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Re: Toshiba M57762 Power Module



If you hunt on the Toshiba website they have a "preliminary" datasheet for 
it.  But the specs don't match up with the info on RFParts' website.  Don't 
know if RFParts' info is more current, or what.

At 10:04 2003-11-02, kgshutt wrote:
>Jari,
>
>Yaesu returned my 1.2 Ghz module, less the PA module, circuit board, relay
>and all other components in the PA enclosure.  I am still workin with them
>to return the missing parts.
>
>The new Mitsubishi RA18H1213G module appears attractive as a replacement.
>However, I have been unable to locate a data sheet.  RF parts has it listed
>but doesn't have the data sheets on line.
>
>According to RF Parts, the efficiency of this module is 20% versus 30 to 40%
>for the M57762.  I am concerned about overloading the 736 switching power
>supply.
>
>Do you have any comments or suggestions on a source for the data sheets for
>this part.
>
>73 de Ken - K5GUU
>----- Original Message -----
>From: "Jari Koivurinne" <jari.koivurinne@virpi.net>
>To: "kgshutt" <kgshutt@cox.net>
>Sent: Sunday, October 12, 2003 12:33 AM
>Subject: RE: [amsat-bb] Toshiba M57762 Power Module
>
>
> > > Hello Everyone,
> > >
> > > My 1.2 Ghz module for my FT-736 has apparently gone south.  Yaesu
>amateur
> > > repair service reccomends relpacement of the Toshiba M57762 Power
> > > Module at
> > > an estimated repair cost of $420.  Ouch!  I am considering replacing the
> > > module myself.  Anyone have suggestions on a good source of these
>Toshiba
> > > modules?
> > >
> > > Regards,
> > >
> > > Ken - K5GUU
> > >
> > >
> >
> > Hello Ken!
> >
> > Ask RF PARTS. (www.rfpars.com) They have a MOSFET-replacement of M57762.
> > It is called RA18H1213G. Price is about 78.25. Note that this module needs
> > only
> > 10mW of drive so a little attenuator somewhere is needed. The module is
>more
> > linear than the old M57762. You can get allmost 20W of linear power
>compared
> > to
> > 12W for M57762. (and not so linear!!)
> >
> > -Jari
> >
> >
>
>----
>Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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Scott Townley NX7U
Gilbert, AZ  DM43di
http://members.cox.net/nx7u

----
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