Ramsey Electronics SR-1 Скачать руководство пользователя страница 20 | Manualshive

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SR-1

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Содержание SR-1

Страница 1: ...Ideal scout school or club project Clear concise step by step instructions carefully guide you to a finished kit that not only works but you ll also learn too Runs on a standard 9 volt battery Add our...

Страница 2: ...s HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW 7 CW Keyer PA Series VHF and UHF Power Amplifiers Packet Computer Interfaces QRP Power Amplifiers RAMSEY MINI KITS Many other kits ar...

Страница 3: ...an Expect to Hear 4 Shortwave Listening as a Hobby 5 Circuit Description 6 Parts Layout Diagram 7 Parts List 8 Assembly Instructions 9 Schematic Diagram 12 Shortwave Antenna Ideas 15 Initial Testing a...

Страница 4: ...ons due to the lack of superheterodyne design For example our popular Ramsey direct conversion receivers for the 80 40 30 and 20 Meter Amateur bands will also pick up AM broadcast stations but you ll...

Страница 5: ...ou tune through several different ham radio bands the signals are not likely to be intelligible Reception of CW and SSB signals on an AM receiver requires a BFO This is not a complicated feature but i...

Страница 6: ...rmits a tuning range of over 2 5 Mhz by R2 The mixer output is applied to the 260 Khz bandpass IF transformer and amplified by Q2 and Q3 The AM audio is detected by D2 and preamplified by U2 A before...

Страница 7: ...SR 1 7 SR 1 PARTS LAYOUT DIAGRAM...

Страница 8: ...R10 R11 3 47K ohm yellow violet orange R7 R8 R15 2 100K ohm brown black yellow R12 R13 1 1M ohm brown black green R14 SEMICONDUCTORS 1 1N270 diode glass bead style D2 1 Varactor diode transistor style...

Страница 9: ...stood and completed Some of the components require modification Examine the schematic circuit diagram and PC Board parts layout diagram as you proceed Use good soldering techniques Let your soldering...

Страница 10: ...round The antenna signal coupled through C1 level controlled by R1 peaked by L1 is now fed to input pins 1 and 2 of the NE602 Pin 3 of the NE602 is now connected to ground as required 9 Install C16 a...

Страница 11: ...owing from the antenna to C7 you already have built a direct conversion shortwave receiver capable of CW SSB reception throughout the SR 1 s tuning range If you want to prove it to yourself connect an...

Страница 12: ...1K brown black red 34 Install C10 01 F marked 01 103 or 10nF 35 Install R8 47K yellow purple orange 36 Install R9 1K brown black red 37 Install C12 01 F marked 01 103 or 10nF 38 Referring to Step 29...

Страница 13: ...F may be installed and black leads are inserted correctly 60 Install the battery clamp Position battery and holder so as not to cover nearby PC board mounting holes Use the method for securing the cl...

Страница 14: ...antenna is necessary simply make it as long as possible and as high up from concrete floors as you can 5 When installing any outdoor antenna BE VERY CAREFUL not to let your antenna wire come in contac...

Страница 15: ...down from its highest position The Tuning Control covers any 2 5 Mhz segment selected by adjustment of oscillator coil L2 Both L1 and L2 must be adjusted with a non metallic alignment tool such as is...

Страница 16: ...tolerances of the capacitors and coils involved Also notice how the amount of frequency change per turn increases with each turn However we can see that a setting of somewhere between 4 and 5 turns mi...

Страница 17: ...most reception quite satisfactory with the RF gain at its midpoint or so PROBLEM Local AM radio station audible throughout tuning range SOLUTION Whether this will even happen depends on how close you...

Страница 18: ...ter we are happy to give you a couple of additional suggestions and our reasons for them If your first goal is economy and rugged portability you will find that the circuit board can be mounted nicely...

Страница 19: ...u use your own enclosure and knobs you will probably plan some sort of dial markings If you finish your receiver with the Ramsey custom case and knob kit you may wish to copy one of the following desi...

Страница 20: ...SR 1 20 Notes...

Страница 21: ...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 b...

Страница 22: ...ial Information 20 Ramsey Kit Warranty 23 Manual Price Only 5 00 Ramsey Publication No MSR 1 Assembly and Instruction manual for RAMSEY MODEL NO SR 1 SHORTWAVE RADIO KIT Printed on Recycled Paper REQU...

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