--- a/content/TeK2445_3.rst Wed Oct 16 21:52:38 2019 +0200 +++ b/content/TeK2445_3.rst Wed Oct 16 21:53:47 2019 +0200 @@ -10,7 +10,7 @@ After having mostly `destroyed the PSU of my Tek 2445 -<{filename}/TeK2445_2.rst>`_, I've decided to be a bit less foolhardy +<{static}/TeK2445_2.rst>`_, I've decided to be a bit less foolhardy and I've subscribed to the `yahoo Tek group`_. I discovered that such a failure has already been reported there, also after a full recap of the preregulator and regulator of the power supply. @@ -23,12 +23,12 @@ resistor and I wrapped some 34 gauge wire around. The result is a bit cleaner, from: -.. image:: {filename}/images/tek2445/lr1060.jpg +.. image:: {static}/images/tek2445/lr1060.jpg :alt: first attempt of a hand made LR1060 chocke. to: -.. image:: {filename}/images/tek2445/lr1060_v2.jpg +.. image:: {static}/images/tek2445/lr1060_v2.jpg :alt: a better hand made LR1060 chocke. @@ -50,7 +50,7 @@ This transformer is a small input transformer with 4 coils around a common ferrite core: -.. image:: {filename}/images/tek2445/tr1050.jpg +.. image:: {static}/images/tek2445/tr1050.jpg :alt: The T1050 input transformer. I was not sure of the specifications of each coil, since mine as (at @@ -82,18 +82,18 @@ I've also quickly checked the voltage ratios using a 42kHz signal: -.. image:: {filename}/images/tek2445/tr1050_ratio_measurement.jpg +.. image:: {static}/images/tek2445/tr1050_ratio_measurement.jpg :alt: Measuring the turn-ratios of the T1050 transformer. I use CH2 of my scope to probe the signal produced by the `HP890A4 -<{filename}/hp8904a.rst>`_ linked to pins 1 and 2 (thus a primary +<{static}/hp8904a.rst>`_ linked to pins 1 and 2 (thus a primary winding), and CH1 on a secondary winding (pins 6-7), which resulted in: -.. image:: {filename}/images/tek2445/DS1Z_QuickPrint17.png +.. image:: {static}/images/tek2445/DS1Z_QuickPrint17.png :alt: Measuring the turn-ratios of the T1050 transformer. -.. image:: {filename}/images/tek2445/DS1Z_QuickPrint18.png +.. image:: {static}/images/tek2445/DS1Z_QuickPrint18.png :alt: Measuring the turn-ratios of the T1050 transformer. As one can see, the turn ratio seems to be 10. Both the 2 secondary @@ -118,12 +118,12 @@ The test load consist in: -.. image:: {filename}/images/tek2445/psu_test_load.png +.. image:: {static}/images/tek2445/psu_test_load.png :alt: Primary Test Load. So I built one and connected it: -.. image:: {filename}/images/tek2445/psu_with_test_load.jpg +.. image:: {static}/images/tek2445/psu_with_test_load.jpg :alt: The PSU with the test load in place of T1060. Was a little anxious when I switch the PSU on, but it did not @@ -136,7 +136,7 @@ reinstalled the PSU in the scope, and gave it a try: -.. image:: {filename}/images/tek2445/back_from_the_death.jpg +.. image:: {static}/images/tek2445/back_from_the_death.jpg :alt: It's alive! At last! @@ -184,7 +184,7 @@ For the fun: -.. image:: {filename}/images/tek2445/side_by_side.jpg +.. image:: {static}/images/tek2445/side_by_side.jpg :alt: Side-by-side: DS1054Z vs. Tek2445 Despite the fact the Rigol DS1054Z has an incredible number of @@ -193,7 +193,7 @@ directly accessible. And yet, I don't think the Rigol can measure both the rise and fall time (with a decent precision) of a square wave: -.. image:: {filename}/images/tek2445/rise_and_fall.jpg +.. image:: {static}/images/tek2445/rise_and_fall.jpg :alt: Side-by-side: DS1054Z vs. Tek2445 Beautiful double time-base!