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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 1
PPM3 Pag e 1 Ramse y Electr onics Mo del No. PPM3 Ever wis h you coul d br oadc ast on-the- air t ele phone call s lik e the com mer cial r adio stations ? Wel l now y ou can! The P PM3 gives you the a bility to broadc ast both sides of a p hone conversati on with out h aving t o chang e any c onnections to return t o your m usic or oth er progr am ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 2
PPM3 Pag e 2 RAMSEY TRANSMITTER KITS • FM10A, FM2 5B FM Ster eo Transmitt ers • FM100B Pr ofessional FM Stereo Trans mitter • TXE433 or 916 Tr ansm itter & Encoder Modul e • RXD433 or 91 6 Data R eceive r& Decoder • RR1 Wired remote re peater • RRW1 Wirele ss remote r epe ater RAMSEY RECEIVER KITS • FR1 FM Broa dcast Rece iver ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 3
PPM3 Pag e 3 PHONE P A TCH MIXER KIT Ram se y Pub licat io n No. M P P M 3 Pr ice $5. 00 TABLE OF CONTENTS Introduct ion ........................................... 4 Theor y of Operati on .............................. 5 Learn As You Bu ild ............................... 8 Parts Placem ent Di agram ................... 11 Parts Lis t ............. ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 4
PPM3 Pag e 4 PPM 3 INTRODUCT ION W e’ve all heard thos e a wesom e c all-in pr ogram s on th e radio. You k now, the ones where the h ost l ets th e averag e Joe give his opi nion on-the- air t o all of his liste ners . . . r egard less of intel ligence lev el or s peak ing s kills! Yes, we’ve a ll been em barr assed f or poor old Joe when he p ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 5
PPM3 Pag e 5 PPM 3 CIRCUIT DE SCRIPT ION The PPM 3 is essenti all y a ster eo audi o m ixer, with one st ereo li ne inp ut and two speci alized m ono i nput s, each f eeding into th e ste reo line output. The phone a nd m ic inputs each hav e a pr e-am p stage th at acts as a com plete s ig- nal co nditioner . T he m ixing core is done with t wo op ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 6
PPM3 Pag e 6 The m icrophone pushb utton s witch ( S3) is us ed t o turn on the m ic chann el b y pushing it in, a nd to m ute t he m ic channe l b y leaving it out. The m ic LED is powere d on when the m ic i s on b y using t he other half of the s witch . The phon e line input is m eant to m onitor both e nds of a phone c onv ersati on. An ext er ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 7
PPM3 Pag e 7 the far-end pho ne. So the s olut ion is to use a high amount of com pr ess ion in order to am plif y the far- end, weak er s ignal m uch m ore than the loc al st ronger signal. I n this wa y both s ides of the con versat ion are closer to e ach ot her in signal s tren gth when applie d to t he m ain m ixer. A 1 00K ohm res istor was u ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 8
PPM3 Pag e 8 RA M SEY “L EARN-AS-YOU-BUILD” ASSEMBLY STRA T EGY Be sure to rea d throug h all of the s teps, and chec k the box es as you go t o be sure you d idn't m iss an y im portant steps . Alt hough you m a y b e in a hurr y to see res ults, bef ore you s witc h on th e po wer check all wir ing a nd capacitor s f or prop er orie ntat ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 9
PPM3 Pag e 9 Althou gh we k now tha t you ar e anxious to com plete th e ass em bly of your phone p atch m ixer kit it is best to follo w the ste p-b y-step ins truct ions in this m anual. Tr y to avoid t he urge to jum p ahead insta lling com ponents. Rem ember that al l of th e com ponents will be m ounte d on t he com ponent side of the c ircuit ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 10
PPM3 Pag e 10 Once this is accom plis hed, the p art can be ins tall ed b y holding i t with tweezers in cont act with the “ tinned” tr ace an d re-he at ing the so lder ( see th e assoc iated diagr am s). Anot her com m only used tec hnique is to g lue the surf ace m ount com ponents to th e printe d circ uit bo ard before s olderin g. T he pr ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 11
PPM3 Pag e 11 PPM 3 P A RT S PL ACEM ENT DI A GR AM ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 12
PPM3 Pag e 12 P A RTS SU PPL IED W ITH YOUR PPM 3 KIT Capacitor s 1 2.2nF ceram ic disc c apacit or [m ark ed 222] (C16) 1 5.6nF ceram ic disc c apacit or [m ark ed 562] (C33) 3 10nF cer am ic disc c apacit ors [mark ed 103] (C1 1,C13, C23) 2 High v oltage 10nF c apacito rs [lar ge red c apac itors m ark ed .01M] (C3, C4) 1 47nF ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 13
PPM3 Pag e 13 2 SSM21 65-1S s urfac e m ount micr ophone am plif ier ICs ( U1,U3) M isce llaneous Components 3 DPDT s witches (S1 ,S2,S 3) 1 1/4” ster eo jac k (J7) 1 Dual RJ11 j ack (J1) 1 2.1mm power jac k ( J4) 2 Dual RC A jack s (J2,J 3) 1 Isolat ion trans form er [large yello w part with 6 leads] ( T1) 1 Piece ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 14
PPM3 Pag e 14 PPM 3 SCHEM A T IC DI AGR A M ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 15
