Heil Headset HC-5

classic Classic list List threaded Threaded
8 messages Options
Reply | Threaded
Open this post in threaded view
|

Heil Headset HC-5

dave.wilburn
I have a Heil headset that I purchased about 4 years ago.  I'm not sure
if it is the "pro" or not.  As memory serves, at the time, the next step
up had a dual element with a switch.  The headset has an HC-5 element.
I have an adapter to this to connect to my recently sold, since
finishing my base K2, Kenwood TS-570D(G).  I have also purchased an MH2
microphone.

The original plan was to sell a different radio, (IC-718) and keep the
TS-570 and thus the headset.  The plan then was to use the MH2 for the
K2.  I will still be using the MH2 primarily for the K2.  But I want to
be able to use the headset on occasion as needed.

I understand the instructions for wiring up the MH2 on the K2.  How will
this impact the use of the headset?

This email suggests it only needs straight across jumpers.
http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/msg00598.html

If that is the case, and I do have the Kenwood adapter already, then if
I just put the straight jumpers in, I should be fine.

If I want to use the MH2, then I need to either put the resistor in the
microphone somehow (not something I am looking to tackle with my large
hands) or make an adapter cable for the MH2 that has the resistor in it.

Am I barking up the correct tree hear, or chasing a feral goose?
--

David Wilburn
[hidden email]
K4DGW
K2 #5982
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Reply | Threaded
Open this post in threaded view
|

Re: Heil Headset HC-5

Don Wilhelm-3
Dave,

Since your plan is to use both the MH2 and the Heil headset with the
HC-5 element, I strongly recommend that you jumper the K2 mic
configuration header for the MH2 - all pins jumpered straight across
(use the little configuration jumpers for computer headers) and solder a
5600 ohm resistor across pins 1 and 6 of the mic jack.

You might also consider connecting the headphone audio to pin 5 of the
mic jack - leave the jumper off the header pin 5 and connect the audio
to the header pin marked "5" with no connection to the pin marked "FUNC"

Then for the Heil headset, build a preamp/adapter in a small external
enclosure - the headset plugs into the adapter.  You will need a preamp
to successfully use the Heil HC5 element.

I have a schematic (it is a bit cluttered, but usable) for a preamp that
was designed just for that application - unfortunately I cannot attach
it to the reflector post, so I will send it to you separately.

73,
Don W3FPR

David Wilburn wrote:

> I have a Heil headset that I purchased about 4 years ago.  I'm not sure
> if it is the "pro" or not.  As memory serves, at the time, the next step
> up had a dual element with a switch.  The headset has an HC-5 element. I
> have an adapter to this to connect to my recently sold, since finishing
> my base K2, Kenwood TS-570D(G).  I have also purchased an MH2 microphone.
>
> The original plan was to sell a different radio, (IC-718) and keep the
> TS-570 and thus the headset.  The plan then was to use the MH2 for the
> K2.  I will still be using the MH2 primarily for the K2.  But I want to
> be able to use the headset on occasion as needed.
>
> I understand the instructions for wiring up the MH2 on the K2.  How will
> this impact the use of the headset?
>
> This email suggests it only needs straight across jumpers.
> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/msg00598.html
>
> If that is the case, and I do have the Kenwood adapter already, then if
> I just put the straight jumpers in, I should be fine.
>
> If I want to use the MH2, then I need to either put the resistor in the
> microphone somehow (not something I am looking to tackle with my large
> hands) or make an adapter cable for the MH2 that has the resistor in it.
>
> Am I barking up the correct tree hear, or chasing a feral goose?
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Reply | Threaded
Open this post in threaded view
|

Re: Heil Headset HC-5

dave.wilburn
Ok, I was trying to stay away from a pre-amp.  What setup does the
Elecraft pro headset have, and how would it have to be wired in relation
to the use of the MH2?

