All the other bands are acceptible. 10 and 15 are borderline whacked.
-----Original Message-----
From: Steve Ellington <steven4lq@gmail.com>
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Cc: Joe Papworth, K8MP <k8mp@aol.com>
Sent: Thu, Feb 16, 2017 11:51 am
Subject: Re: [TenTec] Centaur input SWR (Update)
I still have the original "standard" 81550 board from my Centurion amp. 3
toroids and 3 caps. Same part number!
The Centurion does have tuned input so it would have better matching etc. I
can easily see how the Centaur would have some SWR.
On Thu, Feb 16, 2017 at 11:38 AM, Joe Papworth via TenTec <
tentec@contesting.com> wrote:
> I took a look at the input filter board and it's not an 81763. It's
> labeled as an 81550 but it is not loaded with the same components as the
> spare 81550 that came from the seller, nor does it match the 81550 in the
> manual.
>
> I thought maybe the 81550 in the amp had modified to be an 81763 but the
> documentation for the 81763 says it should have two coils and 4 caps. The
> one in the amp only has one coil and a resistor in place of the second,
> along with only one cap.
>
> Anyone have a clue what I'm dealing with here?
>
> Thanks, Joe, K8MP
>
>
> -----Original Message-----
> From: Joe Papworth via TenTec <tentec@contesting.com>
> To: tentec <tentec@contesting.com>
> Cc: k8mp <k8mp@aol.com>
> Sent: Thu, Feb 16, 2017 11:02 am
> Subject: [TenTec] Centaur input SWR
>
> I've been ignoring an input SWR problem on my Centaur for a while and
> decided to take a look at it today. 10 and 15 are higher than the others,
> (about 1.8 to 1) The others range from 1.1 to 1.3 to 1. Is that typical? If
> not, the 81763 10/15 meter optional filter board seems to be a likely
> culprit, but there's not much circuitry on it. Thanks, Joe, K8MP
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