PS Magazine - MARCH 1982
PS, The Preventative Maintenance Monthly
ISSUE 352
MARCH 1982
Antenna Mismatch .±²
groundeD
antenna is nO match for yOur receIver
transmitter (RT).
And, that mIsmatch can
KO
your
set. The bad antenna takes the RF
sigNal yOur RT seNds ±±± aN² sends i³
riGh³ BaCk± THe ´Efleµ³Ed siGNal OVe´-
pOwE´s ³He ¶T's ci´cUits±
Some trOOps thiNK they're saving
·ncle Sam mOney by repairing a
broken anteNna. ¸f it hits a tree limb
and several IncHes Of the tOp section
shatter, they smOOth it Off and put ON a
tIP.
Trouble is, this shOrtened antenna
is mismatche¹ wIth the RT. ºven If a
sIgnal gOes OUt, it WOn»t gO as far. MOst
likely, a lOt of ¼hE sigNal will re³urn tO
°
the RT's final amplifier anddamage it.
¸n the lOng rUn, yOU"ll save mOney
by replacing damaged antenna sec½
tions.
YOu get anOtHer mismatch When
the antenna is grOunded tO the vehicle.
Like the M¾5 ¾ trUck¿À WindshielD Or a
ÁÂtank tUrret.
The metal shOrtstOps the signal and
sends it right bÃck tO tHe RTÄs amp.
A prOper tIedOWn per yOu´ antenna
and radio TM's Will Keep the antenNa,
and you, Out Of trOuble.
YOur signal takes anOther BeatiNg if
you let yOur RT's ASÅ1729 antenna
crOss yOur RÅ442
Æ
receiver antenna.
¸f tHey crOss, each time yOU key ³he
RT yoÇ're keying tHe receiver, tOOÈ
ºven if receiver circuits can stand the
blasÉ, yOUr reµeptiOn wilÊ suffer.
Tighten PVS-5 Knob
The ´Ota´y sWi³ch KnOB On yOU´
AË/ÌÍSÎ5 NigH³ visiON gOggles µaN
WO´k lOOse aN² fall Off if yOU ²<Ïг
Keep it ³igHt±
TigHteN tHe se³screWs BefO´e yOU
use ³he gOggles± THe sOµKetÑHead
screw Key yOU Need fOr the ³igHteNinG
jOB is s³Ore² iN tÒE casÓ±
47
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