Heathkit GR-78 - Page 28

Pao
oo,
Dipole or invertad—V
Dipole Installation
‘Ay arte 100 ft ong wil give good rceton fom 3 9
18 mapahertz, with the best rection ‘being nes §
mopibartz, Use the following formule it you want to
‘ampute the Ieagth of sm antenna that will have its bot
‘ception at another requney
length eet) =_ 408
Fraeney (nearer ey
‘The llowing materiale nowt for this senna
neato
‘Artana —A length of bare wir, NOTE: The length at
Wire shouldbe slghity longer to allow for festering to
‘th iauotrs, Th finish antenna feng ao be
ety apr the oral
Ladin — RG-SBAU oF RG-17AU cola ala, The
lerth depends upon the Height of your ant ad
‘he loaton of your Receiver.
Ground wie ~ Same type antenna wie. The length
Ciroardt pon the datance between the Receiver ond
‘he gunn uta
Irulators ~ Thee samc OF Yk, approximotaly
2172" ong,
‘Ground rod ~ One B oF 8 fot lengt, 3/8” dame
NOTE: A ground rod is ot red i an trate
‘pound, sch as old water pipe in your houte is used
{tarp — One for ground od.
Lhtningarrter — Oe for a eb
NOTE: Fo dipole italltio,retrto sap 1A through 12.
For iwerted » V pole, ate to stape 1B rough 12.
VA. Locate two supports that te fly high fom the
ground
ao
80
to
100
fet
apart.
One
support
could
be
"Your howe anc th othr poe A dipole antenna can
{be sunpandad between the wo sips HE sO IS
Figure,
Figure 9
1B, Locate vee supports tut are fay high off the
oe
{pound The centr support should be 20 to 100 feet,
‘am the ground and both end supports re 10 feet
from she ound. Nate thatthe ore bwtween the
‘enter support and the antenna wits shoud be over 45
‘erent, An verti V antenna can be suspended
‘wetwen the tvs supports shown in Fic 10,
Cut the anton wir in half, Fasten one ond oF one
‘tet annular. Than fasten ead of he other
‘te 0 the ote of ho sae ator.
Figure 10
eaten the remaining tw fsulators 1 the and of the
antenna wits
Prepare ne aio the lain cable vo thet you wil
ave 0 cone a art 3 hil lod,
Fer to Figate 1 ad ttn te pepurd ed ofthe
table tothe cone insulator fr support). Than sk
‘the center ead ofthe able to the antenna wire on on
fide of the Inala. Solr the sield tothe antenna
Wir onthe othr sd of he lata,
‘Use this tap for liver ~ V dipole only. Fasten the
lao just prepared to the center apport,
Fasten an inulator to sch ond wpport
Route the leadin wire into the howse ot your Racer
Yoeation.