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Ramsey Electronics PPM3 - page 1
PPM3 Page 1 Ramsey Electr onics Model N o. PPM3 Ever wis h you coul d broadc ast on-the- air t elepho ne calls li ke the comm erci al radio stations ? Wel l now y ou can! Th e PPM3 gives you the a bility to broadcast b oth sides o f a phone conversation without having t o change a ny conn ections to return to yo ur m usic or other pr ogramm ing. Pe ...
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Ramsey Electronics PPM3 - page 2
PPM3 Page 2 RAMSEY TRANSMITTER KITS • FM10A, FM2 5B FM Stereo Tr ansmitters • FM100B Profess ional FM St ereo Transmitter • TXE433 or 916 Tr ansmitter & Encoder Modul e • RXD433 or 91 6 Data Receiv er& D ecoder • RR1 Wired remote repeate r • RRW1 Wireless r emote rep eater RAMSEY RECEIVER KITS • FR1 FM Broa dcast Receiv er • ...
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Ramsey Electronics PPM3 - page 3
PPM3 Page 3 PHONE P A TCH MIXER KIT Ram sey Public atio n No. M P P M 3 Pri ce $5 .00 TABLE OF CONTENTS Introduct ion ........................................... 4 Theor y of Operation .............................. 5 Learn As You Bu ild ............................... 8 Parts Placem ent Diagram ................... 11 Parts List ................... ...
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Ramsey Electronics PPM3 - page 4
PPM3 Page 4 PPM3 INT RODUCT ION W e’ve all heard those awesom e call- in program s on the radio. You k now, the ones wher e the h ost lets th e averag e Joe gi ve his o pinion on-the- air to a ll of his listener s . . . regar dless of intel ligence level or speak ing s kills! Yes, we’ ve all been em barras sed for poor old Joe when he puts his ...
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Ramsey Electronics PPM3 - page 5
PPM3 Page 5 PPM3 CIRCUIT DESCRI PTION The PPM 3 is es sential ly a ster eo audio m ixer , with one s tereo li ne input a nd two special ized m ono input s, each f eeding into the s tereo l ine output. The phone and m ic inpu ts each have a pr e-am p stage that acts as a c omplete s ig- nal cond itioner. The m ixing core is done wit h two op am ps, ...
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Ramsey Electronics PPM3 - page 6
PPM3 Page 6 The m icrophone pus hbutton s witch ( S3) is us ed to tur n on the m ic chann el b y pushing it in, and t o m ute the m ic channe l by lea ving it out. The m ic LED is powered o n when t he mic is on b y using the other ha lf of the switch . The phon e line in put is m eant t o monitor both ends of a ph one conv ersation. An exter nal l ...
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Ramsey Electronics PPM3 - page 7
PPM3 Page 7 the far-end pho ne. So the solut ion is to use a high amount of com pres s ion in order to am plif y the far -end, weak er signa l m uch mor e than the loc al str onger signal. I n this way both s ides of the convers ation ar e closer to each ot her in signal s trength when appl ied to t he main m ixer . A 100K ohm res istor was used to ...
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Ramsey Electronics PPM3 - page 8
PPM3 Page 8 RAMSEY “LE ARN-AS-YOU-BUILD” ASSEMBLY STRATEGY Be sure to read thr ough a ll of the s teps, and c heck the boxes as you go t o be sure you didn't m iss an y im portant steps. Altho ugh you m a y be in a hurr y to see resu lts, b efore you switc h on the p ower chec k all wiring a nd capacitors for pr oper orie ntatio n. Also c ...
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Ramsey Electronics PPM3 - page 9
PPM3 Page 9 Although we k now that you are anxious to com plete the as sem bly of your phone patc h m ixer kit it is best to follo w the step- by-ste p instruct ions in t his manual. T r y to a void the urge to jum p ahead installing com ponents. Remem ber that all of the com ponents will be m ounted on the c omponent side of the circ uit boar d an ...
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Ramsey Electronics PPM3 - page 10
PPM3 Page 10 Once this is acc om plished, the p art can be insta lled b y holding i t with tweezers in cont act with th e “tinned” tr ace an d re-heat ing the so lder ( see the associated diagram s). Anot her com m only used techn ique is t o glue the surf ace mount c omponents to the printe d circ uit boar d befor e solderin g. The procedure i ...
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Ramsey Electronics PPM3 - page 11
PPM3 Page 11 PPM3 P ARTS PL ACEM ENT DI A GR AM ...
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Ramsey Electronics PPM3 - page 12
PPM3 Page 12 PARTS SU PPLIED WIT H YOUR PPM 3 KIT Capacitors 1 2.2nF ceram ic disc capaci tor [m arked 222] ( C16) 1 5.6nF ceram ic disc capaci tor [m arked 562] ( C33) 3 10nF ceram ic dis c capacit ors [mark ed 103] (C11,C1 3,C23) 2 High volt age 10nF capaci tors [lar ge red c apacitors mark ed .01M] (C3, C4) 1 47nF ceram ic di ...
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Ramsey Electronics PPM3 - page 13
PPM3 Page 13 2 SSM2165- 1S surf ace m ount micr ophone am plifier ICs (U1,U3) Miscellaneous Components 3 DPDT switc hes (S1,S 2,S3) 1 1/4” stereo jack (J7) 1 Dual RJ11 jac k (J 1) 1 2.1mm power jack (J4) 2 Dual RCA j ack s (J2,J3) 1 Isolation transf orm er [large yello w part with 6 le ads] (T 1) 1 Piece of heat sh ...
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Ramsey Electronics PPM3 - page 14
PPM3 Page 14 PPM3 SCH EM ATIC DIAGR A M ...
