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RADIO DIGEST — Illustrated
October 6, 1923
AN ULTRA AUDION SIMPLEX DIAGRAM
"A" BATTERY
B" BATTERY
THE circuit shown in the above diagram is by no means a new one but it has numerous good points that make it especially attractive for the new fan. Not only is it an extremely efficient form of circuit, but its simplicity and low cost make it an ideal receiver. A I
apparatus required is one tube socket, one rheostat, one variable condenser (.001 mfd.) preferably with vernier, a variable grid leak and grid condenser (panel mount unit was used) on variometer, and eight binding posts.
A dry cell tube can be used if desired;
as a single wire not over 60 feet long is sufficient. If a longer aerial is used the condenser capacity may have to be reduced to .0005 microfarads.
Get Advice Before Purchasing
Anyone having little technical knowledge on the subject of radio should take some experienced friend's advice before buying any piece of apparatus.. If this is not possible, he should purchase articles made by companies having a recognized standing in the field and whose engineers are capable of giving the best in design.
TUBES $5.30
UV-199, UV-201A, WD-11, WD-12, DV-6
Guaranteed Firsts in Original Packages
ELECTRIC SOLDERING IRON, A.C. or D.C.S 2.24
$45.00 Magnavox. Type B-3 $26.25
5.00 Erla Keflex Transformer 3.95
4.75 All Amer. Trans., 10-1, 5-1 or 3-1 3.95
1.50 Gold Grain Detector 95
1 .00 B-Metal Detector 78
5.00 Bakelite 3 Coil Mounting 3.45
4.00 Bakelite 2 Coil Mounting 2.85
1 2. 00 Baldwin Type C Phones 9.65
6.00 Baldwin Type C Units 4.95
8.00 Brandes Superior Phones 4.85
3.00 Large 22% V. Tapped B Batteries 1.95
6.00 Large 45 V. Tapped B Batteries 3.85
•fa inch Formica Paneling, per so. in. I'/ic
40.00 Amrad Reflex: Set No. 3366 29.50
6.00 Moulded "Variometers or Variocouplers. 3.95 RUSH YOUR ORDERS— SEND FOR FREE LIST
ROBERTS RADIO COMPANY
3101 Leland Ave., Dept. D Chicago
ISc Lettered binding posts, complete, set eight, 60c; two sets, $1.00. Prepaid, same day. Stamps accepted. Everything in Radio. Ask for quotations. List for stamp. Kladag Radio Laboratories, Kent, Ohio.
RADETEC Si=I
FIXED DETECTOR
CAN BE
READJUSTED
Gives clearer and greater
volume than other detectors
,FOR
REFLEX AND CRYSTAL
SETS
From your dealer or direct
TOWNER RADIO MFG. CO.
1
1
2620 VICTOR ST.,
KANSAS CITY. MO.
What About It?
Isn't it about time to stop experimenting with multiple control circuits and build one that, combining ease of assembly and operation, loudness, clarity and selectivity of signals, as well as beautiful appearance, is excelled by none?
THE ELGIN SUPER-REINARTZ
RADIO RECEIVING SET
Embodies all the advantages of the well known Elgin Reinartz (the set which was largely responsible for the popularity of this wonderful circuit) and many others. It is much louder, more selective, requires no storage battery, and can be used with excellent results on a short or loop aerial.
It has brought in California stations two thousand miles from Elgin, clearly and without interference on a loud speaker with only one tube, and that while our powerful local station was broadcasting three miles away.
Could you ask for more?
Write for circular giving one, two and three bulb hook-ups of this remarkable circuit IT IS FREE.
ELGIN RADIO SUPPLY CO.
207 East Chicago Street ELGIN, ILLINOIS
"We > Repair Your
C-301-A $3.50 each
UV-200, C-300, AP Detectors.. 2.7S each UV-Z01, C-301, AP Amplifiers. 3.00 each
DV-6, DV-6-A 3.50 each
And Guarantee Them Equal to New
OUR NEW 6V 'i AMP. DE q.A , A
TECT0R AND AMPLIFIER $**. 1U
This Tube Is a Revelation — Fully Guaranteed
QUICK SERVICE— Include with your order remittance to cover repair plus parcel postage tor one pound per tube. All orders shipped C. O. D. unless accompanied by remittance plus postage. If preferred, tubes will be returned C. O. D. repair charges.
