Usually AC switch noise is suppressed by some capacitance across the
AC line(s) and across the switch. You would want ac line rated
capacitors on the order of .1uF
AC line(s) and across the switch. You would want ac line rated
capacitors on the order of .1uF
At my end of musical session i always shut down first my amp after preamplifier and at the end audio source. Non pop this way 🙂
Ah ok i understand better now that was my initial question.
Btw i see in one recently restored vintage amp two non polarised
AC 250 V ceramics caps around the switch as well.
Attachments
3,3 nF is small capacitor but if non polarised and voltage OK
maybe you can just try solder them and hear if pop is gone.
If not find adequate 0.1 uF leater.
Edit : i remember in the past i find switch contact or push botton who was oxyded and make noise but i clean that with special spray electronic contact cleaner and was back quiet. Find new equivalent part is the great solution non doubt
Greetings 🙂
Was checking the VPI forums and it seems quite o few people have had the same problem with their turntables. Apparently VPI will send me the proper part if I contact the right person there.
Alright, I'm done clogging up this thread with my turntable issue.
BTW this M2 is a beautiful sounding amplifier. Wonderfull midrange with a slightly softer high end, but still very detailed. I thought I might loose some bass but I really haven't noticed that. Pretty much as described by others. For me it works especially good with pop/rock music some of which is recorded a little hot. On well recorded music I do miss the little bit of sparkle on the high end the F4 has with my system. Good thing I have both...except for the fact that the F4 is on loan with my brother.
I replaced the 1000pf cap that was there with the 3300pf I had...quiet as a church mouse!
Hahaha
keep mouse far away from the cats !Other cool thing you can do is install snubber resistor and caps.
See empty dedicated places in your universal psu pcb's.
You need test individualy your toroid with Quasimodo jig.
That give you finnaly very nice for the music psu low noise floor.
M2 want this snubber stuff
See in this Mark Johnson helpful fantastic thread :
Simple, no-math transformer snubber using Quasimodo test-jig
Cheapo modo version if you ready have some of the components on work bench.
Have a nice sunday
Bigger transformer
My M2 sounds amazing with the Cornwall III. First I had a ground noise but a new transformer an new cables made it silent. Since my transformer is 300VA, do a bigger, say 500VA, change the sound in any way?
My M2 sounds amazing with the Cornwall III. First I had a ground noise but a new transformer an new cables made it silent. Since my transformer is 300VA, do a bigger, say 500VA, change the sound in any way?
Yes, I have a Quasimodo. I haven't installed snubbers on the M2 yet but I plan to!
Attachments
@ KevinHeem
What happen with music if you don't use Jensen JT-11P-1 at RCA inputs ??