David Wilburn
[hidden email]
K4DGW
K2 #5982


Don Wilhelm wrote:

> Dave,
>
> Since your plan is to use both the MH2 and the Heil headset with the
> HC-5 element, I strongly recommend that you jumper the K2 mic
> configuration header for the MH2 - all pins jumpered straight across
> (use the little configuration jumpers for computer headers) and solder a
> 5600 ohm resistor across pins 1 and 6 of the mic jack.
>
> You might also consider connecting the headphone audio to pin 5 of the
> mic jack - leave the jumper off the header pin 5 and connect the audio
> to the header pin marked "5" with no connection to the pin marked "FUNC"
>
> Then for the Heil headset, build a preamp/adapter in a small external
> enclosure - the headset plugs into the adapter.  You will need a preamp
> to successfully use the Heil HC5 element.
>
> I have a schematic (it is a bit cluttered, but usable) for a preamp that
> was designed just for that application - unfortunately I cannot attach
> it to the reflector post, so I will send it to you separately.
>
> 73,
> Don W3FPR
>
> David Wilburn wrote:
>> I have a Heil headset that I purchased about 4 years ago.  I'm not
>> sure if it is the "pro" or not.  As memory serves, at the time, the
>> next step up had a dual element with a switch.  The headset has an
>> HC-5 element. I have an adapter to this to connect to my recently
>> sold, since finishing my base K2, Kenwood TS-570D(G).  I have also
>> purchased an MH2 microphone.
>>
>> The original plan was to sell a different radio, (IC-718) and keep the
>> TS-570 and thus the headset.  The plan then was to use the MH2 for the
>> K2.  I will still be using the MH2 primarily for the K2.  But I want
>> to be able to use the headset on occasion as needed.
>>
>> I understand the instructions for wiring up the MH2 on the K2.  How
>> will this impact the use of the headset?
>>
>> This email suggests it only needs straight across jumpers.
>> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/msg00598.html
>>
>> If that is the case, and I do have the Kenwood adapter already, then
>> if I just put the straight jumpers in, I should be fine.
>>
>> If I want to use the MH2, then I need to either put the resistor in
>> the microphone somehow (not something I am looking to tackle with my
>> large hands) or make an adapter cable for the MH2 that has the
>> resistor in it.
>>
>> Am I barking up the correct tree hear, or chasing a feral goose?
>
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Reply | Threaded
Open this post in threaded view
|

Re: Heil Headset HC-5

Don Wilhelm-3
Dave,

The ProSet-K2 is a Heil design especially for the Elecraft K2 and plugs
in just like the MH2 or MD2.  It uses an electret mic element which does
not require a preamp because it has a high output level.

An additional note for all:
Heil makes a wide variety of microphones, and it is necessary to be
specific about the different types, they have different output levels
and are not interchangeable.

73,
Don W3FPR

David Wilburn wrote:
> Ok, I was trying to stay away from a pre-amp.  What setup does the
> Elecraft pro headset have, and how would it have to be wired in relation
> to the use of the MH2?
>
> David Wilburn
> [hidden email]
> K4DGW
> K2 #5982
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Reply | Threaded
Open this post in threaded view
|

Re: Heil Headset HC-5

Jack Brindle
In reply to this post by Don Wilhelm-3
Sigh. Don and I have agreed to disagree on this point. I have used my  
K2/100 quite successfully for several years with a Heil Pro headset.  
Mine has the HC-4 element.

I would try it _without_ the preamp  just to see how it works for you  
before deciding you need the extra box. You may end up needing one,  
or things might work just fine.

I would also wire the resistor in the microphone connector for the  
MH2. Small area to play in, but it gets it out of the way. The down  
side is the need to pull power from the K2 out to the connector. I  
have learned that the mic power pin is a prime intrusion point for RFI.

