Vertex Standard FT-950 Dokumentacja Pobierz pdf (Strona 2)

From March 2008 QST © ARRL

PRODUCT REVIEW

Mark J. Wilson, K1RO



Product Review Editor



[email protected]

Key Measurements

Summary

Reviewed by Norm Fusaro, W3IZ

Assistant Manager, Membership and

Volunteer Programs Department

Before the official opening of the JARL

Ham Fair in August 2007, hidden under a

black veil, Yaesu’s latest player in the mid

priced transceiver market waited for its

introduction to the world. This is where I

first saw the FT-950, the HF and 6 meter

amateur transceiver that is being touted as a

“baby FT-2000.”

The FT-950 may be a scaled down ver-

sion of Yaesu’s workhorse transceivers

but it certainly is not stripped down. With

100 W output on all amateur bands from 160

to 6 meters, general coverage receive, built-in

automatic antenna tuner and a host of other

features found in competition class transceiv-

ers, there is no doubt that this new radio will

fill a void in the company’s product line and

in the hearts of radio amateurs looking for big

rig performance in an economical package.

First Impressions

When the FT-950 is sitting side by side

with the FT-2000, the inherent resemblance

is striking but the similarity doesn’t stop at

facial features. The ’950 is packed with many

of the QRM-fighting and signal-enhancing

features that many operators have come to

know in the FT-2000 series and in Yaesu’s

flagship FTDX9000 series radios.

For

example, the FT-950 includes digital noise

reduction (DNR), which uses a variety of

algorithms to separate signals from noise. It

also has a CONTOUR control, used to enhance

the desired signal and distinguish it from

noise and interference.

The FT-950 is also capable of using

optional accessories such as Yaesu’s Data

Management Unit (DMU-2000) to provide a

graphic image of the rig’s operation. It’s also

got provisions for adding optional µ-Tune

units, precision motorized preselector circuits

that can enhance a weak signal or attenuate an

interfering signal.

I used the optional µ-Tune

units with the ’950 and they had an obvious

effect on received signals. Not being located

near a strong broadcast station or other source

of interference, I was unable to fully appreci-

ate the preselector’s performance.

Noticeably smaller than its big brother,

the FT-950 is still a substantial piece of gear

that makes a nice statement when sitting

on the operating desk. One reason for the

smaller form factor is the absence of an

internal power supply. This can be a benefit

to some people because many operators

already own a power supply that is used

to run several pieces of gear in the shack. I

found that the ’950 worked fine using a big,

heavy 35 A Astron analog supply or when

juiced with a lightweight Yaesu FP-1023

switching supply.

Weighing in at 21.6 pounds, the FT-950 is

not what many would consider a “portable”

rig, but with all of the big rig features in a

smaller package I would consider this a re-

markable field radio to be used in a variety

of situations such as DXpeditions, Field Day

or EOC operations. The front and rear feet

Yaesu FT-950 HF and

6 Meter Transceiver

The FT-950 HF/50 MHz trans-

ceiver fills a void in Yaesu’s product

line. It should appeal to radio ama-

teurs looking for big rig performance

in an economical package.

QST Product reviews, including the FT-2000,

FT-2000D, FTDX9000D and FTDX9000 Con-

test, are available on the Web at www.arrl.

org/members-only/prodrev/.

The DMU-2000 and µ-Tune units were discussed

in more detail in the FT-2000D Product Review

in October 2007 QST.

-20

-70

Transmit 9th-order IMD (dB)

-35

Transmit 3rd-Order IMD (dB)

-35

-56

-40 +35

-40

+35

110

2 kHz 3rd-Order Dynamic Range (dB)

20 kHz 3rd-Order Intercept (dBm)

2 kHz 3rd-Order Intercept (dBm)

110

140

128

129

+21

+16

-4

140

20 kHz Blocking Gain Compression (dB)

2 kHz Blocking Gain Compression (dB)

20 kHz 3rd-Order Dynamic Range (dB)

T-R

Tx-Rx Turnaround Time (ms)

80 M

20 M

Dynamic range and intercept

values with preamp off.

Intercept values were determined

using –97 dBm references.

Key:

pr028

-20

Bottom Line

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