Hi All,
I tried using these two items together and am getting scratchy audio in the
headphones when I speak on USB even though the monitor is set to zero. When
I use the rear headphones out to feed the HA400 it is really bad and loud.
When I use the front headphone jack its medium loud but still
, 2009 2:13 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 Beringer HA400
Hi All,
I tried using these two items together and am getting scratchy audio in the
headphones when I speak on USB even though the monitor is set to zero. When
I use the rear headphones out to feed the HA400
Steve,
Just an idea - have you tried it on LINE OUT? It may be that you are
overdriving the input of the Beringer.
The other possibility is that you have an RF in the Shack problem and
the Beringer is reacting to the RF. Try it when connected to a dummy
load or in TX TEST. If that 'fixes'
, November 16, 2009 4:33 PM
To: Steven Pituch
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Beringer HA400
Steve,
Just an idea - have you tried it on LINE OUT? It may be that you are
overdriving the input of the Beringer.
The other possibility is that you have an RF in the Shack problem
Steve,
Thanks for those details. I am almost certain Jim Brown K9YC would
refer to this as a pin 1 problem, and that is the reason that bypass
caps are not likely to help.
You might be able to minimize it with some work to the Beringer - look
carefully at how the cable shields are routed. If
Thank you Don,
The HA400 actually has a very nice metal case, but the pots are on the board
and the plastic stems protrude out of holes. The mod to the case seems
doable. Also I would think some rg8 shield used as a braid bolted to the
case and going to the K3 might help. I didn't originally do
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