I would say keep it symmetrical, you can get rid of any problems with the input/output when you neutralize the circuit.
The push pull stuff is very forgiving. Brett N2DTS > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of ne1s > Sent: Monday, February 06, 2006 3:31 PM > To: AM Radio Reflector; [EMAIL PROTECTED] > Subject: [AMRadio] Push-pull Triode HF PA layout question > > Hello all, > > I humbly request the experience-based advice of this esteemed group. > > Background: > I am working on a project, part of which involves completion of 1930s > Push-pull trode PA deck for 80M - 10M. Notice I said > "completion," not > "construction." This deck already has the plate tank components, tube > sockets, and neutralizing capacitors mounted on a beautifull > black-wrinkle > chassis & panel. The axis bisecting the holes for the tubes > is parallel to > the front panel, the plate tank air variable (split stator) > is perpendicular > to the front panel, and the plate tank coil (plug-in jack-bar style - > actually I'll be using BC-610 coils, link-coupled to the antenna) is > centered directly behind the plate tank capacitor, with its > axis parallel to > the front panel. What this deck lacks is a grid tank circuit, > which I need > to add. The tubes will be 812s or T-55s, and will be > plate-modulated for 250 > - 300W output. > > Question: > What is the worse sin: lack of physical symmetry, or proximity of the > gazinta to the gizouta? It seems that I'll have to compromize > one or the > other in adding the grid tank circuit, based on the present > layout. The grid > tank will be link-coupled to the exciter. > > Thanks for your assistance, > > -Larry/NE1S > ______________________________________________________________ > 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 >
