MFJ MFJ-9219 Скачать руководство пользователя страница 11

MFJ-9219

QRP Tuner, Wattmeter, & Dummy Load

Instruction & Technical Manual

5

TECHNICAL ASSISTANCE

If you have any problem with this unit first check the appropriate section of this manual. If the
manual does not reference your problem or reading the manual does not solve your problem, you
may call MFJ Technical Service at (662) 323-0549 or the MFJ Factory at (662) 323-5869. You will
be best helped if you have your unit, manual, and all information on your station handy so you can
answer any questions the technicians may ask.

You can also send questions by mail to MFJ Enterprises, Inc., 300 Industrial Park Road,
Starkville, MS 39759; by Facsimile (FAX) to 662-323-6551; or by email to

[email protected]

Send a complete description of your problem, an explanation of

exactly how you are using your unit, and a complete description of your station.

-8-

Содержание MFJ-9219

Страница 1: ...QRP Tuner Wattmeter Dummy Load MFJ 9219 INSTRUCTION MANUAL 2020 MFJ Enterprises Inc 300 Industrial Park Rd Starkville MS 39759 P 662 323 5869 F 662 323 6551...

Страница 2: ...l 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 omissions re...

Страница 3: ...IONS 5 3 SYSTEM SETUP 6 4 SYSTEM OPERATION 6 4 1 THERMAL WARNING 7 5 TECHNICAL ASSISTANCE 8 List of Figures 1 Horizontally polarized Electromagnetic Plane Wave 1 2 The Electromagnetic Spectrum 2 3 The...

Страница 4: ...erted into signal by the radio The term electromagnetic field refers to the electric and magnetic environment existing at some location due to a radiating source such as an antenna Figure 1 Horizontal...

Страница 5: ...d radiation visible light ultraviolet radiation and the entirety of the FCC spectrum allocation chart The RF part of the electromagnetic spectrum is generally defined as that part of the spectrum from...

Страница 6: ...etermine an unknown resistance in a DC circuit but also works to determine unknown impedances in RF circuits Several variants exist but the one used in the MFJ 9218 can be simplified to the circuit sh...

Страница 7: ...R2 Rx Rx R3 1 Finally if we extend our source to include AC or RF potentials and replace Rx with a load such as an antenna we can write Equation 1 in terms of reactances to get VBD V0 Z2 Z1 Z2 Zx Zx...

Страница 8: ...enna match The compact and efficient T network will match just about any load and has a bypass in the event it is not needed Finally the resistive wattmeter is coupled to a 20W dummy load that is enga...

Страница 9: ...s ready to operate Figure 6 MFJ 9219 Basic Setup 4 SYSTEM OPERATION Operating the MFJ 9219 is accomplished in two broadly defined stages First set the SWR Wattmeter for your radio and antenna Second e...

Страница 10: ...position Adjust the TRANSMITTER and ANTENNA controls for the lowest SWR Continue this process until the lowest SWR cannot be repeated then use the INDUCTOR switch to increase the inductance by one swi...

Страница 11: ...323 0549 or the MFJ Factory at 662 323 5869 You will be best helped if you have your unit manual and all information on your station handy so you can answer any questions the technicians may ask You...

Страница 12: ...USER NOTES...

Отзывы: