We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
March fS9, 192J,
RADIO DIGEST— Hhts f
19
Meditations by the Inventor of King Miloplex
Part XXV— More About the Miloplex Wave Traps
By the Mystery Man
RIDEM, Cowboy! Didja ever hear about the fellow who tried to build a compound wave trap, then came into town riding a mountain lion, with a wild cat under each arm, using a rattlesnake for a whip? Got off at the corner drug store and, with one shot at the vaselined sheik back of the soda fountain, asked for a glass of carbolic acid with a dash of iodine, and a moth ball as a chaser? Neither did I — yet he still lives and Is so tough he uses fresh cotton for lather and shaves with a blow torch — and even dares me to answer one -word of his Q. and A. He wins — you see Digest and "My Gang" need me — so I'm letting Maggie answer him. Believe me, when she starts answering — well, she simply sends it out so hot she -nas to turn down the damper. Let her start one number on her answering broadcasting program, and all of the wave traps this side of our main sulphur supply couldn't tune her out. So beware, Cowboy! If the mailman says he has a letter for you, kneel, sinner, bow down — 'cause when they come to pick up the pieces the committee will sure feel you must have met with a minor accident. Ridem, Cowboy! Let your conscience be your guide. I'll be in Kansas
START
rnirmTm
...iiiiiiimmimiimiimiiiiiiiii
n in in i in i ii it 1 1 in i mi nun 1 1 n ihi ui ii tn
■ i i i i i i i I i i i i I t I i I I r i i I i i i I I t i i i i i I i i t t i t i .
1 1 1 1 I 1 1 i i * i i i i 1 1 1 i i I I I I I I I I 1 I I I I 1 1 1 IJLMJJJU
3 5 10 15
City eating and talking to "My Gang" at the A.R.R.L meet. Just get swept up by the time I return, as the health department is trying to keep our neighborhood clean.
Miloplex Reflex
And now that another teapot dome scandal has been rehearsed, just a word to you who have received my picture and reflex hook-up. Yes, you can have one— you're not too late. Send in your selfaddressed stamped envelope and get yours. Alright, yur wulkum. Get this answer to 314 letters on the King Reflex; it was designed to be used on a loop. How big? Oh, about 2 feet square with 18 turns of number 18 or 20 spaced %-inch apart. Yes, it was also designed so that on the aforesaid loop you could bring in local stations on a loud speaker using but one tube. So mercy, man, don't make me think you are mysterious by writing in
and telling me you can't get stations 200 to 1,000 miles away very loud on your loud speaker. Neither can I, nor the fellow who wrote me he was fj< every night, unless ,ti<m
that automatically broadcasts when it's shut down. Anyway, Mr. Havana, you are to be complimented. Never mind your sending radius — totally close down. I'll still set reports on hearing you, and that's some Cuban prize. No, sirEEE, O. M, if you want real D. X. on the King Reflex use a vario-coupler in place of the loop and ground your minus A. Possibly a few of my circuits work — at least, the audience say they do — but listen: If I ever know enough about Radio circuits and the Iuiik power of a tube to build a circuit using one tube that will bring in 1,000-mile D. X. in loud speaker volume on a loop — well, if I do (who was the dude that invented that word if?) again — I can't resist saying: it again if I do — somebody will have to pay me seven million iron men C.I.F. (cash in fist), and refuse to eat anything but gold fish and sleep in King Tut's spare bedroom, the while giving Maggie, carte blanche and money also. I'll put up a broadcasting station so powerful — well, I'll make the guy that invented "if" cross out the word.
Have you missed "Howler," my dog? I have. You know I think he has been out broadcasting without a license. But he's gone — electioneering, I 'spose. Maggie called him Spot and tried to prove it, but one spot more or less meant little in his howling life, yet I never could understand why they put a guaranteed slip polish on a floor and then covered it with a Turkish rug made in Kalamazoo. How's a dog going to feel homelike when he has to dig his toenails in when making a quick "chase-me party" with the cat? (Will this guy ever cut this out and talk wave traps?)
Don't throw the paper — it's too hard work picking it up again, because here's another trap and it works another trick: If you can wind wire on a coil — even tho it slips and slides and decides to spoil a perfect day — you can still lick it and possess a trap that "will cut out B.C. and spark. Come home 30 minutes early for supper and you can have it finished in time to say "Gimme" when the first dish of corned beefan lands on the pure white.
Winding the Wave Trap Coil
For this trap or filter I'm going to useone of Harry Schwarzberg's spasmodic primary's, a 4-inch tube 3% inches long, a .0025 variable condenser and a chuck of number 22 dec. (or cotton, if you wish) copper wire — sixty turns, or approximaieiy 80 feet in length.
Start the winding one-half inch from one end of the tube, anchoring it in the usual manner. Now watch carefully.
Wind on three turns and bring out a tap at the third; then two more turns and bring
IF YOUR RADIO BATTERY IS BADLY SULPHATED
You can bring it back with an
OHIO
Motor Generator
CHARGER.
