I bought a Fubar and Big Joe for my new k1000 system and I noticed that compared to my Entech 205.2 with the Big Joe, the bass seems way too light, almost K501 light! I plan on switching the OP amps around. I've just purchased the OPA627, AD827AQ and OPA2107. Is there any other OP amps any of you guys recommend?
You need a brown dog adapter to mount the 627s on. These OP amps are single channel chips, where as the stock 2604 is dual (thus, the 2 in front of the p/n).
I recommend picking up a couple just in case one gets messed up or something.
You'll need to solder the 627s into this adapter with no more than a 25W iron and be mindful of the orientation of the chip into the mounting socket. If you get them backwards, they will certainly fry as well as possibly doing damage to the Fubar. When soldering, do not allow the iron to remain at the solder joint for any longer than 3 seconds at a time. Longer durations will cause permanent damage to the chip. If you don't get it right the first time, let it cool (the chip), and then move on to a different pin. You can come back to it later.
It might sound a little scary at first, but it's actually rather straight forward and good results can be achieved with a little patience.
If you have doubts about your soldering skills, pick up a perf board with copper solder rings from Radioshack and practice soldering .22 gauge solid core wire into the vias (holes).
Good through hole solder joints should look like these:
You had them in your link roker: Two Pre-Mounted OPA627AU Op-amps on 020302 Adapter (p/n OPA627AU-020302S)
2 x OPA627 soldered on a 2 x single to dual browndog. I didn't read the entire thread, but that seems to be what you are looking for (replace a stock dual opamp with single opa627s in a DIP 8 format)?
The part I linked replaces a single dual DIP-8 opamp with a pair of single OPA627s, so it appears to be exactly what he needs. Assuming the opamp form factor in the Fubar is a DIP-8 package.
The OPA627 have been used with great success for audio for a long time and many consider them one of the best audio opamps available. There are others you may also like, look around and ask questions. Opamp rolling gets to be a hobby all by itself before you know it.
Sorry to dig up an old thread... but I'm trying to figure out what sockets are what on the Fubar II. The socket designations on my board are U4 and U6. Can someone tell which is the DC servo and which is the LPF? Thanks for any help!
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.