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Re: DIY Jecklin Disc Vs NT4

Subject: Re: DIY Jecklin Disc Vs NT4
From: "Rob Danielson" danielson_rob
Date: Mon Jun 5, 2006 12:47 pm (PDT)
At 6:02 PM +0000 6/5/06, tk7859 wrote:
>--- In  "tk7859" <> wrote:
>
>>
>m("btinternet.com/my_photos","//uk.pg.photos.yahoo.com/ph/g0sbw");">http:
>
>>  Some of you might note the album "Jecklin Disc" in the above photos
>>  URL.  This shows photos of a work in progress but not yet reported on.
>
>>I will report on this
>>  project shortly including comparison of the DIY project with my NT4.
>
>Hi All
>
>As mentioned above I have now made test recordings using the jeclin
>disc and the NT4 to record Yesterday's dawm chorus (which seemed to
>have been hijacked by cuckoos).
>
>I used two MZ-NH1s each set to rec. vol. 23 and PCM recording.  The
>mics were set up 8 ft. from the wall of my house looking into the back
>garden.   In line with the mics was a small birdbath fed by a small
>water flow.  This birdbath was 16ft. to the left of the Jecklin and 8
>ft. to the left of the NT4
>
>A two minute MP3, comprising one minute of the Jecklin followed by a
>minute of NT4 (both minutes starting with the closing of a kitchen
>door) shows the Jecklin to be more sensitive than the NT4.  These are
>exactly as taken from the minidisc and are at:
>
>m("btinternet.com/comparison1.mp3","//uk.geocities.com/g0sbw");">http:
>
>
>The same recordings with an attempt to achieve similar sound levels is:
>
>m("btinternet.com/Comparison2.mp3","//uk.geocities.com/g0sbw");">http:
>
>I suppose I prefer the NT4 but the Jecklin has its surprises (note:
>my high frequency hearing is seriously challenged and I cannot hear
>any hiss etc. associated with the capsules used in the Jecklin).
>
>It is to be noted that the NT4 is 350 times more expensive than the
>two capsules used in the Jecklin, and the NT4 is cardioid and the
>capsules omnis.
>
>I am sufficiently intrigued by the performance of the Jecklin to try
>it again in the future with something like a pair of AT3032s, when I
>have enough in the piggybank - what do you think?
>
>I apologise in advance for any problems you may have  with the
>geocities FTP site asking you to "try again later".
>
>Cheers
>
>Tom Robinson
>
>BTW  Any ideas about the cafuffle between the cuckoos and ? that
>occurs at the beginning and end of the excerpts.  The cuckoos seem to
>have moved in on the regular spots used by the blackbirds.
>

Hi Tom--
I couldn't download the volume matched file but after boosting the
DIYCaps/Jecklin section +2.6dB and the NT4 section +13 dB to match
volume, the stereo imaging with your DIY rig is much more interesting
to me and, if you can rid the buzz (~4K Hz and up) from your DIY rig,
I'd head out with it over an NT4 any day. Perhaps some shielding on
the back of the caps or elsewhere would help?

To my ears, the NT-4's stereo image is very compressed towards the
center and the cuckoo call with the NT-4 is harmonically simplified
compared to your DIY Tri-Capsule Jecklin rig.  I assume you removed
the attenuation circuit from your NT-4 cable (if it came with one).

re:
>I am sufficiently intrigued by the performance of the Jecklin to try
>it again in the future with something like a pair of AT3032s, when I
>have enough in the piggybank - what do you think?

You bet. Your findings seem consistent with Curt Olson's results and
he's using the AT-3032's with great results.

Rob D.

--
Rob Danielson
Peck School of the Arts
University of Wisconsin-Milwaukee
http://www.uwm.edu/~type/audio-art-tech-gallery/





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