[TenTec] TT Eagle mic equalization

Richards jrichards at k8jhr.com
Fri Oct 11 21:05:42 EDT 2013



While many hams use a desk mounted mic, I am a headset junkie... and use 
various headsets with either open or closed earphone receivers.   A 
headset puts the mic in exactly the same place at all times, regardless 
of whether I turn or move my head, and especially if I move about in my 
big swivel desk chair.  I have a summary of various headsets used with 
my radios here:


[Click the headset commentary button at the bottom.]

------------------- K8JHR ------------------

On 10/11/2013 8:54 PM, GARY HUBER wrote:
> I have used Audacity (audio editing software) for recording audio from
> my microphones and (using Audacity) analyzing them. I first use the
> microphone with a sound card or USB soundcard and play the recordings
> back through my hearing aid's tele-coils via the sound card. Using the
> tele-coil of the hearing aid avoids any distortion from a speaker cone,
> headset diaphragm, or room resonance and I can set both recording and
> play back levels of Audacity and the sound card.
> After I have base line recordings of the microphones using the same
> phrases, at the same amplitude, and rate.  I connect the microphone to
> my OMNI-VII and transmit into a dummy load. I use a FLEX-1500 to receive
> with a Virtual Audio Cable connection (headset output could be coupled)
> to a soundcard and Audacity recording for playback and analysis.  In
> this manner I can hear my own voice as others will hear it over the
> air.  The OMNI-VII has SSB TX BW, TX Roll Off, TX Equalizer, and Speech
> Proc, in the transmit audio chain and the microphone is just beginning
> as is any external audio processing or equalization.
> I have become a proponent of using Audacity and the PowerSDR (on the
> Flex-1500) panadapter to capture the received signals from the OMNI-VII
> and microphone combination and recording it visually, graphically, and
> aurally. I try to log the mic, the settings used,  and date so that the
> Audacity sound files and the associated graphic files are linked.
> I have microphones with Heil HC-4, HC-5, & HC-6 elements, as well a
> carbon and dynamic microphones. I also have a TenTec 705 mic, which
> sounds great for local nets and rag-chew. The HC-4 element is best for
> DXing.
> 73 ES DX,
> Gary -- AB9M
> -----Original Message----- From: Richards
> Sent: Friday, October 11, 2013 2:45 PM
> To: rmcgraw at blomand.net ; Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] TT Eagle mic equalization
> I would follow Bob's procedure, and do it for each microphone you have,
> especially using the mic you use on the other rig that pleases you.
> Also, I like to make recordings with each of my microphones on a
> computer sound recorder application.  I play with each microphone at
> different distances from the mouth, and at different input volumes, to
> get a better idea of how each mic works (in general) and I find that
> sometimes I need to treat different microphones differently - some like
> to close talked - others not as close - and still others...  OK you get
> the drift.  Each microphone seems to have its own sweet spot of
> distance, speaking volume, speaking angle (whether straight on axis or
> slightly off axis), etc.   Each mic will have its own point at which it
> over modulates - even at at regular speaking volume - and gets a tad
> distorted.  Each will have a different range for proximity effect (i.e.,
> it gets more bass as you get closer, and gets more thin and treble as
> you get farther away), and I like to know about each mic before I hook
> it to the radio.
> That is how I learn each microphone's general characteristics, and then
> I try to apply that insight as I use the microphone on the rig - i.e.,
> some like it close, some farther, and all with more or less mic input
> gain.
> In this way, you may get better results with different settings.  Again,
> nothing here contradicts Bob's procedure.   Bob is a true audio
> professional, while I am an advanced hobbyist - having been a field
> tester and review commenter for microphones for the speech recognition
> field.  You learn a lot just playing with several hundred different
> types of microphone over a span of 15 years !
> ALSO - I observe that each radio has a slightly different output sound
> when working with the MON-itor function.   The Omni VII is very clear,
> the Jupiter is just OK, and my Orion II is muddy and quiet - and the
> sound on the front headphone jack differs from the sound on the rear
> speaker jack, and both are different yet from the sound on the LINE-OUT
> jack.  Go figure...  So it may be more clear than you know, because the
> audio chain is different on each rig, and even different on different
> places on the rig.
> Thus it may be better than you think.
> Just MY take.
> ------------------ K8JHR -------------------
> On 10/11/2013 12:21 PM, Robert Mcgraw wrote:
>> I suggest setting the DSP MIC gain to a value between 35 to 45, speech
>> processor OFF and then using the mike and in your normal voice, adjust
>> the hardware mike gain on the side of the radio for normal ALC LED
>> action.  Normal is an occasional flash.  It should not flash on every
>> word.  Set the SP to avalue of about mid way.  This should be about
>> optimum for that mike.  I use the hand mike on my Eagle with excellent
>> reports although it is a bit light on the bottom end.  This works for DX
>> and mobile operation.  To get a better overall sound, a mike such as the
>> 709 is ideal.
>> 73
>> Bob, K4TAX
>>> Well…I got my (new to me) TT Eagle yesterday and am impressed with the
>> little rig…
>>> Receive audio is very good, but I notice that when transmitting with
>> the
>>> hand mic that comes with the rig, its audio is not as clear as with my
>> Omni 7 with 709 mic and 10 db of equalization.
>>> Any internal tweaks in the Eagle to add clarity to my voice?
>>> Anyone using the TT 717 mic equalizer with the Eagle?
>>> I haven't tried my 709 mic with the Eagle yet, but will do so.
>>> _______________________________________________
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>> --
>> Disclosure:
>> I am a Tentec Ambassador and compensated according to the Tentec
>> Ambassador plan. I serve as a volunteer beta test person for the Omni
>> VII, Eagle and Argonaut VI products.   Otherwise, I hold no business or
>> employment interest with Tentec.
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
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