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Heathkit HM-2140 User Manual

Heathkit HM-2140
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Page 31
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-::-iis
drop is usually attributed to inherent conditions in some power
~..:pplies,especially those in self-contained transceivers, that is, with all
;:Jwer being internal to the unit. This is a normal condition; neither the
=ansceiver nor the Wattmeter are malfunctioning.
C. Transmit a CWsignal. Turn the SENSITIVITYcontrol and posi-
tion the REF meter pointer to the "SET" index.
If you wish to calculate an exact VSWR, refer to the "SWR Calculator"
shown in Pictorial 5-4 (Illustration Booklet, Page 12). Follow the instruc-
tions on the scale and read the SWR directly from the center scale.
You may use either of two power sources in the Wattmeter, or you may use
both. Werecommend an alkaline power cell, NEDAType #1604 for battery
power, and you may purchase the optional 9-volt Heathkit Converter Model
GRA-43-1if you want to power the Wattmeter without a battery or if you
wish to use both.
When you use the Wattmeter away from conventional AC power sources,
you will need the battery for PEP operation. The battery is easy to install
into the battery holder on the switch circuit board; merely loosen the four
side-trim screws, lift the top cover from the Wattmeter, then plug in the
battery and push the battery down into the battery holder. Replace the
cabinet top cover and tighten the trim screws.
When you are close to a conventional source of 120-volt AC power, and if
you have the Converter, merely plug it into a wall outlet and push the small
plug into switch circuit board jack J1.NOTE:In the HF Dual Wattmeter, the
Converter is used as a Battery Eliminator; it will not charge your battery,
which is disconnected from the Wattmeter circuits when the Converter is
connected to J1.

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Heathkit HM-2140 Specifications

General IconGeneral
BrandHeathkit
ModelHM-2140
CategoryMeasuring Instruments
LanguageEnglish

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