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MX-5 Page 21 

The Ramsey Kit Warranty

 

Please read carefully BEFORE calling or writing in about your kit. Most problems can be 
solved without contacting the factory.

 

Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! 
All Ramsey kits will work if assembled properly. The very fact that your kit includes this new manual 
is your assurance that a team of knowledgeable people have field-tested several "copies" of this kit 
straight from the Ramsey Inventory. If you need help, please read through your manual carefully. 
All information required to properly build and test your kit is contained within the pages!   

1. DEFECTIVE PARTS:

 It's always easy to blame a part for a problem in your kit, Before you 

conclude that a part may be bad, thoroughly check your work. Today's semiconductors and passive 
components have reached incredibly high reliability levels, and it’s sad to say that our human 
construction skills have not! 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. Please 
send only the defective part(s), not the entire kit. The part(s) MUST be returned to us in suitable 
condition for testing. Please be aware that testing can usually determine if the part was truly 
defective or damaged by assembly or usage. Don't be afraid of telling us that you 'blew-it', we're all 
human and in most cases, replacement parts are very reasonably priced.   

2. MISSING PARTS:

 Before assuming a part value is incorrect, check the parts listing carefully to 

see if it is a critical value such as a specific coil or IC, or whether a RANGE of values is suitable 
(such as "100 to 500 uF"). Often times, common sense will solve a mysterious missing part 
problem. If you're missing five 10K ohm resistors and received five extra 1K resistors, you can 
pretty much 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 believe we packed an incorrect part or omitted a part clearly indicated in 
your assembly manual as supplied with the basic kit by Ramsey, please write or call us with 
information on the part you need and proof of kit purchase. 

3. FACTORY REPAIR OF ASSEMBLED KITS:

  

To qualify for Ramsey Electronics factory repair, kits MUST:     
1. NOT be assembled with acid core solder or flux. 
2. NOT be modified in any manner. 
3. BE returned in fully-assembled form, not partially assembled. 
4. BE accompanied by the proper repair fee. No repair will be undertaken until we have received 

the MINIMUM repair fee (1/2 hour labor) of $18.00, or authorization to charge it to your 
credit card account. 

5. INCLUDE a description of the problem and legible return address. DO NOT send a separate 

letter; include all correspondence with the unit. Please do not include your own hardware 
such as non-Ramsey cabinets, knobs, cables, external battery packs and the like. Ramsey 
Electronics, Inc., reserves the right to refuse repair on ANY item in which we find excessive 
problems or damage due to construction  methods. To assist customers in such situations, 
Ramsey Electronics, Inc., reserves the right to solve their needs on a case-by-case basis. 

The repair is $36.00 per hour, regardless of the cost of the kit. Please understand that our 
technicians are not volunteers and that set-up, testing, diagnosis, repair and repacking and 
paperwork can take nearly an hour of paid employee time on even a simple kit. Of course, if we find 
that a part was defective in manufacture, there will be no charge to repair your kit (But please 
realize that our technicians know the difference between a defective part and parts burned out or 
damaged through improper use or assembly). 

4. REFUNDS: 

You are given ten (10) days to examine our products. If you are not satisfied, you 

may return your unassembled kit with all the parts and instructions and proof of purchase to the 
factory for a full refund. The return package should be packed securely. Insurance is 
recommended. Please do not cause needless delays, read all information carefully. 

Summary of Contents for MX-5

Page 1: ...nsmitter or audio amplifier Perfect for mixing those car tapes before the big trip 2 Line inputs and one mic input all most people will ever need Overload protection on the microphone input to soften...

Page 2: ...F and UHF Transceivers HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW 700 Micro Memory CW Keyer PA Series VHF and UHF Power Amplifiers Packet Computer Interfaces QRP Power Amplifiers...

Page 3: ...Work 5 Learn As You Build 7 Parts List 9 Construction 10 Schematic Diagram 12 Setup And Testing 16 Troubleshooting 17 Parts Value Diagram 18 Parts Layout Diagram 19 Using the MX 5 21 KIT ASSEMBLY AND...

Page 4: ...uld notice that they have upwards of fifty or so channels and seven or more controls for each channel Each channel has reverb tone controls delay and more Our MX 5 has only two inputs for the line lev...

Page 5: ...g The microphone amplifier is slightly different from what you may have expected Not only does it have gain but it also has two diodes in the feedback of one of the amplifiers First we will talk about...

Page 6: ...ch more tolerable This soft clipping circuit prevents a person from overloading amplifiers or speakers by preventing high volume levels from exiting the mixer The output from the microphone amplifier...

Page 7: ...ting both wires and pads simultaneously Apply the solder on the iron and the pad when the pad is hot enough to melt the solder The finished joint should look like a drop of water on paper somewhat soa...

Page 8: ...especially when there s a right way and a wrong way to solder it in Diode bands electrolytic capacitor polarity transistor shapes dotted or notched ends of IC s and so forth 4 Solder all connections...

Page 9: ...R23 5 1K ohm resistors brown black red R14 22 24 25 26 2 1M ohm resistors brown black green R19 28 1 47K ohm resistor yellow violet orange R27 Capacitors 11 10uF electrolytic capacitors C1 2 3 4 5 6 7...

Page 10: ...resistor brown black orange 8 Install R12 a 10K ohm resistor brown black orange 9 Install R22 a 1K ohm resistor brown black red 10 Install R16 a 10K ohm resistor brown black orange 11 Install R14 a 1K...

Page 11: ...t as possible 25 Install JMP2 using another scrap piece of component lead 26 Install R15 a 10K ohm resistor brown black orange 27 Install R17 a 10K ohm resistor brown black orange We are done installi...

Page 12: ...l C13 the LAST 10uF electrolytic capacitor If we have to remind you to check polarity again then Hmmm I guess you know the consequences 41 Install D3 a 1N4002 type diode black body with white stripe o...

Page 13: ...ee under each of the sliders that there are jumpers each end marked with a circle We will be installing these jumpers but only soldering the end with the circle into place before installing the slider...

Page 14: ...possible solder bridges INITIAL TESTING THE MX 5 For this portion of the kit building experience you will need the following items Line level source such as a tape deck signal generator or CD player...

Page 15: ...trouble shooting skills Make sure a signal is present on both left and right inputs then trace through the circuit using an oscilloscope or DMM set on AC to find where the signal stops You will need...

Page 16: ...MX 5 Page 16 PARTS SIDE VALUES...

Page 17: ...MX 5 Page 17 PARTS LAYOUT DIAGRAM...

Page 18: ...MX 5 Page 18 CONTROL SIDE LAYOUT...

Page 19: ...he PLL stereo transmitter SHA 1 Headphone amplifiers for monitoring sound To run this setup using an audio amplifier for DJing just remove the STC 1 and replace the FM 25 with the audio amplifier of c...

Page 20: ...r catalog and see all of the projects that you can put together We have one of the most complete line of kits available today and many more products to come Give us a buzz well send you a catalog Call...

Page 21: ...uch 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 yo...

Page 22: ...MX 5 RAMSEY ELECTRONICS INC 793 Canning Parkway Victor New York 14564 Phone 716 924 4560 Fax 716 924 4555 Printed on recycled REQUIRED TOOLS Soldering Iron Ramsey RTS06 Radio Shack RS64 2072 Thin Rosi...

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