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838
RADIO BROADCAST ADVERTISER
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this |
season j
Bring g
control of |
high |
resistance to g
the panel J
DURHAM |
Variables 1
Panel Mount $1.00 Standard 75c
Always a one-finger control and now at your finger-ends— that's the new DURHAM Variable. The familiar ease and accuracy of these standard high resistance units in their latest form may be placed anywhere on your panel, preferably near the tube they
Both types in three
sizes No. 1001000 to 100,000 ohms No. 1010.1 megs, to 5 megs. No. 201A2 megs, to 10 megs.
This style fits any clipped condenser 75c or DURHAM Bases, 30c-45c
control. Only a Y\" hole j
required. §
For most hook-ups, you'll j
need two DURHAMS— |
detector and audio; with §
resistance coupled amplifi j
ers, one for each tube. |
Look for the plunger |
The Patented DURHAM |
combination of sliding plung |
er and non-wear compound is 1
your protection and guaran j
tee for accurate, noiseless |
high resistance control. |
DEALERS: Get this! j
Order from jobber now speci §
fying type, panel mount and I
standard. =
I DURHAM 6 CO.Jnc.
1930 Market St., Philadelphia
.^H M ! M I i n M U I n 1 1 M M M I H M M 1 1 1 M M M N I M M M I H I U M 1 1 M I! M I M i I M I M 1 1 If It I M M I il M 1 1 1 M 1 1 1 M 1 1 L 1 1 1 U L M M 1 1 1 ( I U I r
ii
THE TUBE WITH A PEDIGREE"
RADIO tube is only as good as its characteristic curve reading. We furnish with each MUSSELMAN CERTIFIED TUBE a curve sheet showing the exact readings for that particular tube. Both tube and curve sheet are serially numbered, so that you, or any engineer, can check our figures. Remember this point: That a characteristic curve reading is the only way anyone can measure the value of a radio tube.
List: $3.00. If your dealer cannot supply you, order direct from this advertisement.
jobbers, manufacturers, and dealers are invited to write for details as to sales franchise.
Manufactured by
The Van Horne Co., Franklin, Ohio
SALES OFFICE
A. J. MUSSELMAN
602 Machinery Hall Chicago
Affording a plug and socket connection between the radio set and all outside connections, Jones Multi-Plug is as essential to the radio as a cord and socket to the electric iron. For safety and convenience, leading set manufacturers have adopted this item as standard equipment. You, too, need a Multi-Plug for the set you are building or the set you now have. See your dealer or write direct for descriptive folder F.
TYPE BM — For set Building — $4.50 TYPE BP — Adaptable to any set — $5.00
HOWARD B. JONES CHICAGO, ILL.
MUISH&LUG
THE STANDARDISE^ CONNECTOR
^ Tested and approved by Radio Broadcast -fc