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FR146 

 23 

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 incred bly 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 $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 FR146

Page 1: ...1 uV sensitivity Tuned input low noise preamp stage True Dual conversion superhet design with 2 pole Ceramic High IF and 6 pole Ceramic low IF filters Front Panel Volume Squelch and Tuning controls E...

Page 2: ...SEY AMATEUR RADIO KITS HR Series HF All Mode Receivers QRP Series HF CW Transmitters DDF1 Doppler Direction Finder CPO3 Code Practice Oscillator QRP Power Amplifiers RAMSEY MINI KITS Many other kits a...

Page 3: ...o the FR146 4 Circuit Description 5 Parts List 6 Simplified Block Diagram 8 Parts Layout Diagram 9 FR146 Assembly Instructions 10 Schematic Diagram 12 Testing and Alignment 18 Enclosure Ideas 20 Troub...

Page 4: ...eceiver to take on trips keep in a briefcase or to watch for band openings Before beginning the project or even studying the circuit description it is worthwhile to develop some prior respect for how...

Page 5: ...D1 and varied by R1 The output from pin 4 of the SA602 passes through a ceramic 10 7 MHz filter amplified by transistor Q2 and applied to input pin 18 of U2 Q3 provides AFC Automatic Frequency Control...

Page 6: ...black square FL2 Fixed Resistors 1 2 ohm red black gold R22 3 270 ohm red violet brown R6 9 20 1 470 ohm yellow violet brown R5 2 1K ohm brown black red R11 12 3 10K ohm brown black orange R7 17 19 1...

Page 7: ...subminiature 2 5 mm 3 32 audio output jack which mates with commonly available earphone plugs and adapters available at Radio Shack such as 274 290 plug or 274 327 adapter for 1 8 mono plug If you pr...

Page 8: ...FR146 8 U2 3359 FR146 BLOCK DIAGRAM U1 SA602 MIXER...

Page 9: ...FR146 9 FR146 PARTS LAYOUT DIAGRAM...

Page 10: ...component 5 Trim or nip excess wire lengths after soldering NOTE Save some of the longer wire scraps nipped from resistors and capacitors These will be used to form wire jumpers JMP1 etc to be soldere...

Page 11: ...mum amount of wire lead is exposed above the board In soldering don t be afraid to use enough heat to make good clean connections 13 Install R4 47K yellow violet orange just to the left of Q1 14 Insta...

Page 12: ...FR146 12...

Page 13: ...FR146 13...

Page 14: ...the PC board for mechanical stability which directly affects the frequency stability of the receiver Make good solid solder connections 27 Install C12 8 2 pF 28 Install varactor diode D1 marked BB505...

Page 15: ...LS 36 Install Q2 a 2N3904 transistor Correctly position the flat side 37 Install R13 47K ohms yellow violet orange 38 Install C20 001 uf marked 001 or 102 39 Install R12 1K ohms brown black red 40 Ins...

Page 16: ...yout diagram Solder each of the 18 connections carefully Make sure you have good lighting as well as good technique to make sure that no solder bridges flow between the connections 62 Install C22 100...

Page 17: ...33 100 to 220 uF electrolytic observe polarity 80 Install the battery snap terminal in the two holes below S1 making sure that the positive red lead is inserted into the hole on the PC board 81 The ba...

Page 18: ...rified reliable reception of your regional NOAA station adjustment to your desired listening range will become easier 2 L3 Alignment Tool If you do not already have a set of plastic or nylon coil alig...

Page 19: ...s without an antenna connected You can expect to monitor local repeater and simplex transmissions easily using a simple groundplane style antenna The receiver also responds very well to the addition o...

Page 20: ...ght be planning to combine several Ramsey circuit boards in a single enclosure Use of the inexpensive and attractive Ramsey case and knob kit will give your unit that finished look and increase its re...

Page 21: ...s Further signal path tracing may be necessary to find your problem Problem Very weak signals If Q1 is defective or incorrectly installed very little signal energy will reach the NE602 If Q2 is defect...

Page 22: ...rolled oscillator configurations was written by Michael A Covington with acknowledged assistance from Signetics personnel published with good circuit illustrations in Radio Electronics magazine for Ap...

Page 23: ...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 24: ...e 5 00 Ramsey Publication No FR 146 Assembly and Instruction manual for RAMSEY MODEL NO FR146 2 METER FM RECEIVER KIT REQUIRED TOOLS Soldering Iron Ramsey WLC100 Thin Rosin Core Solder Ramsey RTS12 Ne...

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