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73 Amateur Radio - Free and Open Source Software

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Continued from page 14<br />

The priority watch function can sample any<br />

memory channel. It can also step through the<br />

memory channels, incrementing once each<br />

sample. It'll even do all this while you're scanning<br />

through the band!<br />

All in all, the memory management features<br />

of the FT-411 are the most flexible I've ever<br />

seen , and the operations are surprisingly easy<br />

to do,<br />

Transmitter: Audio reports indicate that the<br />

Kenwood is "oassrer" but more natural, while<br />

the Yaesu is punchier and more "communications"<br />

styled. Output power in the HIGH position<br />

is the same, but the Kenwood seems a bit<br />

stronger in the LOW position. There is no mention<br />

in the Yaesu specs of the output in the LOW<br />

position.<br />

Receiver: The Yaesu has wider cove rage,<br />

and selectivity is better. The Kenwood, with<br />

one of the " hottest" receivers I've ever seen,<br />

makes clear audio fro m signals th e 41 1<br />

doesn't even hear. But comparisons with<br />

other rigs show the Yaesu to be about aver-<br />

"This radio has a ten-number<br />

DTMF autodialer!"<br />

Autodialer<br />

This radio has a ten-number DTMF autodialer!<br />

It stores numbers of up to 15 digits each,<br />

sending them at the touch of a button. If you're<br />

a control op or use an autopatch, it's just<br />

great. The procedure lor entering numbers is<br />

a bit cryptic and could have been done better,<br />

but it's worth getting the hang of it. Especially<br />

for portable operation, this is one feature that<br />

will make you wonder how you ever got along<br />

without it. Of course, OTMF may also be manually<br />

senl.<br />

Documentation<br />

With all these features, some good instructions<br />

are in order, and they are provided. The<br />

book is written in clear English and takes you<br />

easily through the operations. Also, a walletsized<br />

"crib card " set is provided.<br />

Comparisons<br />

I couldn 't help but compare the 411 to my<br />

Kenwood TH-25AT, a rig I just recently reviewed<br />

. Here are some observations:<br />

Mechanical: The Yaesu is slightly smaller<br />

and noticeably lighter than the Kenwood, I find<br />

the front-mounted LCD easier 10 use, though<br />

the top-mounted one on the Kenwood is better<br />

protected from scratches. Both rigs feel good<br />

and solid.<br />

Features: The Yaesu does everything the<br />

25AT does, and lots more. Unique 411 features<br />

include 49 memories, direct frequency<br />

entry, and autodialer.<br />

18 73 Amateur Radio • June, 1989<br />

age, and certainly adequate-any<br />

you can hit, you can receive.<br />

The Kaboom Audio Enh ancer<br />

My principal complaint about this radio is<br />

that the audio output power is just too small , In<br />

addition, the FT-411's speaker has a tinny,<br />

fUZZy quality. There's an easy way, however,<br />

to improve this.<br />

A big part of the audio problem is acoustical.<br />

The interaction of the speaker with the size<br />

and depth of the grille greatly affects the volume<br />

and sound quality. Deliberately blocking<br />

part of the speaker causes a significant increase<br />

in volume, along with a reduction in<br />

fuzziness. The improvement is caused by the<br />

creation of a resonant chamber between the<br />

speaker and the grille front.<br />

Go to an art store and gel a clear adhesive<br />

plastic film with paper backing. If you can't<br />

find this, substitute with wide adhesive tape,<br />

as long as il is fairly thick. Cut out a piece 1"<br />

wide by 13116" long. Cut out from the 1 ~ wide<br />

piece a cen ter piece 3/16" wide by 5/ 1 6~ long.<br />

If you hold the rig so thai you're looking into<br />

the grille from the bottom, you can see the slot<br />

for the microphone in the upper left corner,<br />

and also the vertical center post in front of the<br />

speaker. Wipe the grille with a tissue, peel off<br />

the paper backing from Ihe back of the plastic<br />

film, and paste the film onto the rig with the top<br />

edge centered over the top horizontal sial,<br />

and the hole centered over the vertical post.<br />

The left edge of the film should just clear the<br />

right side of the mike slot. Exact placement<br />

isn't critical. Finally, using your fingernai l,<br />

bend the edges of the film Into the top and<br />

bottom slots.<br />

That's it-the radio will now sound a whole<br />

lot better and you haven't even voided your<br />

warrantyl<br />

Nit-Picks<br />

The manual, while easy to read, omi ts a<br />

great deal. Although a full schematic is provided,<br />

audio output and TX current drain specs<br />

are given at 12 volts, so I have no idea what<br />

they are with normaI7.2-volt battery use (they<br />

should be a lot less). No mention is made of<br />

the lithium battery, nor of how to wire a microphone<br />

for the rig. You can review the contents<br />

Conclusion<br />

This is the most advanced single-band HT<br />

available today. Despite the list of nit-picks,<br />

its bevy of features makes the FT-41 1 an<br />

outstanding value. If you want a powerhouse<br />

of features in your pocket and can live with<br />

the low audio output, this is the rig 01 your<br />

dreams. FJ1

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