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RADIO BROADCAST ADVERTISER
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Find this out
before you choose your radio frequency transformer
DOES it have marked depressions and peaks in its amplification range curve between 200 and 600 meters (indicating absence of amplification at the depressions) — or does it keep the amplification range curve uniform with its maximum efficiency around 360 meters — the place you need it most.
A test
THE two charts above tell a graphic story of tests made on radio frequency transformers in the laboratories of a well known concern. The chart at the left plots the amplification range curve of 12 Acme R-2's taken from stock. The chart at the right represents a composite plot of the curves of 6 ordinary types of different makes taken from stock. The superiority of the Acme R-2 is self-evident. Note its steadily increasing amplification curve with its maximum at 360 meters — just where it is most needed.
Getting greater distances
EQUALLY important is the greater distances over which you can get broadcasting when using the
Acme R-2. The R-2 used in a radio frequency amplifier builds up wave energy before passing it on to the detector. You hear signals that would ordinarily be inaudible. Even the simplest and most elementary type of set, either vacuum tube or crystal receiver type, will have its range tremendously increased when the Acme R-2 is employed in conjunction with a vadium tube.
Acme R-2 Radio Frequency Amplifying
Transformer. Price $5. (East
of Rocky Mountains.)
The best method
To SECURE maximum results over long distance use both Acme Radio and Acme Audio Frequency Transformers. This insures maximum sensitivity and intensity, quietness in operation and freedom from distortion. A small indoor antenna or loop may be used and sufficient intensity obtained to operate the Acme Kleerspeaker, providing perfect entertainment for a roomful of people.
You can get these and all other Acme Products at radio, electrical and many hardware stores. Write for booklet R-2 showing proper hook-ups and other information.
THE ACME APPARATUS COMPANY, Cambridge, Mass., U.S.A.
New York, 1270 Broadway Pioneer transformer and radio engineers and manufacturers
for amplification