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Sylvania Radio Tube ''Firsts^
SYLVANIA POWER MEASUREMENT TUBE
MEASURING
RADIO FREQUENCY POWER
MORE ACCURATELY
New Sylvania Power Measurement Lamps provide a simple and more accurate means of measuring radio frequency power.
At present there are six "lamps" in the Sylvania PM series. Resistances range from 40 to 3 10 ohms over the useful ranges of the curves.
A PM Lamp, used with a meter readily available to most radio experimenters, eliminates much of the guesswork that prevailed with old methods. Sylvania PM Lamps, which are no longer restricted to military use, should be useful to radio experimenters.
The research and development of the PM series is just another example of how Sylvania engineering succeeds in solving radio problems. Like Sylvania Radio Tubes, criterions of quality, the new Power Measurement Lamps are manufactured to one standard — the highest anywhere known.
OTHER SYLVANIA RADIO TUBE FIRSTS
Sylvania was first to introduce a line of 6.3-volt radio tubes and to propose their universal use in not only automobile but home receivers. This contribution standardized radio tube voltage, simplified service and stocking, and eliminated transformers in AC-DC sets.
Sylvania was first to introduce a line of 1.4-volt tubes, which made the portable camera-type radio possible. This radio tube halved portable radio battery weight — a boon in war and in the peace to come.
Quality that serves the war shall serve the peace
RADIO DIVISION
EMPORIDM, PENNSYLVANIA
SYLVANIA
ELECTRIC PRODUCTS INC.
IIADIO TUBES. CATHODE RAY TUBES, ELECTRONIC DEVICES, FLUORESCENT LAMPS. FIXTURES AND ACCESSORIES. INCANDESCENT LAMPS