Hi Troy,
Two other ideas ... 1st - there was an "add on" filter board to audio input
of the O-II, yours may or may not already that inside the cabinet ...
2nd ... by "heavy RF" do you mean a loud hum, or lots of distortion or just
a very strange "taking off" when you key the rig with any audio ???
At one time I had a similar challenge ... and finally tracked it down to ground
loops in how I was powering multiple devices from a common DC supply.
BTW, I am also using a stock Heil Proset with the normal Heil adapter via
a Top Ten DXD and MicroHam Keyer here.
Hope this helps!
73 de Billy, AA4NU
----- Original Message -----
From: "W6HV Troy" <w6hv@verizon.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, February 19, 2016 1:18:31 PM
Subject: Re: [TenTec] RFI into Orion II
I certainly agree. I did open the connector plug and re-checked all. Also, Bob
Heil suggested I connect the mic ground to the connector’s shell. (He said he
was one of the original engineers that helped design the mic circuit in the
first Orion.) So far, nothing has helped. I made sure of continuity for all
connections.
I’ll keep trying.
73,
Troy, W6HV
-----Original Message-----
From: Ted Bryant
Sent: Friday, February 19, 2016 10:58 AM
To: 'Discussion of Ten-Tec Equipment'
Subject: Re: [TenTec] RFI into Orion II
It might be worth a second look, Troy. Those pins on the solder side of that
8-pin connector are very close and the numbers are not easy to read. it would
be easy to be off by one ... ask me how I know. :))
73, Ted W4NZ
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Troy, W6HV
Sent: Friday, February 19, 2016 11:56 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] RFI into Orion II
Ted,
I goofed on what I told you. (A senior problem!) The shield goes to pin 7. I’ll
redo all and see if I can find a mistake.
Troy
-----Original Message-----
From: Ted Bryant
Sent: Thursday, February 18, 2016 8:14 PM
To: 'Discussion of Ten-Tec Equipment'
Subject: Re: [TenTec] RFI into Orion II
Troy,
Thanks for the information. On page 9 of my Orion II manual (version 4- October
2006), in figure 2-3 it shows pins 7 and 8 as the mic connections.
Pin 7 is mic ground and pin 8 is mic +. Pin 6 is shown as PTT +. Pin 5 is PTT
ground. PTT ground and mic ground should be separate. If your mic shield is
connected to pin 6, that could be the problem.
My ProSet is connected via a Top Ten Devices DX Doubler which is cabled to the
mic connector on the Orion. Its pinout is as noted in the Orion manual.
HTH!
73, Ted W4NZ
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Troy, W6HV
Sent: Thursday, February 18, 2016 10:07 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] RFI into Orion II
Ted,
I homebrewed the adapter. The shield side of the ProSet microphone goes to pin
6 on the Orion and the center conductor ( ProSet tip of connector) goes to the
Orion pin 8. Using the Ten Tec model 709 microphone I get great audio.
How is your ProSet connected?
73,
Troy, W6HV
-----Original Message-----
From: Ted Bryant
Sent: Thursday, February 18, 2016 6:02 PM
To: 'Discussion of Ten-Tec Equipment'
Subject: Re: [TenTec] RFI into Orion II
Hi Troy,
Need a bit more information. The Orion II has an 8-pin mic connector and the
Pro Set mic terminates in an 1/8-inch mono plug. I don't understand how it
is connected to the radio. Are you using some sort of an adapter, a Heil
AD-1 maybe?
Are you sure the mic connection is the path of RF ingress and not the
headphone connection? Have you tried a different mic? Have you checked
the bonding of the Orion's chassis to all the other equipment?
I'm using a Heil ProSet with my Orion II without any rfi.
73, Ted W4NZ
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Troy, W6HV
Sent: Thursday, February 18, 2016 6:00 PM
To: tentec@contesting.com
Subject: [TenTec] RFI into Orion II
I recently got a Heil Pro Set 6 and tried to use it with the Orion II. The mic
cable is a shield conductor with the center conductor to the tip of a plug and
the case is connected to the shield. This causes the mic to have no RF shield
and the result is heavy RF into the Orion mic input. Does anyone have a
solution? I have tried a FT-240-J toroid, decoupling with a 1:1 600 ohm
transfomer and both windings by-passed with .001 caps. The only thing I can
think of is the place shielding con the cable (ugly!). Any help?
73,
Troy, W6HV
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