All mentioned tests were done using a 50 ohm dummy load. SWR was 1:1.
Thanks
On Oct 24, 2023, at 11:25 AM, Mike Cumbo <mcumbo@triad.rr.com> wrote:
> Is that to an antenna? What SWR? Have you tried loading a dummy load?
>
> Mike Cumbo, ND4S
>
> Sent from Mail for Windows
>
> From: Ted Schurter via TenTec
> Sent: Monday, October 23, 2023 4:45 PM
> To: TenTec@contesting.com
> Cc: Ted Schurter
> Subject: [TenTec] Issue with Centurion
>
> Hello All,
>
> I have a Centurion amplifier that appears to have a problem delivering the
> specified output power. When tuning up, everything seems to be ok except the
> amplifier can only deliver about 600 watts. The drive power at this time is
> about 25 watts. Further increase of the drive power will result in excessive
> plate current, with only a small increase in output power.
>
> The plate voltage looks fine (3,000 volts no load). Both 3-500z tubes are new
> from RF Parts.
>
> Any thoughts or suggestions would be welcome.
>
> Ted, WB2NVK
> tedschurter@mac.com
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