Hi Todd: Sounds like a fun project. I use a Swan MK2 amplifier on am for 200 w out using two 3-500Zs, input is 30w from an Elmac AF 67. For 2 kvdc I think I would look into a pair of 813's running in grounded grid. The 813 is a very rugged tube and show up at the flea markets and at reasonable prices too. The 572B might be a good choice too but cost more. You said you needed a matching system and also that fewer parts is better. I recommend you avoid build an L tuner. That's the random wire tuner using one capacitor and one coil. I've used them before and they seem to put alot of RF in the shack. I got nipped a bunch of times using a metal D 104 mic. I switched to a T tuner - two caps, one coil and an a balun and the shack rf disappeared. Anyway, have fun! Greg WA7LYO Kinston NC ----- Original Message ----- From: "Todd Carpenter" <[email protected]> To: <[email protected]> Sent: Monday, October 05, 2009 10:29 AM Subject: [AMRadio] Any amplifier suggestions?
>I am interested is a simple design hf amplifier for am cw on 160-80/75-40. >These are the bands i operate on where the extra power would help. Fewer >parts count the better. Ultimately lower cost the better. I have power >supply parts and believe that i can generate around 2000 volts. I am slowly >researching tubes and am leaning toward 2 or 4 tubes that can basically >generate lots of watts at half to two thirds their ratings to prolong their >life span. Perhaps tubes such as 811's, 810's, 833's, 4-400's. I am open to >suggestions. I will need to build or acquire a heavy duty matching system >as part of the amp. My goal is at least 300 Watts AM. I do not want to mess >with systems that require cooling other than fans. I am not interested in >modes for this amp other than am and cw. It will almost exclusively be used >for am as i rarely use more than 5 watts on cw any way. Simpler cheaper is >better for me. I appreciate your suggestions. Todd > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: [email protected] > To unsubscribe, send an email to [email protected] 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 > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] 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
