Listing of Opamps for EE Minimax DAC Plus

Having lived with the DEXA Discrete op-amps for about 3 weeks now, they really do seem to be the one's to beat. I highly recommend for the tube output the Philips E80CC pinched waist D getter version as a substitute for the 12au7. Although this tubes is twice the length and you won't be able to put the tube shield in place anymore , and being that this isn't a direct substitute for the 12AU7 as it draws twice as much heater current, Alex Yeung the designer says it is ok to use. This tube with the Dexa's is fantastic!

Bill
Can you describe the sound with the Dexa's in, on another site the user said it gave body to instruments, something that may be lacking with stock op amps

Regards
Bruce

I have been enjoying my minimax plus with dual Burson's in U1\U2 and the Dexa's in U6\U7 for a few months now and couldn't be happier. I find the sound to be stunning. Although with some recordings I like the sound of the Burson's with a Amperex orange NOS tube from pearl cryo better. You sacrifice some of the vivid resolution with the tube as well as output level, but you get a nicer, softer sound when listening to harsher recordings. I bought the flying lead version of the Burson's and trimmed them down to about 3\16" and carefully lined them up to the socket holes and wiggled them in. It was a delicate procedure, but they are in firmly now, and they clear the lid. I later thought of a better way of doing it which I'll cut and paste from another forum to save the typing.

for those who wish to roll with the Burson opamps without the hassle of having to buy the flying lead version, and deal with the shady process of trimming and worrying about the leads bending and potentially snapping off. The original reason I didn't go with the much sturdier dip lead version was because of the clearance issues with the lid. I've thought of a solution. All you need to do is buy some sheets of a product such as:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=268-030

to use as a spacer\gasket. Stick it to the inside of the lid (not sure how many layers it will take, could just be 1 but buy 4 they are cheap enough), cut a little square out where the bursons line up with the lid, and also a square where the vent holes for the tube cooling are. You will also need to find some longer machine screws to attach the lid and make some little holes in the material where they need to go through. This method will effectively allow enough clearance for the dip version, plus you will reap the benefits of a sound deadened lid! Why didn't I think of this before?

Can you guys list the p/n's of the Dexa and Burson opmps and sources? Are some of you using single and dual dexa's and single and dual Bursons? nd some of you are using singles of one and duals of the other?

Okay, then I'll list what I bought then from Parts COnnexion!
2 Dexa Discrete Opamp Dual DEXA-73728 $84.95 $169.90
1 BURSON Dual Discrete Op Amp Modules, pair, (DIP Header) BURSON-74454 $179.95 $179.95
2 Dexa Discrete Opamp Single DEXA-73729 $49.95 $99.90
1 BURSON Single Discrete Op Amp Modules, pair, (DIP Header) BURSON-74456 $114.95 $114.95