[Elecraft] KXPA100 amp and ATTN switch

[Edward R Cole]

Larry,

I have the same combination (KX3 + KXPA100) and my KX3 drives the amp 
fully with output of 5 to 7w.  Takes more drive on 6m.  Each 
band  takes a different drive level.  It seems to me that does not 
track between bands.  I have to manually change the drive level.

But then I am not controlling the KXPA100 with the control line and 
only using PTT.  When mobile I use the RJ45 connection.
Most of the time my KX3 is on either 6m or 2m.  I use my K3 for HF or 
with transverters for VHF+.

I have used the 3-dB attenuator on occasion when I want to drive very 
low (getting 11w output for driving my 6m 1000w amp).  The KX3 or 
K3/10 only give me 8w max on 6m so need the KXPA100 as a driver.

73, Ed - KL7UW

From: Larry Naumann <n0sa at att.net>
To: elecraft at mailman.qth.net
Subject: [Elecraft] KXPA100 amp and ATTN switch
Message-ID: <909178D7-FE1B-4995-9383-A86CAB441655 at att.net>
Content-Type: text/plain;       charset=us-ascii

I just connected my new KXPA100 to my KX3 via a home-brew KX3-KXPA100 
Adapter Cable.
Everything works just fine if I have the 3dB attenuator switch set to IN.
I fI set it to OUT/AUTO as described in the manual I end up 
overdriving the amp, meaning the power out is much higher
than set on the KX3.
All the other functions work just fine.
Anyone have any ideas?
Larry
n0sa


73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com