Classic Audio Products, Inc.Classic Audio Products, Inc.Classic Audio Products, Inc.

~~Holiday Schedule for End of June~~

Hey all, I have family coming in for a visit so will be closing the store for a few days from Sunday evening June 25th thru Sunday morning July 2nd. The 511 rack back panels are in route from screen printing and should arrive Wednesday June 21st. The rest of the rack metal is already here. I hope to get everything posted at the store before I close. I am very low on the 1x12 Grayhills for stepped gain. The next batch is due in July 12th.

Categories
500 Series Rack Kits (31)

Aluminum Control Knobs (23)

Assembled Modules (2)

Attenuators (3)

Capacitors (3)

CAPI Attire (6)

CAPI Nip-N-Tuck Bundles (16)

Connectors (30)

Diodes/Rectifiers (1)

Faders (2)

Floor Box PSU (17)

HiZ Plug-Ins (10)

LED Indication

Meters (1)

Misc Hardware & Bits

Modular Console & Rack Parts (18)

Op Amps (34)

PCB's & Kits (71)

Potentiometers (8)

PSU Items (4)

Relays (6)

Resistors (1)

Ribbon Mic Preamps (2)

Switches (18)

Tools (5)

Transformers (14)

Transistors (4)

Specials
Newest Products
Goto...
What's New? more
BT50-Litz Entire Bundle
BT50-Litz Entire Bundle
$452.49
Information
Shipping & Returns
Privacy Notice
Reviews & Testimonials
Audio & Video Clips
Links
Authorized Builders
DOA Install
Support Documents
About Us
Contact Us
Discrete Opamp Installation Tips & Tricks Discrete Opamp Installation Tips & Tricks

     I have been fielding numerous emails regarding proper discrete opamp installation for my preamps and other modules. I thought I would post a few bits of information to help make this easier for those who do not know. The tips and techniques specified here are only for 2520 style opamps that seat in the Mill-Max sockets that I supply.

     The Mill-Max sockets are very stiff when they are virgin. So stiff that you may get the feeling you will break something if you keep pushing on your open or unpotted DOA. A properly seated DOA is very solid and will typically never come out even when the module is moved/turned around a quite bit.

     A simple way to prep your virgin Mill-Max sockets can be accomplished with a small paperclip and a few minutes of time.

Click to enlarge
Click to enlarge
 
Lets start by locating a small paperclip. The wire of a small paperclip will measure about .034" (.86mm) in diameter. The typical DOA pin is .04" (1mm) in diameter. You definitely want to make sure that the paperclip is a little smaller in diameter than the DOA pin. The tape is not necessary. It only demonstrates the depth the paperclip will travel in the socket. That's about .2" (5mm).
Click to enlarge
Click to enlarge
 
Position your module flat in front of you on a desk or table. DO NOT HAVE A DC POWER SOURCE CONNECTED AT THIS TIME!! Insert the paperclip into each of the six Mill-Max sockets.
Click to enlarge
Click to enlarge
 
You will insert the paperclip until it bottoms out inside the Mill-Max socket. Some significant force may be required. Don't worry. You will not hurt anything. Don't twist or turn the paperclip. Just insert it straight and then pull it out. Again, the paperclip will travel down about .2" (5mm).
Click to enlarge
Click to enlarge
 
Once all of the sockets have been loosened up, it is time to install the discrete opamp. It is important to try your best to push down evenly to prevent bending over the Mill-Max pins on the DOA. Use your fingertips to push on the PCB, NOT ON THE COMPONENTS!!
Click to enlarge
Click to enlarge
 
Continue putting even downward pressure on the DOA unit it will absolutely not go any further.
Click to enlarge
Click to enlarge
 
When the DOA is properly fully seated, you will have approximately 3/16" (4.8mm) between the top of the main PCB and the bottom of the DOA PCB.

     Simple as that! Now, have some fun and enjoy!

Continue
Shopping Cart more
0 items
Curative Notice
Classic Audio Products, Inc. is not affiliated with API. Customers and fans should not refer to Classic Audio Products, Inc. as "Classic API." API is a registered trademark of Automated Processes Incorporated. Classic Audio Products, Inc. has no affiliation with Automated Processes Incorporated.
Bestsellers
01.gar2520 DOA Full Kit Bundle
02.DOA PCB Socket Set
03.gar2520 DOA PCB
04.C&K Black Bullet Switch Cap
05.Toneluck 2PDT Pushbutton Switch
06.C&K White Bullet Switch Cap
07.EA2622 Input Transformer
08.VP28 Entire Bundle
Manufacturers
Quick Find
 
Use keywords to find the product you are looking for.
Advanced Search
Reviews more
VP26 Entire Bundle (Stepped)
For 4 years since my first VP26 (red dot) build it has been ..
5 of 5 Stars!

Copyright © 2017 Classic Audio Products, Inc.
Powered by osCommerce