Specifications

Multiband Antenna:
A doublet antenna
135 feet long, center fed with
open-wire feeders 67 feet long, can be matched
using the accessory balun on 80 through 10
meters. The feeders make a good 160 meter ver-
tical when connected together and to the
BALILW
(1:l or 4:l) terminal of the balun
TO MATcmm I "lw~-r+I 1
NETWORK
BALILW (1:l or 4:l)
*
8010 METER CONFIGURATION
(POS 31BAL ON MN2700) ~ , -
TO MATCHING
160 METER INVERTED 'L'
(POS 4/UNBAL ON MN2700)
. -= :-- .
~, . -
. .
. .
.c.-, . , ."A': -. .- >:
- ,.=:>.-
--
* .< -,< , .:s. <:*.-:. : :;.: . 1 . . ~..*I,- .- I
:. - .:< .~ .~. -
. ..
.. -.F-. .'
" .'.* 2 .a - , 3, &+,:: .. ,* ?..'.' z-' jl:: - . =
. -
&*I. ~ 2 : " .
. . -.--. ~.. -
Fig. 3-3 Multiband Antenna
--.. -.
CAUTION
An antenna or a dummy load MUST
be
connected to the MN-2700 before energiz-
ing the transmitter to avoid damage to
the matching network and the
transmib
ter. Initial tuning must be done with low
transmitter power. Final small ad-
justments may be made at full power. Do
not change any switch positions under
high power.
Preset the operating controls as follows:
BAND Switch: To desired band
Resistive Tuning: To
5
Reactive Tuning: To 5
Resistive Range:
To
o - 10
Reactive Range:
To
o - 10
VSWR Set Control: Fully Counterclockwise
Meter Switches: To VSWR READ
Energize the transmitter, apply low power to the
matching network, adjust the transmitter plate
tuning to resonance, and adjust loading to
minimum
(max. capacity). The VSWR meter should
read upscale.
Vary the RESISTIVE tuning until the
VSWR dips. If there is not enough tuning range to
dip the VSWR, switch
in or out theresistive range
capacitor as needed to dip the VSWR. Then turn the