Satan's Test Equipment...

[tim123]

Hi folks,
  I've noticed that when I switch on my bench power supply, the readout always starts off with 66.6v on both channels. 

It took a few goes, but I got a photo, attached below.

Does anyone else have test equipment that shows signs of evil tendencies?


Tim

[lumen]

I suggest you buy a small GONG or bell and walk around the room ringing the gong and yelling OUT WITH YOU EVIL and see if the numbers change.

Or just think 999 because someone put something in backwards.

[MileHigh]

It's possible that it's an "Easter egg," you never know.  I read about 1960s minicomputers putting up smiley faces on the blinking lights that show you the registers when certain catastrophic hardware failures happened.   There are tons of them in computer lore.

[magpwr]

Hi folks,
  I've noticed that when I switch on my bench power supply, the readout always starts off with 66.6v on both channels. 

It took a few goes, but I got a photo, attached below.

Does anyone else have test equipment that shows signs of evil tendencies?


Tim

hi tim123,

I wanted to laugh but then i suddenly remember since i like watching paranormal documentary eg:ghost or demon.It's where people go and search for evil presence in a haunted location.
Some groups had some EMF detector to detect it's presence But if it detects demons in the haunted vicinity the EMF will show reading as "6.66".

It's strange these unknown have a uncanny ability to meddle with electronic equipment."With the accuracy of 2 decimal place"

hahaha.Time to take out your bible and watch the reading again.Remember to ask question like if you are a demon.......

Good luck and sleep tight and don't let the bed bugs bite.

hahaha........Oh Dear....

[gyulasun]

Hi folks,
  I've noticed that when I switch on my bench power supply, the readout always starts off with 66.6v on both channels. 

It took a few goes, but I got a photo, attached below.

Does anyone else have test equipment that shows signs of evil tendencies?


Tim

Hi Tim,

I suppose this 66.6V is measurable at the output too, not just shown on the display only?
IF yes, then was it brand new when you got it and back then it started correctly?
A schematic would be good to see if you got such for the PSU but I found a link with some notices on issues  and inside images, so I think this is a normal linear power supply with one-one pass transistor per output channel. It seems that the puffer voltage of 66 V which developes across the biggest (in diameter and height) electrolytic capacitor and the pass transistor (mounted on the heat sink) is somehow able to let it go out to he output (if it is measurable there, that is).   
If you load the supply for say 10-15 minutes continuously (any one channel) normally with a few watts of lamp, resistor, whatever for instance, and then remove the load and check whether the supply starts again with the 66.6 V display (and output voltage).
If yes then some of the smaller electrolytic capacitors mainly in the control circuits (like 100 uF, 220 uF or even 470 uF etc) may have become leaky (or drying out). To check and find this cap would need an ESR capacitor meter, unfortunately.
The fact, that both channels show the same behaviour may mean the problem is in a circuit common to both channels, this would need studying the schematic diagram.
Here is the link with the images:  http://www.rcgroups.com/forums/showthread.php?t=1030827 

rgds, Gyula