I know this is an aging amplifier but any help would be appreciated.
I have acquired a used Parasound HCA-2200 Original Version. I am going to recap it soon. My question comes in regards to the OP Amp. I have read countless articles where John Curl and others say to either bypass the IC with a shielded RCA or to replace the OP Amp AD712 with AD825.
https://www.audioasylum.com/cgi/t.mpl?f=tweaks&m=56113
This is the best resource I could find on the LC Audio AD825 Type 1
https://www.octave-electronics.com/lcaudio/ad825.shtml
The website of course is overseas and I don't believe I can order from them.
I found this site for single to dual op amp adapter.
https://www.cimarrontechnology.com/product/browndog-020302-single-to-dual-op-amp-adapter
I have attached the original HCA-2200 schematic along with the Cimarron Adapters Schematic.
Can anyone verify that the Cimarron Adapter will replace the HCA-2200 AD712 op amp?
Anyone want to chime in on experience with these amps?
I plan on replacing all electrolytic caps. (Board and main)
I am going to change the resisters at R125 (R225) to Holco H4 https://www.diyaudio.com/community/threads/holco-h4-resistor-old-vs-new-how-to-identify.381120/
Per previous recommendations, I will remove the film caps on the main caps that are wired together.
Anyone recommend replacing rectifiers or resistors? Film caps?
I have acquired a used Parasound HCA-2200 Original Version. I am going to recap it soon. My question comes in regards to the OP Amp. I have read countless articles where John Curl and others say to either bypass the IC with a shielded RCA or to replace the OP Amp AD712 with AD825.
https://www.audioasylum.com/cgi/t.mpl?f=tweaks&m=56113
This is the best resource I could find on the LC Audio AD825 Type 1
https://www.octave-electronics.com/lcaudio/ad825.shtml
The website of course is overseas and I don't believe I can order from them.
I found this site for single to dual op amp adapter.
https://www.cimarrontechnology.com/product/browndog-020302-single-to-dual-op-amp-adapter
I have attached the original HCA-2200 schematic along with the Cimarron Adapters Schematic.
Can anyone verify that the Cimarron Adapter will replace the HCA-2200 AD712 op amp?
Anyone want to chime in on experience with these amps?
I plan on replacing all electrolytic caps. (Board and main)
I am going to change the resisters at R125 (R225) to Holco H4 https://www.diyaudio.com/community/threads/holco-h4-resistor-old-vs-new-how-to-identify.381120/
Per previous recommendations, I will remove the film caps on the main caps that are wired together.
Anyone recommend replacing rectifiers or resistors? Film caps?
