[TenTec] Orion Jupiter mic connections

[Robert & Linda McGraw K4TAX]

The reference to Rane Corp. that Duane makes here is EXCELLENT writing and
information.  We would all do well by reading and following their advice.
Many of our interface problems between the computer and radio would be a
thing of the past.

73
Bob, K4TAX

----- Original Message ----- 
From: "Duane Grotophorst" <n9dg at yahoo.com>
To: <tentec at contesting.com>
Sent: Monday, April 19, 2004 9:33 PM
Subject: Re: [TenTec] Orion Jupiter mic connections


>
> Here's a technote from Rane Corporation that goes into
> some pretty good detail about the interconnecting of
> audio gear, both balanced and unbalaced.
>
> http://www.rane.com/note110.html
>
> The bottom line is that there isn't one single answer
> or approach that is applicable to all situations and
> all types of gear. You really do need to know how your
> gear is configured internally as well as the gear that
> it needs to connect to. Unfortunately most ham gear
> manufacturers provide very little such information, so
> you need to dig into the schematics to figure it out.
>
> The whole audio (mic) problem is further compounded by
> the fact that not every manufacturer of equipment
> agrees what is the best method is. So we end up with
> different pieces of gear that are optimized for
> different wiring practices that aren't always friendly
> with each other.
>
> And yes AES/EBU spec sure does go a long way toward
> eliminating most of these kinds of headaches. It's
> also a natural starting point for those Ethernet based
> radios I would like to see ;).
>
> Duane
> N9DG
>
> --- Robert & Linda McGraw K4TAX <RMcGraw at Blomand.Net>
> wrote:
> > If one is gonna do this then I want an AES/EBU
> > input.  That way I can forget
> > all the other crap and be pure digital.
> >
> > Unbalanced, if done correctly, WORKS.  If it doesn't
> > work, it's not correct!
> > No isolation is required.  I've dealt with
> > unbalanced INs and OUTs and
> > balanced INs and OUTs in a professional environment
> > for more years than most
> > have been hams.
> >
> > Isolation transformers are a true invitation for hum
> > being induced.  What
> > was experienced in this situation is a simple case
> > of "ground loops".
> >
> > 73
> > Bob, K4TAX
>
>
>
>
>
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