To keep the 4-1000 plate from shocking you, ground the plate, and float the chassis.
Jim WD5JKO --- Gary Schafer <[EMAIL PROTECTED]> wrote: > How do you reduce the drive for AM? I take it that > is how you operate CW? > > 73 > Gary K4FMX > > > James M. Walker wrote: > > Hum, > > 4-1000A G.G. amplifier, 3000 VDC plate, 700 MA > Plate I, 500 MA > > Grid I, with 125 Watts out of DX-100 running apprx > 2100 W input and > > dissipating 670 watts plate = approximately 1430 > watts output! > > > > While the carrier level into 50 ohm dummy load is > 1400 watts measured > > and a really NICE orange glow! This is with a 200 > cfm blower, air system > > socket and chimney. > > > > Jim > > WB2FCN > > > > ----- Original Message ----- > > From: "Jim candela" <[EMAIL PROTECTED]> > > To: "Discussion of AM Radio" > <[email protected]> > > Sent: Wednesday, January 12, 2005 7:07 PM > > Subject: RE: [AMRadio] AM Amps > > > > > > > >>Darrell, > >> > >>That amp you built with the 4-1000 was a "killer" > in more ways than one! > >>Time for a confession.. > >> > >>Regards, > >>Jim > >>WD5JKO > >> > >>-----Original Message----- > >>From: [EMAIL PROTECTED] > >>[mailto:[EMAIL PROTECTED] Behalf > Of Darrell, WA5VGO > >>Sent: Tuesday, January 11, 2005 6:04 PM > >>To: Discussion of AM Radio > >>Subject: Re: [AMRadio] AM Amps > >> > >> > >>At 04:21 PM 1/11/2005 -0500, you wrote: > >> > >> > >>>In a message dated 1/11/05 12:14:43 PM, > [EMAIL PROTECTED] writes: > >>> > >>> > >>> > >>>>well all I can say is it works.. works well as a > matter of fact, and > >>> > > has > > > >>>>been for 6 years :) > >>>>I typically run between 350 and 400 watts of > carrier every day. It > >>> > > looks > > > >>>>great on the scope. Modulation envelope is > perfect. 100% modulation. > >>> > > In > > > >>6 > >> > >>>>years Ive only lost one tube, and I accidently > broke that one. > >>>> > >>>> > >>> > >>>I have to agree with Gary. You're seeing 1600 > watts PEP and 400W of > >> > >>carrier > >> > >>>OUT with a pair of GG 813s??? Does not compute! > Just curious, are you > >>>talking about 400W INPUT power to the linear > under carrier only condx > >>>maybe? If > >>>so, this would work out to about 133W carrier OUT > and each 813 > >> > > dissipating > > > >>>about 133W which would make more sense. > >>> > >>>Dennis D. W7QHO > >>>Glendale, CA > >> > >> > >>I'm with Dennis and Gary. To run a linear > amplifier at 375 watts of > > > > carrier > > > >>and 100% modulation, you will need around 800 > watts of plate dissipation. > >>For a short time a number of years ago, I tried > running an AF-68 and a > >>4-1000A linear amplifier. I could never get more > than around 450 watts of > >>carrier and stay linear............I didn't need a > heater in the shack > >>either. > >> > >>73, > >>Darrell, WA5VGO > >> > >> > >> > >>73, > >>Darrell, WA5VGO > >> > >> > >> > >> > >>______________________________________________________________ > >>AMRadio mailing list > >>Home: > http://mailman.qth.net/mailman/listinfo/amradio > >>Help: http://mailman.qth.net/mmfaq.html > >>Post: mailto:[email protected] > >> > >>-- > >>No virus found in this incoming message. > >>Checked by AVG Anti-Virus. > >>Version: 7.0.300 / Virus Database: 265.6.10 - > Release Date: 1/10/2005 > >> > >>-- > >>No virus found in this outgoing message. > >>Checked by AVG Anti-Virus. > >>Version: 7.0.300 / Virus Database: 265.6.11 - > Release Date: 1/12/2005 > >> > >>______________________________________________________________ > >>AMRadio mailing list > >>Home: > http://mailman.qth.net/mailman/listinfo/amradio > >>Help: http://mailman.qth.net/mmfaq.html > >>Post: mailto:[email protected] > >> > >> > > > > > > > ______________________________________________________________ > > AMRadio mailing list > > Home: > http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:[email protected] > > > > > > > > ______________________________________________________________ > AMRadio mailing list > Home: > http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] >
