[Amps] T-T Titan 425
k4vud at hotmail.com
Thu Dec 2 19:43:56 PST 2010
My Titan 1 had some problems. I changed out all the filter caps and left a big space in the pwr supply due to the new ones being much smaller. However, the main fix was to replace the disc caps down near the RF output... 3 disks there close together and they kept burning up, one at a time. I replaced them with same, but put sleeving over the center one in insulation. Why it worked, I do not know, but no more such problems. 73,
Charles Harpole k4vud at hotmail.com
> From: km1h at jeremy.mv.com
> To: rja12 at comcast.net; amps at contesting.com
> Date: Thu, 2 Dec 2010 16:46:00 -0500
> Subject: Re: [Amps] T-T Titan 425 Q's
> I havent seen or heard of any failed caps in amps that new Bob.
> Ones in the mid to late 80's are due for a common sense PM and earlier ones
> are living on borrowed time. The 1986 LK-500ZC here had one cap a slight bit
> warm during a recent test so they all got changed. Other than some fixed
> load cap juggling to work with my 160/80M antennas everything else is
> original and the old Eimacs still crank out 1200W with 80W of drive.
> ----- Original Message -----
> From: "Bob Arenella" <rja12 at comcast.net>
> To: <amps at contesting.com>
> Sent: Thursday, December 02, 2010 12:57 PM
> Subject: [Amps] T-T Titan 425 Q's
> > Amp newbie here. I recently came into a Titan 425 as part of a larger
> > purchase. I kept a few items, sold off the rest, and have less than $200
> > invested in the amp, a MFJ 259 analyzer and an Astron 50 A supply. The
> > owner
> > told me the amp was only putting out about 50% of legal limit. I figured,
> > still a good deal, even if the PA's are soft. Turns out, the amp puts out
> > well in excess of the legal limit :<).
> > The only issue I see is that the fan doesn't run at low speed. Either the
> > switch or the buck winding on the xfmr, I guess. Don't see anything
> > zorched
> > in the RF deck or PS. T-T tells me this amp was built in 1994, and the
> > date
> > codes on the 3CX800A7's confirm this.
> > I would like to know if there are any "must do" mods or upgrades for this
> > amp? T-T tells me that the padder cap problem was in the very early
> > versions
> > of this amp, and shouldn't be a concern. How 'bout the going on 17 year
> > old
> > filter caps?
> > Thanks for your opinions!
> > 73 de bob
> > n2oam
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