TELEPHONE
HYBRID-1
USER
MANUAL
V.1.06
page-1
Dear Customer,
Thank you for choosing the Telephone Hybrid-1.
This me you are not faced with a huge manual because it is simply not necessary because of the natural recognion of all funcons on the user interface.
All funcons are self-explanatory and you will certainly appreciate the ergonomics of this design.
We are condent that you will be using the Telephone Hybrid-1 for many years to come, and wish you a lot of suc-
cess.
With kind regards,
Duco de Rijk
md
D&R ELECTRONICA B.V.
Rijnkade 15B
1382 GS WEESP-HOLLAND
The Netherlands
Phone: 0294-418 014
Fax: 0294-416 987
Website: hp://www.d-r.nl
E-mail: mail@d-r.nl
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What is a Telephone hybrid?
Telephone hybrids provide the interface between professional audio equipment and the public telephone network.
They provide protecon for your equipment and the public telephone lines, allowing for varying line signals and line
condions. Automacally canceling out the unwanted signal they also facilitate two-way communicaon down a
single telephone line.
Each hybrid has a telephone line connecon, a handset connecon and separate connectors for audio input and
output from a broadcast mixer, or other professional audio source.
A large proporon of D&R hybrids are used in radio and television broadcasng applicaons allowing external callers
to be connected to the studio mixing console. Most of the other units are supplied to communicaon operaons allowing extremely eecve conversion between 4-wire audio circuits and standard telephone lines.
Specs:
Output: balanced mic level - 30db.
Input: Line level 0 dBu balanced.
R/C balance: fully adjustable
Separaon: more than 30db.
Front panel lay-out
C-BALANCE : 12 pole rotary switch to select the opmum side tone aenuaon.
R-BALANCE : Internal potenometer to adjust for opmum side tone aenuaon.
TO CALLER : Switch to connect the audio in (connected to cleanfeed output jack on the back of the unit)
to the caller.
CONNECT : Connect calls to the mixer and disconnect calls from the telephone line.
(without interrupng the phone line connecon)
Back panel lay-out
PHONE : RJ-11 connector to connect with a handset.
LINE (wall) : RJ-11 connector to connect with the public telephone network.
TO MIC INPUT : Stereo jack output to be connected to Mic input of the mixer.
TO CLEANFEED OUTPUT : Stereo jack input to be connected to a Mix Minus/Clean feed (N-1)output of the
mixer.
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USER MANUAL
The D&R Telephone Hybrid-1 is designed to create an easy connecon between the public telephone line and your
studio equipment.
The Hybrid has to be inserted between your telephone and the telephone line. Connect the two wires of the telephone line’s wall unit to the RJ-11 connector labelled LINE (wall) and connect the telephone appliance itself to the
Hybrid’s phone output on the RJ-11 connector labelled PHONE. This can be done with standard available cable as-
semblies from your local phone shop.
Now the Hybrid is interfaced (fully balanced) between your telephone appliance and its connecon to the outside
world. The hybrid can now split the send and return signals.
Now connect the hybrid’s balanced audio input labelled TO CLEANFEED OUTPUT to a (preferable) balanced output
of around +4dBu. This output has to be the mix of all signals except the signal coming from the hybrid itself to avoid
feedback.
An Aux. output on your mixer will do as well as long as you keep the Aux. send of the channel you return the phone
signal on closed (all other Aux. sends need to be open), or in broadcast mixers a clean-feed is the best.
The Hybrid-1 stereo jack connector labelled TO MIC INPUT has to be connected to a Mic level input of your mixing
console.
NOTE: The output of the Hybrid has to be connected to a Mic input of the mixing console, because the outgoing
level is very low because of the passive circuitry inside the Hybrid.
WIRING SCHEME
PHONE : RJ-11 connector to connect with a handset.
LINE (wall) : RJ-11 connector to connect with the public telephone network.
TO MIC INPUT : Stereo jack output to be connected to mic input of the mixer.
