AMP25 – 25W RF Amplifier ‐ User Manual
Tugicom –
www.tugicom.com
STEP 2 - OPERATING
You must verify that an antenna or a 50ohm dummy load is connected to the output, a missing
antenna or mismatched antenna could damage the output transistor which is NOT included in
warranty!
1.
Connect the antenna or dummy load to the RF output.
2.
Power up the power supply.
3.
Turn on the 1W exciter.
4.
In AMP20WA
In this point, a 20W should be driven to the antenna, If you have Watt meter it will be the best way
to test the output power, if a watt meter is not available, you can test the Current from the power
supply a consumption of 1.5A-2A is the normal current and should output 20W.
Antenna
The antenna is one of the major elements which effect on the range of your broadcast.
You will need to pay attention to the coaxial cable which will be described later.
The Best position for a FM broadcast antenna is the highest place which from him you have line sight
as far as possible without any interference from other buildings, mountains and other high object which
may interfere your broadcast signal.
Always remember that the critical parameter is not whether you broadcast 1W or 5W, but whether you
are 10 or 15 meters above ground.
The best antenna for this transmitter will be a 50 ohm antenna which was matched exactly to the
frequency you will need to use, but the price of those antennas may be high.
For a low cost antenna, we recommend standard "dipole" FM antenna from any radio equipment which
looks like 2 radiators in calculate length 75/freq(MHz), example: At frequency of 100MHz, the length
of each radiator will be 0.75m.
Many antenna designs are also available on the internet.
If you need a simple temporary antenna, connect a 75 cm wire to the center of the RF output connector,
not ideal but will do the job to broadcast locally. Notice: you must keep distance between the
temporary antenna and audio cables & devices.
CAUTION: DO NOT TOUCH CENTER LEAD on ANTENNA OUTPUT when transmitter is turned
on, it may cause SERIOUS RF BURNS!
That’s all, have fun transmitting and always remember not to disturb other stations, it is against the
law.
Thank you for purchasing one of our products.
Tugicom RF Design.
Come visit our website for updates and new products:
www.tugicom.com
Please check the rules in your country before operating radio equipment.
Telefax: +972-9-8615533 P.O. BOX 574, Netanya Israel