diff --git a/pc/data/20110106/hallloop01.txt b/pc/data/20110106/hallloop01.txt
new file mode 100644
index 0000000..4e025cb
--- /dev/null
+++ b/pc/data/20110106/hallloop01.txt
@@ -0,0 +1,21 @@
+# keithley    N (turn)      V(measured)  
+# (A)   (turn)   Volt
+0.001, 50, 0.0112
+0.002, 50, 0.0239
+0.003, 50, 0.0367
+0.004, 50, 0.0495
+0.005, 50, 0.0622
+0.006, 50, 0.0748
+0.007, 50, 0.0877
+0.008, 50, 0.1005
+0.009, 50, 0.1132
+0.01, 50, 0.126
+0.02, 50, 0.254
+0.03, 50, 0.382
+0.04, 50, 0.509
+0.05, 50, 0.637
+0.06, 50, 0.762
+0.07, 50, 0.868
+0.08, 50, 0.933
+0.09, 50, 0.969
+0.10, 50, 0.989
diff --git a/pc/data/20110106/hallloop02.txt b/pc/data/20110106/hallloop02.txt
new file mode 100644
index 0000000..c17f8ee
--- /dev/null
+++ b/pc/data/20110106/hallloop02.txt
@@ -0,0 +1,12 @@
+# keithley    N (turn)      V(measured)  
+# (A)   (turn)   Volt
+0.1, 1, 0.0237
+0.2, 1, 0.0487
+0.3, 1, 0.0737
+0.4, 1, 0.0989
+0.5, 1, 0.1239
+0.6, 1, 0.1490
+0.7, 1, 0.1740
+0.8, 1, 0.1990
+0.9, 1, 0.2242
+1.0, 1, 0.2492
diff --git a/pc/data/20110106/hist.dat b/pc/data/20110106/hist.dat
new file mode 100644
index 0000000..c824b4d
--- /dev/null
+++ b/pc/data/20110106/hist.dat
@@ -0,0 +1,61 @@
+ -1.50000000e+01 7.00000000e+02
+ -1.45000000e+01 1.15000000e+02
+ -1.40000000e+01 1.97000000e+02
+ -1.35000000e+01 4.71000000e+02
+ -1.30000000e+01 7.90000000e+02
+ -1.25000000e+01 4.40000000e+02
+ -1.20000000e+01 6.45000000e+02
+ -1.15000000e+01 8.67000000e+02
+ -1.10000000e+01 1.94000000e+03
+ -1.05000000e+01 2.67300000e+03
+ -1.00000000e+01 1.37900000e+03
+ -9.50000000e+00 2.15900000e+03
+ -9.00000000e+00 2.42800000e+03
+ -8.50000000e+00 4.02200000e+03
+ -8.00000000e+00 4.82600000e+03
+ -7.50000000e+00 3.69500000e+03
+ -7.00000000e+00 3.55800000e+03
+ -6.50000000e+00 7.81100000e+03
+ -6.00000000e+00 8.20900000e+03
+ -5.50000000e+00 7.61200000e+03
+ -5.00000000e+00 6.88400000e+03
+ -4.50000000e+00 8.11600000e+03
+ -4.00000000e+00 7.71300000e+03
+ -3.50000000e+00 1.19900000e+04
+ -3.00000000e+00 7.13100000e+03
+ -2.50000000e+00 7.67200000e+03
+ -2.00000000e+00 9.49200000e+03
+ -1.50000000e+00 1.15940000e+04
+ -1.00000000e+00 1.33020000e+04
+ -5.00000000e-01 8.31300000e+03
+ 0.00000000e+00 1.27100000e+04
+ 5.00000000e-01 7.98500000e+03
+ 1.00000000e+00 1.05530000e+04
+ 1.50000000e+00 1.09650000e+04
+ 2.00000000e+00 7.77200000e+03
+ 2.50000000e+00 7.23500000e+03
+ 3.00000000e+00 9.37100000e+03
+ 3.50000000e+00 1.03880000e+04
+ 4.00000000e+00 7.47900000e+03
+ 4.50000000e+00 6.95300000e+03
+ 5.00000000e+00 6.12400000e+03
+ 5.50000000e+00 4.63200000e+03
+ 6.00000000e+00 7.51100000e+03
+ 6.50000000e+00 3.03800000e+03
+ 7.00000000e+00 3.59400000e+03
+ 7.50000000e+00 5.45000000e+03
+ 8.00000000e+00 4.11300000e+03
+ 8.50000000e+00 5.16000000e+03
+ 9.00000000e+00 1.89300000e+03
+ 9.50000000e+00 2.76500000e+03
+ 1.00000000e+01 1.36500000e+03
+ 1.05000000e+01 1.59100000e+03
+ 1.10000000e+01 2.10300000e+03
+ 1.15000000e+01 7.68000000e+02
+ 1.20000000e+01 1.51500000e+03
