Cool, thanks for writing back!number9 said:I have seen several reasons for this... the main ones are:
Bad ground, or a ground that is faulty or not having a very good connection, really
check around the filter caps.
Bad filter cap, this is kind of rare (not the bad cap, the bad cap making that sound)
Bad power switch (I see this a lot more than I would like to... geez, is a good switch that much more?)
Bad wiring to the first cap... check all of those solder joints!
Arcing somewhere from inrush current... I have sometimes seen these elusive
"wire was slightly crimped/cut/whatever here, and now it starts to pop when cut on"
Most of the time I find the problem is a ground, or the switch.
Hope that helps some.
Have your amp tech (or if you DIY) add a .02 @ 600 V cap across the switch terminals. It makes a nice suppressor for sparks and arcs that make noise and kill switches prematurely.jezzzz2003 said:Cool, thanks for writing back!
I also would like to know if any of theser symptoms can hurt my amplifier?
Hey I just saw this old post of yours about adding a .02pf? 600v cap across lugs of the power switch on amps that crackle and pop when starting up.Have your amp tech (or if you DIY) add a .02 @ 600 V cap across the switch terminals. It makes a nice suppressor for sparks and arcs that make noise and kill switches prematurely.
Many, if not all, of these standby switches are rated for a lower voltage and a higher current (old Fender's are really bad culprits for switch under-rating) and the caps make them survive the arc better when used at DC. I guess the Engineer's figured higher voltage and lower current would be okay...
Yeah I wondered about tube sockets as if the connects completes better once the amp@Matt117 since it makes noise that long after the switch is thrown I'm wondering if it's something else? I'd probably hook a volt meter up to the "off" side of the switch and see if there's any fluctuation there, before swapping it out. Could be something else that's unstable till it warms up a little.