TO CLEANFEED OUTPUT : Stereo jack input to be connected to Mix Minus/Clean feed (N-1)output of the mixer.
______________________________________________________________________________________________
WIRING OF BOTH PHONE AND LINE RJ-11 CONNECTORS
PHONE/WALL RJ-11 FUNCTION CONNECTION
Pin 1: n.c.
Pin 2 A (telephone line) In/out
Pin 3 B (telephone line) In/out
Pin 4 n.c.
______________________________________________________________________________________________
WIRING OF AUDIO IN AND OUTPUTS
STEREO JACK TO MIC INPUT FUNCTION CONNECTION
Screen Screen (ground) Audio ground
Tip Phase (hot) Audio +
Ring Non-phase (cold) Audio -
______________________________________________________________________________________________
STEREO JACK TO Clean feed output FUNCTION CONNECTION
Screen Screen (ground) Audio ground
Tip Phase (hot) Audio +
Ring Non-phase (cold) Audio -
______________________________________________________________________________________________
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SPECIFICATIONS AUDIO
TO CLEAN FEED OUTPUT
Impedance : 10k Ohm, electronically balanced
Common mode rejecon : >30dB
Maximum input level : +26dBu
Nominal input level : +4 dBu
Frequency response : 20Hz – 15kHz
Connectors : STEREO JACK
TO MIC INPUT
Impedance : < 50 Ohm, electronically balanced
Common mode rejecon : >30dB
Maximum output level : -20dBu
Nominal output level : -30dBu
Bandwidth to telephone line : 250Hz – 4kHz, -3dB ref 1 kHz
Telephone line impedance : Nominally 600 ohm
Telephone line impedance range : 300 ohm to 1500 ohm
Connectors : STEREO JACK
GENERAL
Distoron : Less than 0.1% (0 dBu out)
Power supply : none (passive)
Power consumpon : none
Dimensions : 1 HE front panel: 482 x 44 mm
: Frame: 240 x 44 x 175 mm (width x height x depth)
Weight : 1.5 kg net including packing
PHONE CONNECTIONS (POT)
PHONE : RJ-11 phone connectors
WALL (line) : RJ-11 phone connectors
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AUDIO CONNECTIONS TELEPHONE HYBRID TO AIRMATE
From Cinch connector Connect
of the Clean feed output “To Clean feed output”
of the AIRMATE of the HYBRID-1
(Cleanfeed output could also be an AUX send output)
______________________________________________________________________________________________
Connect to Connect to
MIC INPUT “ TO MIC INPUT”
of your mixer of HYBRID-1
_____________________________________________________________________________________________
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AUDIO CONNECTIONS TELEPHONE HYBRID TO
ANOTHER MIXER
In case you are not working with a D&R mixer the connecons are prey much the same.
1. Clean feed output or AUX output to the mixer must be connected to ’’TO CLEAN FEED OUTPUT” of the Hybrid.
2. Mic input of the mixer must be connected to “TO MIC INPUT” of the Hybrid.
As the Hybrid-1 is a passive unit signal loss is to be expected so drive it with a maximum signal and connect
the return telephone signal always to a mic input of your mixer.!
Above you see the XLR connecons if your mixer has balanced or unbalanced XLR type of connectors on the mixer
side. In case you have an unbalanced clean feed or you use an AUX output be sure that pin-3 is also grounded on the
XLR side of the cable. This is for both male and female XLR connectors.
The pinning number is the same on both XLR type of connectors.
See mirrored pinning numbers in Male and Female XLR’s below
Pin1= ground
Pin2 =Hot
Pin3=Cold
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TELEPHONE CONNECTIONS TO TELEPHONE HYBRID
wall outlet from phone company
RJ11 type of cable to do the wiring in
between telephone set and the mixer
and between the wall connector
outlet from phone company and the
Hybrid-1
telephone set to dial and pick up calls
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SETTING UP PROCEDURE
Connect a telephone appliance at the back of the Telephone Hybrid-1 (most le RJ11 connector) and connect the
(wall) phone line RJ11 connector to the “wall”. Push the "to caller" switch to connect the audio to the caller and
leave the "connect" switch in the up posion for the moment.
