[Elecraft] Tuning AL-811H

[Sandy]

If you are interested in doing the job totally "right" when using SSB, the 
only way to be assured of good linearity in the amplifier, is to use a 
two-tone test oscillator fed into the audio input and a monitor oscilloscope 
that gives a trapezoidal test pattern.   Yes, I know a lot of people use a 
CW carrier to do that and are successful at least some of the time.  It is 
easy to mistune this way and NOT get good linearity and maximum `PEP output 
however.  This degrades your signal and often times may disturb QSO's up or 
down the band with non-linearity products.

Cheapest test scope used to be the Heathkit SB-610 which has a built in 2 
tone test oscillator.  I think Yaesu and Kenwood also made these as well. 
Once you get used to the procedure it is easy and fast and assures a very 
clean and potent signal.

73,

Sandy W5TVW
-----Original Message----- 
From: Ian Kahn - Ham
Sent: Thursday, January 19, 2012 9:51 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] Tuning AL-811H

I have a question about tuning an AL-811H amplifier with my K3.  When I
used my FT-857D in the shack, I would tune to the antenna in FM mode.
However, I don't have the FM filter on my K3.  I tried tuning the amp
using AM, but I don't have that filter either.  So, what is the best
mode to use that allows me to briefly transmit an uninterrupted carrier
so I can get this amp set up and the settings written down?  BTW, after
going through this, the saving for the KPA500/KAT500 will soon begin.

Thanks everyone for the assist.

73,

--Ian
Ian Kahn, KM4IK
Roswell, GA
km4ik.ian at gmail.com
K3 #281, P3 #688

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