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12W FM
VARIABLE POWER AMPLIFIER
'NO-TUNE'
WIDEBAND
Jiva, the new name in
wideband technology..... |
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This power amp is the perfect companion
for our PLL transmitter and any other 500mW to 1W transmitter. The large
RF gain provides a massive power boost of around 14dB (25 times !!!!).
Unlike other power amps on the market, this unit is supplied complete
with heatsink fully built and tested. The 100-240V AC model will operate
on any mains power supply in the world. Just hook up the power amp to
your antenna, transmitter drive and power supply. Never take off the
lid, no tuning needed, no test equipment required. This unit is truly
plug and play.
The power amp will remain very stable under severe load mismatch
conditions. Harmonics and spurious are below -50dB making the amp
compatible with most countries licensing conditions. The power amp is
suitable for RSL stations in the UK.
The circuit design uses discrete transistors, not an RF module. This
ensures that any replacement parts will always be readily available.
Careful design of the RF output stage matching provides very efficient
DC to RF conversion allowing the amp to run just warm in nearly all
environments without an additional fan. This efficiency will give the
power amp long life and reliability.
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Ideal for radio
broadcasting up to 9 miles |
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11dB of RF Gain |
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Wideband 'No
Tune' from 88MHz to 108MHz |
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Input VSWR less
than 1.3 |
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Operates from
standard 13.8V power supply |
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Rugged, 30:1 SWR
mismatch capability |
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Supply Current
only 2.5 to 3 amps |
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Very Stable up
to 30:1 SWR mismatch |
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RF Power and DC
Supply LED indicators |
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Compact size of
120mm x 100mm x 62mm |
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Heatsink Mounted
50 Ohm RF SO-239 Input and Output Sockets |
| PSU |
Drive |
Min O/P |
Typ O/P |
| 13.8v |
0.5W |
7W |
8W |
| 13.8v |
1W |
12W |
13W |
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No Low Pass
Filter Required, Spurious and Harmonic Emissions better than -50dB |
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25W FM
VARIABLE POWER AMPLIFIER
'NO-TUNE'
WIDEBAND
Jiva, the new name in
wideband technology..... |
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|
This power amp is the perfect companion
for our PLL transmitter and any other 1W transmitter. The large RF gain
provides a ample power boost of around 11dB (12 times !!!!).
Unlike other power amps on the market,
this unit is supplied complete with heatsink fully built and tested. The
100-240V AC model will operate on any mains power supply in the world.
Just hook up the power amp to your antenna, transmitter drive and power
supply. Never take off the lid, no tuning needed, no test equipment
required. This unit is truly plug and play.
The power amp will remain very stable
under severe load mismatch conditions. Harmonics and spurious are below
-50dB making the amp compatible with most countries licensing
conditions. The power amp is suitable for RSL stations in the UK.
The circuit design uses discrete
transistors, not an RF module. This ensures that any replacement parts
will always be readily available. Careful design of the RF output stage
matching provides very efficient DC to RF conversion allowing the amp to
run cool in nearly all environments without an additional fan. This
efficiency will give the power amp long life and reliability.
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Ideal for radio
broadcasting up to 12 miles |
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14dB of RF Gain |
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Wideband 'No
Tune' from 88MHz to 108MHz |
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Input VSWR less
than 1.3 |
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Operates from
standard 13.8V power supply |
|
Rugged, 30:1 SWR
mismatch capability |
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Supply Current
only 3 to 3.5 amps |
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Very Stable up
to 30:1 SWR mismatch |
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RF Power and DC
Supply LED indicators |
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Compact size of
120mm x 100mm x 62mm |
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Heatsink Mounted
50 Ohm RF SO-239 Input and Output Sockets |
| PSU |
Drive |
Min O/P |
Typ O/P |
| 13.8v |
0.5W |
23W |
25W |
| 13.8v |
1W |
24W |
26W |
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No Low Pass
Filter Required, Spurious and Harmonic Emissions better than -50dB |
13.8v version
100-240vac version
30W FM
VARIABLE POWER AMPLIFIER
'NO-TUNE'
WIDEBAND
Jiva Wideband Power Amp
Range..... |
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This power amp is primarily designed for
use with our 5W transmitter, however there is no reason why it cannot be
used with any other 5W driver that will operate into 50 ohm termination.
