Heathkit T-2 - Scan 10

fro
R MA Color Code on Transformers
I.F. TRANSFORMERS
Blue - Pl a t e Le a d
Red-B + L ea d
Green - Grid
Blaek - Ground or A V C
If nt• r tapped o t her g rid is gr e en a nd bl a ck stripe.:
AUDIO TRANSFORMERS
lltu .. - Pl a t e L e ad
a .. d-B + L e ad
Drown - O th e r Plat e on Push Pull
Gr .. en - G rid L ea d
Bln<'k - Gr o und Le a d
Yf'llow - O ther Grid o n Push Pull
POWER TRANSFORMERS PRIMARY - BLACK
High Yoltage Plate - Red
Ce nter Tap Red and Yellow Striped
Rectlfter Filament - Yellow
Ce nt er T a p Ye.low and Blue
J< ' llament No. 1- Green
Ce nt e r T a p Green and Yellow
J<'llam .. nt No. 2- Brown
Ce nt e r T a p - Brown and Yellow
J<'Jlament No. 3 - !'late
Ce nt e r T a p - Slate and Yellow
Soldering
The most important thing in good soldering is to heat the joint and allow the solder to fl-ow into it. The solder should melt
cont ac t with the joint rather than with the iron . Never use pastes or acids in radio work.
Use only rosin core solder. Never depend on the solder to hold a joint. Always make a firm connection with the wire
fore appl yi ng solder . To tin a soldering iron (soldering cannot be done with the bare copper) file the surface lightly while the
iron s hot and then quickly apply a generous amount of rosin core solder while the filed surface is still bright. Wipe off excess
s er wit h a cloth.
Tin all four sides of the tip in this manner.
The terminals must be clean, and preferably tinned . On some terminals that arc hard to solder to (nickel plated f.i.) it is
de rable to pre-tin the surface before installation or connection. Clean (scrape or sandpaper) the surface, heat with iron and apply
r cor e solder liberally . Wipe off or shake off excess solder .
Recommended Tools
File. Round and flat types.
A good electric soldering iron (100 watt with small tip}
Long or needle nose pliers 6".
Diagona l or side cutting pliers (5" or 6").
An assort ment of screw drivers flat and Phillips type.
Purchase quality tools and you will enjoy and use them many years.
American Beauty soldering irons, Plomb, and Williams pliers arc
recommended.
Symbols Used
in Radio Circuits
T
ANTENNA
#
VARIABLE
*
QUARTZ
OR AERIAL
CONDENSER
CRYSTAL
J_
CHASSIS
_L_+
ELECTROLYTIC
+
CONNECTION
OR GROUND
CONDENSER
OF TWO WIRES
--
.-
SHOWING POLARITY
-
~
AIR CORE
0
+
NO
COIL
\
SWITCH
CONNECTION
=1L
AIR CORE
0
0
ROTARY
TRANSFORMER
o\
SWITCH --v-'--
FUSE
OR COIL
0
~
R.F. CHOKE
luuJ~
SPEAKER
r::::=:F=O
PHONE
PLUG
FILTER OR
$
IRON CORE
METER
K
-
1000
-
--'00060lT'-
CHOKE . . .
JlllL
IRON CORE
--®-
PILOT
M=
1,000,000
TRANSFORMER
LIGHT
-..fW./\Nv-
FIXED
--vi
PHONE
_()_
OHM .
RESISTOR
JACK
-..N\/W\J\r-
VARIABLE
SUPPRESS~PLATE
RESISTOR OR
\, ;/\N\IVV\ SCREEN
MF
-
MICROFARAD
1'
-
POTENTIOMETER
GRID J ~
-H-
~ VACUUM
MMF
MICRO
FIXED
~ TUBE -
CONDENSER
CATHODE
-
MICROFARAD
.r-=-J. <" FILAMENT
THE HEATH COMPANY
•
BENTON HARBOR, MICH.