Good morning, Everyone!
I haven't checked in as often as Iād like, but Iāve been keeping up with most of whatās been posted.
Iāve been keeping myself busy, not Willie or Karl level busy, but busy for me.
My mini transformer buying binge sent me off exporing the wonderful world of AC transformers.
I set up a workstation to test and evaluate my expanding transformer collection, using an oscilloscope, multimeter, various analog accessories, and passenger cars with incandescent lamps as loads. It has been a fun learning experience for me.
I focused on analog accessories, and passenger cars with incandescent lamps because my TVS diodes for the ZW haven't arrived yet.
I canāt put into words the wonder and satisfaction I felt when I first powered up the ZW and heard that gentle hum that quickly faded away, that was the transformer doing exactly what a healthy postwar unit should do.
That brief hum comes from the laminations and coil coming to life as the magnetic field stabilizes. Itās the same sound these units made when they were fresh off the line in the late ā40s through the ā60s.
It told me:
- the coil is solid
- the varnish is intact
- the laminations are tight
- the transformer is taking power normally
The nearly instant silence equals a healthy post-war transformer
A ZW that goes quiet right after energizing is a ZW with:
- no loose laminations
- no buzzing panels
- no internal arcing
- no carbon tracking
- no roller chatter
- no vibration from a stressed coil
Silence after the initial hum is the hallmark of a post-war transformer thatās been properly serviced and is in excellent health. the difference between a tired, 60 to 70āyearāold transformer and a transformer thatās been fully refurbished and is operating exactly as designed. That tiny moment: hum, then silence is the āheartbeatā of a healthy ZW. It was just what I was hoping to hear!
After that, I shifted my new obsession to learning more about the ZW.
If I haven't already bored, I posted a thread about the ZW.
I also wrote a more detailed article that I shared on my website.
Enjoy your day Everyone!