[Boatanchors] Correction Re: D-104 for DX-100 crystal or dynamic and what impedance?

[D C _Mac_ Macdonald]

I left out the fact that I was referring to the 444 series of Shure mics.


73 de Mac, K2GKK/5 in OKC, OK


________________________________
From: Boatanchors <boatanchors-bounces at mailman.qth.net> on behalf of D C _Mac_ Macdonald <k2gkk at hotmail.com>
Sent: Monday, March 13, 2017 18:53
To: Rob Atkinson
Cc: Boatanchor group; Brian Harris; Glen Zook
Subject: Re: [Boatanchors] D-104 for DX-100 crystal or dynamic and what impedance?

I have always liked the Shure series mic.

73 de Mac, K2GKK/5 in OKC, OK

Sent from my iPad

> On Mar 13, 2017, at 11:38, Rob Atkinson <ranchorobbo at gmail.com> wrote:
>
> You can find D104 heads with xtal elements at hamfests.  The original
> Astatic element is best.  They fail only if the owner is an idiot and
> puts the mic in his garage and leaves it there all summer or leaves it
> in his car out in the sun all day or something like that.  As long as
> they stay indoors with A/C they're fine.  Look for an unamplified base
> but the mic head is all you really need.  It's nice to have a way to
> test them at the fest.  A small solid state audio amp that can run off
> a 9 v. battery with a variety of mic. jacks and a headphone output and
> pair of headphones is great.  You are testing if A.  the element is
> good and B. if it sounds okay, so you don't wind up with a diaphragm a
> CBer poked holes in.
>
> It's worth the trouble.  An original unamplified crystal D104 is
> probably the best mic ever made for any of the old ham tube AM rigs.
>
> Rob
> K5UJ
>
>
>
>> On Mon, Mar 13, 2017 at 10:05 AM, Glen Zook <gzook at yahoo.com> wrote:
>> Unfortunately, the D-104 element is very susceptible to humidity and
>> physical shock and they went bad on a regular basis.  Astatic stopped making
>> replacements years ago.
>>
>>
>> The Kobitone element that worked very well as a replacement, 25LM022, was
>> also discontinued a few years ago.
>>
>>
>> Heil supposedly has kits to modify the D-104.  However, I cannot find it on
>> their website.  It is listed on a couple of dealers websites as
>> HC51RETROKIT.  But, various reviews say that the frequency response is not
>> as good as the original cartridges or the Kobitone element.
>>
>>
>> Glen, K9STH Website: http://k9sth.net
[http://nebula.wsimg.com/59fb09bee8f22073398cc3b2c80bbcec?AccessKeyId=531592D248B589D87A56&disposition=0&alloworigin=1]<http://k9sth.net/>

Home [www.k9sth.net]<http://k9sth.net/>
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>>
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