Ramsey Electronics FZ-146 Specifications download pdf (Page 16)

FX 146 • 16

MICROPHONE & SPEAKER INFORMATION

The FX transceivers with the hardware supplied are designed to accept

standard ICOM or ICOM-compatible speaker-mikes such as MFJ-284. The

most conveniently available such unit is Radio Shack No.19-310.

Be aware that the receiver audio amplifier is capable of supplying a husky 2

watts or more of audio power and will drive full-size communications

speakers to excellent volume levels.

The PTT switching circuit can be activated simply by introducing a

resistance (e.g. 10K) from the microphone input to ground. This resistance is

enough to trigger the PTT circuit without interfering with the microphone

audio input.

Consider these factors in selecting microphone, speaker and/or speaker-

mike for FM voice operation. If your microphone and speaker preferences

differ radically from the use of a speaker/mike, and you do not wish to alter

the front panel, remember that you also have very easy access to mike and

speaker lines via J1, the packet connector.

A FEW ANTENNA CONSIDERATIONS

The idea of building your own transceiver is to save money and enjoy your

hobby. Effective VHF and UHF antennas are easy and inexpensive to build,

whether for fixed or mobile use. There are plenty of off-the-shelf antennas to

buy, but don't hesitate to "roll your own."

If you are a newcomer to ham radio, you'll discover many strong opinions

about the "best" antenna to use. A home-built ground plane vertical or even

a dipole can provide very satisfying results. Whether you need a gain factor

or directivity in your antenna depends on your operating goals. Regardless

of the style of antenna, it really pays to give serious attention to electrically-

solid, weatherproof connections of the coaxial cable to the antenna

elements. A simple antenna in good condition will outperform a fancy one

that's been neglected.

Popular ham magazines and ARRL publications provide plenty of antenna

building ideas. MFJ Enterprises offers good value in simple ready-to-use

antennas for 2 Meters.

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Ramsey Electronics FZ-146 Specifications Page 16