PPM3 Pag e 15 PPM 3 PHONE P A T C H M IXER ASSEMBL Y Assem bl y of the PP M3 is eas y but sti ll requ ires som e tim e and pat ienc e. W e will start with the s urf ace mount parts an d get t hem out of the way. As with an y static s ens itive par ts be car eful when i nsta llin g the IC ’s in this k it. Don’t rub your feet acros s the car pet ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 16
PPM3 Pag e 16 5. In the s am e way insta ll C 20, a 1 0uF elec trol ytic capac it or, again check ing your polar it y before sold erin g. 6. Install C1 9 and C 18, noting that these are a lso 10uF elec trolytic s and the pol arit y is exac tly oppo site to the two parts you jus t insta lled. Sim pl y follo w the si lk screen and la y ou t d ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 17
PPM3 Pag e 17 25. Install R1 9, 470 ohm s ( y ellow-viol et-bro wn). 26. Install R2 7, 15k ohm s (brown- green- orange) . 27. Install C2 3, 10nF (m arked 103) . 28. Install C2 2, 0.1uF ca pacitor (mark ed 104). 29. Install R2 2, the last 1 5k ohm resistor (br own-gree n-orange). 30. Install R1 8, 10k ohm s (brown- black -or ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 18
PPM3 Pag e 18 W e’ll sk ip T 1 for now and c om e back to it later. 46. Install C3 1, 47nF (m arked 473) . 47. Install D2 , 1N 4148 diod e (o range gl ass bod y with a black band). Orient t he blac k band with t he b and m ark ed on the silk s creen and PC board la yout. 48. Install D1 , the l ast 1N4 148 diode (or ange glass bod y wi ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 19
PPM3 Pag e 19 save t hem for las t. Ok , that’s not th e reaso n, it jus t m akes sense to do them after all the big, bulk y parts are in . 61. Install C1 0, the b ig 100 0uF electro lytic cap acitor. O k , one last tim e, f or real, m ak e sure you get the posit ive l ead an d the n egativ e lead or iente d corr ectly bef ore s olderin g. T ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 20
PPM3 Pag e 20 72. Install R1 5, the o ther 10k audio pot. 73. Install R2 , the 10k st ereo audi o pot. Now the L EDs. As you m a y know, LEDs h ave a po larity j ust lik e diodes (the y are diod es, light em itting on es) and m us t be ins talled c orrec tly to wor k. T he diagram belo w sho ws the a node ( posit ive) an d cathod e (neg ati ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 21
PPM3 Pag e 21 TEST ING Y OUR PPM 3 Now it’s tim e to see a ll your hard work pay off . Here’s what you’ll need to test an d use your PPM3 • An 8 to 15 vo lt DC po wer supp ly, posi tive tip • CD pla yer or ot her dev ice to pr ovide a line leve l aud io inp ut to the PPM3 • A stereo or ot her dev ice that has li ne le vel in puts • A ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 22
PPM3 Pag e 22 8. Plug your pho ne li ne fr om the wall jac k into the “T elep hone Inp ut” on the bac k of the PPM3. 9. In order to con trol a p hone l ine you n eed to c onnect a phon e to the “T elephone Outp ut” of the PPM3. If you lift th e recei ver on th e phon e you should be able t o hear the dial tone t hrou gh the u nit. I ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 23
PPM3 Pag e 23 TROUBLESHOOTING GUIDE If y our P PM3 d oes not work at all, rec hec k the f ollo wing: • corr ect orient ation of VR1 a nd the ICs ( see PC board layout d iagram ) . • You sh ould be able to m ea sur e the vo ltage on the input an d outpu t term inals of voltag e reg ulat or VR1 . The in put sh ould b e wha tever th e suppl y volt ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 24
PPM3 Pag e 24 k nown good c ables be tween the ster eo, line leve l sour ce, and PPM3 . T ry switchin g cab les or using a dif fer ent cable if you’re hav ing a udio tro uble. PROBLE M: The m ic rophone d oesn’t work . SOLUT ION: T est the m ic rophone with another unit to be sur e it works on its own. Mak e sur e it’s plugge d sol idly int o ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 25
PPM3 Pag e 25 PPM 3 PHONE PATCH M IXER SPEC IFIC A TIO NS Here are f ew of the com m only reques ted spec ific ation s for the PPM3: J4 Power Inp ut - Input work ing vol tage ran ge: 8 - 15 VDC - Max c urrent draw is between - m A. Miscel laneous I nf ormation - PCB Dim ens ions: 4.7” L x 4” W (max com ponent height: ” ) - Max. m ic voltage g ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 26
PPM3 Pag e 26 ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 27
PPM3 Pag e 27 The Ramsey Kit Warranty Please read c arefully BEFO RE calling or writing in about y our kit. Most problems can be solv ed without cont acting the factory . Notice th at thi s is no t a " fine print" warran ty. W e want you to understa nd your ri ghts an d our s too ! All Ramsey kits w ill w ork if asse mbled p roperly . The ...
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Ramsey Electronics Phone Patch Mixer Kit PPM3 - page 28
PPM3 Pag e 28 PPM 3 REM OTE INT ERFACE KIT Quick Refe renc e Page G uid e Introduct ion ........................................... 4 Theor y of Operati on .............................. 5 Learn As You Bu ild ................................ 8 Parts Placem ent Di agram ................... 11 Parts Lis t ............................................. ...
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