I had a minor RF problem too, and traced it to the headphone input and the
CW key paddles. I wrapped a few turns of headphone cable on a ferrite loop,
and used a small snap-on ferrite on the paddle input and cured the problem
100%. I only noticed the RF on 10 meters, running 1.5 kW with the beam
oriented right over the shack.
Prior to getting the O2 there was also RF getting into the W2IHY box after I
shortened the mic cable from 20' to 8' (quarter wave on 10...I shoulda
thought about that first!), but a ferrite loop fixed that, too.
----- Original Message -----
From: "Ken Waites" <BARBIEKENW@peoplepc.com>
To: "Discussion of Ten-Tec Equipment" <firstname.lastname@example.org>
Sent: Tuesday, February 14, 2006 7:47 AM
Subject: [TenTec] Orion II - Observations and Quirks
> Orion II is playing, right now on CW and digital only as I have not
> changed out the mike connector. (That may prove my downfall!)
> 1. I ordered all crystals plus the aux fan. None of that came with the
> rig. It came strictly vanilla. I had hoped to delay my having
> to use a screwdriver. Guess I will have to open it up if I am going to
> put the crystals.
> Any comments from users of the new crystals? Is 600 hz better than 500
> z - etc.?
> 2. It came with 3.028 software. I think I will wait for a later release
> before I upgrade since AM is not my mode.
> 3. I like the DSP NR better than the Orion. It seems to a better job -
> even on setting of 1. And the higher settings do change things.
> On CW sometimes I hear a bit of a digital artifact on the tone - which I
> really expected. Having used the NIR12 in the past, it seems
> a bit of artifact means you have pushed the envelope of what is possible.
> Otherwise you are "leaving something on the table" that could
> have been done with DSP.
> 4. Description of digital artifact: When NR is turned on, background
> white noise may virtually disappear - depending on RF gain.
> Normally I run RF gain about 60, AF gain in the upper half of scale, and
> attenuation of 6 or 12 db. Usually preamp is off. Then when
> a CW note is heard, it has just a bit of raspyness with it. I take that
> to be a touch of the white noise that DSP NR eliminated. Not
> really objectionable, but noticible.
> 5. I split the aux connection on the back to connect to digital (rig
> expert and MIXW) and also to control Steppir antenna.
> Right now the antenna seems to get false signals now and again - trying to
> jump between 7 Mhz and 18 Mhz. Probably my problem,
> but not solved at this point.
> 6. I seems to have some RF in the shack with the amplifier running. I am
> not sure where it came from. I have new SONY headphones, and
> I hear it in the left ear (where the cord is located) . The sound is not
> present on the internal speaker. I do not have an external speaker
> at this location.
> I have had enough RF at one point that it momentarily knocked receive
> out - then it came back 3 seconds later. Great recovery from
> what might have been a showstopper in the past.
> 7. The fun is back!
> Ken K5WK/7
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