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AD-1-K doesn't have blocking capacitor, Heil claims

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Dick Dievendorff

AD-1-K doesn't have blocking capacitor, Heil claims

Bob Heil just told me that only the ICOM Heil adapters have blocking
capacitors.

>> Of course NONE of the Kenwood or Yaesu have any blocking caps as none of
their inputs have phantom voltage (thank goodness)

Dick, K6KR

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Don Wilhelm
Sent: Friday, February 24, 2012 11:32 AM
To: Tom
Cc: [hidden email]
Subject: Re: [Elecraft] Heil Proset Headphones

Tom,

Since you have the Icom adapter now, I must ask - Is that a Proset-Ic?
You can find the "Ic" designation in the end of the microphone tube that
attaches to the earphone.
If it is an "Ic" type, it has an electret microphone element which requires
bias.
I believe the Kenwood adapter has a blocking capacitor that will prevent the
bias voltage from reaching the mic element.
If you are using this with a K3, just plug it into the rear panel jack, no
need for an adapter. If you are using it with the K2, rewire the Microphone
Configuration Header to match your Icom adapter.

73,
Don W3FPR

On 2/24/2012 1:58 PM, Tom wrote:

> I have the headset with the adapter for my Icom 756Pro. Which Heil
> adapter do I need to use the headset with the K3? AD-1-K?
>
> Tom
> KQ5S
> ______________________________________________________________
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Buck - k4ia

Re: AD-1-K doesn't have blocking capacitor, Heil claims

Yes but. . .

The Mic pinout used by Elecraft is the Kenwood pinout. So, you would
use a Kenwood adapter with a Heil product. Hence the issue with the
blocking cap - unless Heil has now made available a mic adapter cable
specifically for the Elecraft line.

Buck
k4ia

On 2/24/2012 2:53 PM, Dick Dievendorff wrote:

> Bob Heil just told me that only the ICOM Heil adapters have blocking
> capacitors.
>
>>> Of course NONE of the Kenwood or Yaesu have any blocking caps as none of
> their inputs have phantom voltage (thank goodness)
>
> Dick, K6KR
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Don Wilhelm
> Sent: Friday, February 24, 2012 11:32 AM
> To: Tom
> Cc: [hidden email]
> Subject: Re: [Elecraft] Heil Proset Headphones
>
> Tom,
>
> Since you have the Icom adapter now, I must ask - Is that a Proset-Ic?
> You can find the "Ic" designation in the end of the microphone tube that
> attaches to the earphone.
> If it is an "Ic" type, it has an electret microphone element which requires
> bias.
> I believe the Kenwood adapter has a blocking capacitor that will prevent the
> bias voltage from reaching the mic element.
> If you are using this with a K3, just plug it into the rear panel jack, no
> need for an adapter. If you are using it with the K2, rewire the Microphone
> Configuration Header to match your Icom adapter.
>
> 73,
> Don W3FPR
>
> On 2/24/2012 1:58 PM, Tom wrote:
>> I have the headset with the adapter for my Icom 756Pro. Which Heil
>> adapter do I need to use the headset with the K3? AD-1-K?
>>
>> Tom
>> KQ5S
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
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Don Wilhelm-4

Re: AD-1-K doesn't have blocking capacitor, Heil claims

Buck,

The mic pinout used by Elecraft is *not* the Kenwood pinout. Kenwood
puts +8 volts on pin 5 while Elecraft puts it on pin 6.
BUT the Heil Kenwood adapter does not connect anything to either pin 5
or pin 6, so it works just fine.

