Jump to content

opl3 with +/-5V


dreuf

Recommended Posts

Hi.

I may be way out of line here, but from my experience, opamps such as the TL074 work much better with higher supply rails.

You can absolutely use +/-5V rails, but be aware the noise and distortion figures may be compromised.

Good luck!

Matt

Link to comment
Share on other sites

On a related note, anyone knows of a _small_  =+12/center/-12 transfo with enough amperage to drive the three opamp, that

would FIT inside a 1U rack???  Ive got two of them from different manufacturers, but they are way too big (one is 2A and the other 1A)

Cheers

Link to comment
Share on other sites

I was lazy (read as: sick of perfboarding), so I picked up this kit: http://www.rpelectronics.com/English/Content/Items/CK342.asp

And the recommended transformer:

http://www.rpelectronics.com/English/Content/Items/640-1803.asp

IIRC it's short enough to fit in a 1U rack, but I would have to go home and measure it to make sure (it's sitting in a drawer right now, waiting for me to have more free time).  This is only going to be enough juice to handle the +/-12V easily, but possibly not the +5V if you're using a backlit LCD.  And as always, remember to use fuses, etc.

Link to comment
Share on other sites

I was lazy (read as: sick of perfboarding), so I picked up this kit: http://www.rpelectronics.com/English/Content/Items/CK342.asp

And the recommended transformer:

http://www.rpelectronics.com/English/Content/Items/640-1803.asp

IIRC it's short enough to fit in a 1U rack, but I would have to go home and measure it to make sure (it's sitting in a drawer right now, waiting for me to have more free time).  This is only going to be enough juice to handle the +/-12V easily, but possibly not the +5V if you're using a backlit LCD.  And as always, remember to use fuses, etc.

Wow, if i had known, i would have bought this pre made kit too!

Id be currious on the dimensions of the transformator, ill wait for the results.

Im using a separate transfo for the normal MB operations.

Link to comment
Share on other sites

IIRC it's short enough to fit in a 1U rack, but I would have to go home and measure it to make sure (it's sitting in a drawer right now, waiting for me to have more free time).  This is only going to be enough juice to handle the +/-12V easily, but possibly not the +5V if you're using a backlit LCD.  And as always, remember to use fuses, etc.

Well, it's a pleasantly small transformer, smaller than I remembered.  36mm tall, that is about 1.4" high, which should still give you enough clearance to put it into a 1U rack case.

Link to comment
Share on other sites

Well, it's a pleasantly small transformer, smaller than I remembered.  36mm tall, that is about 1.4" high, which should still give you enough clearance to put it into a 1U rack case.

What about the 12VCT / 300mA Transformer from that same dealer:

http://www.rpelectronics.com/English/Content/Items/640-1203.asp

12VCT should be enough to drive a 7912 and a 7812? and wouldn't generate as much heat as the

18VCT.. in any case ill order both of them and report.

Thanks again for the dimensions!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...