[Elecraft] KSB2 Problem

[W3FPR - Don Wilhelm]

Neal,

The Hi-Cur messages are likely not due to the KSB2 installation.
Torubleshoot the Hi-CUR problem first.

The Hi-CUR problem is most likely associated with either the Low Pass
filter, OR a problem with the RF detection and the related transmit ALC.

Do you get the Hi-CUR warnings at all settings of the Power Control?  Do the
Hi-CUR messages appear on only some bands?  Do you get the Hi-CUR messages
in CW mode, or only in SSB mode?  The answer to those questions will tell
where to begin looking for the problem.

Orientation of Q2 - one side is slightly rounded (or rather the corners are
'cut off'), and that is the only real way to tell which side is which.  Do
not rely on which side is silver (and contains the labeling) - I believe
that point is made clear in the K2 manual.

73,
Don W3FPR


> -----Original Message-----

> I am trying to install the KSBS2 into my K2.
>
> Problem symptoms are that I get the Hi Current warning, plus I get no
> variance on my separate receiver when trying the fine balancing.
>
> The rest of the alignment went okay, SSBA on BAL gave me good nulls
> with tweaking R1 both on USB and LSB (I just cannot hear any null with
> the receiver. I get a very strong carrier (S9+) on my separate receiver
> with SSBA at 3.
>
> Doing the voltage checks on rx, everything looks okay with the
> exception of:
> U1, pin 22 - 5.6v instead of 0.2
> U2, pin 5 - 5.95v instead of 0.6
> U3, pin 6 - 1.4v instead of 0
> U4, pin 3 - 5.95 instead of 0.6
>
> Since I get the hi cur warning I have not tried any tx voltage
> measurements.
>
> I looked at the archives and saw some people put RF board Q2 in
> backwards but the 'silver' side is facing the front of the rig.
>
> Any ideas?
>
> N
>
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