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AR2

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AIRCRAFT

RECEIVER KIT

Ramsey Electronics Model No. AR2

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Tunes the entire 118 - 136 MHz Air band

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Operates on 12 to 15 VDC

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Scan function “finds” the signals for you; no more laborious
tuning to find a transmission

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Memory locations make it easy to refind your local favorites

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Listen to control towers, centers, and planes en-route

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Very sensitive; picks up planes 100 miles away!

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Great project for all pilots and flight students

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Clear, concise step-by-step instructions carefully guide you to a
finished kit that not only works - but you’ll learn too!

A new and improved version of our popular Aircraft Receiver kit,
this new model features an LCD display, scan function, and
increased sensitivity, all in a rugged metal enclosure. Rivals
professional units costing much more and you have bragging
rights because you built it yourself!

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Содержание AR2

Страница 1: ...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 to a finished kit that not o...

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: ...Circuit Description 8 Block Diagram 11 AR2 Parts List 14 Assembly Instructions 16 AR2 Schematic Centerfold 18 Antenna Considerations 29 Setup and Testing 29 Troubleshooting 34 Warranty 35 INSTRUCTION...

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: ...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 11: ...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 12: ...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 13: ...ld the kits and we take input from every builder always striving to make your kit building experience as easy and pleasant as possible During the construction process I noticed a few things that might...

Страница 14: ...ytic capacitor C67 2 1000 F electrolytic capacitors C4 61 1 35 pF trimmer capacitor round red part with adjustment C48 FIXED RESISTORS 1 2 ohm resistor red black gold R39 2 22 ohm resistors red red bl...

Страница 15: ...3 9 uH inductor L8 2 11 turn air coils L1 2 1 Shielded can coil 0 18uH metal body L7 1 10 7 Mhz brown molded 3 leads FL1 2 450 kHz filters black cube FL2 3 CONTROLS HARDWARE MISCELLANEOUS 1 10 25 MHz...

Страница 16: ...problem later if necessary Ok here we go First we need to separate the two circuit boards They re easy enough to snap apart but once you ve done that you should file down the nubs left behind from sep...

Страница 17: ...d to the display board we can solder the display board to the front panel PC board First you ll need to snap off the two metal tabs on the front of the part to make it ready to install Be sure you gra...

Страница 18: ...AR2 18 SCHEMATIC CENTERFOLD...

Страница 19: ...AR2 19...

Страница 20: ...all U4 the SA602 mixer oscillator chip Be sure you have it placed correctly before soldering 17 Install U5 the other LMC6482AIN You know all about orientation and flatness by now so I ll just let you...

Страница 21: ...e shorter of the two leads The band and short lead denote the negative side of the cap Ironically the board will show which way the positive longer lead should be placed Simply place the part correctl...

Страница 22: ...marked 01 or 103 or 10nf 43 Install R25 47K ohm resistor yellow violet orange 44 Install R21 47K ohm resistor yellow violet orange 45 Install C44 0 01 F disc capacitor marked 01 or 103 or 10nf 46 Ins...

Страница 23: ...o polarity with this part so install it as it fits and solder all 4 leads 66 Install C51 0 1 F disc capacitor marked 1 or 104 67 Install R32 470 ohm standup resistor yellow violet brown 68 Install R34...

Страница 24: ...MHz crystal 89 Install C42 1nF disc capacitor marked 001 or 102 90 Install R23 2 7k ohm standup resistor red violet red 91 Install C62 10 F electrolytic capacitor Remember the polarity 92 Install Q4 B...

Страница 25: ...is big electrolytic has the same type of markings as the smaller 10 F caps and must be installed properly to work The longer lead is still the positive and the shorter lead that corresponds to the ban...

Страница 26: ...e direction And it s easier to install this one before FL2 so we ll do it that way 125 Install FL2 the other 450 kHz filter black cube 126 Install T1 the 421F201 IF transformer metal can marked IF201...

Страница 27: ...der for when you connect power to the kit 142 Next we ll place R4 into its holes but don t solder it in yet First we ll place that part and the one next to it R27 then we ll slide the PC boards togeth...

Страница 28: ...n everything is neat and right where you want it to be take your soldering iron and solder one of the pins of either J5 or J3 J5 is easier to get to You ll note that J5 is labeled J6 on the front pane...

Страница 29: ...s You need The AC adapter A diddle stick or other tuning device Your choice of antenna 1 Connect the AC adapter to your kit If you re using a non Ramsey adapter make sure the tip is positive 2 Turn th...

Страница 30: ...When the AR2 is locked onto a signal simply take a tuning tool and adjust C48 for the clearest sounding audio It s as simple as that Signal Generator Mode Set your generator to your desired frequency...

Страница 31: ...g 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 to which the AR2 is set 3 Full Scanner Mod...

Страница 32: ...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 particular frequency active before skipping to the next active frequency...

Страница 33: ...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 release the jog dial to remove a frequency...

Страница 34: ...he circuit in sections can help a lot for instance if your kit will not power up at all check the DC input jack and voltage regulators along with their capacitors If you get no sound from the speaker...

Страница 35: ...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 36: ...ions 16 AR2 Schematic Centerfold 18 Antenna Considerations 29 Setup and Testing 29 Troubleshooting 34 Warranty 35 RAMSEY ELECTRONICS INC 590 Fishers Station Drive Victor New York 14564 Phone 585 924 4...

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