[Elecraft] KSB2 Missing Errata

[Dan Barker]

I just finished the final tests of my new KPSK2, er ah, KSB2, and there =
are a couple things the book and errata missed. These should be added.

Firstly, the book says "with some mics it is necessary to connect 5V to =
AF through a resistor." The MH2 mic is listed in table 2 with no notes. =
It needs a note to place a 5.6K resistor across the jumpers AF and 5V. =
By the time you get to the instructions that involve plugging in the mic =
(and finding the resistor hidden it it's box), you've buttoned up the =
rig. Have to remove the FP, two jumpers, solder a resistor between them, =
and continue. Not very time consuming, but since this is the "party =
line" mic, it ought to go in flawlessly following the instructions =
directly.

Secondly, discovering there were Elecraft Instruction with the Heil =
Package (I thought), required getting the rig to fail some tests. =
Nothing looked amiss. All the volts were bang-on (even the switching =
Diodes) except U1 pins 21, 22, 23 and 24. But they all go to U3, and U3 =
was bang-on too. Odd. I couldn't make heads or tails of it. Tracing the =
audio (there was none) led me to the hidden resistor and instructions in =
the Heil packaging. Just as the sitching diodes voltage measurements =
specify conditions to be valid, we should ADD to the IC voltage =
measurement conditions "Mic plugged in AF baised to X.X volts" or =
whatever is required to get those measurements to match.

Thirdly, thanks for the jumpers, however, there was no hint of them in =
the book, and I'd already rummaged for enough (took a while - pulled 9 =
off an old 486 - hope I never need it!) by the time I found them in with =
the mystery resistor. A note that they are included (or including them =
with the KSB2 instead of the MH2) would have saved me a bunch of time.

As usual, all the suggested filter settings are off 300 to 500 Hz. I'll =
get it tuned back up, but I wonder if there is something different in my =
rig? Ah well, another post.

Dan.