RE: [Elecraft] K2 microphone advice

2006-03-03 Thread Darwin, Keith
Thanks guys for the info.

As a pseudo-semi-pro musician, I have some audio processing gear to put
between the mic and the rig.  Mixing board, full parametric EQ,
compressor.  Using the EQ, I can dial in the amount of bandwidth I want
but it is for naught if the rig is filtering it out.  I prefer a wide
open rig (2.8 KHz or so) which allows me to widen the signal for strong
signal rag chews and narrow it for DX, Contests, QRP, etc.

It's funny, really, the gear for the audio path is larger than the rig
itself :-)

73!

- Keith -

-Original Message-
From: Don Wilhelm [mailto:[EMAIL PROTECTED] 
Sent: Thursday, March 02, 2006 6:20 PM
To: Darwin, Keith; elecraft@mailman.qth.net
Subject: RE: [Elecraft] K2 microphone advice

Keith,

The current production K2s have a SSB filter bandwidth of 2.4 kHz - that
can be easily changed to a 2.6 kHz width by changing the capacitor
values (most easily done before the crystals are mounted) - Elecraft has
a kit with the proper value capacitors.  
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RE: [Elecraft] K2 microphone advice

2006-03-02 Thread Ron D'Eau Claire
Don W3FPR wrote:
As an aside, I can recall when the Collins 1.8 kHz SSB mechanical filter was
the thing to be desired by the SSB crowd with adequate bucks to buy the
filter - it gave great communications intelligibility (albiet at the expense
of fidelity) - I just shake my head in wonder about how expectations have
changed over the years.

--

They were greatly prized by what many ops called the "Donald Duck set", as
AM phone operators often called the SSB stations when both modes were quite
popular. (The "Donald Duck" moniker came from what SSB sounded like when not
properly tuned in). 

For A.M rigs, good "communications quality" A.M. had a bandwidth of about 3
kHz (at the -3dB points) and was often wider. The bandwidth was limited only
by the coupling circuits between audio stages with no filters as such, so
the roll off outside the 3 kHz range was very, very gradual compared to a
filter SSB rig. Very few people operate AM these days but many operators
long for the more "natural sounding" audio with a somewhat wider bandwidth. 

Of course, there are those who go to absurd extremes seeking "broadcast
quality" audio that uses excessive bandwidth, but they're not representative
of the bulk of Hams.

Ron AC7AC


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RE: [Elecraft] K2 microphone advice

2006-03-02 Thread Don Wilhelm
Darwin,

The current production K2s have a SSB filter bandwidth of 2.4 kHz - that can
be easily changed to a 2.6 kHz width by changing the capacitor values (most
easily done before the crystals are mounted) - Elecraft has a kit with the
proper value capacitors.  Proper alignment of the filter passband in the
audio spectrum will also go a long way toward obtaining a 'natural sounding'
audio response.  In addition, those K2s that do not have proper dial
calibration may sound a bit 'wimpy' on an SSB roundtable net if one just
tunes it to the designated frequency and does no more fine tuning of the
rest of the folks in the roundtable - the K2 dial may not read correctly
unless it is properly calibrated after setting the 4 MHz reference
oscillator.  If you want details on how to accomplish this task, check out
the K2 Dial Calibration article on my website http://w3fpr.qrpradio.com .

The older KSB2 did have a 2.1 kHz filter width which gave more SSB power
when QRP.  Yes, it did not give great 'broadcast sounding audio', but it is
quite effective.

As an aside, I can recall when the Collins 1.8 kHz SSB mechanical filter was
the thing to be desired by the SSB crowd with adequate bucks to buy the
filter - it gave great communications intelligibility (albiet at the expense
of fidelity) - I just shake my head in wonder about how expectations have
changed over the years.

