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. 73, Mark W1EOF > -----Original Message----- > From: Todd, KA1KAQ [mailto:[EMAIL PROTECTED] > Sent: Monday, January 30, 2006 3:46 PM > To: [EMAIL PROTECTED]; Discussion of AM Radio > Subject: Re: [AMRadio] AM Transmitter Advice?? > > > On 1/30/06, W1EOF <[EMAIL PROTECTED]> 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
