309 lines
12 KiB
Plaintext
309 lines
12 KiB
Plaintext
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5
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$ Blue Box Plans.. $
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$ $
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$ THIS FILE WILL EXPLAIN THE $
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$ CONSTRUCTION, TROUBLESHOOTING, AND $
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$ ADJUSTMENT OF A BLUE BOX. $
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$ $
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$ $
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$ $
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$ WE ALL KNOW THAT THE TOUCH TONE $
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$ FREQUENCIES ARE COMPOSED OF 2 TONES $
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$ (2 DIFFERENT FREQS.) SO THAT IS THE $
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$ REASON WHY WE HAVE 2 VCO'S (VOLTAGE $
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$ CONTROLLED OSCILATORS). WE'LL CALL $
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$ THEM VCO#1 AND VCO#2. IF YOU HAVE $
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$ NOTICED VCO#1 AND VCO#2 ARE EXACTLY $
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$ THE SAME TYPE OF CIRCUITS. THAT IS $
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$ WHY ONLY 1 WAS DRAWN. BUT REMEMBER $
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$ THAT WHATEVER GOES FOR VCO#1 ALSO $
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$ GOES FOR VCO#2. BOTH VCO'S ARE $
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$ COMPOSED OF A HANDFULL OF PART. ONE $
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$ CHIP, TWO CAPACITORS, 2 RESISTORS $
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$ AND FIVE POTENTIOMETERS. ALL OF $
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$ THIS WILL GIVE YOU (WN PROPERLY $
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$ CALIBRATED) ONE OF THE FREQENCIES $
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$ NECESSARY (THE OTHER ONE WILL COME $
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$ FROM VCO#2) FOR THE OPERATION OF $
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$ THE BLUE BOX. BOTH OF THESE FREQS. $
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$ WILL BE MIXED IN THE SPEAKER TO $
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$ FORM THE REQUIRED TONE. $
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$ $
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$ $
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$ THIS IS ONE OF THE MOST $
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$ SOPHISTICATED DESIGNS I HAVE EVER $
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$ MADE. WHY?. BECAUSE OTHER DESIGNS $
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$ WILL DRAIN THE BATTERY AFTER 10 $
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$ CALLS. THIS DESIGN WILL MAKE THEM $
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$ LAST 10 MONTHS!!!!!!. BUT NEVER THE $
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$ LESS, DON'T FORGET TO PUT IN A $
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$ SWITCH FOR ON AND OFF. OK LET'S $
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$ BUILD THE TWO VCO'S AND CALIBRATE $
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$ THE UNIT BEFORE WE GET TO THE $
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$ KEYBOARD CONSTRUCTION. $
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$ $
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< >
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-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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!
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VCO CONSTRUCTION !
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=== ============ !
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!
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TOOLS REQUIRED !
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----- -------- !
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!
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1 OCILLISCOPE(OPTIONAL BUT NOT REQ) !
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1 FREQ. COUNTER (REQUIRED) !
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1 VOLT METER " " " !
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ELECTRONICS TOOLS (PLIERS,DRLL, !
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SCREWDRIVERS, ETC.) !
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!
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-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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< >
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.......................................
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. .
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. ------------- .
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. ! $-PARTS-$ ! .
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. ------------- .
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. .
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. R1 1.5K RESISTOR 5% .
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. R2 1K RESISTOR 5% .
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. C1 .1UF ELECTROLYTIC CAPACITOR 16VDC.
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. C2 .01UF " " (MYLQR)16VDC.
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.IC1 2207 VCO CHIP BY EXAR ELECTRONICS.
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. REMEMBER THE ABOVE ONLY SAYS .
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. VCO#1 BUT THE SAME IS FOR VCO#2 .
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. R3-R4 150 OHM RESISTORS 5% .
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. C3-C4 .1 UF ELECTROLITIC CAPACITOR .
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. 10VDC .
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. P1-P10 200K TRIMMER POT - 20 TURNS .
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. DIODES USED IN THE KEYBOARD .
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. ARE 1N914 TYPE (40 OF THEM) & .
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. 13 SWITCHES FOR THE KEYBOARD .
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. SPST MOMENTARY. .
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. SPKR=YOU CAN USE A TELEPHONE SPEAKER.
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. FOR THIS (IT WORKS BEST) BUT .
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. REMEMBER TO TAKE OUT THE DIODE .
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. THAT IS CONNECTED ACCROSS IT. .
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. .
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.......................................
