The decision about what tubes to use is always a topic of a lot of conversation. For lower than 1000 Volt plate supplies, the multiple 6146s (I would use 3 in the RF and 4 in the modulator) is probably the best choice. Because of smaller tuning components in the tanks. Higher voltages means more spacing on everything. For higher voltages and fewer tubes the 812, 811, 805 and some others mention would be good. My favorite would be the push pull 812 class C final modulated by class B 811As running 1500 Volts or so.
John WA5BXO -----Original Message----- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of Ralph G. Rogers Sent: Sunday, May 10, 2009 5:41 PM To: amradio@mailman.qth.net Subject: [AMRadio] HF homebrew 100 plus watt vacuum tube Transmitter Hi Folks, I am planning on building an Amateur band HF homebrew 100 plus watt vacuum tube Transmitter. What I need is advice, information and ideas. I seek to find out what reasonable priced currently being manufactured 100 plus watt transmitter tubes are available and from what source. I wish to design around the tube so I can expect to find replacements when needed. Respectfully Yours, Ralph G. Rogers, K5RGR, DCR140T, TxCAP-3866 ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
