Radial Engineering JD7 Injector Owner's Manual

R

adial JD7 Injector

G

uitarSignalDistribution andRoutingSyste

O

wner’s

m

anual

m

Radial Engineering is a division of JP Cabletek Electronics Ltd.

Table of Contents: Page

JD•7 Owner’s manual

Concept & introduction.........................................................

Power connections, connecting guitars and amps ..................

Input section, ‘Drag’ control...................................................

Output section, effects loops.................................................

Rear panel, balanced low Z input & output, labeling ...............

Remixing description and diagram.........................................

JD•7 questions and answers .......... ......................................

JD•7 specifications & dimensions ..........................................

JD•7 Setup Saver....................................... ..........Back Cover

1.

2.

3.

4.

5.

6.

7.

8.
.

Caution must be used when connect ing electronic equipment to the JD7. The JD 7 brid ges all electronic
equipment connected to it so faulty wiring or i ncorrect grounding of any of the equipment may cause a
shock hazard to be present and/or damage to the JD7 or other connected equipment. Because grounding
schemes differ between manufacturers, it is important to check for correct polarity, in particular with older
amplifiers using 2-prong ungrounded A/C cords. If the polarity is reversed on an ungrounded amplifier
there may be a potential of 120V pr esent between the amp chassis and ground. Radial Engineering takes
no responsibility for this or how the JD7 is connected or used. It is the users full responsibility to ensure that
proper electrical polarity is maintained on all equipment connected to the JD7 and tha t proper building
electrical codes have been followed wherever the JD7 is being used.

To reduce opportunity for shock hazard or damage to th e JD7 or connected equipment, plug t he ¼”
connectors into the amplifiers first and then to the JD7. This is especially important when using old
amplifiers that do not have 3-prong plugs as the poss ibility exists to touch the chassis ground wi th the
connector plug tip when the plug is inserted into the jack.

Cautions for amplifiers with ungrounded 2-prong A/C cords:

Before connecting any input to an
ungrounded amplifier, power the amp up and listen to the residual hum. If the amp has a two-position
ground polarity reverse switch, set the switch in the posi tion that produces the least residual hum from the
speakers. If there is no polarity switch, reverse the A/C plug at the outl et to find the least residual hum.

To ensure an u ngrounded amplifier does not present a shock hazard:

Test for voltage potential by
connecting a voltmeter between the amplifier chassis and the JD7 chassis. If voltage is present, reverse
the amplifier’s A/C supply polarity and test again.

Note that due to this potential problem, damage to the JD7 or other c onnected equipment caused by
improper A/C polarity is not covered under warranty.

RADIAL LIMITED THREE YEAR WARRANTY

Radial Engineering - a division of JP Cabletek Electronics Ltd. ("Radial") warrants this product to be free from defectsin material and
workmanship to the original owner and will remedy any such defects free of charge according to the terms of this warranty.Radial will repair
or replace (at its option) any defective component(s) of this product (excluding finish and wear and tear on components under normal use)
for a period of three (3) years from the original date of purchase. In the event that a particular product is no longer available, Radial reserves
the right to replace the product with a similar product of equal or greater value. To make a request or claim under this limited warranty, the
productmustbereturned prepaid in the original shipping container (or equivalent) to Radial or to an authorized Radial repaircentre and you
must assume the risk of loss or damage. A copy of the original invoice showing dateof purchase and the dealer name must accompany any
request for work to be performed under this limited warranty. This limited warranty shall not apply if the product has been damaged due to
abuse, misuse,misapplication, accident or as a result of service ofmodification by anyother than an authorized Radial repair centre.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DESCRIBED ABOVE. NO
WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY
PERIOD DESCRIBED ABOVE OF THREEYEARS.

RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL OR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF
LOSS ARISING FROM THE USE OF THIS PRODUCT. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY
ALSO HAVEOTHER RIGHTS,WHICH MAY VARY, FROM STATE/PROVINCE TO STATE/PROVINCE.

Rad ial Engineering 1638 Kebet Way, Port Coqu itlam BC Canada V3C 5W9 tel : [phone] · fax: [phone]
email: [e-mail] web : www.radialeng.com Radial Engineerin g is a division of JP Cabletek Electronics Ltd.

Introduction

Concept: Gaining a CreativeEdge . . .

Congratulations on your purchase of the Radial JD7 guitar distribution and routing amplifier.
You now own one of the most powerful creative tools ever devised for th e professional
guitar player. We are confident that you will quickly go well beyond the scope of this
manual as you develop new and creativewaystousethisdevice!

As you read this, keep one thing in mind: The Radial JD7 Injector was
designed to enhance the creative spiritduring the recording process.
Experiment and have fun! Start with simple set-ups and
combinations before you go hog-wild. You will quickly
find that small changes such as reversing the polarity
to one amp versus another will dramatically change
the wayyour guitar sitsin a mix.

As your configurations become more complex, try
different combinations and keep track of what you
liked with the handy scribble page at the back of this
manual. We have found that keeping track of great sounds is
a lot easier if you remember how the equipment was set up and
where the dials were set.

Now go out there andplug in, close your eyesand enjoy!

Introduction:

The Radial JD 7 is a guitar signal
distribution amplifier. It has been
optimized to retain the original sound of
the instrument so that the connection is
the same as if the guitar was plugged
directly into the amp. The JD7 is also a
‘unity gain’ device. This means what
you put in - you get out... only more!

Once the guitar is connected, you may
route the guitar signal to one or as many
of the outputs as desired. A myriad of
signal paths and combinations are
av ailable . F o r add ed flexibility,
switchable effect device routing is
available, as is direct-to-record output
for redistribution of the recorded clean
guitar signal to the amplifiers for r e­mixing during the record production
stage.

The JD7 is not limited to electric guitars;
it may also be used with instruments
such as bass, keyboards, acoustic guitars
or any other signal. The operative idea
with the JD7 is to 'expand the creative
process' by taking full advantage of the
equipmentyou alreadyown.

JD7 BlockDiagra

m

1

Connections

Connecting the power:

For lowestinsertion noise keep the power supply unit away from any audio connections.Plug the power adapter cord into the
rear 9VDC input on the rear. The JD7 does not have a power on-off switch for two reasons: (a) the Class-A circuit will sound
better once the unit has gained electrical and thermalstability, and (b) on-off transientscan devastate speakers down the line if
'popped' by switchingon at full volume. Alwaysswitch amplifiers on last.

Power supply and DC supply lock: The JD7's power supply input is outfitted with a handy cable lock. Simply unscrew the
lock, pass the DC supply cable through the hole and tighten. This will keep the DC supply jack safely in place and prevent
accidental unplugging.

Connecting guitars and amplifiers:

Make sure all of the channel output switches are set to the 'off' position (LED light out) before making connections. Turn all
guitar amplifier levels down to eliminate connection 'popping'. Caution must be observed when connecting older and non­grounded (2-prong) amplifiers. Please read the notice at the beginning of this manual regarding equipment
connection.

CAUTION

Making connections:
A typical routing example.

2