Ramsey Electronics RCA to XLR Converter R2XL1 Instruction Manual Download Page 18

R2XL1 

 18  

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. Without power applied the R2XL1 will pass through au-
dio, but not much. 
 
PROBLEM:  Sound is very badly distorted. 
SOLUTION: You may be using a high level source into the R2XL1 causing it 
to overload. Using this to convert from speaker lever to XLR is not recom-
mended but it is possible. Just turn down your volume a bit. Also check that 
you do not have the gain up all the way. Lastly, check to make sure your desti-
nation equipment is set up correctly. 
 
PROBLEM:  Audio seems noisy or picking up interference. 
SOLUTION: Here is where R6 and R12 come into play. The two 560 ohm 
(green-blue-brown) resistors that were left out of the normal construction steps 
may need to be installed. With long cable runs you are more likely to run into 
this type of problem. We left these parts out initially to help increase the over-
all frequency response of the unit and provide you with a much crisper sound. 
You may need to install them however to combat the effects of long cable 
runs. 
(Note to wired and tested customers: By default, these are installed on the 
wired and tested versions of the kit already.) 
 
PROBLEM:  It just wont work, it must be Ramsey’s fault!  
SOLUTION: Look in the warranty section for information how to contact us 
and to find out about our free services when it is our fault. We would recom-
mend however that you go through the assembly steps SLOWLY and check 
for potential mistakes. If that fails, give us a call and we’ll be happy to help. 

Summary of Contents for RCA to XLR Converter R2XL1

Page 1: ...n 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 switc...

Page 2: ...Thermometer LC1 Inductance Capacitance Meter RAMSEY AMATEUR RADIO KITS DDF1 Doppler Direction Finder HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW7 CW Keyer CPO3 Code Practice Oscil...

Page 3: ...t 7 Schematic Diagram 8 Parts Layout Diagram 9 Learn as You Build 10 Assembly 12 Using the R2XL1 15 Professional Audio Wiring 16 Custom Case Assembly 17 Troubleshooting 18 Warranty 19 KIT ASSEMBLY AND...

Page 4: ...tereo Mono switch It takes the au dio presented on the right input and sends it to both left and right XLR amplifi ers when pressed in This allows you to drive a professional stereo audio de vice from...

Page 5: ...ng resistors of R1 and R2 to set its gain Use the formula from before to figure out for yourself what the gain has been set for We ll con firm in a moment if you are correct The other opamp U1 A is co...

Page 6: ...omplish this we use a bridge rectifier consisting of D1 4 to take the AC input voltage and convert it to positive DC pulses This directly is too noisy for our application so C12 was added to smooth th...

Page 7: ...2 4 7 8 10 2 10K ohm resistors brown black orange R13 14 2 100 ohm resistors brown black brown R3 9 2 560 ohm resistors green blue brown R6 12 Capacitors 2 0 01 uF Ceramic capacitors marked 103 C9 10...

Page 8: ...R2XL1 8...

Page 9: ...R2XL1 9 R2XL1 PARTS LAYOUT DIAGRAM...

Page 10: ...leads and the pads simultaneously Apply the solder to the the pad when the junction is hot enough to melt the solder The finished joint should look like a drop of water on paper somewhat soaked in Mou...

Page 11: ...ure the part is mounted flush to the PC board unless otherwise noted 3 Orient it correctly follow the PC board drawing and the written directions for all parts especially when there s a right way and...

Page 12: ...ientation again 5 Install D6 another 1N4002 diode Orientation must be correct or we will get no negative supply Note how this is placed between two large capaci tors Imagine trying to install this aft...

Page 13: ...o change it now Just make sure that the side NOT marked negative is in the same side marked positive on the board 20 Install C8 another 10 uF electrolytic capacitor Again check polarity 21 Install R14...

Page 14: ...nical soundness 34 Install J6 our 2 5 mm AC power jack 35 Install C11 a 470 uF electrolytic capacitor Check orientation just in case you forgot 36 Install C12 another 470 uF electrolytic capacitor 37...

Page 15: ...as your primary audio gain control Since we built in a lot of gain it is too difficult to adjust on the fly Even worse there are two controls to tweak making it even harder to keep these at the same...

Page 16: ...ent standards dictate that XLR connectors should be wired as follows Ground pin 1 White Pin 2 Black Pin 3 Sometimes you will find red instead of white Both ends of the cable are wired in the same orde...

Page 17: ...ceive years worth of enjoyment using talking about and remembering the fun you had building your kit In short TAKE YOUR TIME when assembling the enclosure This is the part that you and your friends wi...

Page 18: ...terference SOLUTION Here is where R6 and R12 come into play The two 560 ohm green blue brown resistors that were left out of the normal construction steps may need to be installed With long cable runs...

Page 19: ...h be assured that the 1K ohm resistors are actually the missing 10 K parts Hum m m I guess the red band really does look orange Ramsey Electronics project kits are packed with pride in the USA If you...

Page 20: ...SEY ELECTRONICS INC 590 Fishers Station Drive Victor New York 14564 Phone 585 924 4560 Fax 585 924 4555 www ramseykits com REQUIRED TOOLS Soldering Iron Ramsey WLC100 Thin Rosin Core Solder Ramsey RTS...

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