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MFJ MFJ-8504, Instruction Manual

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MFJ MFJ-8504 Instruction Manual Download Page 1

Summary of Contents for MFJ-8504

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Page 2: ...multicoupler This broadband coupler has excellent performance over a very wide frequency range from below 300 kHz to above 500 MHz This is a low noise gain neutral device It employs modern low noise...

Page 3: ...1 7 MHz 5 pole High Pass and 30 MHz Low Pass and High Pass 5 pole filters The filters can be set up in multiple ways for specific needs The user must calculate the values and make his own non standar...

Page 4: ...ke mixers This can cause signals to combine and make phantom signals appear The only solution to this problem is to reduce the input signal level for some or all signals The ideal input level is one w...

Page 5: ...D5 No Filter 1 YES YES NO NO 1 TO 4 FL 1 ONLY 1 NO NO NO 2 TO 3 NO FL 2 ONLY 1 YES NO 1 TO 2 NO NO FL 2 ONLY 2 NO NO 2 TO 3 NO NO FL1 AND 2 FL 1 1 FL 2 2 NO NO 2 TO 3 2 TO 3 NO FL 1 AND 2 IN SERIES 1...

Page 6: ...ifier stage For example setting the 30MHz Low Pass filter in FL1 and the 30MHz High Pass filter in FL2 an HF antenna can be connected to ANTENNA 1 and a VHF antenna on ANTENNA 2 Two Filters in Series...

Page 7: ...Schematics MFJ 8504 Main Board High Pass Filter Low Pass Filter Notch Filter Band Pass Filter...

Page 8: ...8504 1 PCB 862 8504 HP 862 8504 LP 30MHz Low Pass QTY Part VALUE PN Desc 2 C1 C2 100pF 220 0100 CAPACITOR MULTILAYER 1 50V 5 NPO 100 PF 2 L1 L3 0 47uH 401 2470 INDUCTOR MOLDED 3 10 YEL VIO SLVR 0 47 U...

Page 9: ...G type capacitors for minimum drift and with a lead spacing around 0 1 or 0 2 inch Voltage is not critical Suggested parts values for individual Amateur Bands Low Pass High Pass BAND Freq LP L1 C1 L2...

Page 10: ...NOTES...

Page 11: ...eceive the original parts you wish to replace your proof of purchase and a personal check cashiers check or money order must be provided to cover postage and handling Postage and handling may vary acc...

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