Vertex Standard FT-60R Specifikace stáhnout pdf (Strana 9)

From February 2005 QST © ARRL

SHORT TAKES

The Heil Classic

The Heil Classic is a replica of a 1930 RCA 74B broad-

cast microphone. A few of its more notable features include:

•

Two mic elements easily selected by a miniature back-

panel toggle switch. The elements are partially selectable at

the time of purchase. More about this later.

•

Switchable high and low im1pedance is set by a tiny

bottom-panel slide switch. The Classic is therefore compat-

ible with both vintage tube transmitters and modern solid-

state transceivers.

•

A PTT “Soft Touch” switch on the back panel.

Perhaps the Classic’s most prominent visual feature is its

cast aluminum name flag. Complete the warranty card that

comes in each box and Heil sends you the call letters of your

choice. The letters are plastic with an adhesive backing.

Four possible elements come with Heil Classic microphones.

One is standard issue for all mics. The customer selects the

second element from one of the three remaining options:

PRO LINE: This is a broadcast element with a frequency

response of 50 to 18,000 Hz. It is the standard element in all

versions of the Heil Classic microphone.

HC-4: The “DX Dream Machine” is a dynamic element

engineered for contest and DX operators. It has a specified

500 to 3800 Hz response with a 10 dB rise at 2000 Hz.

HC-5: The “Key Element” is a dynamic cartridge designed

for general SSB communication. It has a specified frequency

response of 350 to 4000 Hz with a 6 dB rise at 2000 Hz.

Heil IC: This is a “high perfor-

mance electret element” specifically

designed to provide the higher audio

levels required for older ICOM radios.

It’s specified at 35 to 10,000 Hz at –3 dB.

The Heil Classic microphone comes

in three different versions as follows:

Classic 5—Includes the PRO LINE

broadcast element and the HC-5. This is

the version we obtained for this review.

Classic 4—Includes the PRO LINE

broadcast element and the HC-4 element.

Classic IC—Includes the PRO LINE

broadcast element and IC element. As

mentioned previously, this is for older

ICOMs only.

The Heil Heritage

The Heil Heritage microphone is

styled after the Shure 55. Right from

the box, its sparkling heavy chrome

finish was an attention grabber

here at Headquarters.

The Heritage is a single element

dynamic microphone. Its frequency

response is specified to be smooth 40

to 18,000 Hz with a standard bal-

Heil Classic and Heritage Microphones

anced output of 600 Ω. The Heritage has a mute

switch, but not a PTT switch. PTT is accom-

plished via an outboard switch connected to

the Heil interface cable. The Heritage also has

/8-27 standard thread assembly that mates

with all of Heil’s microphone stands and

booms.

On the Air

Both the Classic and Heritage mics were

used on the air with a variety of operators,

rigs and modes. In all cases we tried, the Heil

mics received excellent audio reports. These

mics were also the clear favorite in blind

comparisons with the stock mic that came

with my ICOM IC-746 transceiver and other

radios.

Final Thoughts

Although the Classic does have

a PTT switch, I didn’t find it con-

venient for general use or long-

winded transmissions. I’d suggest

an additional hand or foot operated

PTT switch, both of which are avail-

able from Heil. (Obviously, the Heri-

tage requires an outboard PTT switch

since it only has a mute switch.)

There are a few caveats when selecting a mic or its associ-

ated hardware. The Classic, for example, comes with a base;

the Heritage does not. If planning on a Heritage, you’ll prob-

ably want to buy the CB-1 base stand, especially of you don’t

plan on a boom. (The base is surprisingly heavy and features

a rubber non-skid bottom.) It’s also particularly important to

get the correct cable for your radio and microphone. The Clas-

sic is a four-pin XLR connector while the Heritage is only a

three-pin XLR. Classic and Heritage cables are therefore not

interchangeable.

Manufacturer: Heil Sound Ltd, 5800 North Illinois, Fairview

Heights, IL 62208; tel 618-257-3000; www.heilsound.com.

MSRP: Heritage $130; Classic (all versions) $229.

The Heil Classic

microphone.

The Heil

Heritage microphone.

Mike Gruber, W1MG

ARRL Laboratory Engineer

[email protected]

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