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UAM2

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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!  However, customer 
satisfaction is our goal, so in the event that you do have a problem, take note of the following. 
 

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 its 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 $25.00, 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 $50.00 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 UAM2

Page 1: ...2V Square board for screw mounting or circular break out board for attaching directly to speaker magnet Line level input Adjustable gain 12dB 18dB 23 6dB 32dB Remote shutdown input Need more audio pun...

Page 2: ...MATEUR RADIO KITS HR Series HF All Mode Receivers DDF1 Doppler Direction Finder Kit QRP Series HF CW Transmitters CW7 CW Keyer QRP Power Amplifiers RAMSEY MINI KITS Many other kits are available for h...

Page 3: ...on 4 Learn As You Build Kit Assembly 6 Parts List 8 Assembly Steps 9 Setup and Testing 11 Troubleshooting Guide 11 UAM2 Parts Layout Diagram 13 UAM2 Schematic 13 Ramsey Kit Warranty 15 KIT ASSEMBLY AN...

Page 4: ...ts TPA3001D1 audio amplifier It is a 20W audio amp in a 24 pin TSSOP package that we have soldered onto the board for you We know that many of our customers have super skills but we soldered it on for...

Page 5: ...t to the speaker The magic of all this is that the circuitry needed to carry out these operations can be digital because all the waveforms are squarewaves the voltage is either high or low on or off u...

Page 6: ...sier but help you to understand the circuit you re constructing For each part our word Install always means these steps 1 Pick the correct part value to start with 2 Insert it into the correct PC boar...

Page 7: ...printed circuit board before soldering The procedure is to take a small amount of glue usually with a pin or toothpick and dab the circuit board in the place where the component will be affixed Be car...

Page 8: ...0K ohm surface mount resistor 124 R2 R3 R4 R6 CAPACITORS 7 1 uF surface mount capacitor C2 C3 C5 C6 C7 C9 C11 2 001 uF surface mount capacitor C14 C15 2 22 uF surface mount capacitor C12 C13 1 47 uF s...

Page 9: ...nt capacitor to the right of R2 4 Install C5 1 uF surface mount capacitor to the right of R3 5 Install C8 47 uF surface mount capacitor just below R7 6 Install C9 1 uF surface mount capacitor above C5...

Page 10: ...l testing for this kit someone soldered it in backwards and well there was an incident The black band indicates the negative lead It s pretty easy to solder in The leads are big ger so it will take a...

Page 11: ...blocks Hear that sound OOOO Feel that chip not get hot AHHH Unless it doesn t work then The long black and red twisted pair wire is for you to connect your speaker to the UAM2 The green screw terminal...

Page 12: ...Hear that sound OOOO Feel that chip not get hot AHHH Unless it doesn t work then TROUBLESHOOTING GUIDE Well this being a surface mount kit and all if something doesn t work it s probably because one o...

Page 13: ...UAM2 13 UAM2 BOARD PARTS LAYOUT DIAGRAM UAM2 MAIN BOARD SCHEMATIC...

Page 14: ...friendly format that is possible As our customers we value your opinions comments and additions that you would like to see in future publications Please submit comments or ideas to Ramsey Electronics...

Page 15: ...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 Electronic...

Page 16: ...NO UAM2 UNIVERSAL AUDIO AMP REQUIRED TOOLS Soldering Iron WLC100 Thin Rosin Core Solder RTS12 Needle Nose Pliers MPP4 or RTS05 Small Diagonal Cutters RTS04 ADDITIONAL SUGGESTED ITEMS Helping Hands Hol...

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