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Ramsey Electronics RCA to XLR Converter R2XL1 Instruction Manual

Ramsey rca to xlr converter instruction manual
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Ramsey Electronics Model No.
Have you ever found yourself with two RCA outputs on your
audio equipment and you somehow have to connect them to
XLR inputs. While wiring RCA levels directly to XLR can work,
the levels will be way too low! So what do you do?
Here is the answer to your conversion dilemma. The R2XL1 not
only converts your connection types from RCA to XLR, it also
gives you the added advantage of independent channel gain
control for the proper levels!
•
Powered by a 12VAC wall power transformer for ground isolation.
•
Stereo/Mono switch so you can drive a stereo device with a mono
source.
•
Variable gain settings from 0.2 to 20.2 for full control with
independent left and right adjustments. Lets you get your levels
perfect!
•
Low noise design fully regulated for the best sound possible.
•
10 Hz to 50 kHz audio pass-band for clear, crisp sound.
•
Durable male XLR converters for heavy repeated use.
R2XL1 • 1
R2XL1

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Summary of Contents for Ramsey Electronics RCA to XLR Converter R2XL1

  • Page 1 Ramsey Electronics Model No. Have you ever found yourself with two RCA outputs on your audio equipment and you somehow have to connect them to XLR inputs. While wiring RCA levels directly to XLR can work, the levels will be way too low! So what do you do? Here is the answer to your conversion dilemma.
  • Page 2 R2XL1 KIT INSTRUCTION MANUAL Ramsey Electronics publication No. MR2XL1 Rev 1.3 COPYRIGHT 2001 by Ramsey Electronics, Inc. 590 Fishers Station Drive, Victor, New York 14564. All rights reserved. No portion of this publication may be copied or duplicated without the written permission of Ramsey Electronics, Inc.

  • Page 3: Table Of Contents

    Assembly ... 12 Using the R2XL1 ... 15 Professional Audio Wiring ... 16 Custom Case Assembly ... 17 Troubleshooting ... 18 Warranty ... 19 RAMSEY ELECTRONICS, INC. 590 Fishers Station Drive Victor, New York 14564 Phone (585) 924-4560 Fax (585) 924-4555 www.ramseykits.com...

  • Page 4: Introduction

    INTRODUCTION Welcome to another quality kit brought to you by Ramsey Electronics, Inc. This kit was designed to allow you to connect consumer audio devices to pro- fessional equipment with as little hassle as possible. You would think that a product like this was readily available, but it isn’t.
  • Page 5 The next component in line is R4. This 1K resistor in combination with R3 and R5 sets the gain of the first inverting opamp stage (U1:C). An inverting opamp will take the signal presented on its input and flip the polarity of the sig- nal on its output giving you the inverse value of the original.
  • Page 6 determine that the total gain of the circuit is 20.2 by multiplying the series gain values together (10.1 x 2). This gives us plenty of control to get our low level RCA signals up to the higher XLR requirements. This may be more than you ever wanted to know about a preamplifier de- sign, but we aren’t done yet! The output of the two opamps in the last stage are sent through another set of coupling capacitors that removes any DC com- ponent we may have accidentally added when we amplified the audio.

  • Page 7: Parts List

    RAMSEY R2XL1 PARTS LIST Semiconductors 6 1N4002 Rectifier Diodes (D1, 2, 3, 4, 5, 6) 1 78L12 +12V Voltage Regulator (VR1) 1 79L12 –12V Voltage Regulator (VR2) 2 LF347N Quad FET opamps (U1, 2) Resistors 2 10K ohm potentiometers (R5, 11) 6 1K ohm resistors (brown-black-red) (R1, 2, 4, 7, 8, 10) 2 10K ohm resistors (brown-black-orange) (R13, 14) 2 100 ohm resistors (brown-black-brown) (R3, 9)

  • Page 8: Schematic Diagram

    R2XL1 • 8...

  • Page 9: Parts Layout Diagram

    R2XL1 PARTS LAYOUT DIAGRAM R2XL1 • 9...

  • Page 10: Learn As You Build

    RAMSEY “LEARN-AS-YOU-BUILD” ASSEMBLY STRATEGY Be sure to read through all of the steps and check the boxes as you go along to be sure you don't miss any. Although you may be in a hurry to see results, before you switch on the power check all wiring and capacitors for proper orientation.
  • Page 11 We sincerely hope you put this kit together by carefully following the direc- tions. This project will not work as well as you wished if you just slap it together without following good assembly techniques and all of the instructions. No matter how clear we may think our manual is, if you have any questions give us a call at the factory instead of jumping to conclusions.

  • Page 12: Assembly

    R2XL1 ASSEMBLY We will start with the lowest profile components first and then work our way up to the largest. We do this to make assembly much easier since fitting a short component between two big ones can be a real pain. 1.
  • Page 13 14. Install R1, a 1K ohm resistor (brown-black-red). 15. Install R2, a 1K ohm resistor (brown-black-red). 16. Install R3, a 100 ohm resistor (brown-black-brown). 17. Install R4, a 1K ohm resistor (brown-black-red). 18. Install U1, the other LF347 quad opamp. Again make sure you orient it correctly! It is in the same orientation as the last part.
  • Page 14 30. Install VR2, the 79L12 negative –12V regulator. Again make sure and install it with the orientation shown on the diagram. 31. Now it is time to install the larger components. We will begin with the jacks. Install J2, one of the PC mounted XLR connectors. You must be careful when installing these parts that all the leads go in the respective holes.

  • Page 15: Using The R2Xl1

    At this point it is time to go back through and check your assembly methods for: • Diode orientation. Make sure the cathode and (the line) is in the same ori- entation as shown on the assembly diagram. • Electrolytic capacitor orientation. Make sure the negative side of the ca- pacitors are not in the positively marked holes! •...

  • Page 16: Professional Audio Wiring

    PROFESSIONAL AUDIO WIRING You would think it would be easy to connect professional audio equipment together, but unfortunately it’s not. There can be all sorts of issues that come up; usually it is AC line hum in your equipment you have to deal with. This is normally caused by ground loops in the equipment.
  • Page 17 If neither of these methods works and you have a source of RF nearby like a transmitter, it may be RF causing interference. This is a more difficult problem to fix, but not impossible. The first thing to do is move equipment away from the RF source.

  • Page 18: Troubleshooting

    TROUBLESHOOTING PROBLEM: I have no audio gain, in fact it only attenuates! SOLUTION: You will need a voltmeter to check your power. Look at pin 4 of U1 for +12 volts, and pin 11 for –12 volts. It may not be exactly that voltage, but +- 0.5 volts if fine.

  • Page 19: Warranty

    But on rare occasions a sour component can slip through. All our kit parts carry the Ramsey Electronics Warranty that they are free from defects for a full ninety (90) days from the date of purchase. Defective parts will be replaced promptly at our expense. If you suspect any part to be defective, please mail it to our factory for testing and replacement.

  • Page 20: Victor, New York

    Desoldering Braid Ramsey RTS08 • Digital Multimeter Ramsey M133 Price: $5.00 Ramsey Publication No. MR2XL1 Assembly and Instruction manual for: RAMSEY ELECTRONICS, INC. 590 Fishers Station Drive Victor, New York 14564 Phone (585) 924-4560 Fax (585) 924-4555 www.ramseykits.com Quick Reference Page Guide Introduction ...

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