73,
Don W3FPR

On 2/24/2012 5:39 PM, Buck - k4ia wrote:

> Yes but. . .
>
> The Mic pinout used by Elecraft is the Kenwood pinout. So, you would
> use a Kenwood adapter with a Heil product. Hence the issue with the
> blocking cap - unless Heil has now made available a mic adapter cable
> specifically for the Elecraft line.
>
> Buck
> k4ia
>
>
> On 2/24/2012 2:53 PM, Dick Dievendorff wrote:
>> Bob Heil just told me that only the ICOM Heil adapters have blocking
>> capacitors.
>>
>>>> Of course NONE of the Kenwood or Yaesu have any blocking caps as none of
>> their inputs have phantom voltage (thank goodness)
>>
>> Dick, K6KR
>>
>> -----Original Message-----
>> From: [hidden email]
>> [mailto:[hidden email]] On Behalf Of Don Wilhelm
>> Sent: Friday, February 24, 2012 11:32 AM
>> To: Tom
>> Cc: [hidden email]
>> Subject: Re: [Elecraft] Heil Proset Headphones
>>
>> Tom,
>>
>> Since you have the Icom adapter now, I must ask - Is that a Proset-Ic?
>> You can find the "Ic" designation in the end of the microphone tube that
>> attaches to the earphone.
>> If it is an "Ic" type, it has an electret microphone element which requires
>> bias.
>> I believe the Kenwood adapter has a blocking capacitor that will prevent the
>> bias voltage from reaching the mic element.
>> If you are using this with a K3, just plug it into the rear panel jack, no
>> need for an adapter. If you are using it with the K2, rewire the Microphone
>> Configuration Header to match your Icom adapter.
>>
>> 73,
>> Don W3FPR
>>
>> On 2/24/2012 1:58 PM, Tom wrote:
>>> I have the headset with the adapter for my Icom 756Pro. Which Heil
>>> adapter do I need to use the headset with the K3? AD-1-K?
>>>
>>> Tom
>>> KQ5S
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this email
>>> list: http://www.qsl.net/donate.html
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Don Wilhelm-4

Re: AD-1-K doesn't have blocking capacitor, Heil claims

In reply to this post by Dick Dievendorff

Dick,

I don't want to argue with the person who should know his own products,
but there *is* (or was) a Proset-iC that had an electret element which
needed bias.
So if the ICOM adapters have the capacitor, how does the ProSet-iC work
with an Icom transceiver.
Are you certain he was referring to the adapter for the ProSet?

73,
Don W3FPR

On 2/24/2012 2:53 PM, Dick Dievendorff wrote:
> Bob Heil just told me that only the ICOM Heil adapters have blocking
> capacitors.
>
>>> Of course NONE of the Kenwood or Yaesu have any blocking caps as none of
> their inputs have phantom voltage (thank goodness)
>
> Dick, K6KR
>
>
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Dick Dievendorff

Re: AD-1-K doesn't have blocking capacitor, Heil claims

http://heilsound.com/amateur/products/headphone-adapters/index.php

Some Heil ICOM adapters have DC blocking capacitors. These are adapters like
the AD-1-I. I've used these when I had ICOM equipment, and I have a few
lying around here.

Some Heil ICOM adapters are designed for microphones that require bias,
including Heil's "iC" series. These are adapters like the AD-1-iC. These
don't have a blocking capacitor.

Heil says the Kenwood (AD-1-K) and Yaesu (AD-1-Y) adapters never contained
DC blocking capacitors. Therefore if you use the AD-1-K for an Elecraft rig,
you choose bias or no bias depending on the K3's microphone configuration
setting.

I didn't intend to make any claims about ICOM-specific adapters or
microphones in the note - I only wanted to determine if any AD-1-Ks had
blocking capacitors. Bob said they didn't.

This means (to me) that I should be able to use Heil's AD-1-K for my
Elecraft K3 for any microphone that has a 3.5 mm plug, whether or not that
microphone requires bias, and the K3's configuration menu sets it up
appropriately. If I had learned that some AD-1-K microphones had blocking
capacitors (and I've seen that stated), then I'd be more careful about
recommending the AD-1-K.

Dick, K6KR

-----Original Message-----
From: Don Wilhelm [mailto:[hidden email]]
Sent: Friday, February 24, 2012 2:57 PM
To: Dick Dievendorff
Cc: [hidden email]
Subject: Re: [Elecraft] AD-1-K doesn't have blocking capacitor, Heil claims

Dick,

I don't want to argue with the person who should know his own products, but
there *is* (or was) a Proset-iC that had an electret element which needed
bias.
So if the ICOM adapters have the capacitor, how does the ProSet-iC work with
an Icom transceiver.
Are you certain he was referring to the adapter for the ProSet?