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Ramsey Electronics PPM3 - page 15
PPM3 Page 15 PPM3 PHO NE P ATCH M IXER ASSEMBLY Assem bly of the PPM3 is eas y but still r equir es som e tim e and patie nce. W e will start with the s urfac e mount parts an d get t hem out of the wa y. As with an y stat ic sens itive par ts be caref ul when insta llin g the IC’s in th is kit. Don’t rub your feet acr oss the car pet and th en ...
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Ramsey Electronics PPM3 - page 16
PPM3 Page 16 5. In the sam e wa y install C 20, a 1 0uF electr olytic c apacit or, again check ing your polarit y before solder in g. 6. Install C1 9 and C 18, noting that these are als o 10uF e lectrol ytics and the polar ity is ex actl y opposite to the two par ts you jus t insta lled. Sim ply follo w the silk scr een and la yout diagram ...
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Ramsey Electronics PPM3 - page 17
PPM3 Page 17 25. Install R1 9, 470 ohm s (yellow-viol et-brown) . 26. Install R2 7, 15k ohms ( brown-green- orange). 27. Install C2 3, 10nF (m ark ed 103). 28. Install C2 2, 0.1uF c apacit or (mark ed 104). 29. Install R2 2, the las t 15k ohm resistor (brown- green-or ange). 30. Install R1 8, 10k ohms (br own-black -orange) ...
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Ramsey Electronics PPM3 - page 18
PPM3 Page 18 W e’ll sk ip T1 f or now and c om e back to it l ater. 46. Install C3 1, 47nF (m ark ed 473). 47. Install D2 , 1N414 8 diode (o range gl ass bod y with a b lack band) . Orient t he black band wit h the b and mar ked on the s ilk screen and PC board la yout. 48. Install D1 , the las t 1N4148 diode (or ange gl ass bod y wit ...
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Ramsey Electronics PPM3 - page 19
PPM3 Page 19 save them f or last. Ok , that’s not th e reason, i t just m akes sens e to do them after all the big, b ulk y parts ar e in. 61. Install C1 0, the big 1000uF electro lytic cap acitor. Ok , one las t time, f or real, m ake s ure you get t he posit ive lead and th e negativ e lead or iented correc tly befor e solder ing. T his one ...
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Ramsey Electronics PPM3 - page 20
PPM3 Page 20 72. Install R1 5, the other 10k audio pot. 73. Install R2 , the 10k stereo audi o pot. Now the L EDs. As you ma y know, LEDs h ave a po larity just l ike diod es (the y are diod es, light em itting ones) and m us t be installe d corr ectly to wor k. The diagram belo w shows the anode ( positi ve) and cat hode (neg ative) pins o ...
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Ramsey Electronics PPM3 - page 21
PPM3 Page 21 TEST ING YO UR PPM3 Now it’s t im e to see all your hard work pay off. Her e’s what you’ll need to test and us e your P PM3 • An 8 to 15 volt DC power supp ly, posi tive tip • CD player or other d evice t o provid e a line le vel a udio inp ut to the PPM3 • A stereo or other d evice th at has li ne level inputs • A micr o ...
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Ramsey Electronics PPM3 - page 22
PPM3 Page 22 8. Plug your phone line f rom the wall jac k into the “T elep hone Inp ut” on the back of the PPM 3. 9. In order to c ontrol a phon e line you n eed to con nect a phone to the “Telephon e Output” of the PPM3. If you lif t the rec eiver on th e phon e you should be able to h ear the dial tone t hrough t he unit . In orde ...
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Ramsey Electronics PPM3 - page 23
PPM3 Page 23 TROUBLESHOOTING GUIDE If y our P PM3 does not wor k at all, rec heck the f ollowing: • correc t orientati on of VR1 a nd the ICs ( see PC board la yout diagr am) . • You shou ld be a ble to m easur e the volta ge on t he input an d outpu t term inals of vol tage reg ulat or VR1. T he input s hou ld be wha tever th e suppl y voltag ...
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Ramsey Electronics PPM3 - page 24
PPM3 Page 24 known good cables bet ween the ster eo, line level s ourc e, and PPM3 . Tr y switchin g cables or using a dif ferent c able if you’re ha ving a udio tro uble. PROBLE M: The m icropho ne doesn’t work. SOLUTI ON: Tes t the m icrophone with another u nit to be sure it works on its own. Mak e sure it ’s plugg ed sol idly into th e ja ...
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Ramsey Electronics PPM3 - page 25
PPM3 Page 25 PPM3 PHO NE P A TC H M IXER SPEC IFIC A TIO NS Here are f ew of the c omm only reques ted spec ificati ons f or the PPM3: J4 Power Inp ut - Input working voltage r ange: 8 - 15 VDC - Max cur rent dra w is bet ween - m A. Miscel laneous I nform ation - PCB Dim ensions: 4.7” L x 4” W (max c omponent he ight: ”) - Max. m ic volt age ...
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Ramsey Electronics PPM3 - page 26
PPM3 Page 26 ...
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Ramsey Electronics PPM3 - page 27
PPM3 Page 27 The Ramsey Kit Wa rranty Please read c arefully BEF ORE calling or writing in abou t y our kit. Most problems can be solved without conta cting the factory . Notice that this is not a " fine print" warran ty. We want you to unders tand your ri ghts and o urs too! All Ramsey ki ts w ill work if a ssembled properly . The very f ...
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Ramsey Electronics PPM3 - page 28
PPM3 Page 28 PPM3 REM OT E INTERF ACE KIT Quick Refe rence Page Gu ide Introduction ........................................... 4 Theor y of Operation .............................. 5 Learn As You Bu ild ................................ 8 Parts Placem ent Diagram ................... 11 Parts List ............................................. 12 Sch ...
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