[Elecraft] KX3: ALC on digital issue

[Edward R Cole]

Hmm!  That would explain what happened in 2m digital mode eme the 
other day.  I tried changing drive level to my 8877 by raising the K3 
PWR level and the amplifier stopped outputting (anode went from 780ma 
to 80ma (quiescent load)).  Checking drive level on my bird power 
meter showed it dropped from 55w to 5w??  K3 PWR level had dropped to 
0.10mw (running transverter mode).  So I reset it to 0.39mw and 
re-keyed into transmit and I again had 55w drive and 1300w output; 
never repeated the fault.

I wondered what had caused this.  This was using the K3 and not a KX3 
but perhaps the firmware does strange things if you try readjusting 
RF PWR while in xmit mode (PTT keyed)?

If the display switches to ALC then one could be adjusting AF drive 
instead of RF power (but how? since Line-in is adjusted by the 
SPEED/MIC knob and not CMP/PWR.  (could I have grabbed the wrong knob?).

Hasn't repeated so may be just one of those "things".

73, Ed - KL7UW
sorry this is old e-mail; catching up reading the digest today.

Date: Fri, 5 Feb 2016 09:32:00 -0700 (MST)
From: Jim Rodenkirch <rodenkirch_llc at msn.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KX3: ALC on digital issue
Message-ID: <1454689920921-7613607.post at n2.nabble.com>
Content-Type: text/plain; charset=us-ascii

meant to type, ".......looks to me like the set power when you start
transmitting in JY9/65 and, if you touch the pwr control knob after you
start transmitting, the KX3 switches into a "display your ALC
setting.....just sayin'



73, Ed - KL7UW
http://www.kl7uw.com
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