Now dial the caller to whom you want to talk.
If this connecon is made you can connect the caller to the mixing console by pushing the connect switch.
Now listen by means of a PFL (CUE) switch on your mixer to the caller and adjust, while talking, the C and R ADJUST
(balance) so that the outgoing signal (your voice) is best aenuated.
A praccal start is to put the C adjust in its mid (12 o’clock) posion and the R adjust also on its mid posion.
Carefully adjusng aerwards can be realized by slowly adjusng the R adjust for opmum aenuaon.
Try the R adjust for various C sengs and choose the combinaon with the best aenuaon.
This is the basic seng for most of your calls, because the line balancing to your own telephone staon has to be
performed one me only, when no changes are made to the telephone system in your place.
The maximum aenuaon will be around 22 to 26 dB.
The funcon of the "Connect" switch is to connect the hybrid to the telephone line instead of the phone itself
(which is now switched o). The led indicates that a connecon has been made.
The funcon "to caller” is to connect calls to the mixer (pushed down) and disconnect audio from the telephone
line, without interrupng the call, for private discussions (to caller in its up posion).
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Declaraon of Conformity
acc to ISO/IEC leidraad 22 en EN 45014
Name Manufacturer D&R Electronica Weesp b.v.
Address Manufacturer Rijnkade 15B, 1382 GS Weesp,
The Netherlands
declares that the product
Name product TELEPHONE HYBRID-1
Model number HYBRID
Product opons All
Complies with the following product specicaons:
Security EN 60950: 1988 +A1, A2
EMC: CISPR-22: 1985 / EN 55022: 1988 klasse B (*)
EN 50082-1: 1992
IEC 801-2:1991 / prEN 55024-2:1992 - 3kV CD, 8kV AD
IEC 801-3:1984 / prEN 55024-3:1991 - 3 V/m
IEC 801-4:1988 / prEN 55024-4:1992 - 0.5kV signal cables,
1 kV power cables.
Addional info:
The product complies herewith to the following rules
Low voltage 73 / 23 / EEG
EMC-rules 89 / 336 / EEG.
(*) The product has been tested in normal users condions.
page-9
PRODUCT SAFETY
This product is manufactured with the highest standards and is double checked
in our quality control department for reliability in the "HIGH VOLTAGE" secon.
CAUTION
Never remove any panels, or open this equipment. No user serviceable parts
inside. Equipment power supply must be grounded at all mes.
Only use this product as described, in user manual or brochure.
Do not operate this equipment in high humidity or expose it to water or other
liquids. Check the AC power supply cable to assure secure contact.
Have your equipment checked yearly by a qualied dealer service center.
Hazardous electrical shock can be avoided by carefully following the above
rules.
PLEASE READ THE FOLLOWING INFORMATION
Especially in sound equipment on stage the following informaon is essenal to know.
An electrical shock is caused by voltage and current, actually it is the current that causes the shock. In pracce the
higher the voltage the higher the current will be and the higher the shock. But there is another thing to consider and
it is resistance.
When the resistance in Ohms is high between two poles, the current will be low and vice versa. All three of these;
voltage, current. and resistance are important in determining the eect of an electrical shock.
However, the severity of a shock primarily determined by the amount of current owing through a person.
A person can feel a shock because the muscles in a body respond to electrical current and because the heart is a
muscle it can aect, when the current is high enough.
Current can also be fatal when it causes the chest muscles to contract and stop breathing. At what potenal is current dangerous. Well the rst feeling of current is a ngle at 0.001 Amp of current. The current between 0.1 Amp
and 0.2 Amp is fatal.
Imagine that your home fuses of 20 Amp can handle 200 mes more current than is necessary to kill. How does
resistance aect the shock a person feels.
