Difference between revisions of "Octopus Tester"

Revision as of 18:24, 5 September 2021

Classic Octopus Tester
- Based on design example (N5BL)
Out of circuit component tester
- Useful for matching parts like diodes
In circuit component tester
- Test 2 units and compare signatures on scope
Use 6.3V "filament" transformer
- 8.91V - Vpeak
- 17.82V - Vpeak-peak
- Typical transformer
  - 1.38 in L, 2.38 in W, 1.38 in H
1mA, 10mA "scale" switch
- Pot adjustments to set current (accommodate transformer and line voltage variances)
2 BNC jacks
Plus, Minus Banana jacks
AC powered
- C13 jack with switch
- 1A Fuse
Build into Bud Box CU-1945
- 6.21 in W x 3.76 in D x 2 in H
- Comes with screws and rubber feet

Adjust RV1/RV2 for total resistance (fixed resistor plus pot)
- 891 - 1 mA switch setting (RV2)
- 8910 - 10mA switch setting (RV1)

@@ Line 7: / Line 7: @@
 * Classic Octopus Tester
 ** Based on [http://n5bl.org/pipermail/builders_n5bl.org/attachments/20150514/6b8107e1/attachment-0001.pdf design example (N5BL)]
-* Scope set to X-Y for voltage-vs-current measurement of part
-** Look at scope pattern for device signature
-** Shows voltage/current phase relationships
 * Out of circuit component tester
 ** Useful for matching parts like diodes
@@ Line 22: / Line 19: @@
 ** Pot adjustments to set current (accommodate transformer and line voltage variances)
 * 2 BNC jacks
-** Timebase = XY
-** 50 mS timebase
-** Connect to XY on scope (X=CH1, Y=CH2)
-** CH2 gets set to INVERT
 * Plus, Minus Banana jacks
 * AC powered
@@ Line 33: / Line 26: @@
 ** 6.21 in W x 3.76 in D x 2 in H
 ** Comes with screws and rubber feet
+=== Scope Setup ===
+* Scope set to X-Y for voltage-vs-current measurement of part
+** Press button above time adjustment knob
+** Time Base XY
+** Look at scope pattern for device signature
+** Shows voltage/current phase relationships
+** 50 mS timebase
+** Connect to XY on scope (X=CH1, Y=CH2)
+** CH2 gets set to INVERT
 == X-Y Patterns ==