[Icom] На: [Icom] IC-775DSP and Heil Pr oset Plus IC

[Vladimir V. Sidorov]

Hi Anders,

Very few answers to your question were seen here, therefore could not resist
to come up.

It's quite unclear what kind of ProSet you are using. The "IC" one (Icom
dedicated) should have an electret mike installed, but you mentionned HC-4
being a dynamic one.

I am using the 775DSP with a ProSet-4 and other mikes. Actually it should
not matter what kind of frame you are using for your Heil Element 4 or 5. I
mean , is it ProSet or ProSet Plus, it should not matter at all. The only
thing which is really important is the way you connect it to the radio.

Actually I used to use 2 Icom radios  (756 and 775) with 2 Heil mikes, both
with HC-4 elements. In the both cases it worked fine provided, an
electrolitic capacitor is put in series with the mike with its "plus"
connected the radio's mike input. That's it. By doing that the dynamic Heil
mike is isolated from the constant current which presents on the Icom's mike
input, but the signal itself goes in the way it should and the mike sounds
the way it should.

As for the SM-20, are you sure, the "Low cut" on the mike's bottom is "On"?
If so, you should have plenty of mids and highs, as I do with mine. To be
honest, the "On-Off" are quite confusing. One should realize that when there
is "Off", it does not mean that the bass is off. Instead, the bass is On,
and when the switch is in the "On" position, the bass is cut off.

Obviously all the above is correct provided, the radio itself is in order...
Most probably it is, as long as the nandmike works OK.

73,
"Walt", EU1SA


> Hi all!
>
> I really don´t know what to do. Now I have big problems.
>
> I were in the U.S. a couple of weeks and got a Heil Proset Plus IC with me
> back. The thing is, that it sounds awfully. Well I am not sure it is the
> headset or the IC-775DSP or the combination of the two (or me???).
>
> I begin with the IC-element. There seem to be a lot of low-mid, more than
a
> lot. Some real bass, but not to much compared to low mid. There is not
much
> high-mid  and absolutly no treble what so ever. The settings are "Tone" 12
o
> clock. DSP: Low 200 and high 2,9 (highest possible). Drive is 12 o klock
and
> micgain is between 11 and 12. COMP is on. The sound is undefined, like
> talking into two empty tins with a string between. Just the low-mid seem
to
> bee there. If I talk just infront of the opening of the mic-element there
> seem to be some high-mid but not that much. If I talk the least beside,
> above or below the element there is only low-mid and it sounds as I have a
> clothes peg attached to my nose.
>
> With the HC-4 element it gets better with some more high-mid but still no
> treble, and the level is to low to make the VOX to work reliable.
>
> I have a SM-20 deskmike. It sounds much better with bas to high mid, but
it
> could use some more treble. Gain is no issue as it has the amp. I use 40
to
> 45% on the mic.
>
> I have a handmike, a ICOM HM-15 I think. It has the standard ICOM electret
> condeser mic element. It sounds the best. Full range bass to treble. Not
as
> much treble as my TS-850 with hi-boost and compressor, but enough to make
> local QSO's commendable.
>
> Now back to the Heil IC element. If I put "Tone" to maximum, talk just
> infront of the element, and switch of PSN on TX I get rid of some of the
> "tin to tin" comunication sound, but then it is only narrow mid-mid. It
> sounds very boring. Not good for DX and not enjoyable for local QSOs.
>
> One could think there is a problem with the Heil IC element, but why is
the
> HC-4 also the same and even the SM-20 has the same tendency? If the radio
is
> broken, why is the hand mike ok?
>
> I am so confused that you have´nt heard of it before!
>
> Please, any help is appreciated!
>
> /Anders
>
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