[AMRadio] D-104 modifications


Bill VanKirk bvkirk at gmail.com
Thu Aug 26 23:14:05 EDT 2010


This mod works quite well


http://www.qsl.net/hcara/Improving_the_D-104_N9WB_rev2.pdf



On Thu, Aug 26, 2010 at 9:32 PM, Bob Peters <rwpeters at swbell.net> wrote:

> Any D-104 mic with the rivet on nomenclature has good elements in them if
> they still work...I have 1 out of my many d-104's... The final edition
> D-104
> has a total crap element in it...
>
> Bob W1PE
>
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of John
> Sent: Thursday, August 26, 2010 7:33 PM
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] D-104 modifications
>
> Bob said the Astatic engineer made this statement....
>
> "The preamp is to make the terrible new crystal elements sound good"
>
> This warrants a question.  At what point did they start using the "new
> crystal elements"  ?  I have a much older D-104.  In fact, it has a
> very plain stand, no ptt on the base of the handle.  Not sure when it
> was manufactured but I imagine it was well before the 1970s.  It sounds
> great into old speech amp gear that has hi-Z input.
>
> Apparently the question is not that simple due to the variations in
> D-104 crystals.  However, I can certainly assert that the older crystal
> elements do great into a Hi-Z input typical of most older boat anchor
> AM equipment.
>
> John
>
>
> -----Original Message-----
> From: Bob Peters <rwpeters at swbell.net>
> To: 'Discussion of AM Radio in the Amateur Service'
> <amradio at mailman.qth.net>
> Sent: Thu, Aug 26, 2010 6:43 pm
> Subject: Re: [AMRadio] D-104 modifications
>
>
> I am going to disagree on this John... I talked with the engineer at
> Astatic
> years ago when Astatic was a real ham radio company... He said " The
> preamp
> is to make the terrible new crystal elements sound good" He also said
> that
> since the mid 80's you cannot find an element that will really make the
> d-104 sound great. Now to the end of a great sounding preamp better
> then the
> astatic preamp K7DYY up in Seattle has made in my book the best sounding
> D104 pre that I have ever heard ... I have one and I love it.  Just my
> nickels worth...I have been an Astatic dealer since the 80's and not any
> longer. In my business now I use all Shure and Heil...
>
> Very Best 73's
> Bob Peters
> W1PE
>
> ARRL, QCWA, AM FOREVER
>
> Money is only temporary, Radio is forever
> >From The Old Dog
>
>
>
>
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of John
> Sent: Thursday, August 26, 2010 4:51 PM
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] D-104 modifications
>
> What's there to modify?  Just bypass the dumb preamp and use the Hi-Z
> crystal directly into your Hi-Z input speech amp and you have a GREAT
> AM mic!
>
>
> -----Original Message-----
> From: Phil LaMarche <plamarc1 at verizon.net>
> To: 'Discussion of AM Radio in the Amateur Service'
> <amradio at mailman.qth.net>
> Sent: Thu, Aug 26, 2010 2:57 pm
> Subject: [AMRadio] D-104 modifications
>
>
> I've lost the call and email address of the ham who modifies the D-104
> for
> better AM audio.  Can anyone share, please?
>
> Phil
>
> Philip LaMarche
>
> LaMarche Enterprises, Inc
> Phil at LaMarcheEnterprises.com
> www.LaMarcheEnterprises.com <http://www.lamarcheenterprises.com/>
>
> 727-944-3226
> 727-937-8834 Fax
> 727-510-5038 Cell
>
> www.w9dvm.com <http://www.w9dvm.com/>
>
> K3 #1605
>
> CCA 98-00827
> CRA 1701
> W9DVM
>
>
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