+ 1.25000000e+01 2.07300000e+03
+ 1.30000000e+01 1.45600000e+03
+ 1.35000000e+01 4.34000000e+02
+ 1.40000000e+01 5.51000000e+02
+ 1.45000000e+01 1.95000000e+02
+ 1.50000000e+01 1.76700000e+03
diff --git a/pc/data/20110106/log-locked.gz b/pc/data/20110106/log-locked.gz
new file mode 100644
index 0000000..f39c4e4
Binary files /dev/null and b/pc/data/20110106/log-locked.gz differ
diff --git a/pc/data/20110106/log.gz b/pc/data/20110106/log.gz
new file mode 100644
index 0000000..fd05388
Binary files /dev/null and b/pc/data/20110106/log.gz differ
diff --git a/pc/data/20110106/log2-locked.gz b/pc/data/20110106/log2-locked.gz
new file mode 100644
index 0000000..7d78008
Binary files /dev/null and b/pc/data/20110106/log2-locked.gz differ
diff --git a/pc/data/20110106/log2.gz b/pc/data/20110106/log2.gz
new file mode 100644
index 0000000..0cc561c
Binary files /dev/null and b/pc/data/20110106/log2.gz differ
diff --git a/pc/data/20110106/makehist.m b/pc/data/20110106/makehist.m
new file mode 100644
index 0000000..04fe3c3
--- /dev/null
+++ b/pc/data/20110106/makehist.m
@@ -0,0 +1,29 @@
+# Make a histogram of the error (in milliamps)
+
+#a=load("log-locked");
+#len=size(a,1)
+#keith=a(:,3);
+#calib=a(1,4)
+#dac=a(:,5);
+#adc=a(:,6);
+#lookup=load("../../../firmware/lookup.inc");
+#meas=-(lookup(dac + 1)/64 - calib * adc);
+keith_amps = keith * 50;         # 50 turns
+p = polyfit(meas, keith_amps, 1)
+meas_amps = meas * p(1) + p(2);  # calibration fit
+err_amps = keith_amps - meas_amps;
+
+[n, x] = hist(err_amps*1000, [-15:0.5:15]);
+
+for i = 0:30
+  cumulative(i+1)=sum(n((31-i):(31+i))/len);
+endfor
+figure(1);
+plot(x(31:61),cumulative);
+
+
+savedata = [ x' n' ];
+save("-ascii", "hist.dat", "savedata");
+
+figure(2);
+bar(x,n)
diff --git a/pc/data/20110106/process.txt b/pc/data/20110106/process.txt
new file mode 100644
index 0000000..911efad
--- /dev/null
+++ b/pc/data/20110106/process.txt
@@ -0,0 +1,43 @@
+Some processing thoughts:
+
+zcat log.gz | grep ^1 | tail -n +200000 > log-locked
+
+octave:
+
+  a=load("log-locked");
+  len=size(a,1)
+  t=1:10000;
+  keith=a(:,3);
+  calib=a(1,4)
+  dac=a(:,5);
+  adc=a(:,6);
+  meas=-(dac - calib * adc);
+  plot(keith(t),meas(t))   # should be linear
+
+  p = polyfit(keith, meas, 1)
+  plot(t,keith(t) * p(1) + p(2),t,meas(t))   # should match
+
+  t=1:len;
+  plot(t,keith(t) * p(1) + p(2) - meas(t))   # absolute error (units=dac)
+  axis([0 len -1 1])
+
+Range is something like +- 0.5 over the entire range (of "DAC values")
+This gives log(1024 / 1.0) / log(2) = 10 bits
+No good!
+Now let's convert the DAC values to their more-accurate value using the lookup table
+
+  lookup=load("../../../firmware/lookup.inc");
+  size(lookup)
+  meas=-(lookup(dac + 1)/64 - calib * adc);
+  p = polyfit(keith, meas, 1)
+  t=1:len;
+
+  plot(t,keith(t) * p(1) + p(2) - meas(t))   # absolute error (units=dac)
+  axis([0 len -0.3 0.3])
+
+Now closer to +- 0.05
+This gives log(1024 / 0.1) / log(2) = 13.3 bits
+
+
+
+