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Re: [Amps] Failure of a pair of FU728F

To: <amps@contesting.com>
Subject: Re: [Amps] Failure of a pair of FU728F
From: <dj7ww@t-online.de>
Reply-to: peter.voelpel@t-online.de
Date: Thu, 19 Sep 2019 01:18:01 +0200
List-post: <mailto:amps@contesting.com>
Yes, the pi net design values for 4KW PEP are quite different to 1.5KW.
If designed for 4k, circuit Q will be almost doubled for 1.5k.
And I doubt it can be tuned on 10m with that high tube impedance.

73
Peter


-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Joe Subich,
W4TV
Sent: Mittwoch, 18. September 2019 23:14
To: amps@contesting.com
Subject: Re: [Amps] Failure of a pair of FU728F


"Legal limit" AM is 375 W of carrier -> 1500 W PEP.  Whether the OM4000
can be tuned properly for that operating condition is another story.

73,

    ... Joe, W4TV


On 2019-09-18 2:13 PM, Greg Wasik wrote:
> Guessing that if you wanted to run legal limit AM with the OM4000 you
would
> want to avoid any long pauses in your modulation so that the average power
> is at least 1KW.  A dead key would be deadly...
> 
> Greg
> K1YW
> 
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