I agree with Larry. I've been collecting the pieces for a 813x2 desktop amp for awhile now. I'm almost ready to begin. I have heard from many AM ops that with the correct setup, a linear amp works great. As for the operation of 813s on 10M, Ronnie is correct that some people have had trouble there. I have some information from a ham who built an amp that runs from 160 - 10M. All it took was specific consideration of the interelectrode capacitance on 10M. If you are really interested I could email you the scans he sent me (once I get an OK from him).
Best of luck on it and please keep us all informed as to your progress! 73, Mark W1EOF > -----Original Message----- > From: ronnie.hull [mailto:[EMAIL PROTECTED] > Sent: Monday, January 30, 2006 3:11 PM > To: Discussion of AM Radio > Subject: Re: [AMRadio] AM Transmitter Advice?? > > > > > Larry > for years I used a pair of 813's in grounded grid and drove them with a > ranger. It produced great sounding audio. I still have that as my > backup to my > globe king. > > 813's are great tubes. The only drawback for me is I like to > operate on ten > meters and 813's are shakey at best, up there. > > good luck on your project, Iknow you will enjoy it. > > ronnie - W5SUM > > ---------- Original Message ----------- > From: Larry Keith <[EMAIL PROTECTED]> > To: Discussion of AM Radio <[email protected]> > Sent: Mon, 30 Jan 2006 12:06:43 -0800 (PST) > Subject: [AMRadio] AM Transmitter Advice?? > > > Well, Let's see if we can change the subject.. 8-) > > > > I am gathering ideas for a homebrew AM transmitter.. > > > > My friend, KR1S (Jim Kearman) is designing an AM > > transceiver, for me. We plan for this to be a > > solid-state unit that will deliver about 100 watts > > out. It will be single band (75 meters) and I have > > been considering using that to feed a homebrew linear. > > I have the makings of a 2 x 813 amp thanks to my and > > Jim's hamfesting efforts. > > > > So far, we have been reading and kicking around ideas. > > It seems that with the derating of the amp to handle > > the continuous carrier, etc.. may be more trouble than > > it is worth. > > > > So, I would be interested in opinions as to the > > relative merits of using a linear vs high-level > > modulation. And, pointers to existing circuits would > > be helpful.. > > > > Any ideas? > > > > 73, > > > > Larry > > KQBY > > > > Larry Keith > > 231 Shenandoah Trail > > Warner Robins, GA 31088-6289 > > [EMAIL PROTECTED] > > 478-329-0030 (home) > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam protection around > > http://mail.yahoo.com > > ______________________________________________________________ > > AMRadio mailing list > > Home: http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:[email protected] > > AMfone Website: http://www.amfone.net > > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > ------- End of Original Message ------- > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06 > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
