[TenTec] Heil headphones

[Gary Hoffman]

This is the same device I use.  I like it very much.

I've added some audio isolation transformers that I got somewhere to break
up ground loops.  Also some ferrite cores to prevent RF pickup and feedback.

All in all a nice solution.

((No, I don't use it to try to widen my audio bandwidth))

73 de Gary, AA2IZ


----- Original Message ----- 
From: "Bob McGraw - K4TAX" <RMcGraw at Blomand.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Wednesday, January 16, 2008 10:56 AM
Subject: Re: [TenTec] Heil headphones


> One application that I've used is a small Behringer audio mixer.  It has 2
> mike inputs, 2 line inputs and 2 line outputs and monitor outputs with a
> stereo headphone output that is driven by a separate internal amp and
volume
> control.  Now with that said, this allows one to feed the mike of your
> choice, be dynamic, ceramic, condenser or one that requires 48 volts
phantom
> power {also internal} into the mixer and then from the mixer output to the
> line input of the radio.  This also allows EQ to be added to the specific
> mike channel.  By bringing the monitor and/or headphone signal from the
> radio to one of the line inputs of the mixer you then have control of
> everything.  Lots of flexibility in controlling signals to and from the
> radio.
>
> The mixer is a Behringer EURORACK UB802 and measures 7"W x 8.5"D x 2"H and
> sells new for about $59.95.  Such a deal.  Solves many problems and is an
> "off the shelf" good quality product that with a few mating
> cables/connectors is a true plug and play device.
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message ----- 
> From: "Dennis OConnor" <ad4hk2004 at yahoo.com>
> To: <tentec at contesting.com>
> Sent: Wednesday, January 16, 2008 6:42 AM
> Subject: [TenTec] Heil headphones
>
>
> > So far I have not seen anyone offer a circuit for an audio breakout box
> > which will have an audio amp(s), volume control(s), and jacks for 2 or
> > more headsets with their microphone circuits...  This would be really
> > handy for lots of rigs, and for visitors to the shack to be able to don
a
> > headset and listen or operate also.. Also, very handy for a teaching
> > situation where new ops are being introduced to contesting... I have
idly
> > made a beginning on this circuitry in my head, but being truly lazy I am
> > waiting for someone else to offer a debugged and working circuit for me
to
> > build..
> >
> >
> >
> >
> > denny / k8do
> >
> > ---------------------------------
> > Never miss a thing.   Make Yahoo your homepage.
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>
>
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