Ramsey Electronics AF1 CW AUDIO FILTER Manuel d'instructions

AF1 • 1 E - Z CW AUDIO FILTER Ramsey Electronics Model No. AF1 Here’s a quick and easy way to eliminate interfering CW signals! This f

AF1 • 10  23. Install R22 and R21, both 100 ohm [brown-black-brown]. They are also mounted standing up.  24. Install stand up resistor R20, 1K ohm

AF1 • 11 AF1 PARTS LAYOUT DIAGRAM

AF1 • 12  31. Using a scrap component lead, form and install JMP11.  32. Install C13, .1 uF disc [marked .1 or 104].  33. Install C2, .001 uF disc

AF1 • 13  51. Install R3, 47K ohm [yellow-violet-orange].  52. Install R2, 750K ohm [violet-green-yellow].  53. Install R5, 100K ohm [brown-blac

AF1 • 14  Connect an audio output device such as a speaker or headset to the appropriate jack (J1 or J2, respectively). With switch S1 in the off po

AF1 • 15 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting t

AF1 • 16 AF1 CW AUDIO FILTER Quick Reference Page Guide Introduction to the AF1 ... 4 How it works ...

AF1 • 2 RAMSEY TRANSMITTER KITS • FM100B Professional FM Stereo Transmitter • FM25B Synthesized Stereo FM Transmitter • M

AF1 • 3 AF1 CW AUDIO FILTER Ramsey Publication No. MAF1 Price $5.00 TABLE OF CONTENTS Introduction to the AF1 ... 4

AF1 • 4 INTRODUCTION Radio men know that the CW signal is the most reliable mode of transmission when operating on the amateur radio bands. There ar

AF1 • 5 THEORY OF OPERATION Let’s have a look at what makes our audio filter so special. Have a look at the schematic diagram and follow along. Fir

AF1 • 6 AF1 PARTS LIST Please check the boxes after the components have been identified, and now is a good time to “sort” the like components into

AF1 • 7 MISCELLANEOUS PARTS  1 2.5mm power jack (J4)  2 PC mount RCA jacks (J1, 3)  3 DPDT pushbutton switch (S1, 2, 3)

AF1 • 8 Now, let's get building! Since you may appreciate some “warm-up” soldering practice as well as a chance to put some “landmarks” on the

AF1 • 9 polarity. See the parts diagram for proper placement. The capacitor should fit snugly down to the PC board. When installing the components be