Ramsey Electronics Walking Electronic Bug WEB1 Manuel d'instructions

FR-1 • 1 Ramsey Electronics Model No. FR1 Build your own FM Broadcast receiver. Radio covers 70 to 110 Mhz, ideal for tuning in out-of-b

FR-1 • 10  31. Install C5, .001 uf disc capacitor (marked .001 or 102 or 1 nf). Time for another break. We've now assembled the whole 'fro

FR-1 • 11  52. Install jumper JMP3. How about another break? Everything is done except for the demodulator section. The front-end is bringing in th

FR-1 • 12 TESTING AND ALIGNMENT A Hex head alignment tool is required to tune up your FR1. If you do not already have a set of plastic or nylon

FR-1 • 13 8. Using your alignment tool, slowly rotate L1's slug gently so that the slug is even with the top of the coil form. (Do not force the

FR-1 • 14 SPEAKER SELECTION A fifty-cent' speaker, lying naked on your workbench will not give you a fair test of your FR1 audio quality or

FR-1 • 15 different adapter or a well designed and filtered DC power supply. PROBLEM: Signals have unpleasant distortion. SOLUTION: Quadrature coil

FR-1 • 16 On weak signals it may be possible to hear the counter's busy humming action in the background, but not to a serious degree. If you de

FR-1 • 17 IN CLOSING... Finally, we remind you that modifications of the kit put you on your own, voiding your Ramsey limited warranty, making your u

FR-1 • 18

FR-1 • 19 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting t

FR-1 • 2 RAMSEY TRANSMITTER KITS • FM100B Professional FM Stereo Transmitter • FM25B Synthesized Stereo Transmitter • AM1

FR-1 • 20 FR1 FM BROADCAST RECEIVER Quick Reference Page Guide Introduction to the FR1 ...4 FR1 Circuit Description ...

FR-1 • 3 FR1 FM RADIO RECEIVER KIT Ramsey Publication No. MFR1 Price $5.00 TABLE OF CONTENTS Introduction to the FR1 ... 4 FR1 Circuit

FR-1 • 4 INTRODUCTION TO THE FR1 FM RADIO RECEIVER Why you may ask does Ramsey sell a 'plain old FM radio' receiver? No better person

FR-1 • 5 CIRCUIT DESCRIPTION FM broadcast signals captured by the whip antenna or from the input jack are applied to the RF amplifier Q2, a high ga

FR-1 • 6 RAMSEY FR1 FM RADIO RECEIVER KIT PARTS LIST CERAMIC DISC CAPACITORS:  4 .001 uf disc (marked .001 or 102 or 1 nf) [C4,5,15,27]  12

FR-1 • 7 HARDWARE & MISC:  1 Printed-circuit board  1 9-volt battery hold-down bracket  1 9-volt battery connector  2 RCA-style jack (

FR-1 • 8 BUILDING YOUR KIT Check off each step as understood and completed. Examine the schematic circuit diagram and PC-board X-ray illustration a

FR-1 • 9  13. Install R11, 47K ohm (yellow-violet-orange).  14. Install D1, varactor diode. It has a black body with green and red bands. Observe