[Amps] 6kW Coax

[Carl]

----- Original Message ----- 
From: "Mike Tubby" <mike at tubby.org>
To: "David Shapiro" <info at transmittersrus.com>
Cc: "'Carl'" <km1h at jeremy.mv.com>; <amps at contesting.com>
Sent: Sunday, March 11, 2012 5:06 AM
Subject: Re: [Amps] 6kW Coax


> Dave,
>
> Some thoughts:
>
> 1. your design really should be a full Wilkinson combiner, the output of 
> each LPF should have a 100R across to the output of the other LPF so that 
> you have circa 30dB of isolation between the transmitters - consider what 
> happens if of half fails
>
> 2. you "coax 70-75 ohms" needs to be 70.71 ohms of the system is matched 
> to 50R with a decent return loss
>
> 3. at the power levels you're aiming for any loss of very important... 
> recall that 0.1dB loss is 11% and at your power levels that's a lot of 
> heat


HUH? Better check that math.

Carl
KM1H