On Apr 6, 2007, at 5:03 AM, Don Wilhelm wrote:

> Dave,
>
> Since your plan is to use both the MH2 and the Heil headset with  
> the HC-5 element, I strongly recommend that you jumper the K2 mic  
> configuration header for the MH2 - all pins jumpered straight  
> across (use the little configuration jumpers for computer headers)  
> and solder a 5600 ohm resistor across pins 1 and 6 of the mic jack.
>
> You might also consider connecting the headphone audio to pin 5 of  
> the mic jack - leave the jumper off the header pin 5 and connect  
> the audio to the header pin marked "5" with no connection to the  
> pin marked "FUNC"
>
> Then for the Heil headset, build a preamp/adapter in a small  
> external enclosure - the headset plugs into the adapter.  You will  
> need a preamp to successfully use the Heil HC5 element.
>
> I have a schematic (it is a bit cluttered, but usable) for a preamp  
> that was designed just for that application - unfortunately I  
> cannot attach it to the reflector post, so I will send it to you  
> separately.
>
> 73,
> Don W3FPR
>
> David Wilburn wrote:
>> I have a Heil headset that I purchased about 4 years ago.  I'm not  
>> sure if it is the "pro" or not.  As memory serves, at the time,  
>> the next step up had a dual element with a switch.  The headset  
>> has an HC-5 element. I have an adapter to this to connect to my  
>> recently sold, since finishing my base K2, Kenwood TS-570D(G).  I  
>> have also purchased an MH2 microphone.
>> The original plan was to sell a different radio, (IC-718) and keep  
>> the TS-570 and thus the headset.  The plan then was to use the MH2  
>> for the K2.  I will still be using the MH2 primarily for the K2.  
>> But I want to be able to use the headset on occasion as needed.
>> I understand the instructions for wiring up the MH2 on the K2.  
>> How will this impact the use of the headset?
>> This email suggests it only needs straight across jumpers.
>> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/ 
>> msg00598.html
>> If that is the case, and I do have the Kenwood adapter already,  
>> then if I just put the straight jumpers in, I should be fine.
>> If I want to use the MH2, then I need to either put the resistor  
>> in the microphone somehow (not something I am looking to tackle  
>> with my large hands) or make an adapter cable for the MH2 that has  
>> the resistor in it.
>> Am I barking up the correct tree hear, or chasing a feral goose?
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

- Jack Brindle, W6FB
------------------------------------------------------------------------
---------------------


_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Reply | Threaded
Open this post in threaded view
|

Re: Heil Headset HC-5

Don Wilhelm-3
Jack,

You are quite correct, I know you and some others have been successful
with increasing the KSB2 R14 resistor value, but that will change the
loading on the MH2/MD2 mics (which can change the audio output
characteristics).  Since Dave wants to use the MH2/MD2 directly on the
K2, in this case I believe the external preamp/adapter is the best
approach.  Using the mic 5 volt line has its limitations, but with a
short cable between the preamp box and the K2 I have not had problems
powering the preamp - just don't load it down or use a long cable (6
inches to 1 foot is enough).

Of course how to implement it is an individual choice, I can only speak
for the implementation that I see is easiest for all the factors in
consideration, but the final choice is up to the individual builder.
There are many workable choices available.

73,
Don W3FPR

Jack Brindle wrote:

