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Re: [Amps] Titan Band Switch Arcing

Subject: Re: [Amps] Titan Band Switch Arcing
From: "Wayne, W0ZW" <>
Date: Mon, 30 Oct 2023 10:54:32 -0600
List-post: <>
Thank you for your comments, Doug.  Although the solder job on the switch 
terminals looks good, resoldering would be a cheap and easy potential fix.

In looking at the mechanical design of the Titan Band switch assembly I 
discovered that the Band switch and related fixed caps and inductors are 
mounted on a separate sub-chassis directly on top of the main chassis.  By 
unsoldering just a handful of wires this sub-chassis (and the entire Band 
switch itself) can be completely removed from the main enclosure.  It also 
requires removing the front panel and disconnecting the Band switch shaft from 
the Low Pass Filter board.  This sub-chassis has a large cut-out underneath the 
Band switch which allows physical access and facilitates soldering and 
inspection of the switch.  I'm sure this is how Ten-Tec manufactured this 
portion of the output tank circuit.  It's just too tight to perform any work on 
these components otherwise.  

So, I am embarking on a major disassembly of my Titan.  I see no other way to 
access the switch without removing this sub-chassis.  It looks like I have a 
winter project ahead of me.  In the mean time, additional comments are very 
welcomed.  I still don't know why the switch is arcing.

Wayne, W0ZW

> Message: 1
> Date: Sun, 29 Oct 2023 12:29:28 -0400
> From: Douglas Zwiebel <>
> To: Amplifier Reflector <>
> Subject: Re: [Amps] Titan Band Switch Arcing
> Message-ID:
>       <>
> Content-Type: text/plain; charset="UTF-8"
> Not a Titan, but a Centurion.
> Recently, I also had arching and it also turned out to be the bandswitch.
> Resolder all of the connections on the bandswitch.
> Also, trace out the "far end" of wire coming off of the bandswitch and look
> for evidence of arcing there too.  I found that on mine.
> When I first opened the amp, I noted a blob of solder below the
> band-switch.  I don't know how, but apparently it just fell off.  Part of
> it was still "molded" in the shape of the wire where it has been "solder"
> to.
> I am the 4th owner for the amp.  I suspect that some things just fail after
> enough time (cycles).
> GL
> de Doug KR2Q
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