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< >
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***************************************
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* *
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* --------------------- *
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* ! *IMPORTANT NOTES* ! *
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* --------------------- *
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* *
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* 1. DO NOT USE ANYTHING ELSE OTHER *
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* THAN A MYLAR CAPACITOR FOR C2. *
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* 2. PINS 10,9,8 SHOULD BE TIED *
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* TOGETHER AND BE LEFT FLOATING. *
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* 3. ALL RESISTORS SHOULD BE 5%! *
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* NOTHING ELSE! *
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* 4. A TELEPHONE SPEAKER GIVES THE *
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* BEST RESULTS. *
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* *
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***************************************
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< >
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% -------------------- %
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% ! TROUBLE SHOOTING ! %
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% -------------------- %
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% %
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% BY NOW YOU SHOULD HAVE CONSTRUCTED%
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% THE TWO VCO'S ON A BREAD BOARD OR %
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% ANYTHING THAT PLEASES YOU. %
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% CHECK FOR COLD SOLDER JOINTS, BROKEN%
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% WIRES, POLARITY OF THE BATTERY, ETC.%
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% BEFORE WE APPLY POWER TO THE VCO'S %
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% WE HAVE TO ADJUST THE POTS FOR THEIR%
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% HALF WAY TRAVEL POINT. THIS IS DONE %
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% BY TURNING THEM 21 TURNS TO THE %
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% RIGHT AND THEN 10 TURNS TO THE LEFT.%
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% DO THE SAME FOR ALL TEN OF THEM. %
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% %
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%-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-%
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% %
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% NOW APPLY POWER TO THE UNIT CHECK %
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% TO SEE THATY YOU HAVE POWER IN THE %
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% CHIPS BY PUTTING THE POSITIVE LEAD %
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% OF YOUR VOLT METER ON PIN 7 AND THE %
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% NEGATIVE LEAD ON PIN 12. IF YOU DO %
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% NOT HAVE ANYTHING THERE TURN OFF %
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% THE UNIT AND RECHECK THE WIRING. %
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% %
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%-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-%
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% %
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% WHEN YOU GET THE RIGHT VOLTAGES %
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% ON THE CHIPS, CONNECT A DIODE TO A %
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% PIECE OF WIRE (LOOK AT FIG. 2 FOR %
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% THE ORIENTATION OF THE DIODE) FROM %
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% GROUND TO ANY POT AT POINT T (LOOK %
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% CAREFULLY AT THE SCHEMATIC FOR %
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% POINT T IT IS LABELED T1-T10 FOR %
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% ALL POTS). YOU SHOULD BE ABLE TO %
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% HEAR A TONE, IF NOT DISCONNECT THE %
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% LEAD AND PLACE THE SPEAKER CLOSE TO %
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% YOUR EAR AND IF YOU HEAR A %
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% CHIRP-LIKE SOUND, THIS MEA^S THAT %
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% THE TWO VCO'S ARE WORKING IF YOU %
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% DON'T, IT MEANS THAT EITHER ONE OR %
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% BOTH OF THE VCO'S ARE DEAD. SO IN %
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% THIS CASE IT IS ALWAYS GOOD TO HAVE %
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% AN OCILLOSCOPE ON HAND. %
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% DISCONNECT THE SPEAKER FROM THE %
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% CIRCUIT AND HOOK THE OCILLISCOPE TO %
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% 1 OF THE LEADS OF THE SPEAKER & THE %
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% GROUND FROM THE SCOPE TO THE GROUND %
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% OF THE BATTERY. CONNECT AGAIN THE %
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% GROUND LEAD WITH THE DIODE CONNECTED%
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% TO IT FROM GROUND TO ANY POT ON THE %
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% VCO THAT YOU ARE CHECKING AND YOU %
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% SHOULD SEE A TRIANGLE WAVE IF NOT %
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% TURN THE POT IN WHICH YOU ARE %
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% APPLYING THE GROUND TO UNTIL YOU SEE%
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% IT. WHEN YOU DO SEE IT DO THE THE %
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% SAME FOR THE OTHER VCO TO MAKE SURE %
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% IT IS WORKING. (AMPLITUDE IS ABOUT %
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% 2VAC). WHEN YOU GET THE TWO VCO'S %
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% WORKING YOU ARE SET FOR THE %
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% ADJUSTMENT OF THE INDIVIDUALS POTS. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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< >
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:::::::::::::::::::::::::::::::::::::::
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: :
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: -------------- :
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: ! ADJUSTMENT ! :
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: -------------- :
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: :
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: DISCONNECT THE SPEAKER FROM THE :
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: CIRCUIT AND CONNECT A FREQ. COUNTER :
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: (THE POSITIVE LEAD OF THE COUNTER TO:
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: ONE OF THE SPEAKERS LEADS THAT :
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: BELONGS TO VCO#1 OR CONNECT IT TO :
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: PIN 14). :
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: :
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:-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-:
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: :
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: CONNECT THE NEGATIVE LEAD TO THE :
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: BATTERY NEGATIVE AND CONNECT THE :
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: JUMPER LEAD WITH THE DIODE FROM :
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: GROUND TO POT NUMBER 1.T1. :
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: ( THE FIRST POT NUMBER 1 POINT T1) :