> Sigh. Don and I have agreed to disagree on this point. I have used my
> K2/100 quite successfully for several years with a Heil Pro headset.
> Mine has the HC-4 element.
>
> I would try it _without_ the preamp  just to see how it works for you
> before deciding you need the extra box. You may end up needing one, or
> things might work just fine.
>
> I would also wire the resistor in the microphone connector for the MH2.
> Small area to play in, but it gets it out of the way. The down side is
> the need to pull power from the K2 out to the connector. I have learned
> that the mic power pin is a prime intrusion point for RFI.
>
> On Apr 6, 2007, at 5:03 AM, Don Wilhelm wrote:
>
>> Dave,
>>
>> Since your plan is to use both the MH2 and the Heil headset with the
>> HC-5 element, I strongly recommend that you jumper the K2 mic
>> configuration header for the MH2 - all pins jumpered straight across
>> (use the little configuration jumpers for computer headers) and solder
>> a 5600 ohm resistor across pins 1 and 6 of the mic jack.
>>
>> You might also consider connecting the headphone audio to pin 5 of the
>> mic jack - leave the jumper off the header pin 5 and connect the audio
>> to the header pin marked "5" with no connection to the pin marked "FUNC"
>>
>> Then for the Heil headset, build a preamp/adapter in a small external
>> enclosure - the headset plugs into the adapter.  You will need a
>> preamp to successfully use the Heil HC5 element.
>>
>> I have a schematic (it is a bit cluttered, but usable) for a preamp
>> that was designed just for that application - unfortunately I cannot
>> attach it to the reflector post, so I will send it to you separately.
>>
>> 73,
>> Don W3FPR
>>
>> David Wilburn wrote:
>>> I have a Heil headset that I purchased about 4 years ago.  I'm not
>>> sure if it is the "pro" or not.  As memory serves, at the time, the
>>> next step up had a dual element with a switch.  The headset has an
>>> HC-5 element. I have an adapter to this to connect to my recently
>>> sold, since finishing my base K2, Kenwood TS-570D(G).  I have also
>>> purchased an MH2 microphone.
>>> The original plan was to sell a different radio, (IC-718) and keep
>>> the TS-570 and thus the headset.  The plan then was to use the MH2
>>> for the K2.  I will still be using the MH2 primarily for the K2.  But
>>> I want to be able to use the headset on occasion as needed.
>>> I understand the instructions for wiring up the MH2 on the K2.  How
>>> will this impact the use of the headset?
>>> This email suggests it only needs straight across jumpers.
>>> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/msg00598.html 
>>>
>>> If that is the case, and I do have the Kenwood adapter already, then
>>> if I just put the straight jumpers in, I should be fine.
>>> If I want to use the MH2, then I need to either put the resistor in
>>> the microphone somehow (not something I am looking to tackle with my
>>> large hands) or make an adapter cable for the MH2 that has the
>>> resistor in it.
>>> Am I barking up the correct tree hear, or chasing a feral goose?
>> _______________________________________________
>> Elecraft mailing list
>> Post to: [hidden email]
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>> http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>
> - Jack Brindle, W6FB
> ---------------------------------------------------------------------------------------------
>
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Reply | Threaded
Open this post in threaded view
|

Re: Heil Headset HC-5

dave.wilburn
Thanks for all the great input from everyone.  I think I will see if I
can swing the Elecraft/Heil pro-set, install the resistor in the rig,
and just switch between the two as needed.

David Wilburn
[hidden email]
K4DGW
K2 #5982


Don Wilhelm wrote:

