Etec PA1001 User manual
PA1001
Power amplifier for driving an underwater loudspeaker and a high input impedance hydrophone
amplifier in a suitcase with buildin batteries
This amplifier is designed for driving an underwater piezoceramic loudspeaker like the
Reson type TC2130 or eq.
The mplifier is capable of driving 90volt peak to peak of signal power up to 300kHz in a capacitive load
of 10nF maximum with a caracteristic impedance of 100ohm.
It also contains a high input impedance hydrophone amplifier and an envelope or "click" detector for
monitoring, recording or listening.
The amplifier is supplied in a watertight suitcase with 4pcs.12volt batteries.
Operating time is appr.12hours on a set of fully charged batteries.
This amplifier is a stand alone unit with a power amplifier and a hydrophone reciever amplifier complete
with buildin envelope or "click" detector and batteries and charger supplied all together in a watertight
suitcase.
High impedance preamplifier input
suitable for piezoceramic transducers
like the Reson type TC4033 or eq.
See also www.RESON.com
Input impedance >1G and < 10pF
Gain : 0 to 30dB / Bandwidth : 10Hz to 1MHz -6dB
Relativ input noise : <3uVr s @ 0dBgain
Relativ input noise : <2uVr s @ 20dBgain
Noise easure bandwidth : 500Hz to 8KHz
Cable lenght reco ended ax : 20 eter
10mAmp Loop for hydrophones with buildin current loop prea plifier like the etec 602 type.
This is a two-wire low i pedance trans ission line carrying both the power supply for the prea plifier
and the hydrophone returnsignal on the sa e two wires.
There are no drawback with this configuration co pared to conventional a plifier technology.
Distance ax : 100 eter cable RG58 style or eq.
Balanced input with buildin 48Volt phanto
power supply. Designed for connection of
standard studio icrophones with 3pole XLR
connectors.
It will drive the DPA icrophones serie 4000
studio icrophones as well as the their 8011
hydrophone.
These inputs ay also be used singlesided :
XLR pin1: GND=0V
XLR pin2: Positive input
XLR pin3: Negative input
See also www.DPAmicrophones.com
Input amplifier and Gain selector used to switch between the tree different input a plifiers. Gain is
privided here only with the prea plifier selection.
Bandwidth : 10Hz to 1MHz (700KHz @ 30dB gain)
Input SeaWa e filter 1.st order 6dB/octave / 10 Hz filter is 2.st order 12dB/octave.
Liniar input amplifier offering extra gain 10Hz to 1MHz.
Hydrophone Output signal presenting input selection. Used for recordings.
Detector Output signal sa e as the hydrophone signal but led through an envelope detector for audible
detection of sonar signals in the frequency range fro 20KHz to 700KHz.
Used for recordings.
Left and Right Line Inputs for external connection to the output power a plifiers.
Used for playback to the loudspeaker(s).
Source selector to switch between internal and external signal sources.
The output fro this point is led on to the Line output ter inals for recordings
and to the output level controls and thus to the power a plifiers.
It is not a legal situation to input select a hydrophone placed in the sa e edia as an underwater
loudspeaker and turn up the volu e.
This will cause oscillation at a very high frequency.
Output Le el Left and Right for controlling the level for the output power a plifiers.
Left and Right Line Outputs presenting whatever selected on the inputs.
Used for recordings.
Output Selector
switches between nor al two channel Stereo and the Bridge configuration.
OFF position utes the output but do not switch off the power to the a plifier.
Power output terminals
for the connection of an underwater loudspeaker
like the Reson TC2130 or eq. Nominel load
Impedance : 100 ohm or max. 10nF
O tp t power level is +/- 24Volt peak in the
STEREO position OR +/- 48Volt peak in the
BRIDGE position. With the BRIDGE config ration
the load m st be connected to the left and right
RED terminals th s forming a balanced floating
o tp t. Cable screen may be connected to any of
the black terminals which are 0Volt reference and
chassis and center of the batteries.
Right channel power output terminals. Same as the above.
Specifications are the same as for the Left channel o tp t.
In Bridge position the Right o tp t is inverted.
Power bandwidth is 10Hz to 300KHz. C rrent cons mption
is appr. 0.1Amp stand by when switched on b t witho t signal thro gh.
ON/OFF switch on the right side of box
REMEMBER to switch off when not in se.
In Stereo position the o tp ts are in phase.
The power o tp ts may also drive a set of conventional lo dspeakers at 4 or 8 ohm.
General information regarding BA ERIES :
4 pcs Panasonic type LC-R123R4PG or eq. / 12Volt 3.4Ah
Size : H x W x L = 60 x 67 x 134mm
External charger : 60Volt 0.2Amp. / Chargetime : 24 Ho rs max.
Disconnect batteries when not in se for periods longer than 4 weeks
Keep cool when not in se. Recycle when worn o t.
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