[TenTec] Orion and TVI

[DaveHeller]

As an RFI engineer and long term (45 years) TVI committee chairman I
pose my first - and most important - question:  "Is the interference on
every single nearby TV receiver?"  If one and only one nearby TV
receiver has no interference the problem is not in the transmitter and
no station modification will be of value.

-----Original Message-----
From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com] On Behalf Of K. Indart
Sent: Thursday, April 28, 2005 10:36 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Orion and TVI

Is your Power Supply a switching type.  These are notorius for creating
noise.  Can you try another power supply, preferably the one you use
with
the Kenwood.   Are your neighbours on a common TV distribution system ?
This is the first time I have heard of an Orion causing TVI !   Go back
again with the Kenwood and see if the TVI has disappeared.  Or it could
be
that something has changed in the TV distribution amplifier, including a
bad
coax connector from the TV antenna to the distributor.  Check the coax
antenna connector to the Orion; maybe the shield is intermittent and
failed
while moving it when you changed equipment.  Let us know how you do.

Ken, WA4RPH   (I have an OMNI VI+ and lKW Centurion, tribander beam and
Zepp
all band ant and no TVI on any band)
-----Original Message-----From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com]On Behalf Of Giuseppe Crosta
Sent: Thursday, April 28, 2005 4:03 AM
To: tentec at contesting.com
Subject: [TenTec] Orion and TVI

Dear friends,

I would like to submit this question to the group.
I have used for several years a Kenwood TS940 transceiver and I never
cause
TVI problems to my neighbour apartments.
Now since I start to use a new TT Orion rtx all my neighbours note
strong
TVI during the operation.
All other equipment are the same: 3 el yagi antenna, power lines,
coaxial
line and so on.
No changes in radio shack. I have added only an external DC power supply
for
the new rig.
Why TVI starts? What are the possible reasons and the corrections? Have
any
other ham the same troubles using the Orion rig?
Thank for your suggestions and help.

Beppe IZ2ABU

------------------------------------------------------------------------
----
--------------------------------------------------------
  AGUSTA  S.p.A.
  An Agusta-Westland Company

  Giuseppe CROSTA
  c/o Politecnico di Milano
  Galleria del Vento - Wind tunnel facility
  Via La Masa, 34
  20158 Milano - Italy

  Phone   +39-02-2399.8057
  Fax       +39-02-2399.8274

  E-mail crosta at aero.polimi.it
------------------------------------------------------------------------
----
--------------------------------------------------------

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Il presente messaggio deve intendersi strettamente confidenziale e
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garantisce
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