K3: cw man has microphone question

[DOUGLAS ZWIEBEL]

Okay...all this microphone talk piqued my interest (yes, that is
spelled correctly).

I bought my mic long, long ago.  Back then, as I recall, Heil only
offered one element in a boom.  I have the BM10K (just the boom, not
the headset).  I opened it up today and note that the element is an
HC5.

I see that the specs are:

HC-4 Specifications:
  Type: - Dynamic. Copper wound bobbin, moving coil transducer
  Frequency: 500 Hz to 3,800 Hz with 10 dB rise at 2,000 Hz.
  Sensitivity: -66 dB Nominal
  Impedance: 2,000 ohms @ 1,000 Hz.
  Size: .530 x .850 x .310

HC-5 Specifications:
  Type: - Dynamic. Copper wound bobbin, moving coil transducer
  Frequency: 350 Hz to 4,000 Hz with 6 dB rise at 2,000 Hz.
  Sensitivity: -68 dB Nominal
        Impedance: 2,000 ohms @ 1,000 Hz.
  Size: .530 x .850 x .310

Not much difference, but two questions:

1.  Can you actually hear a difference, and

2.  With the K3, does it matter since there is an 8 band EQ on tx?
Could one tailor the an HC5 to "sound" like (close to) and HC4 or
vice-versa?

Thanks...
de Doug KR2Q
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[Ed Muns, W0YK]

> HC-4 Specifications:
>   Type: - Dynamic. Copper wound bobbin, moving coil transducer
>   Frequency: 500 Hz to 3,800 Hz with 10 dB rise at 2,000 Hz.
>   Sensitivity: -66 dB Nominal
>   Impedance: 2,000 ohms @ 1,000 Hz.
>   Size: .530 x .850 x .310
>
> HC-5 Specifications:
>   Type: - Dynamic. Copper wound bobbin, moving coil transducer
>   Frequency: 350 Hz to 4,000 Hz with 6 dB rise at 2,000 Hz.
>   Sensitivity: -68 dB Nominal
>         Impedance: 2,000 ohms @ 1,000 Hz.
>   Size: .530 x .850 x .310
>
> Not much difference, but two questions:
>
> 1.  Can you actually hear a difference, and

Yes, the difference is striking.  The HC5 is pleasant to listen to while the
HC4 is more intelligible in crowded conditions and pileups.

> 2.  With the K3, does it matter since there is an 8 band EQ on tx?
> Could one tailor the an HC5 to "sound" like (close to) and
> HC4 or vice-versa?

Yes, the K3 TX equalizer is very handy in this regard.  Keep in mind that it
allows you to not only create "other" microphone responses, but more
importantly customize your transmit audio to the combination of your
individual voice and the microphone characteristics.  Look up my prior post
(just after SS Phone) about tweaking the TX equalizer a bit even with the
HC4 element to optimize it for my voice frequencies.

73,
Ed - W0YK

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