D R Telephone Hybrid-1 Passive 9.5 Inch User Manual

: June 9, 2024
: D R

Telephone Hybrid-1 Passive 9.5 Inch

TELEPHONE HYBRID-1

USER MANUAL
V.1.08

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Dear Customer,
Thank you for choosing the Telephone Hybrid-1.
This time you are not faced with a huge manual because it is simply not necessary because of the natural recognition of all functions on the user interface. All functions are self-explanatory and you will certainly appreciate the ergonomics of this design. We are confident that you will be using the Telephone Hybrid-1 for many years to come, and wish you a lot of success. With kind regards,

Duco de Rijk md

D&R ELECTRONICA B.V. Rijnkade 15B 1382 GS WEESP-HOLLAND Netherlands Phone: 0294-418 014
Website: http://www.dnrbroadcast.com
E-mail: support@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 protection for your equipment and the public telephone lines, allowing for varying line signals and line conditions. Automatically canceling out the unwanted signal they also facilitate two-way communication down a single telephone line. Each hybrid has a telephone line connection, a handset connection and separate connectors for audio input and output from a broadcast mixer, or other professional audio source. A large proportion of D&R hybrids are used in radio and television broadcasting applications allowing external callers to be connected to the studio mixing console. Most of the other units are supplied to communication operations allowing extremely effective 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
Separation: more than 30db.

Front panel lay-out

C-BALANCE : 12 pole rotary switch to select the optimum side tone attenuation.
R-BALANCE : Internal potentiometer to adjust for optimum side tone attenuation.
CONNECT : Connect calls to the mixer and disconnect calls from the telephone line.
(without interrupting the phone line connection) 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.

USER MANUAL

The D&R Telephone Hybrid-1 is designed to create an easy connection 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 assemblies from your local phone shop.

Now the Hybrid is interfaced (fully balanced) between your telephone appliance and its connection 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-1 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
Screen
Tip
Ring

FUNCTION
Screen (ground)
Phase (hot)
Non-phase (cold)

CONNECTION
Audio ground
Audio +
Audio –

SPECIFICATIONS AUDIO

TO CLEAN FEED OUTPUT
Impedance : 10k Ohm, electronically balanced
Common mode rejection : >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 rejection : >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
Distortion : Less than 0.1% (0 dBu out)
Power supply : none (passive)
Power consumption : 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

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

AUDIO CONNECTIONS TELEPHONE HYBRID TO ANOTHER MIXER

In case you are not working with a D&R mixer the connections are pretty 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 connections 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

TELEPHONE CONNECTIONS TO TELEPHONE HYBRID

wall outlet from phone company

telephone set to dial and pick up calls

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

SETTING UP PROCEDURE

Connect a telephone appliance at the back of the Telephone Hybrid-1 (most left RJ11 connector) and connect the (wall) phone line RJ11 connector to the “wall”. Now dial the caller to whom you want to talk. If this connection 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 attenuated.

A practical start is to put the C adjust in its mid (12 o’clock) position and the R adjust also on its mid position. Carefully adjusting afterwards can be realized by slowly adjusting the R adjust for optimum attenuation. Try the R adjust for various C settings and choose the combination with the best attenuation. This is the basic setting for most of your calls, because the line balancing to your own telephone station has to be performed one time only, when no changes are made to the telephone system in your place. The maximum attenuation will be around 22 to 26 dB.

The function of the “Connect” switch is to connect the hybrid to the telephone line instead of the phone itself (which is now switched off). The led indicates that a connection has been made.

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Declaration of Conformity acc to ISO/IEC leidraad 22 en EN 45014

Name Manufacturer D&R Electronica b.v.
Address Manufacturer Rijnkade 15B, 1382 GS Weesp,
The Netherlands
declares that the product
Name product TELEPHONE HYBRID-1
Model number HYBRID
Product options All
Complies with the following product specifications:
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.
Additional 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 conditions.

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” section.

CAUTION

Never remove any panels, or open this equipment. No user serviceable parts
inside. Equipment power supply must be grounded at all times.
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 qualified 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 information is essential to know.
An electrical shock is caused by voltage and current, actually it is the current that causes the shock. In practice 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 effect of an electrical shock.

However, the severity of a shock primarily determined by the amount of current flowing 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 affect, when the current is high enough.

Current can also be fatal when it causes the chest muscles to contract and stop breathing. At what potential is current dangerous. Well the first feeling of current is a tingle 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 times more current than is necessary to kill. How does resistance affect the shock a person feels.
A typical resistance between one hand to the other in “dry” condition 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 situation in which current can easily flow.
Current will flow when there is a difference in ground potential between equipment on stage and in the P.A. system.

Please do check if there is any potential 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 potential 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 sometimes cures a system hum, it will create a very hazardous situation 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 isolation input/output transformers.

Replace fuses always with the same type and rating after the equipment has been turned off 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 mentioned information in mind when using

electrically powered equipment.

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″

Article code – Description – Quantity – Unit

10250345 Bridge rectifier 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 (12.7×11.3)gat 1.0000 st
10700975 Tape 12mm dun 20.0000 cm
10100371 Front 9.5″ Telephonehybrid/E 1.0000 st
10500084 Isolation 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 Pushbutton 3.3 black square 1.0000 st
10450010 Pushbutton CS12 Black 1.0000 st
10250387 Led 3mm red SLR-03A510-020 1.0000 st
20850531 PCB inserted Telephone hybrid 1.0000 st
10700790 Taptite M3x6 verzkop/pozidr/zw 4.0000 st
10800924 Packaging 9.5″ 1.0000 st
10800956 Foamblock 9.5″ 2.0000 st