Harris MW-1 Tuning Procedure Download Page 4 | Manualshive

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Summary of Contents for MW-1

Page 1: ...ral guide for trai ned and qualified personnel who are aware o f the dangers inherent in handling potentially hazardous electrical electronic circuits It is not intended to contain a complete statement of all safet y precautions which should be observed by personnel in using t his or other electronic equipment The installation operation maintenance and service of this equipment involves risks both...

Page 2: ... next to the RF driver module A13 e Install CB on RF Driver and PA modules Al through Al3 for transmitters below 1000 KHZ f Install lLl hardware through 1L12 unifonnly using brass g Install ClA through ClJ as required on under side of output network deck Use shorting straps 816 7545 001 to connect each capacitor to the common buss ha in the center of the inductors h_ Install C2 capacitors as requi...

Page 3: ... a peak in RF Driver current the value of ClS will have to be increased Conversely the value will have the be decreased if the RF Driver current is approaching a peak with the slug all the way down c Adjust Ll9 for about 1 3 amps of RF Driver Current Re peak L18 d Turn off transmitter f Reinstall fuses F2 F7 9 RF output adjustment a Turn transmitter on high power Slowly adjust high power control o...

Page 4: ...tance and C23 is 0 capacitance short out one or more sections of Ll using buss wire on the terminal posts provided to enable C22 to null the REL VSWR to zero Re null C20 c Repeat the nulling of C20 and C22 until the REL VSWR nulls at zero 11 If RF driver current is above 1 5 or below 1 0 Amps adjust L19 RF DVR loading control to get the current in range 1 3 amps Re peak the RF Driver current by tu...

Page 5: ... on the PA tuning buss bar and at the transmitter output on the antenna dummy load switch S11 The voltage at Cl should be 70 plus minus St of the voltage at the antenna dummy load plug If this ratio is incorrect shut off the transmitter move the tap on L13 one turn either direction adjust _the HI POWER pot on the Gating and Power Control board full counter clockwise turn on the transmitter t o HI ...

Page 6: ...is adjustment transmitter power lS completed remove all 18 Overvoltage adjustment a Set the DC OVERVOLTAGE and REGULATOR ADJUST pots on the front door fully clockwise Remove fuses Fl F7 on the Gating and Power Control board b Turn on the transmitter to High power PA Volts should rise to 60 70 Volts PA Amps should read 0 If the PA Volt meter pegs immediately shut off the transmitter There is a prob...

Page 7: ...d adjust output power to 1000 watts without modulation Slowly adjust the REGULATOR ADJ pot for 135V on the 140V multimeter position giving transformer T2 time to catch up to the setting The wiper contact on T2 should be in the middle portion of it travel 1 4 to 2 3 travel b If the wiper on T2 is at either extreme turn o f f the transmitt er and retap transformer Tl by moving gray wire 4 either up ...

Page 8: ...ription C17 and Cl8 500 0903 000 2700 pf 500v 500 0881 000 3000 pf 500v 500 0882 000 3600 pf 500v 500 0888 000 3900 pf soov 500 0883 000 4700 pf SOOv C23 500 0804 000 10 pf 500v 500 0803 000 18 pf 500v 500 0811 000 27 pf 500v 500 0817 000 47 pf 500v 500 0812 000 68 pf 500v C19 500 0759 000 100 pf 500v 500 0755 000 270 pf soov 500 0833 000 390 pf 500v 500 0835 000 470 pf S00v 500 0838 000 560 pf 50...

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