Fixing signal problems 

When reception trouble is reported, it's not always easy to find the cause.

Field Report: Marti STL-20C 

When STL transmitter and receiver products kept coming up short, we turned to the new, high-power STL-20C.

Shaping radio today and tomorrow 

The PR&E ADX, IBOC at NAB1994 and radio listening habits.

Running interference 

WOR has encountered many positive results during its transition to IBOC. These tests were used to gather data on nighttime interference.

Environmental, ground system problems 

As the FCC continues to delete mandatory measurements and checks from the Part 73 rules, some unintentional traps are opened for the unwary engineer.

Digital Radio in 1994, John Battison in 1931 

1994: The EIA and NRSC review seven DAR systems at NASA's Lewis Research Center in Cleveland. Also, On the air in 1931 and a llok at listener loyalty.

Building a better radiator 

As public rejection of tall towers has increased, radio engineers have been paying more and more attention to AM antenna design requirements in an effort to develop shorter AM antennas that are as efficient as their taller brethren.

Field Report: SWR Illumitron 

KKXS, Shingletown, CA, improves its signal with a new antenna. Read about it in this review.

Often-forgotten FCC rules 

Ignorance of the rules is not a valid excuse when an inspector comes calling. Here are some of the frequently overlooked rules.

Shaping radio today and tomorrow 

A look back at the Philips DCC, an increase in high-speed Internet access, and 10 Years of Radio looks back at the IBOC tests of 1994.

Legacy equipment 

Why buy new when the existing equipment still works fine? Keep some of that vintage equipment running right.

Standing waves and antennas 

When problems of abnormal VSWR occur, they generally result from mechanical or electrical damage due to the transmission line or antenna, and frequently to heavy ice formation on the antenna.

Shaping radio today and tomorrow 

DAB from January 1994 | The debut of the Wheatstone A-300 | Satellite radio subscriber projections

Say goodbye to the weakest link 

Now that the FCC has accepted IBOC, we will see even more improvements as sites are updated with digital exciters and solid-state transmitters. With all of these advances in technology, don't overlook what can become the weak link: the method used to get the audio from one location to another.

Test your RF system 

Modern equipment is stable and reliable, but some things should be checked on a regular basis.

Digital radio launched 

In October the Commission announced procedures that allow AM and FM stations to immediately begin interim IBOC digital transmissions on a voluntary basis.

Motorola Symphony Digital Radio 

A look inside the radio chipset that promises improved reception without the costs of digital transmission conversion.

Shaping radio today and tomorrow 

The oldest transmitter in daily use | Crown | S-DARS awareness

DA maintenance 

With the FCC's reduced logging requirements, there is no excuse for a directional array not to have adequately written maintenance logs.

The folded unipole 

The fundamentals of the folded unipole have not changed much since 1952, but experience has provided several improvements as well as some weaknesses.

Multitenant towers 

The use of somebody else's tower can be attractive, but before rushing into a contract with an existing tower owner, consider all the problems that can occur.

Simple solutions for a stress-free system 

A robust transmission system is one that provides superior signal and audio quality, and provides this superior product even in adverse conditions.

The Right Choice in transmitters 

There are several factors to keep in mind when it's time to select a new transmitter.

Diplexing AM transmitters 

When vertical real estate is at a premium, diplexing AM stations may offer an cost-efficient alternative.

Lightning protection 

with proper engineering precautions, towers can survive intense lightning attacks.

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