Hi Rick, No, I got it right.. The audio (20 watts) is fed to to the screen grid & control grid (tied together)via a transformer (don't know the specs on that guy, yet) with one side of the xfmr going to one tube and the other side to the other tube..
Keep me apprised on that modulation xfmr.. Tnx &73, Larry KQ4BY --- Rick Brashear <[EMAIL PROTECTED]> wrote: > Larry, > > Did you mean to type "200" watts of audio? I have a > couple of > modulation transformers, but I'm not sure of the > ratios, I'll look. > Both are well capable of 300 watts. > > Regards, > Rick/K5IZ > > > Larry Keith wrote: > > >I have been looking at HB AM Xmtr designs. > > > >One of the more interesting ones can be found on > the > >amwindow.org web site. It is a pair of 813's > >modulated by a pair of 813's. That makes it > >interesting to me since I already have a stash of > >813's! > > > >The designs doesn't look too complex. It requires > >about 5 - 10 watts of RF drive and 20 watts of > audio. > >Those should be easy enough. > > > >>From looking at the xmtr and power supplies > >schematics, it appears that the only "scare" parts > are > >the modulation transformer and the Heising choke. > >Would anyone care to comment of availiability of > such > >items? Specs shown are: > > > >Mod Xfmr -- 300 - 500 Watts, 2:1 step down. > > > >Heising choke: 50 H @ .5 A > > > >73, > > > >Larry > >KQ4BY > > > >Larry Keith > >231 Shenandoah Trail > >Warner Robins, GA 31088-6289 > >[EMAIL PROTECTED] > >478-329-0030 > > > > > >__________________________________________________ > >Do You Yahoo!? > >Tired of spam? Yahoo! Mail has the best spam > protection around > >http://mail.yahoo.com > >______________________________________________________________ > >AMRadio mailing list > >Home: > http://mailman.qth.net/mailman/listinfo/amradio > >Help: http://mailman.qth.net/mmfaq.html > >Post: mailto:[email protected] > >AMfone Website: http://www.amfone.net > >AM List Admin: Brian Sherrod/w5ami, Paul > Courson/wa3vjb > > > > > > > > > ______________________________________________________________ > AMRadio mailing list > Home: > http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul > Courson/wa3vjb > Larry Keith 231 Shenandoah Trail Warner Robins, GA 31088-6289 [EMAIL PROTECTED] 478-329-0030 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