Operates -Effectively — Silently — Economically
The Ohio Battery Charging Motor Generator Set will recharge your radio "A", or three-cell automobile battery, no matter how much discharged or sulphated. It is positive in operation, recharges in one-third the time usually required, and cannot charge in the wrong direction. This is a real motor generator set.
SPECIFICATIONS
permit
Capacity, 6-10 volts, 3-20 amperes; automatic; needs no watching while charging. Can not be injured by accidentally shortcircuiting generator leads. Ball bearing Ohio Motor and Generator will run quietly and smoothly thousands of hours without further oiling. Equipped with ammeter and rheostat to
control charging rate. Long leads
plugging in practically anywhere.
Made of best materials; well finished; mounted
on substantial base; weighs 60 pounds.
Regularly equipped with 110 v. 60 cycle A. C
Motor; 6-10 volt Generator.
Equipped for other service if desired; prices on
application.
"If not satisfactory, you may return the set within 30 days and we will return the
full purchase price."
WRITE TODAY We can also furnish double voltage motor generators F F „ to charge "A" batteries at 6-10 volts, .08 amperes, and
PARTICULARS "B" batteries at 50-100 volts, .oy2 amperes.
The Ohio Electric & Controller Company
S918 MAURICE AVENUE CLEVELAND, OHIO
out Knottier tap, this lifting the fifth turn from tho ontlnue the winding up
to tl m, whore an<.
an off, and then continue by
00025
OA
RECEIVER:
■OG
winding on five more turns, which should be the fifteenth when the final tap is taken off, and continue the winding until 4 5 more turns have been added, which is the finish of our wedding-. Is supper ready? No!
Alrlghty — let's look at it. If you I did or doi b did, 'cause I dio
if you have— you should have a coil lirlfiing 60 turns, tapped at the 3rd, 10th and 15th. Atta, boy! Golly — he ga. e us the tuff ones first; this Is as easy as ing tho Btoclc yards In C!> ;<ers for ! lighthouse so they can reflex the wg
Connecting Taps
And now for the and finish hook onto tbi terminals — while the ta 10 and 15 go to switch poinlH. Ti • hook it up la just as easy — look at the diagram; I as clear as rnud.
There now, ilr. Radio Smith, is your trap — ready for assailing up to <oo meters that thinks it by. But what is
it? a big word— sort a like
KOKOLOKA, and means in Radio lanirun <e a QUENCHER, but if I named it Dieest might decide it was free publicity, but if you saw it theoretically described it would be called a conductively coupled auto transformer having an untuned or spasmodic primary and variable ratio of primary to secondary of from 1 to 5* up or down to 15 to 4 5.
More Circuits to Come
With one exception (because there is (Continued on page 29)
All Type*^
fThe Peak
yiimilliiiiwiuiiiiiiiiiiiiilliilllllll ii I milllllllf
of Quality —
PREMIER PARTS
M: Actual Size
"DUOSTAT"
Trade Mark
Two Rheostats in One
Tou will see the advantage of this remarkable new apparatus at once. A real innovation. Think of if! One liigh-class Rheostat that completely replaces two of the ordinary types; does the work even more efficiently, and, in addition, greatly simplifies installation and wiring. One hole to drill. THAT'S ALL. That's what you get in the "DCOSTAT." Two independent resistor windings, each operating one tube. Bakelite Moulded Base, silver etched dial. "N1CHROME" wire windings. Made for all types of tubes. No. 12, two windings, each 7 ohms. No. 13, two windings, each 25 ohms. No. 14, two windings, each 40 ohms. Price all types $3-4)0.
19 Years Making
Quality Electric
Products
J?r*m«»r fotlvit fampuny
3810 Ravenswood
"HEGEHOG"
Trade Mark Reg.
Audio-Frequency Transformer
"We back this little wonder to the limit. For all around efficiency and compactness it is unexcelled (jive it a thorough tryout. Install it in Xeutrodyne, Autodyne, Superdyne, Miloplex, Autoplex, or any of the latest "hook-ups." it for volume, tone quality and consistent performance. Give it every possible test. Then consider its size and price. If you do not find the "HECEHOG" unsurpassed in every way, your money will be gladly refunded. We guarantee it unconditionally. Make this test. Ratios 1 to 3, 1 to 4, 1 to 5 — S3. 50; 1 to 10 — S4.r.Q. Send for FREE Bulletin No. 9S descrihms Premier Quality Radio Parts in detail.
Ask your Dealer for
"Premier"
Parts
CHICAGO
?ill!lllllllllll!llllllU!IIIIIIIIIIIIIIIIIIKIINIIII^
PEERLESS RADIO, 349 Fulton St.
BROOKLYN, N. Y.
Parcel Post prepaid on all orders above $5.00. Express Money Order, Certified Check, Bank Draft accepted; also C. O. D. Guarantee with ail merchandise.
