Radial Engineering Space H 500 User's Guide
®
True to the Music
Space Heater
500 Series Module
Tube Drive
500
™
Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam, British Columbia, Canada, V3C 5M5
Tel: 604-942-1001 • Fax: 604-942-1010 • Email: info@radialeng.com
www.radialeng.com
User Guide
Radial® Space Heater 500™ User Guide
Table of Contents Page
Warning .......................................................................... 1
Feature set ..................................................................... 2
Overview ........................................................................ 3
Making connections ....................................................... 4
The control panel ........................................................... 5
Using the lters .............................................................. 6
Using the Space Heater 500 .......................................... 7
Applications .................................................................... 8
Block diagram and specications ................................... 9
Warranty ............................................................Back cover
Congratulations… Thank you for joining the growing
number of Radial 500 series module users. The Space
Heater 500™ will be a truly unique and useful addition
to your recording studio setup. Although its standard
operation and connections are no different than any
other 500 series module, we recommend that you take a
few minutes to read through this manual and familiarize
yourself with the design and controls.
Should you have any questions on an application not
covered in this manual, we invite you to log onto the Radial
Engineering website at radialeng.com to check the Space
Heater 500’s FAQ section for the latest updates. If you still
do not nd what you are looking for, feel free to send us an
email at info@radialeng.com.
Now lets warm things up and embrace the distortion!
True to the Music
!
The Space Heater 500™ is a high-voltage tube device designed for professional
use only. Although preventative safety measures have been designed into Radial
500 series products, we strictly advise against hot-swapping modules or plugging
and unplugging them while your Workhorse or other 500 series rack is powered.
Hot-swapping can cause connection shorts at the card-edge connector that could
damage other equipment. This also greatly reduces the life span of the contacts.
Damage due to hot-swapping is not covered under warranty.
The 12AX7 tube inside the Space Heater 500™ can be removed and replaced as
required. Opening the unit should only be performed by a qualied technician familiar
with 500 Series modules or by those experienced with replacing tubes.
Warning Notice to User!
®
Radial Engineering Ltd.
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Space Heater 500™ Module
®
FEATURE SET
1. DRIVE: Controls the input level of the tube circuit.
Increase the drive to allow more signal to enter the
tube adding saturation and warmth.
2. HEAT: 3-position switch selects between 35, 70 and
140 volts at the tube. At 35V the tube is starved for
voltage creating more distortion.
3. LEVEL: Controls overall output level. Depending on
the amount of drive added, the level control can be
adjusted to achieve an optimal signal level.
4. HI-CUT: The low-pass lter is used to tame
excessive harmonics when using heavy distortion.
5. EQ: Assigns the lters pre or post tube circuit, or
turns them off completely.
6. LOW-CUT: Variable high-pass lter from 5Hz to
500Hz used for reducing unwanted low frequencies.
7. ON: Engage or bypass the circuit completely.
8. OMNIPORT: Available when used with the
Radial Workhorse, the Omniport accesses a hi-Z
instrument input.
9. POWER ASSIGN SWITCH: Lets you toggle the
input supply from the positive or negative rail. This
enables multiple Space Heaters to be used together
without power sag.
10. 12AX7 TUBE: The Space Heater 500 employs a
select low-noise 12AX7 tube with a non-radiating
140V charge pump to deliver the performance of a
high voltage tube preamp.
True to the Music
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Radial Engineering Ltd.
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Space Heater 500™ Module
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