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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 incred bly 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 l ke. 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. 

Содержание AR2WT

Страница 1: ...control towers centers and planes en route Very sensitive picks up planes 100 miles away Great project for all pilots and flight students Clear concise step by step instructions carefully guide you t...

Страница 2: ...Meter LC1 Inductance Capacitance Meter RAMSEY AMATEUR RADIO KITS HR Series HF All Mode Receivers DDF1 Doppler Direction Finder Kit QRP Series HF CW Transmitters CW7 CW Keyer QRP Power Amplifiers RAMS...

Страница 3: ...No AR2 Manual Price Only 5 00 TABLE OF CONTENTS Introduction 4 What You Can Expect to Hear 4 Circuit Description 8 Block Diagram 10 AR2 Schematic Centerfold 12 Antenna Considerations 16 Modes of Opera...

Страница 4: ...l hear any aircraft you can see PLUS planes up to 100 miles away and more since VHF signals travel line of sight An airliner at 35 000 feet altitude is still line of sight to your antenna Similarly wh...

Страница 5: ...pilot on the status of incoming or outgoing aircraft but the pilot remains responsible for landing and takeoff decisions Typical CTAF frequencies are 122 7 122 8 and 123 0 MHz Unicom frequencies are u...

Страница 6: ...a cleared to outer marker Contact Tower 118 7 The local Approach Control is saying that the Piper Seneca with the N number tail number ending in 432L is cleared to continue flying an instrument approa...

Страница 7: ...AR2 7...

Страница 8: ...will have two different frequencies on the inputs which results in four signals on the output The received frequency is connected to one input and the local oscillator or LO is supplied to the other...

Страница 9: ...The band pass filter certainly helps and gets rid of all but the strongest image signals outside the band Now that we have our filtered 10 7MHz IF at the output of the IF filter we can do some simple...

Страница 10: ...rence 10 25MHz Vtune VCO 118 139MHz 118 139MHz 10 7MHz 450kHz Audio Detector IC Simplified Display Control RSSI IF1 Mixer IF2 Mixer IF AMP RF Amp Detector Antenna Speaker A B C D E F G H Audio Amp I J...

Страница 11: ...can be tuned using what is called a varactor diode in the oscillator section A varactor diode is a reverse biased diode that changes capacitance according to the reverse voltage The higher the voltag...

Страница 12: ...AR2 12...

Страница 13: ...AR2 13...

Страница 14: ...a C value of 410 This means the reference clock of 10 25MHz is divided by 410 to give a divider output of 25kHz This value remains constant throughout the AR2 circuit To receive 118 3MHz we have to s...

Страница 15: ...is device programs the PLL to get the frequencies desired handles the jog dial by interpreting it s pulses and then writes the data to the displays Quite a bit of coding is required to handle the scan...

Страница 16: ...action from the wire but if you re more than a few miles away a decent roof mount job is the way to go A low cost TV antenna works well even better if rotated 90 degrees remember aircraft antennas are...

Страница 17: ...eld strength of the signal RSSI 2 Lighting Control Mode This mode allows a user to access an external circuit to remotely control runway lights in small airports by keying the radio at the frequency t...

Страница 18: ...te frequency memories from scanner 3 16 Setup Scanner 4 Mode Allows you to save and delete frequency memories from scanner 4 17 Setup skip timer Allows you to select the amount of time to keep a parti...

Страница 19: ...uency is already in the list a sign will appear in the lower right to indicate it is already in the list if it is not Press and release the jog dial to add a frequency not in the list Press and releas...

Страница 20: ...opinions comments and additions you d like to see in future publications Please submit comments or ideas to Ramsey Electronics Inc or email us at techsupport ramseymail com Attn Hobby Kit Department...

Страница 21: ...AR2 21 These pages intentionally left blank...

Страница 22: ...AR2 22...

Страница 23: ...nd 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...

Страница 24: ...n Expect to Hear 4 Circuit Description 8 Block Diagram 10 AR2 Schematic Centerfold 12 Antenna Considerations 16 Modes of Operation 17 Warranty 35 Manual Price Only 5 00 Ramsey Publication No AR2 Assem...

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