[TenTec] Titan 425 front panel treatments/schemes

[A R]

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 at gmail.com> 
  To: Discussion of Ten-Tec Equipment<mailto:tentec at 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>

  Barry N1EU


  On Wed, Jul 9, 2014 at 9:06 PM, A R <raf_3 at msn.com<mailto:raf_3 at 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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