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RADIO BROADCAST ADVERTISER
267
T R i Ml fc^
Ente |tainer
(TZRIMM Entertainer is v-^a quality speaker at an intermediate price. The large Trimm Unit may be adjusted to give desired tone and volume. Volconite horn stands 19 finches high, has a bell 12 inches in diameter. The Entertainer is one of the biggest values in radio because it gives the satisfaction and performance of highest grade speaker at a truly reasonable price. Order a sample from your jobber for trial.
TRIMM
Superior Reproducers
HEADSETS Professional $5.50 Dependable 4.40
PHONODAPTERS Giant Unit $10.00 Little Wonder 4.50
SPEAKERS Home Speaker Entertainer Cabinette • « Concert Chello
_ n EADI® MANUFACTURING
To unscramble the stations
The New AMSCO Allocating Condenser (S.L.F.) spreads the stations evenly around dials. Eliminates the crowding of low wave stations and simplifies tuning. And unlike previous straight line frequency condensers, its "half-a-heart" rotor plates save space in the cabinet. Three sizes— single or Siamese.
To get the finest tuning
The New AMSCO Vernier Dial is as easily installed as an ordinary dial — and as easily manipulated. But— each turn of the dial is stepped-down to l-13th the motion— giving finesse to your fingers. A precision instrument, without momentum or back-lash. There is no vernier like it for distance-getting. Low in price.
Ask your dealer for these and other AMSCO Engineered Radio Products . . . Everything in Condensers, Rheostats, Potentiometers, tube sockets, dials, etc.
Amsco Products Inc., Dept. e
Broome and Lafayette Streets, N. Y. City
Makers of the Melco Supreme Radio Receiver
Make your set a Super -Het
THE circuit described in Radio Broadcast for June and August will change any set into a super-heterodyne. It is particularly applicable to five-tube neutrodyne and tuned RF sets. It changes these two circuits into super-heterodynes as good as most, and considerably better in some respects than any super-heterodyne circuit ever devised.
Stations come in at but one point on the oscillator dial. There is mathematically no possibility of harmonics. Full scale blue prints with reprint of article $1.00.
Eastern Coil antenna coupler $6.00
O'Connor oscillator coupler 6.00
Special fixed condenser 60
Complete parts including panel, drilled and engraved, special formica
bushings, screws, and wire, blue prints and reprint 37.50
* A. O'CONNOR & COMPANY
Super-Heterodyne Headquarters Since 1923 9702 Euclid Avenue .... Cleveland, Ohio
•Jf Tested and approved by Radio Broadcast -fa