[Amps] Centurion

[GARY SWARTOUT]

Thanks for the suggestions. We'll examine the switch and take it from there.

73
Gary K7GS

> From: jimw7ry at gmail.com
> To: ranchorobbo at gmail.com; amps at contesting.com
> CC: k7gs at msn.com
> Subject: Re: [Amps] Centurion
> Date: Thu, 29 Dec 2011 14:43:51 -0800
> 
> It's a Centralab switch. All he needs is the ceramic parts. The front part 
> of the switch is fine. The 10 meter contacts burned up. Not sure what the 
> circumstances were.
> 
> Gary, you may be able to remove the ceramic parts and send it to 
> Electro/Centralab and see if they will sell you the replacement parts. I 
> think all you need is the wafer itself. The rotor is
> probably ok?
> 
> 73
> Jim W7RY
> 
> 
> 
> 
> --------------------------------------------------
> From: "Rob Atkinson" <ranchorobbo at gmail.com>
> Sent: Wednesday, December 28, 2011 7:53 PM
> To: <amps at contesting.com>
> Subject: Re: [Amps] Centurion
> 
> > I have a Centurion and mine is open now as I am working on it.   I
> > have not focused on the band switch because I have not had to yet
> > (fortunately).  It looks like a PITA to replace.
> >
> > That switch is a custom job consisting of two wafers, one a standard
> > ceramic RF band switch type and the other a PC card material wafer
> > that is attached to a printed circuit board that is mounted on the
> > switch and is used to select the necessary tuned input circuit for a
> > given band.  That's the part that you will probably have to get from
> > Ten Tec, unless you want to disassemble the amp and build it back up
> > so it is functioning, but in a different way (YOUR way).
> >
> > The RF pi output network band switch part, i.e. the ceramic wafer at
> > the rear of the switch is probably a Centralab or Multi-Tech.   It
> > looks like it is 2 inches or a little over 2 inches diameter.
> >
> > It has 18 terminals, so it is 20 degrees, but 6 band positions.  There
> > are two bundles of shorting spokes, and they are separated by 100
> > degrees in both directions.  One bundle consists of 6 shorting spokes
> > 20 degrees apart; the other bundle consists of 2 that are shorted (all
> > 8 bonded to each other) and also 20 degrees apart.
> >
> > You can search for switches here:
> >
> > http://multi-tech-industries.com/rswitches.html
> >
> > http://www.electro-nc.com/rotarysearch.php
> >
> > (Centralab is now Electro.)
> >
> > It's not clear to me what you need--if all you need is the ceramic
> > wafer with the 18 contacts then you may be able to find that on-line
> > somewhere--that's probably the easiest thing to find.   You have to
> > get the switch out and measure it.   The rest of it is odd enough to
> > probably be a custom job.  If you need the Ten Tec built pc card part
> > of the switch, you will probably have to bite the bullet and pay them
> > for it.
> >
> > Or you can study the schematics and manual and figure out what the Ten
> > Tec part switches, and work out a scheme to do that some other way,
> > and use the rotary switch only for the output pi network.
> >
> > 73
> >
> > Rob
> > K5UJ
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>