The CA-0252 is CAPI's take on the vintage API 2520 opamp, and is unique from the other 2520's that are available.
CAPI has been as faithful as possible to the exact type of parts used in the early 1970's API 2520s. CAPI based this design on some rare unpotted vintage 2520 opamps This allowed them to precisely decipher the exact components and circuit used, which turned out to be different than the commonly accepted circuit and parts that are used in most current 2520 designs. CAPI even had some obsolete parts remade to match the originals exactly.
The CA-0252 uses longer terminal pins so there is no issue in an API 2500 etc that may have other components under the opamp footprint. These longer pins impose no issues when used in a situation with no components under the amp. Just leave them long. If you have an old school situation where the amps are soldered directly to the PCB, just solder them in and cut the pins off.
Some of the applications the CA-0252-DIY DOA can be used for: Microphone Preamplifiers Line or Booster Amplifiers Lossless Combining Amplifiers Balanced Transformerless Amplifiers Equalizers and Compressors
Additional features and specs: Industry standard 2520 footprint for plug-in or PC mount connections Low noise, high power output Low distortion Minimum load impedance is 75 ohms for full output voltage Power supply voltage is bi-polar +/- 12 VDC to +/- 20 VDC Includes all top quality parts and components