Power transformer question.

[mcasey1]

I am building a dual-channel stereo headphone amp for me and my friend to record with.  The specific project I am building is this:http://www.amb.org/audio/ck2/

I ordered a transformer, the spec'd Amveco TE62033 15V+15V.  If I were to put two circuit boards in the same case, would I just use a single transformer and connect both the same way using a terminal strip or something like that to run two leads to each board for each power transformer wire?  This kind of stuff is new to me, so even a simple question such as this I have no idea how to figure out.  Specifically I am wondering if just one transformer will power both boards.

Thanks,

Matt

[petemoore]

I ordered a transformer, the spec'd Amveco TE62033 15V+15V.
   
  If I were to put two circuit boards in the same case, would I just use a single transformer and connect both the same way using a terminal strip or something
  Unknown at this time, start off with a verified layout, or at least a schematic for communication optimization.
  For sure it depends on the circuits current draw/transformers ability to provide it, ~depends on whether you want clean audio ___-ing or ____ication.
  like that to run two leads to each board for each power transformer wire?  This kind of stuff is new to me, so even a simple question such as this I have no idea how to figure out.  Specifically I am wondering if just one transformer will power both boards.
  We need more info.

[head_spaz]

It appears that your project has it's own powersupply built-in, so you should be ok with the one transformer supplying AC for both boards.
However that transformer is only rated for 7va.
If you plan to drive two sets of stereo headphones simultaneously, you might wanna up that spec a bit, depending on the impedance of the headphones you plan to use.
For high fidelity projects like this, I like a stiff power supply. So I would play it safe and go with the TE62053 instead. It's rated 15va, and since each board appears to provide it's own power regulation, it should offer enough isolation to prevent intermodulation between the channels, providing the transformer can supply enough current.
But if you've already acquired the TE62033, it should still work, but you might notice a loss in dynamics, especially in the bass.
Or you could use two TE62053's, one for each amp, but that's not very cost effective.
All things considered, I'd go with the TE62053, enjoying the satisfaction of knowing for sure that it's up to the task.
Those Amveco transformers are really good quality. Unfortunately, Digikey seems to be out of stock at the moment.
Good luck with your project.

[mcasey1]

Yeah I don't see anywhere that it is available.  I will probably have to call a representative and order it.  I was thinking I would just connect the leads coming off the transformer going to the power supply section of the boards to a small terminal strip and using each junction to turn one lead into two.  I'll take care to heatshrink wrap all exposed metal and I'll have to make sure that the terminal points aren't touching the metal case but I guess this would work.  I'll have to read up on transformers.  I just don't know which is suitable/less than suitable/unusable for any given task.  Thanks for the help!

Matt

[head_spaz]

I just noticed that Digikey does stock the TE62054-ND and sells them for $30.
This would work just as well, if not better, for what you're trying to accomplish.
The only difference is it's 18v +18v, but your powersupply is fully regulated so
it shouldn't pose any problems whatsoever.

[mcasey1]

Wow!  Thanks a lot!  I'll get right on it.

Matt