Belt Valley times. [volume] (Armington, Mont.) 1894-1977, 1926-01-21

the output circuit could the effect bs
noticed.
There are only about a dozen leadI
TO make. No soldering ia necessary
The Orbit toroId coils were used in
the set; also air-gap sockets.
List Of parea.
Two tuned radio-frequency trans.
formers (toroids) Liz. L4I5.
One variometer. L3.
One crystal detector. CD (carborun-
dunn.
Two audio-frequency transformers.
Att. AFT2 (Acmel.
One %-ampere ballast resistors, RI.
Three sockets (alr-gap).
Two COOS mid. yernier variable con.
densers. with dIals, C1C2 u. S. Tool
One single circuit jack or two phone
tips il.
One sh-Inch dial (for .variometer).
One A battery switch.
One by 2l-Inch panel.
One cable cord.
One Dashboard. by 10 by Y.
Accessories: Bus bar. mounting for
crystal detector. batteries, phones, an
tenna. ground and lead-In wire, etc.
The shaft OF the variable condenser,
CT. that shunts the secondary OF the
antenna coupler. Ii. passes through
hole 3.i6 inch In diameter, which Is
OK inches from the left-hand edge OF
the panel. and 3h inches from the top
and the bottom. Lay the template
over this hole and then drill the hold
ing holes according to those laid out
upon the template. The same policy
Is followed with the other variable
condenser. The hole through which
the shaft OF the variometer L8 passes
Is 10k Inches from both the right
and the left-hand edges. II is also 81
Inches from the top and the bottom OF |
the panel. The hole for the shaft Of !
the last variable condenser is 81
inches from the right-hand edge and |
BIZ inches from the top and the bot
tom Of the panel The hole for the /
nlament control switch. s, Is 10K |
inches from til right and the left
hand edges Of the panel. II Is Y inch /
from the bottom of the panel. This
necesaitates cutting away small bit
Of the dashboard. The holes for the
screws, which hold the Dashboard, are
best located by the builder. as these
depend upon the thickness Of the base
board. etc. I used a comparatively
hin board and therefore had to place
he screws very near the bottom OF
he panel.
We have now automatically placed
he variable condensers, varlOmeter,
,oard aud switch. Angle irons are
Used to mount the coils onto the con-
IenserA These condensers have spe-
iai provisions for mounting the coils,
which are placed at right. angles to
ach other. The set OF plates OF one
artabIe condenser runs in the oppo-
lite direction TO the other set Of
lates. That Is. one condenser is
counted upside down. This was done
0 that the coils could conveniently be |
counted II the c0ndensers are {
counted In the regular fashion It Will q
e difficult to mount the coils.
The transformers are mounted at /
ght angles to each other. The crys- I
Il detector, which is OF the fixed type, Z
as special type Of mounting. You 4
annot ft It into q grid leak holder, d
} Il Is too small. Therefore take a Il
afr of mountlngs and bolt them to- {
sther, seeing when doing so, that &
le crystal fits into the holders. You d
zen have a perfect holder. This Is r
len screwed down 10 the Dashboard d
nd the crystal is fitted into the clips. I
here was no jack used when this q
( was constructed. although one Is r,
own In the diagram. A pair Of phone ii
lps. mounted at the extreme right Of
9 set, were used. No large binding
st strip Is used A battery cable was
ed instead and attached TO the prop
points. p
Wiring the Set y
The beginning Of the primary wind fe
{, II, goes TO the antenna post on "a
e small terminal strip. The end of o.
E same winding. II. goes to the end. q
1ding post The end Of the second 10
y IL winding goes 20 the O post on q
rkef !. and 20 the stationary plates q
the variable condenser. OF. The be- ~
y