> Jack,
>
> You are quite correct, I know you and some others have been successful
> with increasing the KSB2 R14 resistor value, but that will change the
> loading on the MH2/MD2 mics (which can change the audio output
> characteristics).  Since Dave wants to use the MH2/MD2 directly on the
> K2, in this case I believe the external preamp/adapter is the best
> approach.  Using the mic 5 volt line has its limitations, but with a
> short cable between the preamp box and the K2 I have not had problems
> powering the preamp - just don't load it down or use a long cable (6
> inches to 1 foot is enough).
>
> Of course how to implement it is an individual choice, I can only speak
> for the implementation that I see is easiest for all the factors in
> consideration, but the final choice is up to the individual builder.
> There are many workable choices available.
>
> 73,
> Don W3FPR
>
> Jack Brindle wrote:
>> Sigh. Don and I have agreed to disagree on this point. I have used my
>> K2/100 quite successfully for several years with a Heil Pro headset.
>> Mine has the HC-4 element.
>>
>> I would try it _without_ the preamp  just to see how it works for you
>> before deciding you need the extra box. You may end up needing one, or
>> things might work just fine.
>>
>> I would also wire the resistor in the microphone connector for the
>> MH2. Small area to play in, but it gets it out of the way. The down
>> side is the need to pull power from the K2 out to the connector. I
>> have learned that the mic power pin is a prime intrusion point for RFI.
>>
>> On Apr 6, 2007, at 5:03 AM, Don Wilhelm wrote:
>>
>>> Dave,
>>>
>>> Since your plan is to use both the MH2 and the Heil headset with the
>>> HC-5 element, I strongly recommend that you jumper the K2 mic
>>> configuration header for the MH2 - all pins jumpered straight across
>>> (use the little configuration jumpers for computer headers) and
>>> solder a 5600 ohm resistor across pins 1 and 6 of the mic jack.
>>>
>>> You might also consider connecting the headphone audio to pin 5 of
>>> the mic jack - leave the jumper off the header pin 5 and connect the
>>> audio to the header pin marked "5" with no connection to the pin
>>> marked "FUNC"
>>>
>>> Then for the Heil headset, build a preamp/adapter in a small external
>>> enclosure - the headset plugs into the adapter.  You will need a
>>> preamp to successfully use the Heil HC5 element.
>>>
>>> I have a schematic (it is a bit cluttered, but usable) for a preamp
>>> that was designed just for that application - unfortunately I cannot
>>> attach it to the reflector post, so I will send it to you separately.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> David Wilburn wrote:
>>>> I have a Heil headset that I purchased about 4 years ago.  I'm not
>>>> sure if it is the "pro" or not.  As memory serves, at the time, the
>>>> next step up had a dual element with a switch.  The headset has an
>>>> HC-5 element. I have an adapter to this to connect to my recently
>>>> sold, since finishing my base K2, Kenwood TS-570D(G).  I have also
>>>> purchased an MH2 microphone.
>>>> The original plan was to sell a different radio, (IC-718) and keep
>>>> the TS-570 and thus the headset.  The plan then was to use the MH2
>>>> for the K2.  I will still be using the MH2 primarily for the K2.  
>>>> But I want to be able to use the headset on occasion as needed.
>>>> I understand the instructions for wiring up the MH2 on the K2.  How
>>>> will this impact the use of the headset?
>>>> This email suggests it only needs straight across jumpers.
>>>> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/msg00598.html 
>>>>
>>>> If that is the case, and I do have the Kenwood adapter already, then
>>>> if I just put the straight jumpers in, I should be fine.
>>>> If I want to use the MH2, then I need to either put the resistor in
>>>> the microphone somehow (not something I am looking to tackle with my
>>>> large hands) or make an adapter cable for the MH2 that has the
>>>> resistor in it.
>>>> Am I barking up the correct tree hear, or chasing a feral goose?
>>> _______________________________________________
>>> Elecraft mailing list
>>> Post to: [hidden email]
>>> You must be a subscriber to post to the list.
>>> Subscriber Info (Addr. Change, sub, unsub etc.):
>>> http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/subscribers.htm
>>> Elecraft web page: http://www.elecraft.com
>>
>> - Jack Brindle, W6FB
>> ---------------------------------------------------------------------------------------------
>>
>>
>>
>> _______________________________________________
>> Elecraft mailing list
>> Post to: [hidden email]
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>> http://mailman.qth.net/mailman/listinfo/elecraft  Help:
>> http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>>
>
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Reply | Threaded
Open this post in threaded view
|

Re: Heil Headset HC-5

Jack Brindle
In reply to this post by Don Wilhelm-3
OK, just for clarification and to set the record straight, my K2  
(#2905) had NOT had R14 or any other component changed in the SSB  
audio path. I use my Heil headset (HC-4) plugged directly into the  
KRC2, no preamp, no mods. 438 QSOs in last November's phone Sweepstakes.

It seems to work for me...

Note the important part of my original post. Mine is a K2/100, so the  
RF section can make up for any low audio. SSB at 5 watts needs all  
the help it can get, so a preamp is probably a good idea. That's not  
a knock against QRP - as my friend, QRP GURU N6WG will attest, I am a  
fan. I just don't want to be frustrated in a contest with that power  
level, especially when everyone around me is running a gallon or so...

On Apr 6, 2007, at 8:33 AM, Don Wilhelm wrote:

