2. amps-preamps
  3. 147310-11413

Power Amp transformer hum - intermittent and increases and decreases in a few seconds

Checking to see if anyone can tell me if blue circle power pillow or emotive cmx-2 can solve my hum issue. Or is there something else I should be liking at?
john_simp
john_simp OP
24 posts
 
Thx Tom!
tomcarr
1,522 posts
 
You are very welcome! That's what this site is for. Lot's of great people on here! I've been helped many times in the past and am grateful for that and for the chance to help others if I can. 

Tom
mrdecibel
3,064 posts
 
FYI, One of my many power amps, a Smart Theater Systems TA 242 ( which is actually a beefed up Hafler 220 by design, and very musical ), experiences the transformer hum ( toroidal, chassis only ), when I use my OTR microwave. Have not tried a cheater plug during these times, as it is always in rotation with others. Enjoy ! MrD.
don_c55
1,025 posts
 
Some {not all} toroidal transformers can buzz when DC is present on the power line.

My Son of Ampzilla 2000 has a faint buzz when my Canon printer turns on, and when my Keurig brews a cup of coffee.

Otherwise it is dead silent.

My Pass Labs XA60.5 never buzzes and it has Toroids.


jea48
4,446 posts
 
don_c55826 posts

03-11-2019 4:16pm

My Pass Labs XA60.5 never buzzes and it has Toroids.

Just a guess because Pass Labs incorporates a DC blocker in their power amps.



Bryston does......
https://www.diyaudio.com/forums/power-supplies/161428-variations-dc-main-filter-buzzing-toroid-trans...




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