[Elecraft] KSB2 Problem: Big attenuation of received signals

[W3FPR - Don Wilhelm]

Andrew,

Plug the KSB2 in again and be certain that it is properly positioned on the
headers.  It is easy to misplug the KSB2 - if you see the standoff and TP2
properly aligned with the holes in the SSB board, it probably is mounted
correctly.

As a check (but not a permanent fix) slide a small sheet of paper between
RFC1 and RFC2 and the adjacent crystal cans.  That is a quick check of
whether or not the windings of the chokes are shorting to the crystals - if
they are, rewind the chokes being careful not to scrape the insulation on
the wire.

Check the orientation of the diodes - all of them should have the banded end
away from the board.

Lastly (or maybe best doen first) check the soldering carefully,
particularly in the crystal filter area.

73,
Don W3FPR

> -----Original Message-----
>
> The problem is that the receiver became very quiet. I
> could still hear the strongest signals if I turn the
> AF Gain way up, and instead of S9 on the meter,
> they're way down to S1. The KSB2 manual specifically
> states (page 15, final step of "initial test") this
> should not happen, and if it does, to go to the
> troubleshooting section.  I confirmed about half of
> the DC measurements in the troubleshooting section. I
> noticed when I jiggle around RFC2 I get some noise in
> the receiver, and those little RFC1 & 2 toroids on the
> KSB board were a challenge to wind, so I'm wondering
> if I have a problem there.
>
>