Rereading my last post, I don't like the way it sounds. I meant to sound
surprised, not antagonistic! So, I'll try again because I think we have
a point of confusion.
Bruce mentioned in his posting that (1) his Heil adapter caused problems
with his ProSet and Orion, and what he described matched my symptoms
(i.e., not an RF problem). (2) he also talked to Paul Clinton, as I did
yesterday, and followed his advice to remake and adapter, which fixed his
problem. What is unclear in his description is whether he tied the PTT
return to the "cable shield" as he stated, or to the adapter shell (case
ground on the Orion) as Paul indicated to me. Bill notes that the "cable
shield" connection (which goes to Pin 2 on the Orion mic connector) is, I
believe, how the Heil adapter is wired (with both mic shield, single wire
shielded and PTT return wired together on Pin 2).
OK, hopefully that summarizes where we are in unlayering this one. I'm
hoping to nail the solution this weekend - it can't be all that
difficult.
73, Duane
On Fri, 23 Jul 2004 08:32:46 -0500 Duane A Calvin <ac5aa@juno.com>
writes:
> Really? Has Bob Heil changed the wiring of the TT adapter? Have
> you
> opened yours up to see if the PTT ground goes to the shell? Mine
> is
> about 7 years old, and it is definitely *not* wired as required for
> the
> Orion (i.e., PTT return goes to Pin 2 audio ground, not to chassis
> ground
> on the connector shell). If the wiring has changed recently, this
> may be
> is the reason some of us are seeing the problem while some aren't.
>
> 73, Duane
>
>
> On Fri, 23 Jul 2004 07:01:21 -0400 Bill Tippett
> <btippett@alum.mit.edu>
> writes:
> > AC5AA wrote:
> > >I am still working on a solution to my ProSet / Heil adapter /
> > Orion TX
> > audio hum situation - thanks to many of you for very helpful
> hints.
> > One
> > thing I wanted to post for others who may stumble into this same
> > situation is one of the "helpful fixes" NOT to do. Bob Heil's web
>
> > page,
> > which was referenced somewhere along the way, describes tying the
> > microphone shield pin (pin 2 on the Orion) to the mic connector
> > shell.
> > (Here:
> >
>
<http://www.heilsound.com/harmonics.htm#RFI>http://www.heilsound.com/harm
> onics.htm#RFI)
> >
> > Do NOT do this on the
> > Orion! Paul Clinton verified with me yesterday that the Orion
> does
> > not
> > take kindly to making that connection, and I can verify that. I'm
>
> > still
> > working down through the options to determine which one will work,
>
> > and
> > I'll report back when I've found the solution.
> >
> > KM2L wrote:
> > > My woes ended when I made up a cable with a 1/8" jack (Mic In)
> > > connected
> > > to pins 1 and 2 of the TT 4-pin connector, and a 1/4" jack
> (PTT)
> > > connected to pin 3 and to the cable shield.
> >
> > Which is exactly the way the Heil AD-1-T is wired for
> > any who don't want to build the cable themselves.
> >
> > http://www.heilsound.com/ad-1.htm
> >
> > I've been using this with my Heil Pro-Set including
> > Footswitch and PTT since last August with no problems.
> > Maybe someone should tell Heil that his recommendation
> > on the webpage above should exclude Orion (I'm copying
> > Heil Sound on this note).
> >
> > 73, Bill W4ZV
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
> >
>
>
> Duane Calvin, AC5AA
> Austin, Texas
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
Duane Calvin, AC5AA
Austin, Texas
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