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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!   
 

1. DEFECTIVE PARTS:

 It's always easy to blame a part for a problem in your kit, however, customer 

satisfaction is our goal, so in the event that you do have a problem, take note of the following.  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 $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 FM10A

Page 1: ...r to their two way radio Now you can hear what s going on around town up to several blocks away from your house with a simple stereo receiver and adjust the volume of each individually with your balan...

Page 2: ...KITS FX 146 VHFTransceiver HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW7 CW Keyer CPO3 Code Practice Oscillator QRP Power Amplifiers RAMSEY MINI KITS Many other kits are available...

Page 3: ...ng Frequency 13 Adjusting your FM10A 14 Using your FM10A Within the Home 15 Power Supply Considerations 15 LED Power On Indicator 15 Experimental Broadcasting Projects 16 Antenna Ideas 17 Troubleshoot...

Page 4: ...y frequency stability and stereo channel separation of this build it yourself FM stereo transmitter If you follow our assembly directions carefully and use your FM10A in accordance with applicable FCC...

Page 5: ...justment of input level Resistors R3 and R6 set the pre emphasis characteristics 75uS for USA and 50uS for Europe R7 permits adjustment of stereo balance L1 and C16 form an adjustable resonant circuit...

Page 6: ...brown R9 R13 1 470 ohm yellow violet brown R8 1 4 7K ohm yellow violet red R11 3 10K ohm brown black orange R3 R6 R10 2 15K ohm brown green orange R3 R6 1 150K ohm brown green yellow R12 1 100K yellow...

Page 7: ...ck or CD player External antenna small gauge coax and RCA plug OR PC board mounted telescoping whip antenna included with the Ramsey CFM case and knob set OPTIONAL Ramsey FM10A case and knob set CFM o...

Page 8: ...in this FM10A stereo transmitter we try to make a reasonable compromise between following the signal path and just getting all parts in properly so you can enjoy your kit as soon as possible So you ca...

Page 9: ...t supplied with your kit There is no right or wrong direction to this socket but the U1 IC itself certainly needs to be inserted correctly later Taking care of this socket early in the project will he...

Page 10: ...ase the high frequency signal to noise ratio If you desire a brighter sound you may use the 10K ohm resistors rather than the 15K ohm parts 11 Install R3 15K brown green orange 12 Install R6 15K brown...

Page 11: ...ow violet brown 29 Install C20 001 F marked 001 or 102 or 1 nf RF amplifier and final components 30 Install shielded slug tuned coil L1 The larger tabs secure the shield can to the ground foil connect...

Page 12: ...C6 001 F marked 001 or 102 or 1 nf 43 Install C8 10 pf marked 10 or 10K 44 Install C7 10 pf marked 10 or 10K 45 Install Y1 the small silver can crystal Be especially careful when installing this part...

Page 13: ...e low end of the FM broadcast band 88 92 MHz where there are numerous medium power National Public Radio stations perhaps outside your own town but which your neighbors may enjoy receiving using a goo...

Page 14: ...variety of auxiliary output jacks of which one or more are line level outputs Hooking up an audio source to your FM10A is really quite simple However there are some general rules A terribly distorted...

Page 15: ...U1 at 2 1 volts Note however that reduced voltage will also affect the collector voltage and therefore the output power of Q1 Whether an alternative AC adapter can be used depends on the quality of t...

Page 16: ...ch is at the heart of any studio operation is beyond the purpose of this instruction manual We do recommend that you design and build this mixing system yourself for several reason 1 Parts to do so ar...

Page 17: ...oximate dipole such as 2 5 ft on a side will do fine while others believe it is worth the effort to calculate the length for your exact frequency using the simple formula of Length of one side in feet...

Page 18: ...pt such an installation unless you know exactly what to do and not to do Also because such an installation is beyond the original purpose of this kit and the safety standards intended for all Ramsey k...

Page 19: ...ment ask for CFR Title 17 Parts 1 to 19 The cost is 24 00 Master Card and Visa accepted In the United States this is how the FCC regards your transmitter kit Licensed FM broadcast stations and their l...

Page 20: ...ob of finding a clear frequency if one is available 3 For some frequency bands the FCC sets 100 milliwatts 0 1 watt as the maximum permitted power output for unlicensed home built transmitting devices...

Page 21: ...no harmful interference is caused and that interference must be accepted that may be caused by the operation of an authorized radio station by another intentional or unintentional radiator by industri...

Page 22: ...tance the signal power is quartered but the field strength voltage is only halved Using this theory we can construct a simple chart to show the maximum permitted performance of a non licensed FM band...

Page 23: ...asily and legally serve a school campus or wilderness campground 3 And if we remember that typical urban single family home sites run from 1 4 to 1 2 acre on the average it should become extremely cle...

Page 24: ...s does not provide detailed guidance on ALL aspects of using a low power transmitter such as the FM10A The main point is that you may not cause any interference whatsoever to licensed broadcast servic...

Page 25: ...toughest about clandestine transmission which cost time and money to track down 10 Do not assume that the mere fact that you purchased this kit gives you any specific right to use it for any purpose b...

Page 26: ...anual will show you many legal uses of radio transmitting devices which do not require licensing either amateur or commercial To provide more personal and club radio learning opportunities and to cut...

Page 27: ...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 pr...

Page 28: ...l Cutters RS64 1845 OR Complete Soldering Tool Set RS64 2801 ADDITIONAL SUGGESTED ITEMS Soldering Iron Holder Cleaner RS64 2078 Holder for PC Board Parts RS64 2094 Desoldering Braid RS 2090 TOTAL SOLD...

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