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RADIO BROADCAST ADVERTISER
319
P
Shielded Tuned Radij Transformer, No. 30
SICKLES
DiamondWeave Coils
THE new Sickles Shielded Tuned Radio Transformer prevents both outside and local interference. It is remarkably compact, sharp tuning, sturdy. Sickles Diamond-weave coils have established an enviable reputation for low distributed capacity, low dielectric losses, and large range of frequency with small variable capacity.
The ideal coil for the Naald Localized Control Tuning Unit and for the Truphonic Catacomb Assembly. There are Sickles Diamond Weave Coils for all Leading Circuits.
The F. W. Sickles Co.
132 Union Street -X SPRINGFIELD, MASS.
COIL PRICES
No. 30 Shielded Transformer. . . $2.00 each
No. 24 Browning-Drake 7.50 Set
No. 18A Roberts Circuit 8.00 "
No. 25 Aristocrat Circuit 8.00 "
★
ACCURATUNE Illuminated Dial
Its simplicity and efficiency has overwhelmed the real radio fans. Its positive friction grip insures absolute smooth action.
Graduated from 0 to 100 or reverse. Sold in three ways.
Recording Dial $2.00
(Ratio 10 to 1) With Micrometer control 2.75
(Coarse ratio and 200 to 1) Illuminated extra 50
Sent direct if your Dealer cannot supply you
MYDAR RADIO COMPANY
3 Campbell St. Newark, N. J.
"Pioneer Mfrs. of Micrometer Dials"
After Having America's _ Railways Over 20 Irears lying to know now, Radios inn
Protected by
JRACH
LIGHTNING
ARRESTEES *
Gives the SET SWITCH Control of Trickle Charger and "B" Substitute — AUTOMATICALLY.
No need, now, to operate three switches every time you turn on or off vour set. The Brach CONTROLIT makes this unnecessary by eliminating all extra switches and placing complete control of your power plant and set in the set switch. At the same time it makes any Radio a light socket power-operated set
Anyone can install a CONTROLIT — no extra wiring or altering is necessary.
PRICE $6 in U. S. A.
^207
in the / lead f
Radio Products
L. S. BRACH MFG. CO.
Newark, N. J., U. S. A. Toronto, Canada
-fa Examined and approved by Radio Broadcast -A"