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[AMPS] MFJ-259 and matching circuits

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Subject: [AMPS] MFJ-259 and matching circuits
From: (Len Schaier)
Date: Tue, 02 Feb 1999 11:43:12 -0500

Have you ever used the Autek RF1 and, if so, how do they compare?


At 09:20 AM 2/2/99 -0600, Jon Ogden wrote:
>Howdy all,
>Just wanted to let everyone know how simple an MFJ-259 makes tuning 
>matching circuits.  It's like child's play.  Last night I did the input 
>circuits for my amp.  I simulated the impedance of the 4-1000 by placing 
>appropriate resistors and caps to ground at the cathode pins of the tube 
>socket.  Then I was able to tweak each input network for almost perfect 
>SWR.  20, 15 and 10 meters are less than 1.15:1 across their entire bands 
>(actually a good bit less).  And 80 and 40 meters are less than 1.5:1 
>across their bands.  I could play with 80 and 40 some more but it's 
>probably not worth it.
>The nice thing about this was that I was able to tune up everything in 
>place.  And it takes into account all of the other things like blocking 
>caps, filament choke, etc.  It really works well.  I wish I would have 
>had it in the past.  It is worth the investment.  Just wish mine was the 
>new "B" model.  Oh well....the price was right!
>It ends a lot of trial and error.
>Jon Ogden
>"A life lived in fear is a life half lived."
>FAQ on WWW:     
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