73,
Don W3FPR

On 2/24/2012 2:53 PM, Dick Dievendorff wrote:

> Bob Heil just told me that only the ICOM Heil adapters have blocking
> capacitors.
>
>>> Of course NONE of the Kenwood or Yaesu have any blocking caps as
>>> none of
> their inputs have phantom voltage (thank goodness)
>
> Dick, K6KR
>
>

Eric Swartz - WA6HHQ

Re: AD-1-K doesn't have blocking capacitor, Heil claims

Administrator

In reply to this post by Buck - k4ia

If Mic Bias = OFF in the K3 mic menu, a blocking cap is not required for
the Heil dynamic mics.

The AD 1-K is Heil's Headset to K3 adapter. (Also for Kenwoods.) No
blocking cap inside.

73,

Eric
---
www.elecraft.com

On 2/24/2012 2:39 PM, Buck - k4ia wrote:

Don Wilhelm-4

Re: AD-1-K doesn't have blocking capacitor, Heil claims

In reply to this post by Dick Dievendorff

Dick,

Thanks for that added information. BTW, most hams do not realize that
one must be very specific when saying you are using a Heil microphone.
With all the microphone and adapter combinations possible, things get
quite confusing.
Everytime someone sends me a K2 for repair and tells me he is using a
Heil microphone, it results in several email exchanges before I
understand the microphone setup enough to test the SSB adapter as the
owner would use it.

Never mind the situation where someone buys a used K2, sends it to me
for updates and alignment/calibration and wants to use some Heil
microphone with it - I need precise information about the microphone and
the adapter, and often the owner does not know, so I have to ask many
questions to get it straight.

73,
Don W3FPR

On 2/24/2012 7:02 PM, Dick Dievendorff wrote:

> http://heilsound.com/amateur/products/headphone-adapters/index.php
>
> Some Heil ICOM adapters have DC blocking capacitors. These are adapters like
> the AD-1-I. I've used these when I had ICOM equipment, and I have a few
> lying around here.
>
> Some Heil ICOM adapters are designed for microphones that require bias,
> including Heil's "iC" series. These are adapters like the AD-1-iC. These
> don't have a blocking capacitor.
>
> Heil says the Kenwood (AD-1-K) and Yaesu (AD-1-Y) adapters never contained
> DC blocking capacitors. Therefore if you use the AD-1-K for an Elecraft rig,
> you choose bias or no bias depending on the K3's microphone configuration
> setting.
>
> I didn't intend to make any claims about ICOM-specific adapters or
> microphones in the note - I only wanted to determine if any AD-1-Ks had
> blocking capacitors. Bob said they didn't.
>
> This means (to me) that I should be able to use Heil's AD-1-K for my
> Elecraft K3 for any microphone that has a 3.5 mm plug, whether or not that
> microphone requires bias, and the K3's configuration menu sets it up
> appropriately. If I had learned that some AD-1-K microphones had blocking
> capacitors (and I've seen that stated), then I'd be more careful about
> recommending the AD-1-K.
>
> Dick, K6KR
>

Eric Swartz - WA6HHQ

Re: AD-1-K doesn't have blocking capacitor, Heil claims

Administrator

In reply to this post by Eric Swartz - WA6HHQ

Also, with the AD1-K adapter, the Heil mics with the iC element -do-
require the K3 Mic Bias = ON.

73,

Eric
---
www.elecraft.com

On 2/24/2012 4:06 PM, Eric Swartz - WA6HHQ, Elecraft wrote:
> If Mic Bias = OFF in the K3 mic menu, a blocking cap is not required for
> the Heil dynamic mics.
>
> The AD 1-K is Heil's Headset to K3 adapter. (Also for Kenwoods.) No
> blocking cap inside.
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Eric Swartz - WA6HHQ

Re: AD-1-K doesn't have blocking capacitor, Heil claims

Administrator

In reply to this post by Dick Dievendorff

We also sell the AD-1-K at Elecraft with our Heil Headsets.

Eric
---
www.elecraft.com

On 2/24/2012 4:02 PM, Dick Dievendorff wrote: