Be careful on the 444's.
Over the years they changed impedance.
I have two of them, one is about 40+ years old, the other about 20, and they
have completely different impedance.
Can't remember which one had low and which one had high impedance.
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Brian
Carling
Sent: Tuesday, February 18, 2014 10:21 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] F.S. New Ten Tec 715 RF Processor
It sounds like you might possibly have had an impedance mismatch. Most
attend tech equipment and other modern equipment uses low impedance
microphones, around 600 ohms.
If you use microphones like the Shure 444 and other high impedance
microphones, they can be loaded down and sound pretty terrible.
Best regards - Bry Carling
> On Feb 18, 2014, at 4:06 PM, Joe W2KJ <w2kj@bellsouth.net> wrote:
>
> Howdy Gang:
>
> Last year I bought a model 715 RF Speech Processor from Ten Tec and
played with it for several months with my Drake gear but couldn't get the
audio to sound good.
>
> A couple of weeks ago I called Ten Tec to let them know that the 715
wasn't working well with my Drake gear so they told me to send the unit back
to them for a look-see.
>
> I received a brand new unit last week and still had the same problem of
poor audio with my Drake gear...using a 444D mike provided excellent audio
with the Drake stuff but not through the 715.
>
> Since the 30 day return policy was no longer in effect I couldn't get a
refund from Ten Tec.
>
> I was told by a Ten Tec rep that a similar complaint was received from an
amateur not getting good audio from his Collins gear with the 715.
>
> I guess the 715 is designed to work with newer gear...I have also heard
that the 715 was designed to work FB with more "restricted audio"
microphones...not sure exactly what that means though.
>
> The 715 gets excellent reviews on eHam Product Reviews..all using newer
equipment not vintage gear.
>
> In any event, I appreciate the support I received from Ten Tec and have
decided to sell the 715 since I can't use it with my Drake gear.
>
> I offer the unit for sale...it is brand new.....will ship for $175.00.
>
> It comes with a cable designed for Ten Tec equipment.
>
>
> Digital picture on request.
>
> Many thanks.
>
> 73, Joe W2KJ
>
>
> _______________________________________________
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