San Antonio light. [volume] (San Antonio, Tex.) 1911-1993, 1925-10-11

bind in the holes, and charging the
holes slightly with a file if neces
sary. The larger condenser (.O005) is
on the left MS you face the set.
Now for the Dashboard.
The photograph, taken from above,
shows plainly the arrangement Of the
parts on the board. Mount the aerial
coil with its terminals nearest the con-
denser. The radio transformer at the
end Of the board is the 3 IL ratio one.
The 8 to 1 transformer is nearest the
binding post strip. Be sure you do not
get them mixed, as the quality of the
set may be seriously affected, and
some transformers carry no markings
excepting a tag indicating the ratio.
Turn them at right angles as in the
picture.
Radio readers of The Light who
have constructed sets in the past viii
almost have had the set built by the
time they have read this far. For their
benefit, the schematic diagram of the
set is published. Other readers will
need assistance.
PLACING SOCKETS.
Mount the coils and transformers,
screwing them into the wood. Now
for the sockets. Mount the first,
third and fourth sockets with the plus
and minus terminals toward the panel.
Turn the second, or detector tube so
that the plus and minus terminals
point toward the jacks, the plate and
grid to the aerial end Of the set. On
the grid binding post, marked &C."
mount tho Grid nnp1anear NTH ifc so.
companying leak"
Take the binding post strip. Saw
off the section holding the first two
posts, aerial and ground, and mount
these as in the photograph. directly be-
hind the aerial coil. Mount the larger
section as in the picture, with The
plus b amplifier" post nearest the
two transformers. These strips ar.
screwed directly to the rear of the
Dashboard, the inside ends of the bind
ing posts coming just above the wood.
Remember. the panel has not yet
been attached to the Dashboard. Do rs
much of the wiring on the set as
possible before screwing the panel in
position, RS many of the connections
are hard to reach after the panel is in
place.
THE FILAMENT CIRCUIT.
Take the panel first. On the first
condenser you will notice four screws
which fasten the stator, or stationary
portion of the condenser to the rotor.
or rotary portion. These screws make
contact with the moving plates through
the aluminium end plate. Facing the
rear of the panel, run wire from the
upper inside screw on the outside con.
denser, over the second condenser and
attach to the nearest binding post Of
the first rheostat. This rheostat con.
trolls the current in the radio fire.
quency tube, the one nearest the aerial
and ground posts. The other rheostat
operates the detector tube and two
audio frequency amplifiers.
Run wire from the second bind
ing post of the radio frequency rheo-
stat to the second or outside post Of
the second rheostat. Then lay aside
the panel for the time.
o CONNECT TERMINALS.
Next run a wire along the inside
edge of the Dashboard, the two ends
connecting the positive binding posts
Of the first and last tube sockets.
Run leads from the positive posts of
the two other sockets and connect to
the main lead. In the same way con-
meet the minus terminals OF the last
three sockets. The positive lead must
now be connected to one side Of the
filament switch, the other terminal Of
the switch being connected directly to