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WHEN IT COMESTO ANTENNA SYSTEMS...IS YOURS
a space problem? a budget problem? an applications problem? an installation problem?
or simply a problem of where to buy?
You r one-stop so lution is A NTENNAS, INC.
E xcl usively special ists in rad ia t ing systems, comp lete systems o r any c o m p o ne n t part.
Arrays-complete o r in kit form, qu ads, yagis, d ip o le assemb lies, verticals-fi xed or m o b i le, towers,
masts, ro tors, guy a nd contro l cable, t ransm iss ion line, C03X re la ys a nd swit c h es, c o n nect o rs and
adaptors, t est gear, technical publ icat ions , corrosion resistant h ardwa re , c o rro sio n proofing c hem icals,
i n sulat ors, insta l lation and w ir ing hardware, aluminum ·tubing and plate, w ire, and much , mu ch more.
If y o u r requir ements are for a complete sy stem, major components, or the smalles t yet im p o rtant
piece of h a ro ware -,
Our prices and deliveries are hard to bea t . . . any w here.
ANI [NNAS INCDept. B, 512 McDonald Ro ad ~~Te~~~~~: ~~~ ~~:;f~~':;U~~:;:~~: :
[ , • Leave nworth, Kansas 66048. 52.00, refu ndable, first o rder . -
directl y to th e phone wires. Instead, put a
sma ll electrolytic capacito r in both leads,
right at the attachment poin t. The capacitance
of these should be 2 or ,4 flF each,
and polarize them right so they block t he
de on t he line. Th is is done by finding out
which phone wire is positive, and connecting
the positive lead of one of t he electro­
Iyt ics to this phone wire, and conn ect the
negat ive end of the other cap acitor to the
other phone line. Now, connect the two
patch wires to the two dangling ends of the
electrolytic capacitors. You can now short
~ME
2 M ET ER
Put a NEW RECEI VER in your old hi - band set
for lell than t 17.0 0 (or the nex1 best 1hing I.
PRE-AMPS
the patch, leave it on , etc, and you will not
load the phone enough to cause more than
a small decrease in its loudness.
A 2 flF capacitor is about the bes t value,
since this causes an effective 1 uf total
series capacitance in the pa tch line, which
cause s a 3 dB cut off freq uency of 300 Hz
on th e 900n line. T his is an op timum
match to an SSB receiver. If you decide to
use the se manproofing capacito rs, install
them before yo u calibrate the audio gain
for patch inje ct ion , for better accura cy.
. .. W4NVK-
H F -
NEW
144 U'*
fj[ffi'Qi~~~f5om
, PERFORMANCE
/ \
SUPERIOR
from
MOS FET RF Preampl ifi er
your old set
your 1971
model
AN TE NNAS
LARSEN
Typical IBdb gain 3db na'ise figure
t.e intermod/ Hi burn -eut 1tlreshold
Ki1 Wired
HF - 14 4 DGK - --- ----- - - - - - - - - $9.50
HF -144 U f or Universa l use --tl l .50 t 16.50
HF - 14 4 M for Mat r ac radi03 - - - - - - --- t 16 .50
HF - 14 4 R far Regency HR- 2 - - 110.50 t 16.50
PLE ASE ADD 6 01l! FOR POSTAGE At-[) l-WIDUN G
NEW
HF-1 4 4 RPS. . 3 9 .50
Regula1 ed DC power supply far ~R - 2
WRITE TODAY FOR OUR FLY ERS WITH DETAILED
INFOfl MATI a N AND PRICING OF PRODUCTS SHOWN.
Cu_sJa _,,-~
~
HIGH PERFORMANCE VHF YAGIS
TOPEKA
F M ENGINEERING
3501 CROCO ROAD
TOPEKA , KANSAS 66605
(913) - 233 -15 80
FEBRUARY 197 1 79