[TenTec] TT Eagle mic equalization

GARY HUBER glhuber at msn.com
Fri Oct 11 20:54:56 EDT 2013

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 

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

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.
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
> --
> 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
> http://lists.contesting.com/mailman/listinfo/tentec
TenTec mailing list
TenTec at contesting.com

More information about the TenTec mailing list