Re: [TenTec] Titan 425 front panel treatments/schemes

["Bob McGraw - K4TAX" <RMcGraw@Blomand.net>]

Operated correctly, tubes of this type should last the average ham at least 
10 to 15+ years.  This is figured on 5 hrs per day and 5 days per week of 
usage.  That's a lot of ham activity.
Of course that life projection depends largely on how bad and frequently and 
long they are abused.
73
Bob, K4TAX


----- Original Message ----- 
From: "A R" <raf_3@msn.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Wednesday, July 09, 2014 10:08 PM
Subject: Re: [TenTec] Titan 425 front panel treatments/schemes


> I believe they're Chinese mfg branded "TAYLOR". Can't speak to their life 
> or reliability.
> Allen
>  ----- Original Message ----- 
>  From: k6jek<mailto:k6jek@comcast.net>
>  To: Discussion of Ten-Tec Equipment<mailto:tentec@contesting.com>
>  Sent: Wednesday, July 09, 2014 7:54 PM
>  Subject: Re: [TenTec] Titan 425 front panel treatments/schemes
>
>
>  3CX800A7's are cheaper than I remember. When I blew up the ones in my 
> Titan through grievous operator error, I ended up buying pulls rather than 
> mortgage the house but I see a matched pair of Taylors on RF Parts for 
> only $888.
>  I wonder who Taylor is. Can't be the old Taylor, can it?
>
>  Jon
>
>
>
>  On Jul 9, 2014, at 6:09 PM, A R wrote:
>
>  > Thanks Barry.
>  >
>  > That link was really useful. It looks like the #1 amp in question is 
> the third production variant described on the ref link. Owner says the 
> nameplate specifies Model 425, s/n 91A10160. The #2 amp looks to be the 
> first production variant described on the link. Owner says the nameplate 
> specifies Model 283, s/n 00323 (although the front panel is marked TITAN 
> 425).
>  >
>  > The #1 (third production variant) amp is kaput. According to the owner, 
> it suffered catastrophic failure......burned HV components (resistor) and 
> wire in the RF deck, including the plate choke. This amp's bandswitch does 
> not have "10"m marked on the front panel, but the bandswitch can be 
> rotated to that unmarked position (for what that's worth).
>  >
>  > The #2 (first production variant) amp is allegedly healthy, and does 
> have the panel-marked 10m position for the bandswitch.
>  >
>  > Owner has one power supply that was originally paired with the #2 amp. 
> Hope it's compatible with the #1 amp.
>  >
>  > I'll get an opportunity to personally inspect the amps this weekend. 
> Sounds like the #1 amp is a project amp, but it wouldn't be the first 
> "project" radio I ever bought.
>  >
>  > Allen---W7GIF
>  >  ----- Original Message ----- 
>  >  From: Barry 
> N1EU<mailto:barry.n1eu@gmail.com<mailto:barry.n1eu@gmail.com>>
>  >  To: Discussion of Ten-Tec 
> Equipment<mailto:tentec@contesting.com<mailto:tentec@contesting.com>>
>  >  Sent: Wednesday, July 09, 2014 5:05 PM
>  >  Subject: Re: [TenTec] Titan 425 front panel treatments/schemes
>  >
>  >
>  >  Titan color and vintage described at
>  > 
> http://www.tentecwiki.org/doku.php?id=425versions<http://www.tentecwiki.org/doku.php?id=425versions<http://www.tentecwiki.org/doku.php?id=425versions<http://www.tentecwiki.org/doku.php?id=425versions>>
>  >
>  >  Barry N1EU
>  >
>  >
>  >  On Wed, Jul 9, 2014 at 9:06 PM, A R 
> <raf_3@msn.com<mailto:raf_3@msn.com<mailto:raf_3@msn.com%3Cmailto:raf_3@msn.com>>> 
> wrote:
>  >
>  >> I've run across two 425's, each with different front panel color 
> schemes
>  >> and knob styles.
>  >>
>  >> #1 has a light colored front panel (about the same as a Corsair II),
>  >> fine-serrated tune and load knobs, and no 10m legend marked on the 
> panel.
>  >> Front panel is marked "TITAN" (no 425) under the TT insignia.
>  >>
>  >> #2 has a dark colored front panel (about the same as a Corsair (not 
> II)),
>  >> finger-size flutes on the tune and load knobs, and 10m legend marked 
> on the
>  >> panel. Front panel is marked "TITAN 425" under the TT insignia.
>  >>
>  >> Don't yet know the serial numbers of either amp, but just based on the
>  >> color schemes and knob styles, I presume the #1 amp is the later
>  >> production, and the #2 an earlier production amp.
>  >>
>  >> Is it possible to ascertain the production vintage just by virtue of 
> the
>  >> color scheme and knob style, or does one really need the nameplate 
> data
>  >> (like s/n)? Any meaningful changes during the production run to 
> correct
>  >> reliability issues on early units?
>  >>
>  >> Thanks....
>  >> Allen---W7GIF
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