From: Watson 'Atto Parsec' Name
Subject: Re: Boosting output from 120V inverter
References: <0001HW.B9DF7C5F00256614162B2870@news.covad.net> <firstname.lastname@example.org> <0001HW.B9DFECA2002E26AD162B2870@news.covad.net>
X-Newsreader: MicroPlanet Gravity v2.60
Date: Sat, 26 Oct 2002 13:51:20 -0700
NNTP-Posting-Date: Sat, 26 Oct 2002 13:47:43 PDT
Organization: InReach Internet
In article , email@example.com talked
> It is not wise to push these things near and past their design limits....
> while you can fool around and maybe get a very small increase, you will
> DECREASE the life of the components due to heat & stress and when (not if)
> it does fail you will risk damaging any equipment you have hooked to it.
> Spend your money more wisely on a higher wattage inverter...... as you
> indicated they are quite cheap so why screw around with it and risk blowing
> it up and your equipment that is powered by it.
> Best Regards,
> Daniel Sofie
> Electronics Supply & Repair
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
I couldn't have said it better myself. It's foolish to risk damage. And
even if you don't let the somke out, you will probably blow a fuse that is
hidden somewhere inside. But then Dave, here, will probably wrap tinfoil
around it, huh. PFFFT!! :-p
> "DaveC" wrote in message
> > On Fri, 25 Oct 2002 23:03:30 -0700, Bevan Weiss wrote
> > (in message <firstname.lastname@example.org>):
> > > It's not that simple unfortuneately...
> > > The transformer itself probably wont be rated that much above what the
> > > entire inverter is rated at. So just replacing the MOSFET's wouldn't do
> > > trick, you'd have to replace the transformer as well, and the
> transformer is
> > > almost the entire cost of an inverter, apart from design.
> > Futz!
> > Can I gain any increase by properly heatsinking the existing MOSFETs and
> > adding a cooling fan? The 2SK1221 is rated at 250V 10A 80W. My
> > is that it will handle most of this if kept cool, and less when hot.
> > According to the data sheet, power handling capability of this device is
> > at 25oC and derated - pretty much linearly - down to zero W at 100oC. At
> > about 50oC it can handle 50W, which seems like a reasonable temp to keep
> > But in any case, I think that cooling it as much as possible could only
> > --
> > Note that my return address is corrupted in an attempt to reduce spam. If
> > choose to e-mail me, please correct my address as described below.
> > Thanks,
> > Dave
> > ---
> > Dave Carpenter
> > Sound Logic
> > email@example.com
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you put NOSPAM in the
Subject: line. alondra101 hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html