[Amps] Titan 425: High SWR on 28 MHZ

[owe persson]

Hi,
Have you tried to put in a "real SWR-meter" between the rig and the PA, and what
result do you get. My guess is that you have the problem in the PA, as you have 
the same problem with two different driving radios. And that something has happend
with the resonant-circuit in the beginning of the PA. I don´t know how the 425 is 
constructed, but there is normally a type of pi-filter with 50 ohm in and on the 
outside  of  the filter it should be the impedance of the cathode if it is a grouded grid
construction and the impedance of the grid if it is a grounded cathode construction.
Good luck!

73 de Owe /SM3CWE

----- Original Message ----- 
From: "Marcel Jorba" <ea3in at yahoo.com>
To: <amps at contesting.com>
Sent: Monday, October 13, 2003 10:01 PM
Subject: [Amps] Titan 425: High SWR on 28 MHZ


> Hi!
> 
> I ask for your help again!
> 
>  My Titan 425 is showing very high SWR to my FT-1000mp
> so it doesn't drives it most of the time. This only
> happens on 28 MHZ. Time to time the internal tuner
> tunes it and I put aboutt 1KW out, but nothing most of
> the time.
> 
>  I tried with an FT-990 to discard a misfunction on
> the FT.1000mp and the high SWR is there also on 10 m.
> 
>  Any help?
> 
>  Regards
> 
>  Marcel
> 
> 
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