LOL Where do you start...... anything and everything ...there is such a HUGE
void in suppliers for the hobby the list would go on forever....but if it is so
please keep us informed !
......................................................................................................
73 VE3DV , Dave
> From: km1h@jeremy.mv.com
> To: ww4cox@embarqmail.com; amps@contesting.com
> Date: Sun, 12 Dec 2010 19:18:15 -0500
> Subject: Re: [Amps] PI-L Thoughts!
>
> It is slowly returning. Need suggestions on whats needed
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: Mitch Cox
> To: Carl ; Ulf (SM0NOR) ; ken.d.brown@hawaiiantel.net
> Cc: amps@contesting.com
> Sent: Sunday, December 12, 2010 3:05 PM
> Subject: Re: [Amps] PI-L Thoughts!
>
>
> Man, would I love for Radio Kit to still be in business.
> ----- Original Message -----
> From: Carl
> To: Ulf (SM0NOR) ; ken.d.brown@hawaiiantel.net
> Cc: amps@contesting.com
> Sent: Sunday, December 12, 2010 9:12 AM
> Subject: Re: [Amps] PI-L Thoughts!
>
>
> National Radio started the 2 section trend in the 1963 NCL-2000 and Alpha
> used it starting with the 8n series.
>
> Its not easy to modify an existing cap for a much lower minimum C as the end
> plates are still too close to the frame. There also has to be sufficient
> clearance between the 2 sections.
>
> The Alpha cap is 10-58pf and 16-210pf with 3000V spacing which was fine for
> the pair of 3CX800A7's they used at 2200V.
>
> In the mid 80's I designed and had built a dual section with 10-53pf and
> 23-180pf with 4500V spacing and sold quite a few thru Radiokit into the
> 90's.
>
> Carl
> KM1H
>
>
>
>
> ----- Original Message -----
> From: "Ulf (SM0NOR)" <ulf@sm0nor.com>
> To: <ken.d.brown@hawaiiantel.net>
> Cc: <amps@contesting.com>
> Sent: Sunday, December 12, 2010 3:41 AM
> Subject: Re: [Amps] PI-L Thoughts!
>
>
> > Ok. Thanks.
> >
> > I'm looking at my 25-300 C1 and I got the idea to "chop" it up in two
> > sections. It looks like a fairly simple procedure. Question is if the
> > smaller section will render in a value low enough? The procedure is non
> > reverseable :)
> >
> > Sent from my iPad
> >
> > On 12 dec 2010, at 09:31, Ken Brown <ken.d.brown@hawaiiantel.net> wrote:
> >
> >>
> >>> 1, add a smaller C1 to the existing and switch in/switch out
> >>>
> >> You probably do not need to switch in/out the smaller variable capacitor,
> >> because it will be an insignificant amount of additional parallel
> >> capacitance on the lower frequency bands. You only need to switch the
> >> larger variable capacitor out on the higher frequency bands.
> >>
> >> Another way of putting it:
> >>
> >> C1A = small variable
> >> C1B = large variable
> >>
> >> Band ....C1 total=
> >> 160...C1A+C1B
> >> 80...C1A+C1B
> >> 40...C1A+C1B
> >> 30...C1A+C1B
> >> 20...C1A+C1B
> >> 17...C1A+C1B
> >> 15...uncertain, maybe just C1A
> >> 12...C1A
> >> 10...C1A
> >>
> >> No need to switch C1A out for any band.
> >>
> >> DE N6KB
> >>
> >>
> >>
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
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