Well I sent the radio back to Tentec, because they said they
had a fix for this type of problem. They applied 4 mods, two
of which seemed relevant to the problem, and the problem went away.
Go figure. But thanks for thinking I don't know what I'm doing.
Tom Wagner - N1MM
-----Original Message-----
From: tentec-bounces@contesting.com
[mailto:tentec-bounces@contesting.com]On Behalf Of Don Steele
Sent: Thursday, December 23, 2004 1:57 PM
To: tentec@contesting.com
Subject: Re: [TenTec] Orion Mic Woes - Sounds like RFI but Wasn't
To the group, I have been using a Heil Pro Set with the Heil mike adaptor(I
can't remember the part number)as my only mike since purchasing the Orion.I
have never experienced this problem in over 2000 QSO's with the radio.I am
no expert,but that leads me to believe the problem does not lie with the
mike,or wiring.
Don
NT0F
----- Original Message -----
From: "Tom Wagner" <tfwagner@snet.net>
To: <tentec@contesting.com>
Sent: Thursday, December 23, 2004 7:10 AM
Subject: RE: [TenTec] Orion Mic Woes - Sounds like RFI but Wasn't
>I failed to point out that this is using a stock Heil
> Proset which has only one wire plus a shield to the mic.
>
> I'm sure with a two-wire + shield situation that grounding
> the shield is the proper approach
>
> 73,
> Tom
>
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of Tom Wagner
> Sent: Thursday, December 23, 2004 8:08 AM
> To: tentec@contesting.com
> Subject: RE: [TenTec] Orion Mic Woes - Sounds like RFI but Wasn't
>
>
> I tried connecting the shield to the mic connector and the
> RFI-like noise was worse than ever. My Orion shows 1/2 ohm
> resistance between the mic connector and the rear ground lug.
>
> 73,
> Tom
>
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of N0KHQ@aol.com
> Sent: Sunday, December 19, 2004 7:42 PM
> To: tfwagner@snet.net; tentec@contesting.com
> Subject: Re: [TenTec] Orion Mic Woes - Sounds like RFI but Wasn't
>
>
> Hi Tom and Group,
>
> If you want to know if you have the later version of the Orion, take a
> multi-meter and set it to OHMS. One lead will go to the Orion mic
> connector,
> the
> other lead will go to the ground wing nut on the back of the Orion. If the
> meter shows a direct SHORT, you have the later version (this is because
> the
> Orion
> mic connector is chassis grounded). If the meter shows an OPEN or any
> resistance at all you have the earlier version. (Orion mic connector not
> chassis
> grounded).
>
> Assuming Orion later version: (Orion mic connector grounded to chassis)
>
> There should be 2 wires coming off of the mic Element. Possibly white and
> (red or black). If you look real, real close at where the wires are
> soldered
> to
> the element you may see a + sign and a - sign. Maybe! If not, I would
> choose
> the white wire as being the Audio hot lead (+ send) and the other wire
> would
> be the Audio ground lead (- return)
>
> If I were you, I would purchase some good quality mic cable. This cable
> will
> have 2 wires (usually white and red) that are surrounded by a shield
> wire.
> Additional wires may be in the cable but they will be by them selves (not
> wrapped within the shield) these wires can be used for PTT or whatever).
> Heil
> sells excellent mic cable, very well shielded.
>
> The shield of the cable connects between the mic housing case and the mic
> connector on the other end of the mic cable. Thats all it does.
>
> One of the wires that is surrounded by the mic cable shield wire will
> become
> the audio hot lead + (send) usually white, the other wire will be the
> audio
> ground lead - (return) usually red.
>
> The Audio + lead (white (send)) will go to Pin #1 on the Orion, the
> Audio -
> lead (red (return)) will go to Pin #2 on the Orion. PTT wire (PTT grounds
> to
> chassis) (1 wire only) will go to Pin #3 on the Orion. Inside your mic
> PTT
> switch you may have to run a wire from there to the mic housing shield.
>
> Or
>
> You can send your Audio in through the rear of the Orion like I do at line
> level and say "to hell with the Orion mic connector". There are 3 ways to
> key
> the Orion, 1 is through the rear of the rig. The other is a 1/4" mono
> phone
> plug inserted into the "CW" on the front of the Orion (requires a Menu
> change)
> and 3rd is to use the mic PTT Pin #3.
>
> You have a whole lot of choices, just choose the right one for you.
>
> Happy Holidays.
>
> John / N0KHQ
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