|[AMRadio] AM Transmitter Advice??|
brett.gazdzinski at verizonbusiness.com
Tue Jan 31 14:25:22 EST 2006
I based my 813 rig on the article you talk about.
I did not do separate output decks but wound up with a
continuous coverage 1.5 to 30 mc setup.
A lot of the electronics (control, protection) I
got from that design though.
That article was very interesting, the decks wind up being quite small.
My modulator deck came right out of a QST article,
pair of 4cx250b's with minor changes.
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of W1EOF
> Sent: Monday, January 30, 2006 4:14 PM
> To: Todd, KA1KAQ; Discussion of AM Radio
> Subject: RE: [AMRadio] AM Transmitter Advice??
> No problem with them mounted horizontally if in the correct
> plane. Example:
> For years in the ARRL handbook 1960s there was an article
> that described
> separate 813x2 amp for each band, all rack mounted. As a
> young ham in the
> early 70s I would looke that and drool.
> The 813 is a great tube, certainly very high on the
> watt-per-dollar chart.
> It's always been one of my favorites along with the 810,
> 4-400, and the
> 4-125. I always thought the 4-125 would be great as a final
> for a say...
> 350W CW transmitter. Like the T-9er, but with more power out.
> Anyone needing projects, or potential projects email me off-list.
> No charge, I will give them away to a good home.
> Mark W1EOF
> > -----Original Message-----
> > From: Todd, KA1KAQ [mailto:ka1kaq at gmail.com]
> > Sent: Monday, January 30, 2006 3:46 PM
> > To: w1eof at hamnutz.com; Discussion of AM Radio
> > Subject: Re: [AMRadio] AM Transmitter Advice??
> > On 1/30/06, W1EOF <w1eof at hamnutz.com> wrote:
> > >
> > > I agree with Larry. I've been collecting the pieces for a 813x2
> > desktop amp
> > > for awhile now. I'm almost ready to begin.
> > Hmmm... interesting. I actually have a nice horizontally-mounted CW
> > 813 transmitter sitting up over the garage. I wonder what it would
> > take to add a modulator? I chuffed it into a Globe King cabinet
> > because I wanted to use the rack for something else, and there it
> > sits.
> > Yesterday while I was playing around at building a
> "homebrew" (ala Don
> > Chester) 40 meter dipole, I was listening on 40 to a few guys
> > discussing the venerable 813. One of them was Tom M...Marcellano?
> > W3BYM (I think). He's written a fair number of articles for ER as I
> > recall, probably a few about 813 rigs. I think he said it was his
> > favorite tube and had nothing but praise for it. At least one of the
> > other guys either had or was running a 813 rig also. Wish
> now that I'd
> > paid more attention, but it might've resulted in soldering my finger
> > instead of the antenna.
> > Has anyone ever mounted them horizontally to save space? I can't
> > remember if it's a single tube or a pair. Sure is compact. Power
> > supply is in the garage because it was too heavy to haul upstairs.
> > Looks like a Beastly 610 transformer on the chassis.
> > As an aside, I think K1JJ Tom is still building a rig with a pair of
> > 813s blown through Dietz lantern globes as chimneys. There were
> > pictures of it on amfone not long ago.
> > de Todd/'Boomer' KA1KAQ
> 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
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
> AMfone Website: http://www.amfone.net
> AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
More information about the AMRadio mailing list
This page last updated 17 Feb 2018.