Based on our extensive experience of broadband power amplifiers
this unit will produce 100 Watts 24 hours a day at any single
frequency from 87.5 to 108 MHz. The power amp will never have
be returned or sent to a specialist for a re-tune if a frequency
change is required.
The 100W power amp is available as a 13.8V DC unit requiring around
12 amps. This is most useful for remote sites that use heavy duty
vehicle batteries as back up. There is also an high quality mains
power supply available to accompany this power amp. The mains
power supply has a solid 13.8V DC output capable of providing
an additional continuous 4 amps to power a driver transmitter
or power amp of 20/25W.
For maximum reliability and system redundancy the 100W power amp
is designed around two rugged 50W broadband power amps paralleled
together using a broadband susceptance compensated Wilkinson combiner.
In the unlikely event of a 50W power amp module developing a fault
the other 50W power amp will continue to run keeping the station
on air. This is of great benefit to stations that carry advertisements
and cannot afford a shut down at any time.
The 100W power amp is designed to be stacked easily. For example,
stacking two 100W power amps with two stacked dipoles will give
about 500W EIRP or stacking four 100W power amps with four stacked
dipoles will give about 2000W EIRP.
To make the 100W PA as compatible as possible with our existing
power amps and transmitter/drives the 100W power amp has been
designed to take the following drive levels 25W or 30W, this drive
level needs to be stated on ordering.
Test results @ 13.8VDC, 50 Ohm Load,
Bird Thruline Power Meter.
Freq. |
i/p
(w) |
o/p
(w) |
i/p
SWR |
DC
(A) |
Efficiency |
2F |
88 |
30 |
97 |
1.7 |
10.2 |
69% |
-50
dB |
90 |
30 |
102 |
1.8 |
10.6 |
70% |
-50
dB |
92 |
30 |
108 |
1.6 |
11.1 |
71% |
-50
dB |
94 |
30 |
106 |
1.6 |
11.0 |
70% |
-50
dB |
96 |
30 |
106 |
1.5 |
11.0 |
70% |
-54
dB |
98 |
30 |
102 |
1.5 |
10.2 |
72% |
-51
dB |
100 |
30 |
102 |
1.4 |
10.5 |
70% |
-51
dB |
102 |
30 |
100 |
1.4 |
10.3 |
70% |
-51
dB |
104 |
30 |
102 |
1.4 |
10.5 |
70% |
-52
dB |
106 |
30 |
107 |
1.5 |
10.6 |
73% |
-52
dB |
108 |
30 |
102 |
1.6 |
10.7 |
69% |
-52
dB |
No trace of ANY signal measured
at 0.5F, 1.5F or 2.5F.
|