The unit I have has a separate B+ supply for the screens. So would this be self-modulating then?
-Tom ----- Original Message ----- From: "ne1s" <[EMAIL PROTECTED]> To: "Discussion of AM Radio" <[email protected]> Sent: Wednesday, October 20, 2004 8:56 AM Subject: [AMRadio] Re: B&W 5100B Audio Mods > i am not familiar with the 5100B, but I would be VERY surprised if the > screens weren't modulated as well as the plates - it is absolutely necessary > to achieve 100% modulation of tetrode, pentode, or beam-power calss C RF > stages. This is usually done with this class of transmitters (~100W > commercially-manufactured ham AM rigs)with a screen droping resistor from > the modulated plate supply. It can also be done with a dropping resistor > from the unmodulated B+, or an audio choke from a voltage source equal to > the desired screen voltage; in these cases, the screens self-modulate. > > GL, > -Larry/NE1S > > Tom Elmore writes: > > > Does, anyone know of a source for audio mods for the B&W 5100B > > transmitter. I wonder if anyone has tried to modulate the screens in > > addition to the plate of the finals. It appears the screens use a different > > power supply than the plates of the finals. > > > > Thank You > > Tom Elmore KA1NVZ > > Anchorage Alaska > > > > ______________________________________________________________ > > AMRadio mailing list > > Home: http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:[email protected] > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] >