73,
Don W3FPR

> -Original Message-
>
> I haven't used or worked a K2 on SSB but I get the impression it is not
> the best audio.  Seems to me the issue is not the mic, but the 2.0 KHz
> SSB filter.  That's pretty narrow and won't give good hi-fi (or mid-fi)
> SSB.
>
> How hard would it be to increase the bandwidth of the SSB board's filter
> to 2.6 KHz or so?  I'd love that.  If I want the bandwidth limited I can
> do it with an outboard parametric EQ.
>
> - Keith KD1E -
>

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RE: [Elecraft] K2 microphone advice

2006-03-02 Thread Ron D'Eau Claire
Keith, KD1E asked:
I haven't used or worked a K2 on SSB but I get the impression it is not the
best audio.  Seems to me the issue is not the mic, but the 2.0 KHz SSB
filter.  That's pretty narrow and won't give good hi-fi (or mid-fi) SSB.

How hard would it be to increase the bandwidth of the SSB board's filter to
2.6 KHz or so?  I'd love that.  If I want the bandwidth limited I can do it
with an outboard parametric EQ.

-

Elecraft provides kits of capacitors to change the SSB filter bandwidth,
widening it to 2.2 or 2.6 kHz. Order SSBCAPKT. 

The original SSB filter was made narrow to provide more "talk power" or
"punch" for QRP signals. It's a tradeoff between the narrowest possible
bandwidth, which provides the loudest signal at the other end, and audio
quality. 

I opened up the filter in my K2 to 2.6 KHz and it receives 'standard
broadcast' A.M. signals with the same fidelity as most small AM receivers.
(With the 160 meter option installed, the K2 receives the upper part of the
North American A.M. broadcast band). The wider bandwidth also allows you
more flexibility in setting the passband for test transmit audio (remember,
FL1 is *always* the one used on xmit, no matter which filter you have
selected for receive). With my somewhat gravelly voice I find better to
raise the low frequency cutoff up above 300 Hz and make use of some of the
higher frequency response to balance the audio. 

Ron AC7AC

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RE: [Elecraft] K2 microphone advice

2006-03-02 Thread Darwin, Keith
I haven't used or worked a K2 on SSB but I get the impression it is not
the best audio.  Seems to me the issue is not the mic, but the 2.0 KHz
SSB filter.  That's pretty narrow and won't give good hi-fi (or mid-fi)
SSB.

How hard would it be to increase the bandwidth of the SSB board's filter
to 2.6 KHz or so?  I'd love that.  If I want the bandwidth limited I can
do it with an outboard parametric EQ.

- Keith KD1E -
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Re: [Elecraft] K2 microphone advice

2006-03-02 Thread Don Brown
Hi

The electret elements used in these mikes need to have a small bias voltage 
applied to the mike usually 5-10 volts through a resister usually a few kilo 
ohms. The 701 has the resistor built into the microphone case but the 
Elecraft mikes do not so the resister needs to be added on the back of the 
microphone connector on the front panel board. The resistor connects from 
the +5 volt to the audio out pin and Elecraft recommends 5.6K for their 
mikes. The 701 mike will work fine with or without this resistor as it would 
just be in parallel with the internal resistor and the value is not very 
critical although it does need the +5 volt supply connected for it to work.

Don Brown
KD5NDB




- Original Message - 
From: "John Huffman" <[EMAIL PROTECTED]>
To: ; "Don Brown" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, March 02, 2006 2:51 PM
Subject: Re: [Elecraft] K2 microphone advice


> What's the purpose of the 5.6k resistor?
>
> I use a Ten Tec 701 hand microphone with no resistor with good audio.  I 
> use a
> Ten Tec 706 desk microphone with no resistor but it loses some of it's 
> lows.
> Tried substituting a 9v battery fo0r the bias voltage, but it made no 
> difference
> in the audio.  The MD2 and MH2 tend to overdrive my particular KSB2.
>
> 73 de NA8M
> John
>
>
> > I use a TenTec 701 hand mike. It is a little smaller than the MH2 and 
> > comes
> > with a 4 pin connector so you will need to go to Radio Shack and get an 
> > 8 pin
> > connector and install it in place of the 4 pin. The interface is the 
> > same as
> > the MH2 with the 5.6k resistor for bias required. Works good and is
> > inexpensive ($28)
> >
> > Don Brown
> > KD5NDB
>
> 
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Re: [Elecraft] K2 microphone advice

2006-03-02 Thread John Huffman

What's the purpose of the 5.6k resistor?

