microphone jumpers for Heil Pro Headset?

[oe9fwv]

hello all,

my K2 (no tuner, 10W) is fine on SSB now, I use the Kenwood dynamic
microphone (600 Ohm) now and it sounds very good. I have purchased a
Heil Proset together with my K2 kit, and now I'd like to connect it to the K2. I
have a Heil Kenwood adapter from former times when I connect the
headset, there is no modulation from the Headset Microphone. I think it is a
condensor Microphone and needs a phantom voltage for proper function.
Which resistor value between Pin 6 and Pin 1 do you recommend for this
microphone?
Is there a special adapter to connect the Proset to the K2 or can I savely use
the old Kenwood adapter cable?

Another question: when I watch the ALC meter I get the less ALC lights the
higher the band. With 10m there is most of the time no ALC LED at all, or
only 1 section is lighting. Is this normal?
FYI I made the qrpproject SSB modification in my K2 #5203 for better
modulation and higher output.

73! de Werner OE9FWV

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[Ron D'Eau Claire-2]

Werner, OE9FMV asked:
...when I watch the ALC meter I get the less ALC lights the
higher the band. With 10m there is most of the time no ALC LED at all, or
only 1 section is lighting. Is this normal?

-------------------

Yes. As you know, the number of ALC bars represents how much the gain is
being reduced to keep the transmitter peak output power to whatever you have
set with the POWER control knob.

The K2's transmitter stages have less amplification on the higher bands.
That's why you see less maximum power when you transmit, key down, in CW
mode on 10 meters compared to the lower bands. Most K2's have maximum gain
at about 40 meters.

So, as you compare the ALC action transmitting SSB on the various bands,
you'll see that proportionately less ALC is needed on the higher
frequencies. As long as one ALC bar flashes occasionally on 10 meters at
full power, you have all the mic gain you need and are getting full output.

Ron AC7AC

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[Matt Osborn]

Heil Proset with the IC element (look on the boom pivot) requires a
5.6k ohm  resister between pins 1 and 6.  

On Tue, 21 Mar 2006 23:49:39 +0100, "Dr. Werner Furlan"
<[hidden email]> wrote:

>Which resistor value between Pin 6 and Pin 1 do you recommend for this
>microphone?

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[Furlan Werner Dr.]

hi Matt,

Matt Osborn schrieb am 21 Mar 2006 um 18:14:

> Heil Proset with the IC element (look on the boom pivot) requires a
> 5.6k ohm  resister between pins 1 and 6.  

thank you! Yes it is the IC element in my headset.
I have another Heil Headset, with HC-4 inside, will this need another
microphone jumper (without the resistor between 1 and 6) ?

73! de Werner
OE9FWV


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