Hmm, ok. Well just telling you what everyone else runs them at.
73,
Scott
----- Original Message -----
From: "Gary Schafer" <garyschafer@comcast.net>
To: "'KB0NLY'" <kb0nly@mchsi.com>; "'Jeff Blaine'"
<keepwalking188@yahoo.com>; "'RICHARD GEORGE'" <k6kwq@msn.com>
Cc: <amps@contesting.com>
Sent: Tuesday, March 10, 2009 1:26 PM
Subject: RE: [Amps] Choosing a Plate Transformer
> I know the minimum i'm shooting for, 2500v 600mA. This will be to run
> a
> > > single GI7B
2500 volts at 600 ma = 1500 watts input. You said it! :>)
73
Gary K4FMX
> -----Original Message-----
> From: KB0NLY [mailto:kb0nly@mchsi.com]
> Sent: Tuesday, March 10, 2009 1:50 PM
> To: garyschafer@comcast.net; 'Jeff Blaine'; 'RICHARD GEORGE'
> Cc: amps@contesting.com
> Subject: Re: [Amps] Choosing a Plate Transformer
>
> But I don't have 1500w input?
>
> 73,
>
> Scott
>
>
> ----- Original Message -----
> From: "Gary Schafer" <garyschafer@comcast.net>
> To: "'Jeff Blaine'" <keepwalking188@yahoo.com>; "'RICHARD GEORGE'"
> <k6kwq@msn.com>
> Cc: <amps@contesting.com>
> Sent: Tuesday, March 10, 2009 12:41 PM
> Subject: Re: [Amps] Choosing a Plate Transformer
>
>
> I think that the GI7B has a 350 watt plate dissipation. 1500 watts input
> at
> 60% efficiency = 900 watts out. 1500 -900 = 600 watts of plate
> dissipation!
>
> The tube will cook.
>
> 73
> Gary K4FMX
>
> > -----Original Message-----
> > From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On
> > Behalf Of Jeff Blaine
> > Sent: Tuesday, March 10, 2009 12:03 PM
> > To: RICHARD GEORGE
> > Cc: amps@contesting.com
> > Subject: Re: [Amps] Choosing a Plate Transformer
> >
> >
> > Hi Richard,
> >
> > I'm curious what you base that on?
> >
> > 73/jeff/ac0c
> >
> >
> > RICHARD GEORGE wrote:
> > > !500 watts input to a single GI7B. That is going to be awfull hard on
> > the
> > > tube.
> > >
> > >
> > > ----- Original Message -----
> > > From: "KB0NLY" <kb0nly@mchsi.com>
> > > To: <amps@contesting.com>
> > > Sent: Tuesday, March 10, 2009 8:30 AM
> > > Subject: [Amps] Choosing a Plate Transformer
> > >
> > >
> > > I'm thinking about slowly scrounging parts to build another amp in the
> > > future, it will be a ways off so in no hurry, and i was wondering how
> > one
> > > chooses a plate transformer.
> > >
> > > I know the minimum i'm shooting for, 2500v 600mA. This will be to run
> a
> > > single GI7B.
> > >
> > > I was thinking about using those Far Circuit boards for constructing
> the
> > > doubler and rectifier. It looks like the average factor is 2.8.
> Which
> > > means for 2500v i would need a transformer with a secondary of at
> least
> > 893
> > > volts (rounded up). But what should i do on the current capacity
> side,
> > > should i look for something as high as a 1 amp transformer? Most of
> the
> > > ones i am finding on eBay for example are 500mA or smaller. I could
> > > probably get away with .500 mA.
> > >
> > > The question is, does one loose ampacity with the double circuit, or
> > does
> > > the current remain constant? I can't seem to find any notes in the
> > handbook
> > > articles on the subject of choosing a transformer. This is why the
> last
> > amp
> > > i built i used a donor FL-2100B so i wouldn't have all the questions
> on
> > > constructing the power supply. But the next time around i want to
> build
> > the
> > > power supply from scratch and learn more about HV supplies!
> > >
> > > The 6M amp i just built is working great by the way. It will do 500w
> > but i
> > > keep it around 400w. I checked into a net this weekend that a nearby
> > club
> > > holds on 6m, they were suprised how loud i was as i'm usually the most
> > > distant and sometimes one of the weekest for them to hear.
> > >
> > > 73,
> > >
> > > Scott KBØNLY
> > >
> > > www.kb0nly.net
> > >
> > > _______________________________________________
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> > > Amps@contesting.com
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> > >
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> > >
> >
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