I use a Ten Tec 701 hand microphone with no resistor with good audio.  I use a 
Ten Tec 706 desk microphone with no resistor but it loses some of it's lows. 
Tried substituting a 9v battery fo0r the bias voltage, but it made no difference 
in the audio.  The MD2 and MH2 tend to overdrive my particular KSB2.


73 de NA8M
John


I use a TenTec 701 hand mike. It is a little smaller than the MH2 and comes 
with a 4 pin connector so you will need to go to Radio Shack and get an 8 pin 
connector and install it in place of the 4 pin. The interface is the same as 
the MH2 with the 5.6k resistor for bias required. Works good and is 
inexpensive ($28)


Don Brown
KD5NDB


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RE: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]

2006-03-02 Thread Ed Findley
Rich & Don-
I am told that the Heil HM-IC has the same element as the MH-2.  the HM-IC
coupled with the Kenwood cable is plug and play ( with the jumpers and the
5.6k resistor as specified in the Elecraft instructions for the KSB-2). It
works fine in my K2/100

Ed Findley N5LDY
K2 #1073 K2/100 #5278 FP #1233
SKCC #868

-Original Message-



The 701 has the same type of electret capacitor element that many other 
mikes have including the MH2. The plastic case on the 701 is not a large or 
a rugged as the MH2 was but the MH2 is not available any more and Elecraft 
does not have a replacement for it at the current time.

Don Brown

KD5NDB


/28/2006

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Re: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]

2006-03-02 Thread Don Brown
Hi

The 705 desk mike will work if you install the battery in the mike base or 
jumper the +8 volt supply to the mike connector jumper block. It works 
marginally on +5. The only problem is the +8 volt supply is not available on 
the front panel board and you will need to arrange some sort of connector so 
you can unplug the front panel on the K2.

The 701 has the same type of electret capacitor element that many other 
mikes have including the MH2. The plastic case on the 701 is not a large or 
a rugged as the MH2 was but the MH2 is not available any more and Elecraft 
does not have a replacement for it at the current time.

Don Brown

KD5NDB



- Original Message - 
From: "Rich McCabe" <[EMAIL PROTECTED]>
To: 
Sent: Thursday, March 02, 2006 1:23 PM
Subject: Re: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]


> That is something I have yet to try on the K2. I find this tread 
> interesting
> as I have get to get a "great" audio report on my K2.
>
> Right off the bat I bought a MD2 mike in a boom.  I recently bought a new
> Pro III and a Heil PR780 (developed for the Icom-originally) and I can
> hardly make a contact without someone asking about my audio and 
> microphone.
> The reports are outstanding.
>
> I moved the PR780 over to the k2 and was told he audio is much improved 
> over
> the MD2 but its no where near the Pro III.
>
> I assumed this to be typical of the K2 as this is my second one (both late
> serial) and both had similar audio. Not bad by any means, but no one has
> said. You sound great, what are you using !
>
> I have a 705 and might give it a try. If it works I would have to steal 
> the
> element and put it in something else. I just cant stand the plastic feel 
> of
> the TT mike !  Although for me they have worked the best on the multitude 
> of
> TT rigs I have owned.
>
> Rich
>
> kd0zv
> - Original Message - 
> From: "ron" <[EMAIL PROTECTED]>
> To: "Discussion of Ten-Tec Equipment" <[EMAIL PROTECTED]>
> Sent: Thursday, March 02, 2006 1:07 PM
> Subject: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]
>
>
> >I thought this is really cool, that someone would make this
> > recommendation on elecraft reflector.
> > (and you guys complain about TT mikes, Ha!) smile
> >
> > Ron wb1hga
> >
> >  message follows:
> >
> > Hi
> >
> > I use a TenTec 701 hand mike. It is a little smaller than the MH2
> > and comes
> > with a 4 pin connector so you will need to go to Radio Shack and get
> > an 8
> > pin connector and install it in place of the 4 pin. The interface is
> > the
> > same as the MH2 with the 5.6k resistor for bias required. Works good
> > and is
> > inexpensive ($28)
> >
> > Don Brown
> > KD5NDB
>
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RE: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]

2006-03-02 Thread Phil LaMarche
Rich,

I also have the PRO3 and K2/MD2.  Have a Heil PR40 but didn't put it on the
K2.  Have it on the PRO3 and KWM2A.  When you have a K2 solution, let me
know because no matter how well it is adjusted, it sucks on SSB.  I rarely
use the K2 on SSB, but if I take it on vacation, would like it to sound
good.

