Gareth,
Yes, 100mV audio should be adequate to drive the KSB2.
Do you have the K2 wired to use an Elecraft or Icom microphone? If so,
try lifting the bias resistor to see if the DC bias is interfering with
the output level of your audio generator - instead of lifting the bias
resistor, you
I am currently in the process of assembly a KSB2 (REV E KSB2 PC Board) which
I purchased with my K2 in November 2011. I am currently completing the
installation of the resistors on the back side of the board. After I
completed installing the resistors I noticed that I had an extra 10K
resistor.
Fred,
Look carefully, that new manual does not match your KSB2. Yours has an
SSM2165 Speech Compressor and the new one uses an SSM2166 - the added
resistors support that new IC.
As far as the extra 10k resistor, one is supplied with every KSB2 for
use as a bias resistor if needed. It is
I recently bought a KSB2 that was advertised here. It's an early release,
rev B board, so I picked up a number of update kits and started assembly,
slowly and carefully, as Gary advises. I got through it in a couple
of evenings.
Last night, I installed it in my K2 and got INFO 080. Drat! I was so
Thanks for the suggestions. I followed them all. I
found some 27 AWG red enamel wire and re-wound RFC1
2, and I believe this is what fixed my problem. The
enamel on the wire that came with the KSB2 kit, seemed
to shear off with the sharp edges of the toroid cores,
and this may have been
My first post, this is regarding my attempt to install
the KSB2 option into my K2/100 #4363.
I built the KSB2 option, and removed C167 and the two
jumpers from the RF board, plugged in the KSB2 board,
applied power, and got the Elecraft on the display.
The problem is that the receiver became
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
Andrew Meier wrote:
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.
Be sure to check for PTTL (Poorly Tinned Toroid Leads).
--
73,
Vic, K2VCO
Fresno
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,
Hi all,
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
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
Neal,
A normal K2 will have more gain on 40 and 30 meters than on the other bands.
I would check the LPF for those bands carefully - number of turns on the
toroids (count the times the wire goes through the center - counting the
outside turns often results in a toroid with an extra turn), then
Hi all,
Thanks for giving some ideas!
I checked the resistors on the bottom of the ssb board, they are all
correct. I must say that trying to identify parts on the top of the
board is a real challenge, its so stuffed that its almost impossible!
Don, I redid the output amperage at 10 watts:
Your current readings don't look out of hand to me! 40 is normally higher
because that is the band that usually produces the greatest RF output. Your
readings are consistent with my K2.
Interesting that you say the output reads over 15 watts in all cases,...
Few K2's make 15 watts on 10. Many
In a message dated 21/02/05 14:53:44 GMT Standard Time, [EMAIL PROTECTED]
writes:
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
Neal,
Taking things in reverse order - go ahead and put the Noise Blanker itself
back in rather than the 6 dB pad resistors. It will only affect the receive
path and not the Transmit path.
OK - your current draw at a constant 10 Watts output looks just fine to me.
It is a bit unusual that your
Neal,
Just an additional note - I usually adjust the SSB Carrier balance by
looking at the RF output (with no audio signal) with my 'scope - I adjust
the carrier balance for minimum power output (compromising if necessary
between USB and LSB). You should find the proper point near the mid-point
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