Dont think its right Jerry.
Max. power rules are so different all over the places, Yaesu would certainly
costumise for some other countries.
Even at 30 Mc/s power is going down, compared with 1.8 Mc/s.
So probably they won't take any risk.
Do you realy think Radio Amateurs would not try to modify whether they are
japanees or not.
I agree with Carol, those who are only good users should KEEP THEIR HANDS
OFF, but thats from the point of vieuw of a professional.....I used to be
in charge of a after sales service for 25 years. Now retired since 99, did
things change that much since ?
----- Original Message -----
From: "Jerry Flanders" <firstname.lastname@example.org>
To: <email@example.com>; <firstname.lastname@example.org>; "Carol L Maher"
Sent: Wednesday, November 27, 2002 10:21 PM
Subject: Re: [Yaesu] Quadra, power increase
> One other thought - I have a Quadra and wondered why both it and the ICOM
> PW-1 have a 500 watt 6-meter limit. It is apparently political. I was
> poking around the web one day and discovered the Japanese power limits on
> meters is 500 watts. Apparently ICOM and Yaesu rate their products at that
> level to not encourage illegal (at home) QRO operation. If and when I
> actually put up a 6 meter antenna, I will be using a full KW from my
> when I need it.
> Jerry W4UK
> At 16:04 11/27/02 -0500, Dave Richards wrote:
> >Well Put Carol !
> >And your points are noted I will leave well alone
> >11/27/2002 1:00:08 PM, Carol L Maher <email@example.com> wrote:
> > >Dave,
> > >I do not own a Quadra, but I have had a chance to play with a one.
> > >So that makes me think, why on earth if you own a beautiful piece of
> > >equipment
> > >like this would you even consider attempting to push the envelope when
> > >comes
> > >to it's power handling capabilities. On the other hand I have worked
> > >several
> > >1 Kw solid state amplifiers made by ITT Mackay Marine while I was
> > >aboard a merchant going container vessel. If the Quadra is
> > >built in a similar manner as the Mackay amplifier, then they are using
> > > 4- banks with 2- transistors in each bank / circuit going into a 50
> > >Ohm
> > >combiner network for the full 1Kw output. I realize that the Quadra
> > >does
> > >not use power transistors per-say.... however it is using Power MOSFETs
> > >in a push pull design.
> > >
> > >Consider this before you push the limits of your amplifier or any rig
> > >that matter. Do you honestly feel the advise you will receiver on this
> > >forum
> > >or from any other amateur off the street to be better than that from
> > >Yaesu
> > >Engineers who designed that amplifier ???? When ever any piece of
> > >electronic
> > >equipment is designed, there is a certain amount of headroom built into
> > >the
> > >equipment design for reliability, voltage variations, and component
> > >reliability.
> > >Note the statement below from the Yaesu web site: "for years of
> > >operation".
> > >
> > >There is an old saying in electronics and it still holds true
> > >"IF IT WORKS --- DON'T FIX IT "
> > >Regards
> > >Carol L. Maher
> > >W4CLM
> > >Charlotte N.C.
> > >
> > >Innovative Ouadra Push-Pull RF Design for 1 kW of MOSFET Power!
> > >Yaesu's engineers have conquered the challenging task of providing
> > >high power output from 160 through 6 meters!* Yaesu's exclusive
> > >Quadra Push-Pull design utilizes 8 rugged MRF-150 MOS FETs for
> > >years of reliable operation.
> > >
> > >
> > >> Reply-To: <firstname.lastname@example.org>
> > >> From: "Dave Richards" <email@example.com>
> > >> To: <firstname.lastname@example.org>
> > >> Date: Tue, 26 Nov 2002 19:31:46 -0500
> > >> Subject: [Yaesu] Quadra question?
> > >>
> > >> I have heard that one can get 1500 watts out with a quadra how does
> > >> one do
> > >> that and is it safe
> > >> Dave
> > >> W1QB
> > >
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