[1000mp] Re: Mark V Field Power Output IMD Specs
Bob Main
bobmain1 at alltel.net
Fri Aug 6 19:21:06 EDT 2004
Oooooooooooo you said the forbidden word key****.
----- Original Message -----
From: "Blake Meinecke" <n4gi at tampabay.rr.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Friday, August 06, 2004 6:48 PM
Subject: Re: [1000mp] Re: Mark V Field Power Output IMD Specs
> So, in a nut shell, "turning up" a horrible splatterbox only makes it
"only
> a little" worse. But hey, if I fix my keyclix while I'm in there turning
> knobs, does it all even out?
>
> 73,
> Blake N4GI
>
> ----- Original Message -----
> From: "Thomas Giella KN4LF" <kn4lf at tampabay.rr.com>
> To: "a Yaesu E-Group" <yaesu at contesting.com>; "a FT-1000MP eGroup"
> <FT-1000MP at yahoogroups.com>; "a 1000MP QTH e-List"
<1000mp at mailman.qth.net>
> Sent: Friday, August 06, 2004 6:02 PM
> Subject: [1000mp] Re: Mark V Field Power Output IMD Specs
>
>
> 14070 kc 100 watts 3rd order -31.9 5th order -45.1
>
> 14070 kc 150 watts 3rd order -31.8 5th order -44.9
>
> 14070 kc 200 watts 3rd order -31.3 5th order -44.4
>
> 73,
> Thomas F. Giella, KN4LF
> Plant City, FL, USA
> Grid Square EL87WX
> Lat & Long 27 58 31 44N 82 09 51 98W
>
> PODXS 070 PSK31 Club Member #349
>
> KN4LF Solar Space Weather & Geomagnetic Data Archive:
> http://www.kn4lf.com/kn4lf5.htm
>
> ----- Original Message -----
> From: Thomas Giella KN4LF
> To: All about Yaesu 1000mp
> Sent: Friday, August 06, 2004 10:17 AM
> Subject: Re: Mark V Field Power Output Mod
>
>
> Morris et all,
>
> I used an HP8563E spectrum analyzer and some other equipment to measure
> spectral purity at 100 watts, 150 watts and then at 200 watts on the V
> Field.
>
> There was no discernable spectral purity degradation at 150 watts and a
> very minimal amount of degradation at 200 watts and still well within FCC
> requirements.
>
> 73,
> Thomas F. Giella, KN4LF
> Plant City, FL, USA
> Grid Square EL87WX
> Lat & Long 27 58 31 44N 82 09 51 98W
>
> PODXS 070 PSK31 Club Member #349
>
> KN4LF Solar Space Weather & Geomagnetic Data Archive:
> http://www.kn4lf.com/kn4lf5.htm
>
> ----- Original Message -----
> From: morris wideman
> To: All about Yaesu 1000mp
> Sent: Friday, August 06, 2004 7:49 AM
> Subject: Re: [1000mp] Re: Mark V Field Power Output Mod
>
>
> Hello
> Im curious as to how you checked the spectral purity of your modified
> radio?.
> Finals that are operating at 12v not 30 are going to be much more
likely
> to generate spurious emissions if they are overdriven.
> WA4MIT Morris
>
> ----- Original Message -----
> From: "Thomas Giella KN4LF" <kn4lf at tampabay.rr.com>
> Date: Thu, 5 Aug 2004 23:45:07 -0400
> To: "a Yaesu E-Group" <yaesu at contesting.com>,"a FT-1000MP eGroup"
> <FT-1000MP at yahoogroups.com>,"a 1000MP QTH e-List" <1000mp at mailman.qth.net>
> Subject: [1000mp] Re: Mark V Field Power Output Mod
>
> > My original post below has stimulated allot of controversy and
posts.
> I stand by what I already said:
> >
> > .....I've tested the rig extensively at 175 watts on CW and RTTY and
> have suffered no component failures, overheating, etc. and no transmit
> spectral degradation. Of course like all mods. make it at your own
risk.....
> >
> > I look at it this way. In the original spirit of ham radio I'm not
> afraid to open up my modern expensive rice box, to experiment and modify.
In
> my original post I never mentioned operating my V Field at 200 watts but
it
> did hold up very well with no overheating etc. at 175 watts on CW and
RTTY,
> as an experiment. Why did it hold up so well? It's because the rig is
better
> engineered and has better specs. then advertised and a certain amount of
> "appliance operator" headroom is built in.
> >
> > Am I stressing the rig? Maybe so but if it blows up I'll fix it
and/or
> buy another one. One ham posted in response to my original post, to
> paraphrase, "Real Ham's understand how electronics work and don't turn up
> the power on their rig". I say "Real Ham's" are not afraid to experiment.
> >
> > In any event, in my day to day operations I never run my V Field
above
> 125 watts. I originally tweaked up the power output because from the
factory
> my V Field only put out 90 watts on 160 meters and I needed 125 watts to
> drive my old linear to 800 watts.
> >
> > 73,
> > Thomas F. Giella, KN4LF
> > Plant City, FL, USA
> > Grid Square EL87WX
> > Lat & Long 27 58 31 44N 82 09 51 98W
> >
> > PODXS 070 PSK31 Club Member #349
> >
> > KN4LF Solar Space Weather & Geomagnetic Data Archive:
> http://www.kn4lf.com/kn4lf5.htm
> > ----- Original Message -----
> > From: Thomas Giella KN4LF
> > To: a Yaesu E-Group ; a 1000MP QTH e-List ;
> FT-1000MP at yahoogroups.com
> > Sent: Monday, August 02, 2004 6:28 PM
> > Subject: Mark V Field Power Output Mod
> >
> >
> > Justin et all,
> >
> > The Mark V Field power modification is simple but it will attract
> naysayers that will warn of power supply damage/failure, finals failure,
> degraded transmitted spectral purity, etc.
> >
> > Pop the top and bottom covers. Gently turn the rig upside down on
a
> hard surface with the front of the rig facing you. There are three boards
> visible. One is the "Control" board on the left side, the "AF" board on
the
> back right side and the "IF/Filter" board on the front right side. Go to
> VR3003 on the AF board and turn it clockwise. It's marked "RF Power" (I
> think it was). Fully clockwise gives you 190 watts in the CW mode on 14200
> kc, 200 watts on 1845 kc and 180 watts on 28400 kc. Of course connect an
> antenna with low VSWR or a good dummy load.
> >
> > I've tested the rig extensively at 175 watts on CW and RTTY and
have
> suffered no component failures, overheating, etc. and no transmit spectral
> degradation. Of course like all mods. make it at your own risk.
> >
> >
> >
> >
> > ---
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