magazine-201408

New hamgear and gadgets
RPT-2D Two Way Radio Repeater Box for Two Transceivers
Station DIY Description
Ultra Beam Yagi UB20-MX
Frequency range : 14 – 50 Mhz
The frequency of most of the handheld walkie-talkies on the
market is 400-470MHz, and the max output power is 5W. This
makes the effective talking range about 5-8KM(only in wideopen
area). In some areas such as in the city with tall buildings,
the range is only 1-2 km, or less. In order to have long-distance
communication, we need a repeater. Standard repeaters have a
high cost, and can be complicated to install, so there was a need
for a simple and inexpensive repeater.
The operation is very simple, and no power supply needed! You
do not need to change any part of the radio. All you need is just
two handheld radios and connect the cables to the external mic/
spk ports (2.5mm&3.5mm). You now have a very practical small
repeater!
Functions
With this RPT-2D Two Way Radio Repeater Box, both of the radios
can transmit and receive in VHF band or UHF band or cross
band.
3 elements yagi : 6-10-12-15 meters
2 elements yagi moxon : 17-20 meters
Gain (dBd) : 5,8
Gain (dBi) : 7,95
F/B ratio (dB) : 25/30
Power (PeP)
: 3500 watt
Longest elements : 7 meter
Boom length
: 2,9 meter
Boom diameter : Square 60×60 mm.
Max wind-area : 0,47
Rotating radius
: 3,5 meters
Mast diameter
: 50 mm.
Weight :
: 19,5 Kg
Price € 1.843,00
excl. VAT at Classic
International
Comunications
https://www.youtube.com/watchv=A9faCP4rZbg
Price $ 32.00 at amazon.com
DKARS Magazine, editie 2 -33- Augustus 2014