I Just

St August · Post by **St August** » Thu Dec 06, 2007 12:25 pm

this is the current op amp thats in the ramsa

JSR 4560D 8P DIP Op amp

Post by **VelvetGeorge** » Thu Dec 06, 2007 12:29 pm

Are those on the inputs, line amps and busses?

george

St August · Post by **St August** » Thu Dec 06, 2007 12:33 pm

inputs

St August · Post by **St August** » Thu Dec 06, 2007 12:34 pm

supposedly these console were a direct copy of Neve when it wasnt fashionalble to do so....

Post by **VelvetGeorge** » Thu Dec 06, 2007 12:45 pm

Very cool. Have Steve look at the specs for those JRC chips. Maybe they are cool.

Are you prepared to recap? None of the other mods will see their full potential if your caps are drying up.
Plan on spending $200-300 for good electrolytics. You can't skimp on these.

VG

St August · Post by **St August** » Thu Dec 06, 2007 12:57 pm

Ill have Steve check them out , He mentioned the same thing..

In the manual it says to let the console warm up for a min of 5 minutes before operating..

Post by **VelvetGeorge** » Thu Dec 06, 2007 3:36 pm

Also consider the ridiculously good Burr Brown stuff made by Texas Instruments:

http://focus.ti.com/analog/docs/amplifi ... +hdr_p_amp

You really can't do better for op amps IMO.

Also, here's a post where Dave Derr talks a bit about Ramsa boards:

http://www.gearslutz.com/board/geekslut ... ledge.html

george

St August · Post by **St August** » Thu Dec 06, 2007 4:13 pm

Hmm looks like some parametics might be in order..
Well Ive spent the day pumping audio thru every channel on this thing

No noises at all.. all channels very much alike..

I also noticed that after about an hour of operation the audio becomes very warm an lucid like.. Just what I was hoping for....