Instruction/ maintenance manual of the product FR6 Ramsey Electronics
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6 METER FM RECEIVER KIT Ramsey Electronics Model No. FR6 Check out the 6 meter action with this simple and fun to build FM receiver. Receive crystal-cl ear signals from thousands of miles away! Six meters is a fascinating band! Tune the entire 6 Meter band or the VHF low Police and Fire band.
FR6 • 2 RA M SEY TRA NSMIT TER KI TS · FM100B Professional FM Ster eo Transmitter · FM25B Synthesized Stere o Transmitter · A M1, A M25 AM Transm itters · TV6 Television Transmi tter RAMSE Y.
FR6 • 3 FR6 6 METER FM RECEIVER KIT Ramsey Publication No. MFR6 Price $5.00 TABLE OF CONTENTS I ntroductio n to the FR6 .................. 4 Circuit Descr iption ......................... 5 Part s List ....................... ................. 6 Simplifie d Block Diagram .
FR6 • 4 INTR ODU C TION FM and repeaters on 6 mete rs? You bet ! There's no t a lot to sa y about u sing the FR6 r eceiv er once its be en correctly built and aligne d.
FR6 • 5 BUILDING Y OUR FR6 KIT There are just over 200 solder connecti ons on the FR6 printed circuit board. That means your w ork could be 99% excellent and you could STIL L have 2 or 3 cold solder points or solder bridges.
FR6 • 6 practical level for speaker or headphone oper ation. Pin 16 of U2 will ground the input of U3 w hen the s quelch is closed. L4, a 450 KHz IF coil, permits adjustment of the 90-degree voltage-curren t phasing ("quadra ture") of FL2's output to the FM detector demodulator (p in 8 of the MC3359).
FR6 • 7 4 62 pF (C3,4,9,10) 4 100 pF [marked 100, 101, or 101K] (C6,11,12,22) 1 220 pF [marked 220 or 221] (C18) 6 .001 uF [marked .001 or 102 or 1 nF] (C7,8,20,23,24,25) 8 .01 uF [mark ed .01 o r 103 or 10 nF] (C13,16, 17,21, 26,28,29,3 1) 1 .
FR6 • 8 U2, 3359 FR6 BLOCK DIAG RAM.
FR6 • 9 FR6 PARTS LAYOUT DI A GR A M.
FR6 • 10.
FR6 • 11 RAMSEY “Learn-As-You-Build” KIT ASSEMBL Y: W e have a tw ofold "strategy" for the order of the follow ing k it assembly steps. First, we install parts in physical relati onship to each ot her, so there 's mini mal chance of inserting w ires into wrong holes.
FR6 • 12 the PC board. In this case, the contro l lugs are wired to the PC board using your own insulated hookup wire, kept as short as possible for neat installation. All "directions" on the PC board (ie: ri ght, left, above, below and so forth) assum e orientati on of your board as sh own in the parts la yout diagram.
FR6 • 13 improper socket insertion tha n f rom solder ing heat damage to IC's. Even if this is your first IC, don't be afraid to use enough heat to make 8 clean connection s, but DO b e sure to correctl y orient the en d mark ed by a band, dot, or notch.
FR6 • 14 ❒ 37. Install jumper JMP1. ❒ 38. Install jumper JMP3. PROGRESS SUMMARY So far, you have wi red the tuned input from the antenna, the RF preamplifier, and the SA602 mixer- oscillator, including the vara ctor tuning circuit.
FR6 • 15 ❒ 50. Ins tall C28, .01 uF [marked .01, 103, or 1 0 nF]. ❒ 51. Install R19, 10 K ohm s [brow n-black-orange] ❒ 52. Install ju m per w ire, JMP2. ❒ 53. Install C34, .1 uF [marked .1 or 104]. ❒ 54. Install R2 1, 47K ohms [yello w-violet-orange].
FR6 • 16 ❒ 70. Install C19, 22 pF. ❒ 71. Install Y1, the 10.24 MHz. crystal. No special procedure is required. Simply press the crystal firmly into it s holes as far as it will go, and make good solder connections. ❒ 72. Install FL2, the 450 KHz filter.
FR6 • 17 ❒ 83. Install the battery sn ap term inal in the tw o holes b elow S1, making sure that the positive (red) lead is inserted into th e (+) hole on the PC board.
FR6 • 18 TESTING, ALIGNMENT AND ADJUSTMENT To prepare the FR6 FM VHF Receiver for reliable monitoring operation, y o u will need these basic tools: 1. A useful 6 meter signal source. 2. Hexagonal, non-me tallic coil slug alignment tool f or L3.
FR6 • 19 7. Turn the power ON. 8. Turn R2 (Volume control) until you he ar some noise. 9. Adjust L4 for maximum noise in the speaker. Further alignment now consists of adjusti ng the oscillator coil L3 to permit the tuning control (R3) to co ver the 5 MHz.
FR6 • 20 Study the PC traces between the positi ve battery supply wire and the on-off switch. The unused connectors on top of you r switch are an ideal point to get the + DC voltage needed for the anode (longer lead) of the LED. Plan where and how you wish to install the LED in your enclosure.
FR6 • 21 suited for Ramsey amateur kit boards is Radio Shack No. 270-253A. This metal utility cabinet can a ccommodate both a receiver and transm itter board, plus speaker, with ro om for various refinements you might like to add. FR6 TROUBLESHOOTING GUI DE The Ramsey FR-series FM receivers are among our most w idely-used an d popular kits.
FR6 • 22 SOME NOTES FOR ADV A N CED USERS Unlike Ramsey HF receivers and transm itters, the FR-serie s of VHF receivers do not offer much PC board space or real need for customization or other modifications.
FR6 • 23 The Ramsey K i t Warranty Pleas e read careful ly BEFO RE call ing or writ ing in about your k it. Mo st prob lems can b e so lved w ithou t co ntacti ng th e fa ctory. Notice that thi s is not a "fine print" warranty . We want you to und erstand your rights a nd ours too ! All Ramsey kits w ill work if assembl ed properly.
R6 • 24 FR6 6 Mete r FM Recei ver Kit Quick Reference Page Guide Introduction to the FR6 ......... ............ 4 Circuit Description ........... ................ .. 5 Parts List ........ ................. ................ .. 6 Simplified Bl ock Diagram .
An important point after buying a device Ramsey Electronics FR6 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Ramsey Electronics FR6 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Ramsey Electronics FR6 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Ramsey Electronics FR6 you will learn all the available features of the product, as well as information on its operation. The information that you get Ramsey Electronics FR6 will certainly help you make a decision on the purchase.
If you already are a holder of Ramsey Electronics FR6, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Ramsey Electronics FR6.
However, one of the most important roles played by the user manual is to help in solving problems with Ramsey Electronics FR6. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Ramsey Electronics FR6 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