Phil 


Philip LaMarche
LaMarche Enterprises, Inc.
www.instantgourmetspices.com
727-944-3226
800-395-7795 pin 02
FAX 727-937-8834
NASFT #30210
W9DVM 
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf
Of Rich McCabe
Sent: Thursday, March 02, 2006 2:24 PM
To: elecraft@mailman.qth.net
Subject: Re: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]

That is something I have yet to try on the K2. I find this tread interesting
as I have get to get a "great" audio report on my K2.

Right off the bat I bought a MD2 mike in a boom.  I recently bought a new
Pro III and a Heil PR780 (developed for the Icom-originally) and I can
hardly make a contact without someone asking about my audio and microphone. 
The reports are outstanding.

I moved the PR780 over to the k2 and was told he audio is much improved over
the MD2 but its no where near the Pro III.

I assumed this to be typical of the K2 as this is my second one (both late
serial) and both had similar audio. Not bad by any means, but no one has
said. You sound great, what are you using !

I have a 705 and might give it a try. If it works I would have to steal the
element and put it in something else. I just cant stand the plastic feel of
the TT mike !  Although for me they have worked the best on the multitude of
TT rigs I have owned.

Rich

kd0zv
- Original Message -
From: "ron" <[EMAIL PROTECTED]>
To: "Discussion of Ten-Tec Equipment" <[EMAIL PROTECTED]>
Sent: Thursday, March 02, 2006 1:07 PM
Subject: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]


>I thought this is really cool, that someone would make this
> recommendation on elecraft reflector.
> (and you guys complain about TT mikes, Ha!) smile
>
> Ron wb1hga
>
>  message follows:
>
> Hi
>
> I use a TenTec 701 hand mike. It is a little smaller than the MH2
> and comes
> with a 4 pin connector so you will need to go to Radio Shack and get
> an 8
> pin connector and install it in place of the 4 pin. The interface is
> the
> same as the MH2 with the 5.6k resistor for bias required. Works good
> and is
> inexpensive ($28)
>
> Don Brown
> KD5NDB

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Re: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]

2006-03-02 Thread Rich McCabe
That is something I have yet to try on the K2. I find this tread interesting 
as I have get to get a "great" audio report on my K2.


Right off the bat I bought a MD2 mike in a boom.  I recently bought a new 
Pro III and a Heil PR780 (developed for the Icom-originally) and I can 
hardly make a contact without someone asking about my audio and microphone. 
The reports are outstanding.


I moved the PR780 over to the k2 and was told he audio is much improved over 
the MD2 but its no where near the Pro III.


I assumed this to be typical of the K2 as this is my second one (both late 
serial) and both had similar audio. Not bad by any means, but no one has 
said. You sound great, what are you using !


I have a 705 and might give it a try. If it works I would have to steal the 
element and put it in something else. I just cant stand the plastic feel of 
the TT mike !  Although for me they have worked the best on the multitude of 
TT rigs I have owned.


Rich

kd0zv
- Original Message - 
From: "ron" <[EMAIL PROTECTED]>

To: "Discussion of Ten-Tec Equipment" <[EMAIL PROTECTED]>
Sent: Thursday, March 02, 2006 1:07 PM
Subject: [TenTec] [Fwd: Re: [Elecraft] K2 microphone advice]



I thought this is really cool, that someone would make this
recommendation on elecraft reflector.
(and you guys complain about TT mikes, Ha!) smile

Ron wb1hga

 message follows:

Hi

I use a TenTec 701 hand mike. It is a little smaller than the MH2
and comes
with a 4 pin connector so you will need to go to Radio Shack and get
an 8
pin connector and install it in place of the 4 pin. The interface is
the
same as the MH2 with the 5.6k resistor for bias required. Works good
and is
inexpensive ($28)

