MFJ hamProAudio MFJ-654 Instruction Manual Download Page 26 | Manualshive

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J-654 hamProAudio

TM

Microphone Equalizer/Conditioner

Instruction & Technical Manual

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Summary of Contents for hamProAudio MFJ-654

Page 1: ...AUTION Read All Instructions Before Operating Equipment MFJ ENTERPRISES INC 300 Industrial Park Road Starkville MS 39759 USA Tel 662 323 5869 Fax 662 323 6551 COPYRIGHT MMVI MFJ ENTERPRISES INC C Mode...

Page 2: ...tional handbooks or other official publications The copy of this manual provided to the customer will not be updated to reflect current data Customers using this manual should report errors or omissio...

Page 3: ...17 e HEADPHONES 17 f RADIO AUDIO 17 7 THEORY OF OPERATION 18 8 MFJ 654 EASY START INSTRUCTIONS 20 9 IN CASE OF DIFFICULTY 23 10 TECHNICAL ASSISTANCE 23 LIST OF FIGURES Figure 1 Front Panel Jacks and...

Page 4: ...Heil series of Boom Mic Headsets or even provides phantom voltage on the tip for the MFJ 393 Boom Mic Headphones or on the ring for use with a computer Boom Mic or Boom Mic headset These features are...

Page 5: ...have to hunt for an adapter to switch between 3 5 mm or 1 4inch stereo phone jacks Microphone audio is fed out through the RJ 45 connector through the 3 5 mm Auxiliary Output or through a separate 3 5...

Page 6: ...ophone 2 RJ 45 Microphone Input Jack Accepts the input from a standard RJ 45 Microphone 3 Compression Level Controls the Compression function from no Compression to 15 1 maximum Compression 4 Equalize...

Page 7: ...either use your Microphone direct out or through the MFJ 655 in 13 Power ON OFF Switch Cuts the power to the unit on in or off out Top Rows 14 50 Hz Cuts or emphasizes lowest speech frequencies 15 100...

Page 8: ...stereo headphones The test audio is mono fed into both sides of the phones The radio audio is what your radio puts out Handy if you have a Main and a Sub receiver 4 Headphone Ouput Same function as nu...

Page 9: ...mpedance 5 Header 6 This header allows the phantom voltage set by header 4 to be passed to the ring of the Auxiliary input jack Default is off If used with standard computer microphone headphones set...

Page 10: ...ne 3 Jumper 4 Microphone Audio Input Place a jumper on the pin number that corresponds to the pin that supplies microphone audio 4 Jumper 5 Pass Thru This allows you to pas any other lines from the mi...

Page 11: ...install jumpers as indicated If that does not work please refer to the radio manual to identify the MIC pin assignment for you radio then follow the instructions given at the end of this section in t...

Page 12: ...kes or errors in the information provided Receive Audio is taken from the Headphone Audio Output Figure 6 ICOM 8 Pin Modular Microphone Setup Figure 7 YAESU 8 Pin Round Microphone Setup YAESU 8 Pin Ro...

Page 13: ...Output Figure 8 YAESU 8 Pin Modular Microphone Setup Figure 9 KENWOOD 8 Pin Round Microphone Setup KENWOOD 8 Pin Round Microphone Setup TS 50 60 140 430 440 450 570 660 670 680 690 711 780 811 850 870...

Page 14: ...diagram may cover some other radios in the Kenwood product line with 8 pin modular microphone jack If there are any Questions concerning the information provided please refer to your RADIO INSTRUCTIO...

Page 15: ...ic ptt JP9 rad audio 1 X 2 X 2 X 4 X 5 X 6 X X 7 X X X 8 X X Table 1 Sample Jumper Settings Table for Yaesu FT 1000 Series UNLISTED RADIOS To make a jumper table for an unlisted radio you must look at...

Page 16: ...n every lead EXCEPT numbers used on HD 2 4 7 and 9 The following blank table is for your personal use Use your radio s manual to complete the table This will assist you in properly setting the jumpers...

Page 17: ...7 Pin 8 Alinco MIC AUDIO PTT DOWN UP 5 VOLTS AF OUT MIC GND GND Icom MIC AUDIO 8 VOLTS UP DOWN SQL PTT PTT GND MIC GND Kenwood MIC AUDIO PTT DOWN UP 8 VOLTS NC MIC GND PTT GND Yaesu FT1000 FT847 UP G...

Page 18: ...The required power connector is a 2 1 mm ID 5 5 mm OD coaxial power plug As this is a quality audio unit use of an unregulated wall power supply transformer is not recommended as the unloaded voltage...

Page 19: ...he functional diagram of the SSM2166 Input signals below Vde set by The Downward Expansion control on the front panel are downward expanded that is a 1dB change in the input signal level causes a 3dB...

Page 20: ...ignals are made softer and the quietest signal are boosted this reduces the overall dynamics of the signal but this also makes the output appear louder to the ear Bypassing the Output Transformer All...

Page 21: ...Gain Control until the readings on your radio s meter are the same with the unit either on or bypassed 8 Turn the Equalizer on and adjust the Input Gain until the reading are the same with the Equali...

Page 22: ...of word intelligibility Frequencies from 500 to 1000 Hz contribute 35 of word intelligibility and 35 of sound energy Frequencies from 1000 to 4000 Hz contribute 48 of intelligibility but has only 4 of...

Page 23: ...by rotating the 400 Hz knob to 9 to 12 o clock Use the bypass switch to compare Always adjust the output level to maintain proper output to your radio Second increase your speech energy above 1000 Hz...

Page 24: ...n equipment is connected together but do not have their grounds well connected The use of Daisy Chain grounding techniques can contribute to this problem The use of a single point ground is always rec...

Page 25: ...J 654 hamProAudioTM Microphone Equalizer Conditioner Instruction Technical Manual 24 Schematic Equalizer...

Page 26: ...J 654 hamProAudioTM Microphone Equalizer Conditioner Instruction Technical Manual 25...

Page 27: ...g 4 This warranty is NOT void for owners who attempt to repair defective units Technical consultation is available by calling 662 323 5869 5 This warranty does not apply to kits sold by or manufacture...

Page 28: ...MFJ 654 Manual Version 1A Printed In U S A 300 Industrial Park Road Starkville MS 39759...

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