LOUD SPEAKERS ■
Magnavox (new type) $27.25
Music Master 25.45
Pathe (new type) 16.50
Dictogrand 17.95
Strom berg Carlson 17.75
Mercury with Baldwin Unit... 9.95 Natl. Baldwin Type C Unit.. 4.85
Manhattan Electric 22.50
Brandes Table Talker 9.95
Aocusticota Phonograph Unit 9.45
VARIABLE CONDENSERS
II PI. Admiral or Signal $1.35
17 PI. Admiral or Signal 1.60
23 PI. Admiral or Signal 1.65
43 PI. Admiral or Signal 1.75
II PI. Montrose Vernier Cond.. 2.55 17 PI. Montrose Vernier Cond.. 2.75 23 PI. Montrose Vernier Cond.. 2.85 43 PI. Montrose Vernier Cond.. 3.65
II PI. U. S. Tool 3.35
23 PI. U. S. Tool 3.65
43 PI. U. S. Tool 4.10
Single Socket* Neutrodons
Complete Parts for Neutrodyne 5 Tube Set
I 7x26 Panel 2
1 Triple Socket 2 3 N eutrof ormers
2 All American Transformers I Battery Switch
3 4" Dials Fada Type I Power Rheostat I Vernier Rheostat 8 Binding Posts I Closed Circuit Jack
1 Filament Control Jack 27 Ft. Insulated Tubing 27 Ft. Tinned Bus Bar
2 Fixed Conffensers P06 Mfd. 1 Fixed Condenser .00025 Mfd. I Grid Leak 2 Megohms I Diagram for Above Set
Our Price $32.50
HEATH'S RADIAN VERNIER CONDENSERS
13 Plate $4.75
23 Plate 5.25
43 Plats 5.95
VARI0COUPLERS
Fisher, 180' $2.35
Shamrock 2.65
Sleeper, no taps 3.75
Workrite 2.»5
Gillfillan, small 5.95
Gillfillan, large 7.45
Pathe 3.25
Genuine All Wave 5.35
Cockaday Coil 1.85
Unxld, ISO . Bakelite 1.95
VARIOMETERS
Fisher, large. 600 meter $2.55
Shamrock 2.65
Sleeper 5.65
Workrite 2.95
Gillfillan, small 4.05
Gillfillan, lane 7.45
Pathe 2.85
PHONES
Turneys $2.8$
Pacent 3.45
Brandes Superior 4.85
Federal 4-t5
National Baldwin Type C 7.95
Peerless Pbones 3.SS
Western Electric 9.85
Ambassador 3.50
Porter Precision 4.25
Wiener Phones 3.95
TRANSFORMERS
Acme Audio and Radio $ 3.90
All-American (all ratios) 3.90
Federal No. 65 5.95
Modern 4.95
Thordarson 3.95
Erla Reflex and Audi* 4.45
Akracy 3.35
Modern P'tsh-Pull 10.7$
Como Pusb-Pull »0J5
Raila Transformers 3.95
Complete Parts for Ambassador 1 Tube Set
I Ambassador Coil
I U. S. L. 23 PI. Ver. Condenser
I Tillman 6 Ohm Rheostat
I Bell Bakelite Socket
1 .00025 Fixed Dubilier Card.
I 3" Dial Fada Type
I 7x12 Panel
I Single Circuit Jack
6 Marked Binding Posts
12 Ft Tinned Bus Bar
I Diagram for Above Set
Our Price $12.25
Complete Parts for
Erla 1 Tube Set
I Hilco Varloooupler
I Signal 23 PI. Var. Cond.
I Boil Socket
I ERLA Betex Transformer
I ERLA Audio Transformer
I .062 Fixed Dubilier Cond.
I .001 Fixed Dubilier Cnnd.
1 .00025 Fixed Dubilier Cond.
2 3" Dials Fada Tyee
I $ Ohm Tillman Rheostat
8 Marked Binding Pasts
12 Switch Points
4 Stops
I ERLA Fixed Crystal
I ERLA Blue Print
Our Price $19.45
Bell Socket, Bakelite Panel
Mounting $ .89
Amsco 6 ohm Rheostat 95
Amsco 20 ohm Rheostat 1.15
Amsco 30 ohm Rheostat 1.25
Amsco 400 ohm Potentiometer. 1.40 Cutler-Hammer 6 ohm Rheostat. Plain 95
Cutler-Hammer 6 ohm Rheostat, Vernier 1.20
ELECTRAHOT Solder iron... 2.50 New Improved Cockaday Coll.. 5.50
MISCELLANEOUS
Path* Pulsiformers $8-50
New Improved Cockaday
Coils, silk wound 5.50
Cutler-Hammer 30 ohm Rheostat, Plain 1.20
Cutler-Hammer 400 ohm Potentiometer 1.20
Filkostat 1.85
Bradlcystat or Bradleyleek I.7C
Bruno 14 Tap Inductance Sw.. .70 Sta put Phone Plug 35
Phone PUig for 6 pr. Phones. .$1.25 Phone Ptog fer 2 pr. Phones . . .«•
Single Circuit Jacks 3$
Double Circuit Jacks 45
4" Dials. Fada Type 45
3 Dials. Fada Type it
Triple Sockets, Fada Style. . . 2.65 Marked Eby. Bind. Potts. Ea. .IT
Ambassador Coil
Sfceltoo Midnet Vernier.. Freshman Grid Leak t Cond.