JFD Electronics Corporation Log-Periodic LPV TV Antenna
November 1962 Radio-Electronics

November 1962 Radio-Electronics [Table of Contents] Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Electronics, published 1930-1988. All copyrights hereby acknowledged.

If you believe the claims and the radiation pattern plots and graphs presented in this 1962 Radio-Electronics magazine advertisement, then JFD Electronics had a pretty nice television antenna. Per the data, reception gain was nearly perfectly flat across the lower channel band (2-6) and across the upper channel band (7-13), corresponding to 44-82 MHz and 174-210 MHz, respectively. That is the VHF (very high frequency) band. Model LPV-11 is featured in the image and the data. It was an 11-element log-periodic antenna with "9 Active Cells and 2 directors," with an effective range of 100 miles. The ultimate model was LPV-17, with "15 Active Cells and 2 directors," and a range of 175 miles. That's a long way for picking up a TV station, but the high gain is also useful for much closer, weak signal regions. UHF (ultra high frequency), covering channels 14-83, occupied the 470-884 MHz band. 1962, the year of this article, is the same year that the All-Channel Receiver Act which compelled manufacturers to include UHF reception on all new TV sets. In typical bureaucratic fashion, that forced consumers to pay for a feature they did not demand nor particularly want or need. The only show I remember watching on UHF was Bob Ross (a career USAF medical technician) painting "happy little trees" on PBS.

JFD Electronics Corporation Log-Periodic LPV TV Antenna

Revolution in the Air: JFD Presents The Log-Periodic LPV

Initially Developed by the Antenna Research Laboratories of the University of Illinois*, Proved-Out In Air Force Satellite Telemetry, Adapted to TV by JFD-Ending the "Era of Compromise" in TV Antenna Design

It could only have been produced by such massed resources as those of a prominent university, the military, and the country's leading antenna manufacturer.

Because its gain is independent of frequency, the backward-wave log-periodic LPV functions with high efficiency across the entire band. This end-fire array is comparable on any channel to a tuned Yagi cut to that channel.

On virtually every count, it outperforms previous wide-band arrays: in gain, in directivity, in bandwidth, in front-to-back ratio. It has gains as high as 14 db. in the 17-element model. It shows flat response across both TV bands - with greater gain on the high band, where it's needed most. Result: An all-channel, all-purpose antenna with unprecedented gain, a decisive end to snow and ghosts and the truest color reception yet - as well as vivid sharpness in black and white. The basic log-periodic LPV principle will be also adapted to all future UHF antenna needs.

More, far more, than just a "fringe" solution, the log-periodic LPV gives superior reception in all multi-channel areas. It is the first true "universal" TV antenna. It will open key profit opportunities to you in the months ahead - not only because it puts better reception within the reach of virtually every TV set-owner, but because it enables you for the first time to meet all antenna needs with a single antenna line.

Not a "catch-all compromise" - the log-periodic LPV signals a halt to the endless piling-on of narrow-band elements and parasitics. It is essentially frequency-independent since it is derived from an antenna geometry that repeats the electrical properties of the basic element, or cell, periodically; the periodicity being proportional to the logarithm of the frequency. (Actually, the basic log-periodic design is capable of flat response over a frequency range as broad as 20 to 1.)

Based on principles designed to meet rigorous Air Force performance standards - built to uncompromising JFD specifications - of AAA† Gold Bond Alodized aircraft aluminum for enduring good looks.

100% preassembled Flip-Quik construction - with new "tank-turret" aluminum brackets that align and double lock the elements instantly and permanently in place.

Receives stereo FM, too - delivers drift- and distortion-free FM stereo.

See the Log-Periodic LPV at your JFD distributor - study the performance figures - try it-see for yourself how the LPV towers over all other broad-line antennas.

JFD the Brand that Puts You in Command of the Market

JFD Electronics Corporation

6101 Sixteenth Avenue, Brooklyn 4, N.Y.

JFD Electronics-Southern Inc., Oxford, North Carolina

JFD International, 15 Moore Street, New York', N.Y.

JFD Canada, Ltd., 51 McCormack Street, Toronto, Ontario, Canada

557 Richards Street, Vancouver 2, British Columbia

† Attractive, Anti-corrosive Armor

* Produced exclusively by JFD Electronics under license to theUniversity of Illinois

U.S. Patent Numbers 2,958,081 - 2,985,879 - 3,011,168 Additional Patents Pending

One Basic Configuration Satisfies All Needs:

Harmonically resonant V-elements operating on the Log-Periodic Cellular Principle in the Fundamental and Third Harmonic Modes: