The Ely miner. [volume] (Ely, Minn.) 1895-1986, 1926-01-15
Wiring the Ser.

used instead and attached to the prop
er points.
Wiring the Set.
The beginning OF the primary wind
Ing. III. goes to the anteDna post on
the small terminal scrip. The end OF
the same winding. IL. goes TO the Gnd.
binding post. The end of the second
airy ID winding goes to the G post on
socket ]. and to the stationary plates
of the variable condenser. CT. The be-
TO the rotary plates of this variable
condenser, CT, and to one terminal of
the resistance RI Now with the vari-
ometer you may have some difficulty
when wiring up. Most have binding
posts, but some, such as the one that
was employed in this set, have none
at all. If the latter case prevails,
scrutiniZe the variometer very care
fully. See where the beginning of the
stationary winding goes to and also
where the end of the rotary winding
goes TO. In most cases the stator wind
the rotary end to the other frame.
Neither of these frames, of course, Is
electrically connected. After finding
these connections place small tags on
them. The rotary winding will ter
inmate at the front of the variometer
while the stationary winding will ter
inmate at the back. The rotary wind
ing terminal goes to the p post on
socket /. The stationary winding goes
to the beginning of the primary L3 Of
the second RIFT. The end goes to the
BIZ 40 ~ of the cable. The begin
ming of the secondary winding L5,
goes to the variable plate Of the vari-
able condenser. CO, and to the B II post
on the audio-frequency transformer
ATT. The end of this winding goes
TO the stationary plates of the same
variable condenser and also to one ter
minal Of the crystal detector (high po-
tential marked A on the carborundum).
The other crystal goes to the p post
of the audio-frequency transformer,
AFT1. The F. post on socket /.
goes TO the other terminal of the re-
sistance, RI. The G post on Att
goes to the G post on socket 2. The
F. post on the transformer goes to
of Ii went to, or to one terminal Of
the resistance, RI. The F. post on
this socket goes TO the F. post on
socket /, and also 3. This common
lead goes to one terminal of the re-
sistance. This means that the resist
ance Is in the negative lead of the fila
ment. The post on the socket 2 goes
to the p post on AFT2. The BIZ
post on this socket goes to the BIZ
81 y volt cable lead (2). The G post
on AFT2, goes to the G post on socket
3. The plate. post on the same socket
goes to either the top terminal of the
single circuit jack or to one terminal
of the phone tips. The F+ of this
socket goes to one terminal of the fla
ment control switch, S. The other ter
minal of this switch goes to the Abb
cable lead. All the Fl leads from
the sockets are common. All the grid
returns are placed in the negative lead
of the A battery. No G battery Is
employed, although the same may be
used. If you desire to use C bat
terry, break the two leads that come
from the post of the two AFT. and
bring the same to the c. lead of the
G battery. The CT lead goes to the
A. lead.
Simple to Operate.
This receiver is very simple to OPP
crate. The only trouble that you may
come up against is the difficult con-
trolling of the oscillatory flow of the
RE tube This is due to the fact that
many variometers will not oscillate
over the complete broadcast band
small 20-turn coil placed in series with
the plate circuit of this same tube will,
cure this Ill. The two condenser dials
should tune In step. Don't forget to
reverse the leads of the crystal dctec-
tor, In case the signals are not loud
enough Also reverse the A battery
leads. A 10O-foot antenna should be
used. The ground should be nude to
tho old faithful water pine.