Agilent E3632A Power Supply Transformer hum

[Hrvoje_CRO]

Hello!

Well, i've purchased for a reasonable price 1 E3632A power supply and i have a little concern. During switching on the unit i can hear transformer hum at startup which is not too loud but it is hearable. So my question is, is this normal on these power supplies or should i be concerned by that? Also, if i block the fan i can hear transformer sound which should be normal.
I wanna hear your opinions on that.

Thank you in advance!

Hrvoje

[HighVoltage]

Hello Hrvoje_CRO

I have two of these E3632A and both have an initial transformer noise, when turned ON.
But after they are ON, there should not be any more noise.
So, I think your E3632A is alright.
 

[Hrvoje_CRO]

Hello HighVoltage!

Thank you so much!
Well if you block the fan you can hear the transformer but that is normal. Arghh, i am obsessive compulsive and i asked this because i've thought there is a problem with my supply. The worst thing for electronic technician is having OCD

Thank you again!

Best Regards,
Hrvoje