> Jack,
>
> You are quite correct, I know you and some others have been  
> successful with increasing the KSB2 R14 resistor value, but that  
> will change the loading on the MH2/MD2 mics (which can change the  
> audio output characteristics).  Since Dave wants to use the MH2/MD2  
> directly on the K2, in this case I believe the external preamp/
> adapter is the best approach.  Using the mic 5 volt line has its  
> limitations, but with a short cable between the preamp box and the  
> K2 I have not had problems powering the preamp - just don't load it  
> down or use a long cable (6 inches to 1 foot is enough).
>
> Of course how to implement it is an individual choice, I can only  
> speak for the implementation that I see is easiest for all the  
> factors in consideration, but the final choice is up to the  
> individual builder. There are many workable choices available.
>
> 73,
> Don W3FPR
>
> Jack Brindle wrote:
>> Sigh. Don and I have agreed to disagree on this point. I have used  
>> my K2/100 quite successfully for several years with a Heil Pro  
>> headset. Mine has the HC-4 element.
>> I would try it _without_ the preamp  just to see how it works for  
>> you before deciding you need the extra box. You may end up needing  
>> one, or things might work just fine.
>> I would also wire the resistor in the microphone connector for the  
>> MH2. Small area to play in, but it gets it out of the way. The  
>> down side is the need to pull power from the K2 out to the  
>> connector. I have learned that the mic power pin is a prime  
>> intrusion point for RFI.
>> On Apr 6, 2007, at 5:03 AM, Don Wilhelm wrote:
>>> Dave,
>>>
>>> Since your plan is to use both the MH2 and the Heil headset with  
>>> the HC-5 element, I strongly recommend that you jumper the K2 mic  
>>> configuration header for the MH2 - all pins jumpered straight  
>>> across (use the little configuration jumpers for computer  
>>> headers) and solder a 5600 ohm resistor across pins 1 and 6 of  
>>> the mic jack.
>>>
>>> You might also consider connecting the headphone audio to pin 5  
>>> of the mic jack - leave the jumper off the header pin 5 and  
>>> connect the audio to the header pin marked "5" with no connection  
>>> to the pin marked "FUNC"
>>>
>>> Then for the Heil headset, build a preamp/adapter in a small  
>>> external enclosure - the headset plugs into the adapter.  You  
>>> will need a preamp to successfully use the Heil HC5 element.
>>>
>>> I have a schematic (it is a bit cluttered, but usable) for a  
>>> preamp that was designed just for that application -  
>>> unfortunately I cannot attach it to the reflector post, so I will  
>>> send it to you separately.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> David Wilburn wrote:
>>>> I have a Heil headset that I purchased about 4 years ago.  I'm  
>>>> not sure if it is the "pro" or not.  As memory serves, at the  
>>>> time, the next step up had a dual element with a switch.  The  
>>>> headset has an HC-5 element. I have an adapter to this to  
>>>> connect to my recently sold, since finishing my base K2, Kenwood  
>>>> TS-570D(G).  I have also purchased an MH2 microphone.
>>>> The original plan was to sell a different radio, (IC-718) and  
>>>> keep the TS-570 and thus the headset.  The plan then was to use  
>>>> the MH2 for the K2.  I will still be using the MH2 primarily for  
>>>> the K2.  But I want to be able to use the headset on occasion as  
>>>> needed.
>>>> I understand the instructions for wiring up the MH2 on the K2.  
>>>> How will this impact the use of the headset?
>>>> This email suggests it only needs straight across jumpers.
>>>> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/ 
>>>> msg00598.html
>>>> If that is the case, and I do have the Kenwood adapter already,  
>>>> then if I just put the straight jumpers in, I should be fine.
>>>> If I want to use the MH2, then I need to either put the resistor  
>>>> in the microphone somehow (not something I am looking to tackle  
>>>> with my large hands) or make an adapter cable for the MH2 that  
>>>> has the resistor in it.
>>>> Am I barking up the correct tree hear, or chasing a feral goose?
>>> _______________________________________________
>>> Elecraft mailing list
>>> Post to: [hidden email]
>>> You must be a subscriber to post to the list.
>>> Subscriber Info (Addr. Change, sub, unsub etc.):
>>> http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/subscribers.htm
>>> Elecraft web page: http://www.elecraft.com
>> - Jack Brindle, W6FB
>> ---------------------------------------------------------------------
>> ------------------------  
>> _______________________________________________
>> Elecraft mailing list
>> Post to: [hidden email]
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>> http://mailman.qth.net/mailman/listinfo/elecraft  Help: http://
>> mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com

- Jack Brindle, W6FB
------------------------------------------------------------------------
---------------------


_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com