Kim:
I would look at the low-pass filter board for the problem, especially if it
also happens on 17 meters as well as 15, but not on other bands. My first
suspicion would be a cold solder joint on K10 or K11 on the A1 board, or on
any of the associated components: C 21, 23, 48, 78 or L 12 or 16. K10 or
K11 could also have bad contacts.
Since this happens on CW and on both an antenna and dummy load, I would tend
to discount an RFI related problem, although it certainly is a possibility.
Try transmitting with the covers removed and tap the various components with
a non-conducting tool and see if that makes the problem come and go.
Are there any other symptoms, such as more of a problem at 100 Watts than at
a lower power?
Ron N6IE
www.N6IE.com
----- Original Message -----
From: "Kim Elmore" <cw_de_n5op@sbcglobal.net>
To: <tentec@contesting.com>
Sent: Tuesday, April 27, 2010 6:20 PM
Subject: [TenTec] Orion II 15 m CW Transmit Power Fluctuation
>I have noticed a subtle characteristic with my OII on 15 m CW
> transmit: the power output varies in a random fashion key down CW.
> This happens whether I use a dummy load, tuner, or antenna. I noticed
> this with the V2.041XL firmware, and so went to the 2.039d firmware.
> Using V2.041XL on 15 m, with the power output is set to 100 the ALC
> light didn't illuminate, but did using V2.039d. I still, however, see
> the power output fluctuation with either firmware version. Using
> V2.041XL, I see this a bit on 12 m, too. I only see it on 15 m using
> V2.039d.
>
> Has anyone else noticed this?
>
> Kim Elmore N5OP
>
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> TenTec@contesting.com
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>
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