I really did not say to maintain the dip with the load capacitor. When I tune the final of any Pi-network Tx I first set the dip with the PLATE capacitor. Then I adjust the coupling with the LOAD capacitor. And I always recheck the dip with the PLATE capacitor after making any adjustment to the LOAD capacitor.
And when I am done I DO RECHECK THE GRID DRIVE! Bob K5MYJ ----- Original Message ----- From: "rbethman" <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" <[email protected]> Sent: Sunday, November 23, 2008 2:51 PM Subject: Re: [AMRadio] Low Power AM? > Okay, > > Please explain: > > Bob Macklin wrote: > > > >> No Pete, > >> > >> I am saying to reduce the load capacitor and maintain the dip on > >> > > the plate > > > >> capacitor. > Now you say maintain dip with load capacitor. I am indeed Polish, BUT > you seem too JUST have contradicted what you said. > > Bob - N0DGN > > > Bob Macklin wrote: > > When I say "maintain the dip" I mean I recheck the dip changing the load > > capacitor. > > > > Bob > > K5MYJ > > ----- Original Message ----- > > From: "Peter Markavage" <[EMAIL PROTECTED]> > > To: <[email protected]> > > Sent: Sunday, November 23, 2008 2:34 PM > > Subject: Re: [AMRadio] Low Power AM? > > > > > > > >> I must be missing something in your words Bob (DGN). If, after operating > >> at some plate current and RF output using a PI network, and now you want > >> to reduce output, why would reducing the loading and re-dipping the plate > >> capacitor (to return to resonance), become "non-resonant" unless the > >> words that Bob (MYJ) used, "maintain the dip" means that he doesn't > >> re-dip the final after a loading control change. Since the beginning of > >> (my) time, the last thing I always do in a tune up procedure is to dip, > >> or check the dip, of the final. > >> > >> Pete, wa2cwa > >> > >> On Sun, 23 Nov 2008 16:08:51 -0500 rbethman <[EMAIL PROTECTED]> > >> writes: > >> > >>> Bob, > >>> > >>> I'm NOT Pete. He may feel insulted. LOL > >>> > >>> You're using a PI network, NOT a link tuned system. If you reduce > >>> loading, AND maintain plate dip, You will indeed reduse output AND > >>> go > >>> NON-RESONANT. > >>> > >>> This opens a whole other can of worms. > >>> > >>> Bob - N0DGN > >>> > >>> Bob Macklin wrote: > >>> > >>>> No Pete, > >>>> > >>>> I am saying to reduce the load capacitor and maintain the dip on > >>>> > >>> the plate > >>> > >>>> capacitor. > >>>> > >>>> It's the same as reducing the coupling on a link coupled final. > >>>> > >>>> Bob > >>>> K5MYJ > >>>> > >> ______________________________________________________________ > >> Our Main Website: http://www.amfone.net > >> AMRadio mailing list > >> Searchable Archives: http://www.mail-archive.com/[email protected]/ > >> List Rules (must read!): http://w5ami.net/amradiofaq.html > >> List Home: http://mailman.qth.net/mailman/listinfo/amradio > >> Help: http://mailman.qth.net/mmfaq.html > >> Post: mailto:[email protected] > >> To unsubscribe, send an email to [EMAIL PROTECTED] with > >> the word unsubscribe in the message body. > >> > >> > > > > ______________________________________________________________ > > Our Main Website: http://www.amfone.net > > AMRadio mailing list > > Searchable Archives: http://www.mail-archive.com/[email protected]/ > > List Rules (must read!): http://w5ami.net/amradiofaq.html > > List Home: http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:[email protected] > > To unsubscribe, send an email to [EMAIL PROTECTED] with > > the word unsubscribe in the message body. > > > > > > -- > Bob - NØDGN > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
