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Ramsey Electronics FR220, Инструкция по эксплуатации

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FR-220 

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 9 

FR220 PARTS LAYOUT DIAGRAM 

Содержание FR220

Страница 1: ...cellent performance less than 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...

Страница 2: ...MATEUR RADIO KITS 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 for hobby...

Страница 3: ...6 Simplified Block Diagram 8 Parts Layout Diagram 9 FR220 Assembly Instructions 11 Testing and Alignment 21 Enclosure Ideas 24 Troubleshooting Guide 24 Notes for Advanced Users 25 Ramsey Kit Warranty...

Страница 4: ...manual is written with the beginner in mind because we are well aware of the fascination with 220 MHz and its maze of repeaters holds for newcomers which means this could be your very first kit projec...

Страница 5: ...RCUIT DESCRIPTION VHF signals from the antenna are amplified through the tuned input circuit L1 C3 and L2 C4 by Q1 a microwave bipolar transistor Q1 s output is fed to the input of the SA602 IC an eff...

Страница 6: ...n Pin 16 of U2 will ground the input of U3 when the squelch is closed L4 a 455 KHz IF coil permits adjustment of the 90 degree voltage current phasing quadrature of FL2 s output to the FM detector dem...

Страница 7: ...19 1 27 pf C11 2 100 pf marked 100 or 101 C6 22 1 220 pf marked 220 or 221 C18 6 001 uf marked 001 or 102 or 1nf C7 8 20 23 24 25 8 01 uf marked 01 or 103 or 10nf C13 16 17 21 26 28 29 31 1 1 uf marke...

Страница 8: ...FR 220 8 U2 3359 FR220 BLOCK DIAGRAM U1 SA602 MIXER...

Страница 9: ...FR 220 9 FR220 PARTS LAYOUT DIAGRAM...

Страница 10: ...ize and style jack we suggest that you still install the original jack and then wire your own jack in parallel with it rather than rough up the PC board to accommodate your jack SEMICONDUCTOR REPLACEM...

Страница 11: ...flow for clean shiny completed connections Don t be afraid of ANY pen style soldering iron having enough heat to damage a component 5 Trim or nip excess wire lengths after soldering NOTE Save some of...

Страница 12: ...all C3 10 pf 8 Install L1 a small 4 turn wire coil Gently stretch the coil just enough so that it s two wire leads fit firmly into the PC board holes Solder both leads securely This coil is designed t...

Страница 13: ...DO be sure to orient the end marked by a band or dot IC correctly Before soldering make sure that the IC or socket is perfectly flat against the top of the PC board 19 Install U1 the SA602 in accord w...

Страница 14: ...FR 220 14...

Страница 15: ...FR 220 15...

Страница 16: ...e is marked on the capacitor body a dark band with the sign clearly shown The value of C14 is not critical and may be any value from 100 to 220 uf 34 Install C14 100 to 220 uf observing correct polari...

Страница 17: ...1 uf marked 01 or 103 or 10nf 47 Install C30 4 7 or 10 uf electrolytic observe correct polarity 48 Install R18 18K ohms brown gray orange 49 Install C28 01 uf marked 01 or 103 or 10nf 50 Install R19 1...

Страница 18: ...chnique to make sure that no solder bridges flow between the connections 64 Install C22 100 pf marked 100 or 101 65 Install C16 01 uf marked 01 or 103 or 10nf 66 Install C17 01 uf marked 01 or 103 or...

Страница 19: ...tic observe polarity 82 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 83 The battery bracket may be attac...

Страница 20: ...not already have a set of plastic or nylon coil alignment tools and do expect to try further Ham radio or electronic hobby projects such tools are worth having and can be found inexpensively at any el...

Страница 21: ...rtion of its signal on 215 75 MHz If you can tune some semblance of channel 13 audio on your receiver you know that a slight adjustment of L3 will bring your receiver up into the 222 MHz ham band You...

Страница 22: ...own whip ADDING AN LED POWER ON INDICATOR For many people a pilot lamp to indicate power on is more than a nice touch They expect it and depend on it reminding us that real radios glow in the dark Ad...

Страница 23: ...panels knobs rubber feet and mounting screws OTHER ENCLOSURE RECOMMENDATIONS While we believe that the Ramsey enclosure and knob option is a fine value for finishing off your Ramsey receiver or trans...

Страница 24: ...cy counter to verify oscillator operation Next make sure that the 10 245 MHz crystal oscillator is running by tuning a general purpose HF shortwave receiver to that frequency If either oscillator is n...

Страница 25: ...ctor L3 and associated capacitors would be replaced by the appropriate crystal tank components Remember that the crystal oscillator should be planned to operate 10 7 MHz above the desired receiving fr...

Страница 26: ...a for it Again please be sure that you understand your warranty and that you understand your receiver and how to keep it working before attempting any modifications If you ve enjoyed this kit be sure...

Страница 27: ...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...

Страница 28: ...nual for RAMSEY MODEL NO FR220 220 MHz FM RECEIVER KIT RAMSEY ELECTRONICS INC 590 Fishers Station Drive Victor New York 14564 Phone 585 924 4560 Fax 585 924 4555 www ramseykits com REQUIRED TOOLS Sold...

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