A typical resistance between one hand to the other in "dry" condion could well over
100,000 Ohm.
If you are playing on stage your body is perspiring extensively and your body resistance is lowered by more than
50%. This is a situaon in which current can easily ow.
Current will ow when there is a dierence in ground potenal between equipment on stage and in the P.A. system.
Please do check if there is any potenal between the housing of the mikes and the guitar synth amps, which will be
linked by your body on stage. Imagine, a guitar in your hand and your lips close to the mike! A ground potenal difference of above 10 volts is not unusual, in improperly wired buildings it can possibly be as high as 240 volts.
Although removing the ground wire somemes cures a system hum, it will create a very hazardous situaon for the
performing musician. Always earth all your equipment by the grounding pin in your mains plug.
Hum loops should be only cured by proper wiring and isolaon input/output transformers.
Replace fuses always with the same type and rang aer the equipment has been turned o and unplugged.
If the fuse blows again you have an equipment failure, do not use it again and return it to your dealer for repair.
And last but not least be careful not to touch a person being shocked as you, yourself could also be shocked.
Once removed from the shock, have someone send for medical help immediately
Always keep the above menoned informaon in mind when using
electrically powered equipment.
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TELEPHONE HYBRID SERVICE MANUAL
Date: 07-12-2011 [ [16:17] B I L L O F M A T E R I A L
D & R Electronica Weesp BV ( SERVICE-MANUAL )
Comp: 60898508 Telephone Hybrid-1g 9.5"
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Arcle code Descripon Quanty Unit
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10250345 Bridge recer B80C1000 (round) 1.0000 st
10400234 Condensator ker 680p R2.5 1.0000 st
10401249 Condensator poly 3n3 R5.0 1.0000 st
10401251 Condensator poly 6n8 R5.0 1.0000 st
10400278 Condensator poly 8n2 R5.0 1.0000 st
10400280 Elco 2.2uF / 50V radiaal R5.0 1.0000 st
10400293 Elco 220uF / 63V radiaal R5.0 2.0000 st
10400281 Elco 4.7uF / 50V radiaal R5.0 1.0000 st
10600432 Jack chassis break 2.0000 st
10600445 Conn Chass 805-D 4p (RJ11) 2.000 st
10300164 Trimmer 1KA lin 1.0000 st
10200530 PCB Telephone-hybrid-G 1.0000 st
10550400 Switch Alps 2p-ns (2 x om) 1.0000 st
10550963 Switch Alps 4p-sh (4 x om) 1.0000 st
10550195 Switch NFDR16H Nikkai 1.0000 st
10950018 Transformer LM-NP-1003-B (PTT line) 2.0000 st
10350517 Resistor 0E 5% 1/4W 1.0000 st
10350718 Resistor 120E 5% 1/4W 1.0000 st
10350792 Resistor 604E 1% 1/4W 2.0000 st
10350728 Resistor 820E 5% 1/4W 1.0000 st
10250351 Zenerdiode 5V6 / 400mW 2.0000 st
10700631 Cap 11.0mm rond zwart 1.0000 st
10700665 cap 14.7mm (12.7x11.3)gat 1.0000 st
10700975 Tape 12mm dun 20.0000 cm
10100371 Front 9.5" Telephonehybrid/E 1.0000 st
10500084 Isolaon panel 9.5" randapp.PVC 1.000 st
10600436 Jack Nut 4.0000 st
10700685 Washer M 10 potmeter dun 2.0000 st
10150093 Frame 9.5" 1HE version D 1.0000 st
10450251 Knob Pushbuon 3.3 black square 1.0000 st
10450010 Pushbuon CS12 Black 1.0000 st
10250387 Led 3mm red SLR-03A510-020 1.0000 st
20850531 PCB inserted Telephone hybrid 1.0000 st
10700790 Tapte M3x6 verzkop/pozidr/zw 4.0000 st
10800924 Packaging 9.5" 1.0000 st
10800956 Foamblock 9.5" 2.0000 st
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