T EVIS i - AmericanRadioHistory.Com

--
104
NO WONDER THE TREND'S
TO CERAMICONS®
Compare ERIE size with
other types of capacitors _
Size ... Ceramicons are small
enough that they fit in any space.
This compactness makes replacement
of any type easier with the
correct Ceramicon.
Stability ... The rugged construction
makes Ceramicons impervious
to moisture and even
the most severe climatic conditions.
Price ... Ceramicons are equal
or lower in price than corresponding
values of paper or mica
capacitors.
G UY-I
WIRE j
CLAMP
Model GC -3
Clamps on mast with a sure grip
accommodates mast to 2" O.D. Features
3 eyebolts for guy wire attachment.
Model GC -1 . 12 holes for guy wire
attachment. Accommodates masts to
11/2" O.D.
Model GC -2 . similar to Model
GC -I with 2 eyebolts for guy wire
attachment.
South River Antenna Mounting Accessories
are carried by every leading TV
Parts Jobber from coast to coast.
Write for your copy of our new
1953 catalog. --_J11
i
ERIE
dual s zes
GP2L 1000 MMF
PAPER .001 MFD
MICA .001 MFD
ERIE components are stocked by leading electronic distributors everywhere.
ERIE
CORP
**NEWS**
SOUTH RIVER METAL
PRODUCTS CO., INC.
SOUTH RIVER, N. J.
PIONEER AND OUTSTANDING PRODUCER
OF FINEST LINE OF ANTENNA MOUNTS
ERIE RESISTOR CORPORATION
MOM Offices. ERIE, PA.
E(ICIIONIC5 DIVISION
Solo, O.:n, Cla,ide, N.J. Philadelphia, Po. IORab, N. Y Chkoeo. Ill.
Deno, Mh Cincianol, Ohio lo, Angele,, Coll
lv,r.ei lall, PA, LONDON, ENGLAND TORONTO. CANADA
ELECTRONIC'S LATEST
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A compact-completecircuit
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THE AMAZING
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A precision engineered professional quality electronic
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l'IIECKS: sync, sore's. video. audio circuits. TV
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udnent+,
SPECIFICATIONS:
RF A AF Signal Tracer, RC Ar Signal Injector. AC
a DC Voltage Indicator O '60.550 20.000. DC Polarity
Indicator 60 SSO. 20.000 volts. Lo ohms 0.5. Hi
1hms 0- 500k -20 megohms. Tests condensers .00025
2 mtd.. Tests Resistors 2 s -20 m goems. 2 Capacitance
Sub ranges 01 -.1 h i 4-40 mid.. 3 Resistance
Sub ranges 50.500 ohms. 55.295. 100k-1 meg.
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A MUST FOR THE MODERN TV AND ELECTRONICS
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LEE ELECTRONIC LABS., INC.
Dept. RN4
233 Dudley Street Boston 19. Mass.
6 -Band Mobile Unit
(Continued from page 46)
Next, go to 75 meters and adjust
the slug of L2 until the oscillator hits
2 mc. with the plates of C., unmeshed.
Throw S, to 40 meters and adjust C2,
so that the v.f.o. is at 1.75 mc. when
the plates of C, are fully meshed. Adjust
the slug of L. to peak at 3575 kc.
L should then be tuned to 7150 kc.
Switch back to 75 and peak L,2 at
3850 kc. Finally, recheck each of the
previous adjustments in order to
make certain that the proper amount
of final grid current is available on
each band.
After alignment has been completed,
the dial may be calibrated.
The printed scale of the National
MCN dial should be reversed and four
semicircles drawn on the blank side.
The 75 -meter band, from just below
3.7 mc. to 4 mc. will cover one
of the semicircles and the 10 -meter
band will cover most of another.
The 40 -meter band can be allotted to
the third semicircle, while the fourth
one will have adequate space for the
11 -, 15- and 20 -meter bands. The values
of Cm through C,., and C10 are such
that the three latter bands win not
overlap one another on the dial scale.
When installing the rig in the car,
it will pay to run separate fused leads
from the battery to the tube heaters,
and from the battery to the genemotor.
If a common lead is used, the
relatively heavy current drawn by the
genemotor will produce a drop in
heater voltage whenever the transmitter
is switched on. The lowered heater
voltage, in turn, will cause a drop in
tube cathode temperatures which will
reduce grid drive to the final and may
produce a slight see -saw frequency
shift of the carrier. This latter effect
results when the elements near the
cathode of the oscillator tube are at
Fig. 8. Details of the mounting cradle.
1---1
HEAVY
6112
BOLT
ALUMINUM PLATE
(LENGTH DEPENDS ON
DIMENSIONS OF CARI
12 ti%
iaSTEN ALONG
NDERSIDE OF DA
V4" PLYWOOD
CROSSPIECE
ix 2"
ALUMINUM
WOOD PIECE
BRACKET
9'
BOLTED TO
FIREwALL
TRANSMIT TEF
CRADLE 1
(A)
;O
O /PIECE OS
RINGÑU7S
11021
pEE0EE®
CRADLE
(BI
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