Re: Re[2]: Re[2]: Re[2]: Re[2]: Re[2]: Re[2]: 6100

There are a few changes now I look at it..2 pots..B+
and frequency..irfpe40, 3843...

--- peter jones <highwayman2000@mail.ru> wrote:

>
> -----Original Message-----
> From: andre <livnfree_can@yahoo.com>
> To: vectorlist@vectorlist.org
> Date: Sun, 8 Apr 2007 08:50:55 -0700 (PDT)
> Subject: Re: VECTOR: Re[2]: VECTOR: Re[2]: VECTOR:
> Re[2]: VECTOR: Re[2]: VECTOR: Re[2]: VECTOR: 6100
>
> >
> > so this is the part arcadeshop replaced with the
> > irf620 I assume that 'popped' on me on their new
> > board..I guess that was thier upgrade to that..
> >
>
> well the irf is a fet so they had to redesign the
> drive circuits too - they couldnt just drop one in.
>
> the thing about fets, when they run the volt-drop is
> very low so you need much less heatsinking, and they
> can be very fast.
> but - they are also very vulnerable if you stray
> over the specs - i see them explode is switching
> psu's all the time.
> specially in plasma tv's.
>
> the problem with fet's and the bu406 is that any
> fault in a related circuit will take them along for
> the ride.
>
> a strong regular transistor like a bu508 will
> survive.
> even discharging a tubes anode without a resistor
> can kill a fet.
>
>
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Received on Sun Apr 8 13:05:31 2007