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Heil Proset Ic with K2

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Soaring Eagles

Heil Proset Ic with K2

Hi!

I'm getting ready to install my KSB2 in #5757. I'm pretty sure that the
Heil Proset will work with the standard Icom jumpers, but I'm not sure
what, if any, resistor I'll need. Anyone have experience with this
combination that can give me some hints?

Thanks a lot!!!

Jim, WD9HBC
K2 #5757
KX1 #1517

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Don Wilhelm-3

RE: Heil Proset Ic with K2

Jim,

All Heil Prosets are not created equal, you must be specific about the type,
but I will assume your subject line indicating the ProSet-iC is the one you
have purchased. If that is so, and you purchased the Icom adapter from
Heil, then you simply wire your K2 mic configuration header for the Icom
pinout and attach a resistor (5600 ohms is good) from the AF pin to the 5
volt pin on the mic jack - the best location for the resistor is on the back
of the mic jack, not the header just because it is easier mechanically. If
indeed your adapter is Icom, the resistor goes between pins 1 and 2 on the
mic jack.

73,
Don W3FPR

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]On Behalf Of Soaring Eagles
> Sent: Monday, February 05, 2007 12:59 PM
> To: [hidden email]
> Subject: [Elecraft] Heil Proset Ic with K2
>
>
> Hi!
>
> I'm getting ready to install my KSB2 in #5757. I'm pretty sure that the
> Heil Proset will work with the standard Icom jumpers, but I'm not sure
> what, if any, resistor I'll need. Anyone have experience with this
> combination that can give me some hints?
>
> Thanks a lot!!!
>
> Jim, WD9HBC
> K2 #5757
> KX1 #1517
>
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Soaring Eagles

RE: Heil Proset Ic with K2

Don,

You are an absolute fountain of information! Yes, I have the Icom adapter
from Heil and the set works perfectly on my 746.

I suppose another way to approach this is to get the Kenwood adapter from
Heil, making the K2 mic configuration easier and maybe more standard. I'll
have to ponder that for a little bit.

Thanks a lot for your help......hopefully #5757 will be on SSB in a couple
of more days.

72,
Jim, WD9HBC
K2 #5757
KX1 #1517

At 02:12 PM 2/5/2007, Don Wilhelm wrote:

>Jim,
>
>All Heil Prosets are not created equal, you must be specific about the type,
>but I will assume your subject line indicating the ProSet-iC is the one you
>have purchased. If that is so, and you purchased the Icom adapter from
>Heil, then you simply wire your K2 mic configuration header for the Icom
>pinout and attach a resistor (5600 ohms is good) from the AF pin to the 5
>volt pin on the mic jack - the best location for the resistor is on the back
>of the mic jack, not the header just because it is easier mechanically. If
>indeed your adapter is Icom, the resistor goes between pins 1 and 2 on the
>mic jack.
>
>73,
>Don W3FPR

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Soaring Eagles

Heil Proset Ic with K2

In reply to this post by Don Wilhelm-3

One more quick question:

I've got the Heil ProSet-Ic with the Icom (blue) adapter from Heil.
However, I'm not sure if I need to connect the K2 mic connector pin 2 to
the 5V line. In other words, I'm still confused whether this
microphone/headset has the preamp in the mike or not.

Thanks a lot for your help. Otherwise, I think that's the last question I
should have about the KSB2 and the K60XV is ready to put in, but I think
I've got that covered! #5757 is getting nearly fully populated!

At 02:12 PM 2/5/2007, you wrote:

John Lonigro

Re: Heil Proset Ic with K2

I just went to the Heil website and verified the ProSet-Ic has an
electret mic. That means you need to do what Don W3FPR suggested.
(When in doubt, do what Don suggests! You'll seldom go wrong.)

73's,

John AA0VE

Soaring Eagles wrote:

> One more quick question:
>
> I've got the Heil ProSet-Ic with the Icom (blue) adapter from Heil.
> However, I'm not sure if I need to connect the K2 mic connector pin 2
> to the 5V line. In other words, I'm still confused whether this
> microphone/headset has the preamp in the mike or not.
>
> Thanks a lot for your help. Otherwise, I think that's the last
> question I should have about the KSB2 and the K60XV is ready to put
> in, but I think I've got that covered! #5757 is getting nearly fully
> populated!
>
>> ...you simply wire your K2 mic configuration header for the Icom
>> pinout and attach a resistor (5600 ohms is good) from the AF pin to
>> the 5
>> volt pin on the mic jack - the best location for the resistor is on
>> the back
>> of the mic jack, not the header just because it is easier
>> mechanically. If
>> indeed your adapter is Icom, the resistor goes between pins 1 and 2
>> on the
>> mic jack.
>>
>> 73,
>> Don W3FPR

Soaring Eagles

RE: Heil Proset Ic with K2

In reply to this post by Soaring Eagles

Thanks again Don. The resistor and Icom pinout seems to be working fine.

BTW, I have tried to talk with Heil, but my emails have gone unanswered and
thought maybe someone else on the list had already done this. Since that
doesn't seem to be the case, I've now done it successfully and maybe can
help someone else if this question comes up again. This list is
invaluable.......great, accurate technical knowledge at the level desired!

73,

Jim, WD9HBC
K2 #5757
KX1 #1517

At 03:26 PM 2/6/2007, you wrote:

>Jim,
>
>Since you are asking about the internal makings and workings of the Heil
>mic, you may get a better answer from Heil. The real answer has many
>considerations, see below:
>
>What I know of it, the Proset-iC from Heil uses an electret element - and
>that alone says there is a preamp inside (it is a part of every electret
>element). So, yes, the element needs a voltage. In many mics, that
>requires a resistor from the 5 (or 8) volt supply to the AF line of the mic
>element, but there are others that require the 5 volts be applied to a
>separate wire at the mic jack - this is the scheme used in the Ten-Tec
>electret mics.
>
>I do know the Heil Proset-iC works with a resistor from +5 volts to the AF
>pin (mic jack pin 2 to pin 1), but for the specifics, you need to ask the
>mic manufacturer about the construction of the mic that you are using, and
>in the case of Heil mics used with adapters, that information should include
>both the mic wiring and the adapter wiring combined - there are several
>possibilities and valid combinations - only the mic manufacturer has the
>correct answers.
>
>Yes, I realize that most questions of this nature directed to the accessory
>manufacturer yield only 'how to hook it up' info' baed on th estandard
>wiring for a specific transceiver, but that leaves the user with a
>non-conventional application (such as connecting the mic to a soundcard
>interface) with a lot of remaining questions about what mic lines should be
>powered and from what point = such an interface box places just another item
>to be considered in the overall 'correct wiring' scheme. I believe
>definition of what signal is on each wire should be included with every
>microphone or any other piece of equipment.
>
>73,
>Don W3FPR