In an open environment the RF power increase from 5W to 30W will improve
the range by about 2.5 times.
The whole power amp unit comes ready to use ' plug and play ' on
delivery. Just hook the power amp to your antenna, transmitter drive and
13.8v (4.5 amp continuous) power supply and that's it, you're on..
Test equipment is not required to set up and operate this amp. The
output stage delivers a minimum of 30W into a 50 ohm antenna/dummy load
from 88 to 108MHz without ever having to take off the lid to carry out
any tuning or tweaking.
High SWR conditions will not drive the amp unstable and furthermore the
amplifier will not self oscillate without RF input drive or connection
while the DC power is applied. Harmonics and spurious are below -50dB
making the amp compatible with most countries licensing conditions.
The circuit design uses a very robust single stage discrete transistor,
not an RF module. Our research shows that replacement output
transistors, in the unlikely event they are needed, will be available
for many years into the future.
Heatsink temperature on the amp is typ warm/hot and will operate 24
hours a day in most of worlds countries without an additional cooling
fan.
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Ideal for radio
broadcasting up to 15 miles |
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14dB of RF Gain |
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Wideband 'No
Tune' from 88MHz to 108MHz |
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Input VSWR less
than 1.3 |
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Operates from
standard 13.8V power supply |
|
Rugged, 30:1 SWR
mismatch capability |
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Supply Current
only 3.5 to 4 amps |
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Very Stable up
to 30:1 SWR mismatch |
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RF Power and DC
Supply LED indicators |
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Compact size of
120mm x 100mm x 62mm |
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Heatsink Mounted
50 Ohm RF SO-239 Input and Output Sockets |
| PSU |
Drive |
Min O/P |
Typ O/P |
| 13.8v |
5W |
30W |
33W |
| 13.8v |
6.5W |
33W |
35W |
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No Low Pass
Filter Required, Spurious and Harmonic Emissions better than -50dB |
50W FM
POWER AMPLIFIER
'NO-TUNE' WIDEBAND
Continuous Reliable Power...... |
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This power amplifier is designed to be
used with our 12-Watt Variable power transmitter, or 12-Watt Power
amplifier. As with all our power amplifiers this unit is completely
broadband and does not require any tuning by the user.
Power supply requirements are easy to
fulfil, being 13.8V @ 6 Amps, which can be provided by a mains
power supply or vehicle battery. The front panel LEDs indicate at a
glance the presence of DC, RF input and RF output.
When RF input is absent the DC to the
Power amplifier shuts down automatically, conserving power. This robust
unit is protected from DC over-current using a high powered mosfet and
will never consume more than 5.75 Amps, regardless of drive level or SWR
mismatch, e.g. in the event of Antenna failure.
Thanks to the integrated fan cooling
system, this unit can run cool, even demanding applications, that
require 24/7 operation. On delivery the equipment is ready to plug in
and use with any suitable 50 Ohm antenna system such as our Vertical
5/8 Wave, Single
Dipole or Stacked
Dipole.
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Frequency
InputRF Power
Output RF Power
Spurious Emissions
SWR Input
SWR Ruggedness
RF I/O Connectors
Power Input
Physical Dimensions
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Broadband:
87.5 to 108 MHz
12-16 Watts
50 Watts minimum to 50 Ohm load
Better than -50 dB ref to carrier
Less than 1.5
Withstands 10:1 mismatch continuous
Withstands open circuit short duration
SO239 (or N-type on request)
13.8V DC Regulated 5.75A Continuous
150 x 150 x 75 mm |
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100W FM
POWER AMPLIFIER
'NO-TUNE' WIDEBAND
Continuous Reliable Power...... |
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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.
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