dual purpose Toroidal for LM3875/LM3886

[JonGain]

Avel Y236750 330VA 25V+25V Toroidal Transformer 122-640



Any problems going this route for a PSU that I can use with both chips?

Thanks........

 

[Mihkus]

What the **** is dat price!?
WHAT THE **** for real dude...
I bought 2 300VA transformers for that price and they had shielding+fastening
toroidy.pl

Laughed my *** off when i saw the price.
Seems fine to run LM3886 at 8 ohms same with 75 really.

 

[JonGain]

I wonder if I would laugh my *** off when I saw the shipping and amount of time it would take for those to get to me :/

 

[JMFahey]

Avel Y236750 330VA 25V+25V Toroidal Transformer 122-640



Any problems going this route for a PSU that I can use with both chips?

Thanks........

That transformer is more than enough to power 2 LM3886 chip amps.

 

[ChristianThomas]

Like Mr Fahey says, more than enough. Look up prices at Farnell or Element 14 before you go and buy. You may also get free shipping since you'll likely spend over $50. There's nothing wrong with the trannys they sell, though you may have a reason for choosing this one (or others here may).

 

[JonGain]

I am now looking at the Antek's their prices seem to be more reasonable, so much so that I may go the true dual mono way. I'm looking at the 300VA 22v, thoughts?

 

[JMFahey]

22V or 22+22V?

 

[sreten]

Hi,

Using overkill on mains transformers for chip amps with
agressive output protection is a complete waste of time.

In reality you will be fine using (a) transformer(s) with
VA's similar to nominal power output to double that.

rgds, sreten.

 

[ChristianThomas]

Choose your voltage based on the impedance the amp is likely to see (and perhaps on the size of the heatsink you plan to use. 25V will be fine and cover most bases. You could go a little higher before you begin to make life difficult for yourself. 22V will cover even the hardest loads.

I would go for a couple of 160VA transformers at 25V or 27V, with two bridges, if you really want to go the monoblock route, or one at 220VA (though a single 160 will be adequate and leave your options open). Anyone else have a view on this?

 

[JonGain]

I appreciate the conversation and advice..... so I am open to & embrace all discussion....especially if it saves me $$$

So with that said I don't mind cranking tunes in fact I like it.....the main speaker's that will be used are 6-8ohm two ways. the amps are Peter Daniels premium kit and a P2P LM3886 I would guess the audiosector amps will be used more but I would like to use the PS for other projects......so if going the true dual mono way 160VA is fine? and what is the better voltage 22v or higher?

 

[AndrewT]

I think Peter recommends 300VA for his kits.