And how can i repair this problem???
--- On Sat, 4/17/10, David Cutter <d.cutter@ntlworld.com> wrote:
From: David Cutter <d.cutter@ntlworld.com>
Subject: Re: [Amps] 160m mosfet linear amplifier problem with ferrite cores
To: "sasas asasas" <tzitzikas_ee@yahoo.com>, amps@contesting.com
Date: Saturday, April 17, 2010, 12:15 PM
You might consider imbalance in each side of the primary which will cause a net
dc to pass, saturation and over-heating. This may be rubbish but it could get
others thinking along a different path.
David
G3UNA
> HI. i have constructed this linear amplifier 500w rms (2kw pep) (50ohm) with
> 12 mosfet irfp360, http://tzitzikas.webs.com/linear500w.jpg for 160m band.
> When i gave 3watts of driving r.f power, it gave to output only 190w at
> 106VDC (6A current). Two radio amateurs who have construct this linear claim
> tha it gives 500w
> r.f power at 110vdc.
> But when i tried to give 4watts of driving r.f power the ferrite Cores (43
> material)
> of transformer T3 broken! Which do you think is the problem??
>
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