Don Brown
KD5NDB


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Re: [Elecraft] K2 microphone advice

2006-03-02 Thread Don Brown
Hi

I use a TenTec 701 hand mike. It is a little smaller than the MH2 and comes 
with a 4 pin connector so you will need to go to Radio Shack and get an 8 
pin connector and install it in place of the 4 pin. The interface is the 
same as the MH2 with the 5.6k resistor for bias required. Works good and is 
inexpensive ($28)

Don Brown
KD5NDB


- Original Message - 
From: "H. Cary III" <[EMAIL PROTECTED]>
To: 
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, March 01, 2006 7:25 PM
Subject: [Elecraft] K2 microphone advice


I need some help/advice.  I have completed K2 #5266 and want to use it on 
SSB, as well as cw.  The MH2 hand mike offered by Elecraft/Heil is no longer 
available and I don't want to use a head mounted mike with earphones which 
is the only other alternative through Elecraft/Heil.

I admit I'm probably spoiled by the "plug 'n play" hand  mikes I've used 
with previous Kenwood/Icom rigs and I'd really like something like that to 
use with my K2.  If the Elecraft/Heil MH2 were still available I wouldn't be 
asking for help but it's not.

 What do others of you use?  Also, does it need to be a mike with any 
special features?

The guys in Elecraft support have been great to work with but I thought I'd 
start here since its after 5pm on the west coast.

73,
Cary, K4TM
K2  #5266 
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Re: [Elecraft] K2 microphone advice

2006-03-02 Thread Rob Locher W7GH

Hi Cary,

Congrats on #5266.  You are asking one of the perennial questions that pop  
up on the reflector.  Doug, VE3MCF, has carefully compiled advice from the  
reflector by topic.  There is good advice on microphones in his archive as  
well as advice on many, many other questions.  (Thanks Doug!)


There are a couple ways to get to his archive from the Elecraft web site.   
One way is to click on "eMail Discussion List" in the left pane, and then  
on "Elecraft email list emails, organized by topic".  Find the K2 area,  
and then the two pages with microphone stuff.


Also if you go to the "Elecraft Forum Daily List archives" page on the  
Elecraft site, you can search through all the reflector posts.


After doing the research myself I got a Kenwood MC-43S, based on favorable  
reports on the reflector.  I don't have the KSB2 finished yet so I can't  
tell you how well it works though.


73,
- Rob W7GH
K2 #5004



On Wed, 01 Mar 2006 17:25:49 -0800, H. Cary III <[EMAIL PROTECTED]>  
wrote:


I need some help/advice.  I have completed K2 #5266 and want to use it  
on SSB, as well as cw.  The MH2 hand mike offered by Elecraft/Heil is no  
longer available and I don't want to use a head mounted mike with  
earphones which is the only other alternative through Elecraft/Heil.
I admit I'm probably spoiled by the "plug 'n play" hand  mikes I've used  
with previous Kenwood/Icom rigs and I'd really like something like that  
to use with my K2.  If the Elecraft/Heil MH2 were still available I  
wouldn't be asking for help but it's not.
What do others of you use?  Also, does it need to be a mike with any  
special features?
The guys in Elecraft support have been great to work with but I thought  
I'd start here since its after 5pm on the west coast.

73,
Cary, K4TM
K2  #5266


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Re: [Elecraft] K2 microphone advice

2006-03-01 Thread Harvey Howell
Hi Phil. There is a new item from MFJ you might want to look at. I think its 
an MFJ-655 microphone equilizer/conditioner that will adapt almost any mic 
with either a round plug or modular to any radio. It has jumpers that can be 
arranged to accomodate any mic and radio configuration. Go to the MFJ web 
site and read about it. It does a lot more with a mic than what I've just 
described too.


Harvey
KN6VP
- Original Message - 
From: "Phil Kane" <[EMAIL PROTECTED]>

To: 
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, March 01, 2006 7:35 PM
Subject: Re: [Elecraft] K2 microphone advice



On Wed, 1 Mar 2006 20:25:49 -0500, H. Cary III wrote:


I admit I'm probably spoiled by the "plug 'n play" hand  mikes I've
used with previous Kenwood/Icom rigs and I'd really like something
like that to use with my K2.  If the Elecraft/Heil MH2 were still
available I wouldn't be asking for help but it's not.



