The Bill Orr handbooks are best. 4-250/400 tubes like 2500 to 4000 volts on the plates, they don't work as well at lower voltages.
All the designs are somewhat standard, you do not need a final product, all the designs are the same, just the tubes change. Pie-net or push pull, screens or not, there is not much else. I look at all the designs I can find and take things I like from each design, and add my own stuff. I like FULL metering, grid voltage, grid current, screen voltage and current for each final tube, plate current, plate voltage, filament voltage. I like resetable overload relays in screen circuits. I like grid leak bias with a fixed protection bias, with the diode that allows the grid leak to go as high as it wants. I like a big pot so I can adjust the grid leak resistance. I like a choke and big pot to allow the screens of a final to self modulate. I like a variac for bias and screen voltage, so you can set the voltages anywhere, even use it as a linier amp. I like moderate voltage tubes, like the 811/812 or 813's, as under modulation, the voltage can more then double with voice peaks, and 8000 plus volts on things takes special care. Brett N2DTS > > I am in the thinking stages of my next rig and would like some ideas. > > I am thinking of a pair of 813's or maybe even 4-250's but I > can't seem > to find any specific plans or designs on line. > > There must be lots of them out there. > > I found a thing called the 813 Maul which is 813's modulated by 813's > but that is the only one. > > Any help? Any other ideas? > > js > > > -- > PHOTO OF THE WEEK: http://schmidling.com/pow.htm > Astronomy, Beer, Cheese, Fiber,Gems, Sausage,Silver > http://schmidling.com > > ______________________________________________________________ > AMRadio mailing list > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Partner Website: http://www.amfone.net > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
