I need a little help in understanding the entire picture correctly.
I see that having additional bypass C at the plate choke base, would help
prevent the power supply from becoming part of the tuned circuit. Would
additional L of the choke also be beneficial, as it would seem that less RF
current would be lost through the bypass C at the choke base? Or, is that
current insignificant? Or am I missing the entire plot?
Thanks,
Jeff - K1LE - CT ><>
----- Original Message -----
From: "2" <2@vc.net>
To: "Phil Clements" <philk5pc@tyler.net>; "Lynn" <no9z@soltec.net>; "AMPS"
<amps@contesting.com>
Sent: Thursday, May 29, 2003 9:54 AM
Subject: Re: [Amps] Re: 160M efficiency
> >> Yesterday I added 1600pf (4 doorknobs) to the base of the plate
> >> choke and noticed a
> >> significant change in output as well as stability. It seems the
larger
> >> metal tubes
> >> require more bypassing than found in some of the other designs.
> >
> >
> >All 160 meter amps need this, Lynn. It is just not as obvious at low
power.
> >You need 8000-10000 pf at the base of the plate choke for 160, especially
> >if you
> >are using a string of electrolytic capacitors in the HVPS. I use 10,000pf
> >@ 10kv
> >disk ceramics by Sprague here.
>
> ? Amen, Phil. Ameritron's 1000pF of +HV bypass C is clearly not good
engineering practice below 10MHz..
>
> >
> >(((73)))
> >Phil, K5PC
> >
> >
> >
> >_______________________________________________
> >Amps mailing list
> >Amps@contesting.com
> >http://lists.contesting.com/mailman/listinfo/amps
>
>
> Rich, AG6K, 805-386-3734, www.vcnet.com/measures
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
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