Silver Eagle microphone

[JEAN-FRANCOIS MENARD-3]

Hi,

A long time friend of mine who have cancer asked me to sell all his  
amateur equipment. I have now an excellent good looking Silver Eagle  
microphone, probably will become a piece of collection, who knows.

I just wondering if anybody try with success to use this microphone  
with their K2 ???

73

=============================================
JEAN-FRANÇOIS MÉNARD / VA2VYZ

ELECRAFT KX1 #999, K2 #4130
FISTS #11896

Pour visitez mon site Internet / To visit my website :

http://homepage.mac.com/jfmenard
=============================================



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[Ron D'Eau Claire-2]

A long time friend of mine who have cancer asked me to sell all his  
amateur equipment. I have now an excellent good looking Silver Eagle  
microphone, probably will become a piece of collection, who knows.

I just wondering if anybody try with success to use this microphone  
with their K2 ???

73

JEAN-FRANÇOIS MÉNARD / VA2VYZ

=============================================

I assume that's an Astatic D-104 "Silver Eagle", Jean-Francois, sometimes
called a "lolly-pop" microphone because of its distinctive shape. If so, it
should have an amplifier built into the base (turn it over and there'll be a
place for a battery and a screwdriver adjustment for the gain). That mic
with the amplifier will drive a K2 beautifully. Avoid over-driving the K2
though. That amplifier has plenty of gain. If you set it up so you get a
little ALC action (shown on the bar graph in ALC mode) on the band that
needs the most audio (usually 10 meters) at full RF power out, it should be
fine. If the adjustment seems touchy because it's near the low end, don't
forget you can switch in an attenuator in the K2 using the Menu. Set SSBA to
1 for about 10 dB audio attenuation.

The D-104 is not a good mic to use with the K2 if it lacks the amplifier.
The D-104 uses a crystal element designed for a load impedance of about
50,000 ohms. That was very common for tube-type audio inputs half a century
ago, but modern gear, like the K2, expects an impedance in the range of
1,000 ohms. That's why Astatic started incorporating the amplifier in the
base of their later microphones.

If you don't have the amplifier and try to use the mic, you will find that
the audio frequency response is very different than what you'd expect due to
the impedance mismatch and the audio level will probably be quite low. In
that case you could try a matching transformer, if the mic has enough output
to drive the K2 without the preamp.

Ron AC7AC

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[N8LP]

I am using one with mine. I assume you are talking about the Silver
Eagle version of the venerable Astatic D-104. Mine has a preamp in the
base, and works just fine with the K2.

Larry N8LP



JEAN-FRANCOIS MENARD wrote:

> Hi,
>
> A long time friend of mine who have cancer asked me to sell all his  
> amateur equipment. I have now an excellent good looking Silver Eagle  
> microphone, probably will become a piece of collection, who knows.
>
> I just wondering if anybody try with success to use this microphone  
> with their K2 ???
>
> 73
>
> =============================================
> JEAN-FRANÇOIS MÉNARD / VA2VYZ
>
> ELECRAFT KX1 #999, K2 #4130
> FISTS #11896
>
> Pour visitez mon site Internet / To visit my website :
>
> http://homepage.mac.com/jfmenard
> =============================================
>
>
>
> _______________________________________________
> 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
>
>
>

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[Tom Skinner-2]

Hello Group,

After seeing several messages about the D-104, I decided mine looked better
in the shack than on the shelf in my study, so I spent some quality time
with it this weekend.

It has the preamp built in the base, and the little schematic glued to the
base is dated 9-75 which is about when I got it.

Wiring it up was no problem and it seems to drive the K2 just fine, but I
have a couple of questions.

1.  There is a switch on the board labeled E and H.  Can't for the life of
me figure out why it is there.  Seems to only switch one side of the push to
talk switch from ground or the other push to talk line.  So what's the E and
H?

2.  Has anyone tried running one of these off the K2 5V line available at
the mic jack instead of the internal 9 V battery?  VOX won't work as is
because the preamp is switched in and out with the push to talk lever.

Thanks in advance,

73,

Tom, KJ3D (Formerly W3QS)


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