Station trouble Shooting Guide… pdf format
Transmitter modification for extra Lightning Protection… pdf format
Training Videos
Significance of the SWR reading
An SWR of 1:1.0 or sometimes just referred to as 1.0 indicates that all power from the transmitter is being absorbed by the antenna.
An SWR of 1.5 indicates that virtually all the power is being absorbed by the antenna. The power being reflected back is only a very small amount is not anything to worry about.
An SWR of 1.8 is starting to get a little bit over the ideal, however most transmitters will run happily at this. Also some broadband type antennas will have SWR of up to 1.8 at the far ends of their tuning range, this is acceptable.
An SWR of 2.0 is starting to get a bit too high. However, even at this level most transmitters will run without a problem. If you are using high power (100W and over) at this SWR it is time to service and adjust your antenna system to get the SWR to 1.5 or less.
An SWR of 2.5 or over is too high and some transmitters will be damaged at this level. It’s advisable not to use a transmitter at this level of SWR.
Here is an online SWR calculator