What do others of you use?  Also, does it need to be a mike with any
special features?


 Has anyone adapted a mike with an 8-pin modular plug for use with
 the K2?  My station desk mike is an Adonis (Japanese) that is
 supposed to have an adapter cable for a Kenwood 8-pin round
 connector, but the word that I get from the importer is that Adonis
 is no longer servicing the US market - maybe he can get it, maybe
 not.  If not, my adapter cable for the ICOM 9-pin modular socket is
 what I got.

--
  73 de K2ASP - Phil Kane

  From a Clearing in the Silicon Forest
  Beaverton (Washington County)  Oregon

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Re: [Elecraft] K2 microphone advice

2006-03-01 Thread Phil Kane
On Wed, 1 Mar 2006 20:25:49 -0500, H. Cary III wrote:

>I admit I'm probably spoiled by the "plug 'n play" hand  mikes I've
>used with previous Kenwood/Icom rigs and I'd really like something
>like that to use with my K2.  If the Elecraft/Heil MH2 were still
>available I wouldn't be asking for help but it's not.

> What do others of you use?  Also, does it need to be a mike with any
>special features?

  Has anyone adapted a mike with an 8-pin modular plug for use with
  the K2?  My station desk mike is an Adonis (Japanese) that is
  supposed to have an adapter cable for a Kenwood 8-pin round
  connector, but the word that I get from the importer is that Adonis
  is no longer servicing the US market - maybe he can get it, maybe
  not.  If not, my adapter cable for the ICOM 9-pin modular socket is
  what I got.

--
   73 de K2ASP - Phil Kane

   From a Clearing in the Silicon Forest
   Beaverton (Washington County)  Oregon

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Re: [Elecraft] K2 microphone advice

2006-03-01 Thread K3yt
Hi Cary,
 
I strapped my mike header straight across like for an Elecraft or Kenwood  
mike
using computer jumpers.  No voltage hooked up though (through a  resistor or
otherwise.
 
First I tried an old Lafayette hand mike from an old CB.  It is a 600  ohm 
dynamic mike.
Worked great.  I still had my boom and studio mike that I had used  with my 
FT-990.  
I wired it for Elecraft/Kenwood, and hooked up my footswitch to the key  jack 
(I put a 1/8" stereo siamese adapter on it so I can have my paddle hooked  up 
and the footswitch
at the same time).  It works even better, fuller audio.  This  mike was one I 
bought at radio shack on close out 10 years ago for $5.
 
A friend just built his K2 so I gave him a bunch of jumpers and the  
Lafayette mike.  It
sounds fine, but left me without a hand mike.  So I wired up a Midland  mike 
I had laying around and it works fine too.  I also have one of the $25  Radio 
Shack dynamic hand mikes
but have not tried it yet.  Other guys have used them and they work  fine 
also.
 
All these mikes worked fine and had plenty of output to drive the K2 to  full 
power on SSB.
 
I have been a ham for 29 years and got a lot of stuff, so I had these mikes  
here.  But the 
Radio Shack 21-1172 is only $25 and works fine.
 
Why pay all that money for a name?
 
73 de Bob K3YT
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[Elecraft] K2 microphone advice

2006-03-01 Thread H. Cary III
I need some help/advice.  I have completed K2 #5266 and want to use it on SSB, 
as well as cw.  The MH2 hand mike offered by Elecraft/Heil is no longer 
available and I don't want to use a head mounted mike with earphones which is 
the only other alternative through Elecraft/Heil.
 
I admit I'm probably spoiled by the "plug 'n play" hand  mikes I've used with 
previous Kenwood/Icom rigs and I'd really like something like that to use with 
my K2.  If the Elecraft/Heil MH2 were still available I wouldn't be asking for 
help but it's not. 
 
 What do others of you use?  Also, does it need to be a mike with any special 
features?
 
The guys in Elecraft support have been great to work with but I thought I'd 
start here since its after 5pm on the west coast.
 
73,
Cary, K4TM
K2  #5266
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