Fred:

Thanks to the help and very patient guidance of Kevin (K7RX), I am now using 
an Ameritron AL811H amplifier.  With a great cheat sheet that Kevin 
designed, the steps to tuning the amplifier are not very hard at all.

You will need a good manual tuner, though, if you are planning to use the 
amplifier on frequencies where your antenna might not quite be resonant for 
some of your preferred  operating bands.

Actually, I did swap out the 811's in my AL811H for some more robust 572B's, 
but still have the 811's set aside as a back-up if needed.

I'll be happy to help you in any way I can, just as Kevin did for me.

73 from Tom Behler:  KB8TYJ

----- Original Message ----- 
From: "Fred Adams" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 13, 2010 11:46 AM
Subject: Tube amplifiers


Are any of you guys using or have you used an amplifier with 811 tubes?  I
have heard some blind hams say that amplifiers with 811 tubes are not very
easy to tune, what do you think?  I was thinking of getting one or a single
3-500 tube amplifier.  I would appreciate your comments.  I purchased a new
Ameritron AL80B several years ago and didn't like it so I swapped it off.



Best wishes,


FRED ADAMS W4HC
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