[AMRadio] AM Amps


ronnie.hull ronnie.hull at glowbugs.com
Thu Jan 13 12:43:34 EST 2005


good grief!!  Now thats an AMP!

R



---------- Original Message -----------
From: "James M. Walker" <chejmw at acsu.buffalo.edu>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Thu, 13 Jan 2005 11:48:34 -0500
Subject: Re: [AMRadio] AM Amps

> 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" <jcandela at prodigy.net>
> To: "Discussion of AM Radio" <amradio at mailman.qth.net>
> 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: amradio-bounces at mailman.qth.net
> > [mailto:amradio-bounces at mailman.qth.net]On 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, ronnie.hull at glowbugs.com 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
> >
> >
> >
> >
> > ______________________________________________________________
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------- End of Original Message -------




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