Hi Brian, Do you have a modulation scheme in mind? i.e., high-level, plate or controlled carrier or others????
While "rolling your own" can be done and certainly is rewarding when the whole magilla finally works...........there might be other avenues to explore. For example, there are rigs like the Eico 720 when coupled to the Eico 730 modulator gives a pretty nice low-power signal. Back issues of Electric Radio have one or two articles addressing this lashup. The fairly common Heath DX-60 family of AM/CW transmitters provides a good base for some nice AM signals when used with an ordinary linear amplifier. Done up right, they sound might impressive. Again, some nice Electric Radio articles address the finer points. But there are also opportunities for "low-power" AM rigs to be found in older ARRL handbooks and Bill Orr's publications over the years. Pick your tube, design the power supply and the rest is relatively simple. Just thinking out loud with you. Others may have more/better ideas. But accomplishing what you desire is not that difficult. Let us hear back from you. May be able to steer a particular design your way. 73 Chuck W4MIL -----Original Message----- From: Brian Zwiener <[email protected]> To: Discussion of AM Radio in the Amateur Service <[email protected]> Sent: Fri, May 7, 2010 4:49 pm Subject: Re: [AMRadio] Modulator question. Speaking of AM Transmitters, does anyone have a source for plans to build an AM ransmitter for 75 meters in the 15-25 watt range?Thanks. Brian/KF5CCN --- On Fri, 5/7/10, RICHARD GEORGE <[email protected]> wrote: From: RICHARD GEORGE <[email protected]> ubject: [AMRadio] Modulator question. o: "amlist" <[email protected]> ate: Friday, May 7, 2010, 2:34 PM I have over the years built several low power AM transmitters. I would like o build something a little bigger say in the 400-500 watt plate modulated. have been kicking around the idea of using one of the solid state mplifiers made for car audio driving a reverse connected audio transformer. have seen these audio output transformers available in the 200 watt range. understand that the RF output stage would have to be designed to fit the mpedence of the output transformer. Does this sound like it could be done? K6KWQ Dick Amps by "MORE POWER" ______________________________________________________________ ur Main Website: http://www.amfone.net MRadio mailing list earchable Archives: http://www.mail-archive.com/[email protected]/ ist Rules (must read!): http://w5ami.net/amradiofaq.html ist Home: http://mailman.qth.net/mailman/listinfo/amradio ost: [email protected] o unsubscribe, send an email to [email protected] with he word unsubscribe in the message body. This list hosted by: http://www.qsl.net lease help support this email list: http://www.qsl.net/donate.html _____________________________________________________________ ur Main Website: http://www.amfone.net MRadio mailing list earchable Archives: http://www.mail-archive.com/[email protected]/ ist Rules (must read!): http://w5ami.net/amradiofaq.html ist Home: http://mailman.qth.net/mailman/listinfo/amradio ost: [email protected] o unsubscribe, send an email to [email protected] with he word unsubscribe in the message body. This list hosted by: http://www.qsl.net lease 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
