Thanks for the replies guys! I fell like I didn't lose too much. I'am gonna try some other chip options. There are a few places where I want to swap out the OPA2134's for LM4562.<http://www.national.com/pf/LM/LM4562.html>The OPA2134s aren't so good for driving low impedance loads. which means lower headroom and increased distortion. the LM4562s will go in the output stage and any noninverting buffer applications. I guess that's where OPA2134's suck.
I'll let you know how it goes when I can find some time to open her up. thanks again. On Sat, Jan 3, 2009 at 7:49 PM, Ike Zimbel <[email protected]> wrote: > Hi Alex, > Can you quantify this a bit? Like how much headroom do you think you > lost? One thing you could try is putting the stock chips back in one at a > time and see when you notice a performance change. I have yet to find one > chip that I will use in every position in a Neotek. > best, > Ike > > The Bubble wrote: > > So recently we did some minor "upgrades" to the master/monitor section of > our Elan 2. Just some ideas I picked up on the board. One of the things I > thought it would do was give us more headroom. but seems like we kinda lost > a little. Heres what we did... > > added burr-browns (OPA134 & OPA2134) to the master/monitor section. Also > WIMA MKP2 0.1uF polypropylene caps to bypass all the electrolytic coupling > caps. also upgraded all 30 or so stock 10uF's. we left those original > non-polar caps in place and soldered a 0.1uF MKP2 polypropylene cap in > parallel with them. > > If anyone has some thoughts on the matter I would love to hear them. > > thanks and happy new year. > > -- > Alex Lyon > www.bubblerecording.com > > > -- > Ike Zimbel > Zimbel Audio Productions Ltd. > Toronto > 416-720-0887 > "Studio House Calls" - Repairs and upgrades to analog audio equipment > including: Amek, Allen & Heath, Neve, Neotek, MCI, Soundcraft and more. > > > ------ You can unsubscribe at anytime by sending an email to mailto: > [email protected] with "unsubscribe neotek" in the message body. If > you have any difficulties, or questions --please send an email to > [email protected]. The Neotek list is lovingly hosted by Catapult Web > Development. Remember that any message or reply sent to the list will be > automatically forwarded to all subscribers. Vive Le Neotek ! Thanks. -- Alex Lyon www.bubblerecording.com
