Thank you to the both of you,
Feeling a little embarrassed, looking at it a bit harder, it is a SMPS. I have a bigger one (24v/5A) just like this, same manufacturer the I was thinking of using it for the band amp but I'll think it and the smaller ones (above) will instead these will be used as remote located PS for some LED lighting projects I'm doing.
Based on the the tear sheet that techtool provided (thank you), the ripple is 350 mV peak-to-peak @ 70% load. Again, I'll now just use those for LED under cabinet lighting strip projects in my shop.
I also have several Acopian linear PS's (Series A, gold) 24V with a .25 mV RMS Ripple spec (USA made) and one or two 12v gold versions laying around but they take up a lot more space for the given output compared to a SMPS, especially the 24V/5A version, it's pretty big (4"x 5"x 14") for a ACA and also not sure how much improvement in SQ there would be with these Acopians LPS and the Class A Amp Camp Amp working together?
PS: Apologies on my typo's, I wish we were able have more edit time to go back and edit/fix typo's in our posts.
I also have several Acopian linear PS's (Series A, gold) 24V with a .25 mV RMS Ripple spec (USA made) and one or two 12v gold versions laying around but they take up a lot more space for the given output compared to a SMPS, especially the 24V/5A version, it's pretty big (4"x 5"x 14") for a ACA and also not sure how much improvement in SQ there would be with these Acopians LPS and the Class A Amp Camp Amp working together?
PS: Apologies on my typo's, I wish we were able have more edit time to go back and edit/fix typo's in our posts.
Last edited:
Can anything go wrong if I make the cutoff frekvensy at 30khz just to be shure?
Whats best tu use a LC or a RC filter.
Ive got a frekvensy country on my scope and it stod mostt och the time at about 55khz.
Whats best tu use a LC or a RC filter.
Ive got a frekvensy country on my scope and it stod mostt och the time at about 55khz.
So I have a crate V33 amp that the power supply has gone out on. I cannot get a replacement, they are not available. I was told to just buy another amp. I would like to fix this one if I knew how? any guru's out there with wisdom to get this done? attached are all schematics.
Any filter will be helpful, but you will want to recognize that there are components in the audio band as well. Most of the time you will see line frequency and its harmonics as well as nonlinear response to AC current draw. In the end a big capacitor is often involved, but some care has to be taken that the switcher will manage charge it when the amp is turned on.
That's a tightly controlled soft-start power supply... it reminds me of a positive feedback PID, where the amount of feedback is slowly increased to ensure the slow increase of the plate voltage. It was strictly purpose-built for that particular amp. I do not believe you'll be able to retrofit a replacement that is not like-for-like.
I'd definitely be looking at fixing the original power supply. All components are available; the substitutes will work equally well. The only issue could be if the T101's burnt out, which is very unlikely.
Thanks Extreme, any thoughts on where to start, trouble shooting or testing would greatly appreciated.
I'd take it to an electronics repair shop. Any sensible electronics technician should be able to repair it.
A sensible repair person would weigh cost of repair vs replacement. With SWMPS replacement is probably less.
I’ve been using smps with my class A amps now for a couple of years and not had any reliability problems yet. I was looking at ways to improve my power supplies when I came across the AmyAlice DC filter max 3A max 48v. Would it be worth using 4 of these (one on each rail on each channel) for a cleaner power supply?
