[1000mp] Re: Mark V Field Power Output IMD Specs
Tod - ID
tod at k0to.us
Fri Aug 6 19:18:58 EDT 2004
Thanks for providing the measurements Tom.
Tod, K0TO
>-----Original Message-----
>From: 1000mp-bounces at mailman.qth.net
>[mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Thomas
>Giella KN4LF
>Sent: Friday, August 06, 2004 5:02 PM
>To: a Yaesu E-Group; a FT-1000MP eGroup; a 1000MP QTH e-List
>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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