•SPECIAL
high.
LOUD SPEAKER, nickel-plated— 21'
Undistorted reproduction.
Regular Price $15.00
Our Price 9.50
Shipped prepaid. ABALENE RADIO, 14 Vesey St., New York. N. Y
two stage audio frequency amplifier is easily attached.
The other illustration shows an assembled set, mounted on a 7 by 9 inch panel with a 5 by 7 inch baseboard. The
the B battery is 22% volt recommended, but this can be increased if UV-99 or C-299 tubes are used. As the diagram indicates, the wiring: is very simple.
The aerial need not be a very long one
Lettering Bakelite Panel
To letter a bakelite panel, clean the surface with wood alcohol to remove any greasy film, then write what you want on the panel with a sharp, stiff steel pen and draftsman's white ink, such as is used on blueprints. When the writing is perfectly dry, cover it with transparent varnish to protect it, using a fine, soft hair brush.
If at any future time you want to remove it, dampen a rag with wood alcohol and wash it off; the wood alcohol dissolves the varnish. — James E. Murray, New York city.
2650 MILES
with ONE TUBE. Broadcasting from Atlantic Coast and Cuba heard in California by users of the CROSS COUNTRY CIRCUIT. This range is due to simplicity of set and operation as only one control is used for tuning. Easily and cheaply built. Dry cell tubes may be used. Complete instructions, with i>anel layout, assembly views, etc., postpaid for 25c. Or further Information for red stamp. VESCO RADIO SHOP, Bx. 117, Oakland, Cal.
Pour the acid (a few drops at a time) into the water when mixing electrolyte for a lead storage cell. Never pour the water into the acid.
"Dutch Radio Valve"
Detector and Amplifying Tubes
Buy the wonderful "Dutch Radio Valve" for your receiving set. They are guaranteed.
6 Volt Detectors $2.50
6 Volt Amplifiers 3.00
3 Volt Guaranteed 3.00
iy2 Volt Detectors 2.50
Mail Orders Solicited. Send bank draft or postal money order.
D. R. V. IMPORTING CO.
515 Orange St. Newark, N. J.
DEALERS: WRITE FOR DISCOUNTS
TRIGGER OF NEW YORK RADIO
EVERYTHING SOLD ON MONEY-BACK GUARANTEE. WE HANDLE NO BOOTLEG MERCHANDISE.
BRANDES $5.25
ROYAL 3.50
COCKADAY
Best parts, complete. *io e/v
GUARANTEED .J1Z.DU
ERLA REFLEX
One Tube Sets will operate loud <fcOO CA
speaker; guaranteed. Complete parts. ip£i£i.O\J
WONDERFUL I tube set, guaranteed, all assemb
RFUL I tube set, guaranteed, *ie A A nbled $XO.lrU
PANELS, Fine Grade.
7x10 ..$0.85
7x18 1.45
7X14. 7x24.
.$1.25 . 1.90
ATLAS
Loud Speaker.
List $25.
$16.50
Our 2-tube assembled set works &OC AA
loud speaker ip&u.uU
We save you money on anything you buy.
ERLA Kadlo Transformers $4.50
ACME 3.45
KLOSNER 6 & 30 Ohm Itheostat 1.25
TILLMAN 6 & 30 Ohm Eheostat 65
TILLMAN Socket 50
REMLER Socket 60
W. D. 11 & U. V. 199 Socket 50
23 plate Condenser 1.65
43 plate Condenser $1.85
23 plate Vernier 2.85
43 plate Vernier 3.75
D. C. Battery Charger 4.25
ACME Transformer rr. 3.75
AMBASSADOR 3000 Ohm Phones 3.98
CRYSTAL Detectors 45c, 60c, 90c and 1.50
FRESHMAN Vax. Grid Leak & Condenser 70
We carry a complete line. Let us know your wants. Merchandise is shipped IMMEDIATELY, on orders of $5.00. All others please Include postage.
Postage prepaid
TRIGGER OF NEW YORK
160 East 59th Street. Near Third Avenue, New York City