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: IF YOU GOT IT WORKING YOU SHOULD :
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: HEAR A TONE AND GET A READING ON :
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: THE COUNTER. ADJUST THE POT FOR A :
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: FREQ. OF 1700HZ AND CONTINUE DOING :
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: THE SAME FOR POTS 2-5 EXCEPT THAT :
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: THEY GET DIFFERENTS FREQS. WHICH ARE:
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: :
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: $ $ :
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: $ P1= 1700HZ $ :
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: $ P2= 1300HZ $ :
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: $ P3= 1100HZ $ :
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: $ P4= 900HZ $ :
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: $ P5= 1500HZ $ :
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: $ $ :
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: :
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: NOW DISCONNECT THE FREQ. COUNTER :
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: FROM THE SPEAKER LEAD OF VCO#1 OR :
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: FROM PIN 14 (WHICH EVER YOU HAD IT :
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: ATTACHED TO AT THE BEGINNING) AND :
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: CONNECT IT TO THE SPEAKER LEAD OF :
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: VCO#2 OR TO PIN 14 OF VCO#2 AND :
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: MAKE THE SAME ADJUSTMENTS TO P6-10. :
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: :
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: $ $ :
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: $ P6= 1100HZ $ :
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: $ P7= 700HZ $ :
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: $ P8= 900HZ $ :
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: $ P9= 2600HZ $ :
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: $ P10= 1500HZ $ :
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: $ $ :
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: :
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: WHEN YOU FINISH DOING ALL OF THE :
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: POTS GO BACK AND RE-CHECK THEM. :
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: :
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:::::::::::::::::::::::::::::::::::::::
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< >
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<!><!><!><!><!><!><!><!><!><!><!><!><!>
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< >
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< ------------ >
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< ! KEYBOARD ! >
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< ------------ >
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< >
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< IF YOU LOOK AT FIG-2 YOU WILL SEE >
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< THAT THE KEYS ARE SIMPLE SWITCHES. >
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< CONNECTED TO A GROUND AND TWO >
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< DIODES ON THE OTHER END. THESE >
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< DIODES ARE USED TO SIMPLIFY THE >
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< CONSTRUCTION OF THE KEYBOARD >
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< BECAUSE OTHERWISE THE DISTRIBUTION >
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< OF THE GROUND SIGNAL FOR BOTH VCO'S >
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< WOULD HAVE BEEN DONE MECHANICALLY. >
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< THE DIODE WILL GO TO VCO#1 AND THE >
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< OTHER WILL GO TO VCO#2. FIG-3 SHOWS >
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< THE ARRANGEMENT OF THE KEYS ON THE >
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< KEYBOARD. >
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< >
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<-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=->
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< >
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< BELOW IS A TABLE THAT WILL HELP >
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< YOU CONNECT THE KEYS TO THE >
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< REQUIRED VCO'S POTS. >
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< >
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<-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=->
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< >
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< (-FIG 2-) >
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< >
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<-----!-----!--------!--------!------->
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< ! ! ! ! >
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< TO ! TO ! FREQ ! FREQ ! KEY >
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< POT ! POT ! OUT: ! OUT: ! >
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< ON ! ON ! ! ! >
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< VCO1! VCO2! ! ! >
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<-----!-----!--------!--------!------->
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< 1 ! 06 ! 1700HZ ! 1100HZ ! C >
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< 2 ! 10 ! 1300HZ ! 1500HZ ! 0 >
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< 1 ! 10 ! 1700HZ ! 1100HZ ! E >
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< 4 ! 07 ! 0900HZ ! 0700HZ ! 1 >
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< 3 ! 07 ! 1100HZ ! 0700HZ ! 2 >
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< 3 ! 08 ! 1100HZ ! 0900HZ ! 3 >
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< 2 ! 07 ! 1300HZ ! 0700HZ ! 4 >
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< 2 ! 08 ! 1300HZ ! 0900HZ ! 5 >
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< 2 ! 06 ! 1300HZ ! 1100HZ ! 6 >
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< 5 ! 07 ! 1500HZ ! 0700HZ ! 7 >
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< 5 ! 08 ! 1500HZ ! 0900HZ ! 8 >
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< 5 ! 06 ! 1500HZ ! 1100HZ ! 9 >
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< - ! 09 ! ------ ! 2600HZ ! X >
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< ! ! ! ! >
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<-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=->
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< >
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< REMEMBER THAT IN FIG-2 IT'S THE >
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< SAME FOR EACH KEY EXCEPT THE "X" >
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< KEY, WHICH ONLY TAKES ONE DIODE. >
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< >
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<!><!><!><!><!><!><!><!><!><!><!><!><!>
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< >
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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+ +
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+ AS A FINAL WORD YOU CAN BUILD +
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+ THIS IN ANY TYPE OF ENCLOSURE AND +
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+ SHOULD NEVER BE USED TO MAKE FREE +
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+ CALLS USING THE TELEPHONE LINES, OR +
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+ ANYTHING ELSE ILLEGAL. +
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+ +
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+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
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[5] Tfiles: (1-23,?,Q) :
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G-file from.. MATRIX [908-905-6691] -*-
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