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[. . . ] 10 METER FM RECEIVER KIT
Ramsey Electronics Model No. FR10
Check out the 10 meter action with this simple and fun to build FM receiver. Receive crystal-clear signals from thousands of miles away!Tune the entire 10 Meter band or the VHF low Police and Fire band. [. . . ] Install C21, . 01 uf [marked . 01 or 103 or 10nf]. Install C18, 220 pf [marked 220 or 221]. Simply press the crystal firmly into its holes as far as it will go, and make good solder connections. Its three leads are delicate, and fit in only one way. Install C23, . 001 uf [marked . 001 or 102]. Install C27, 1 uf electrolytic, observe correct polarity. Install D2, the 1N914/1N4148 signal diode, observe correct orientation of the banded cathode end. Install R16, 100K ohms [brown-black-yellow].
FR-10 · 18
75. Install R15, 470K ohms [yellow-violet-yellow].
5. FINAL CONNECTIONS: THE LM386 AUDIO IC STAGE You now have a working FM receiver ready for adjustment. The output of the MC3359 FM IC simply needs to be boosted to listening level. A few more connections, and your receiver will be ready for adjustment and testing!Now would be a good time to review some of your previous work and also to make sure you have on hand what you'll need for testing: antenna, fresh battery, earphone or speaker with correct plug or adapter.
76. Review the instructions for installing U1 and U2. Insert U3, the LM386 IC with the band or dot oriented correctly. Install C32, a 100 to 220 uf electrolytic, observe correct polarity. Install C31, . 01 uf [marked . 01 or 103 or 10nf]. Install C36, 4. 7 or 10 uf electrolytic, observe polarity. Install C33, 100 to 220 uf electrolytic, observe polarity. 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. The battery bracket may be attached in a variety of ways. A wire jumper can be passed through the two holes on the PC board, then both ends soldered on the underside of the board. [. . . ] DO NOT send a separate letter; include all correspondence with the unit. Please do not include your own hardware such as non-Ramsey cabinets, knobs, cables, external battery packs and the like. Ramsey Electronics, Inc. , reserves the right to refuse repair on ANY item in which we find excessive problems or damage due to construction methods. To assist customers in such situations, Ramsey Electronics, Inc. , reserves the right to solve their needs on a case-by-case basis. [. . . ]
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