I have searched the forums and haven't found anything. I want a 1500va 49 volt secondary transformer with 120 primary. This is for a Wolverine build. What's the best out there?
https://www.antekinc.com/an-15450-1500va-50v-transformer/
50v, but close enough. Can cap off the 12v secondaries or use them for something neat like relays or meters.
50v, but close enough. Can cap off the 12v secondaries or use them for something neat like relays or meters.
No you don't.
You need a 49Vac + 49Vac transformer, not a "49 volt secondary transformer"
Yes, it sort of is. With that supply voltage I would think that 500VA is "normal audiophile overkill" rating and 800VA is way more than necessary for a class AB amp. I doubt going to 1500VA is going to do much except waste money and space. Also, 50VAC is going to be very close to the max. voltage as far as I can see from the schematic, so maybe consider going to 45VAC instead?
You are having difficulty because 1500VA is a silly big transformer.
Toroid Corporation of Maryland makes great transformers up to 1000VA. https://toroid.com/power-supply-transformers-toroidal
Ed
Toroid Corporation of Maryland makes great transformers up to 1000VA. https://toroid.com/power-supply-transformers-toroidal
Ed
I am glad for the education. I thought going oversize would give the amplifier slightly more headroom because the power supply won't sag. Is this not true? I am learning this on diy projects so all the advice is definitely appreciated.
Thank you I will start to use the correct terms. So that should give me around 70 volts dc ?
Original project in its power supply section suggests picking a lower voltage PT (45+45Vac?) If overspec 'd "because it will sag less"
Straight from the horse's mouth 😄
The 2x 42V, 1000VA model should work. The 2x 38V, 820 VA model should also work. These are large transformers.
Ed
Ed
I was going by the build guide. I saw a 1200va 50 volt ac transformer. That would be 71 volts dc at the rails? Recommended for oversized. 430watts @ 4 ohms. This is where I obtained my information. I also see manufacturers of amplifiers like Parasound have large va and capacitance for their power supply. Is this just a sales gimmick?
No. They use the transformers that give the sound they want. In the case of Pass Labs HPA-1 it was reported by them that they went through six prototype power transformers before they got to a version they liked. According to people who know, it does have an effect on the sound of that particular circuit.
Other amplifier circuits may be different though, so its not always better to randomly throw in oversized transformers just because someone else did. Also, even if a little bit oversized can be good in some cases, going too far with oversizing can sound worse.