Author |
Message |
Sean Borton (codamedia)
Username: codamedia
Registered: 03-2014
| Posted on Tuesday, March 18, 2014 - 01:45 pm: | |
This is on a 212 Sixty Five Chassis #2475-65 SS Phase Inverter. (from 1979) I suspect I have a failing IC at the start of the normal channel (IC1). When I turn up the volume (on the normal channel) with nothing plugged in, I can hear some interference, yet when I turn up the Reverb / Vibrato channel - it is very quiet. After reading a few other posts, it was suggested to move IC5 (reverb driver) to the IC1 position. How do you remove these IC's on the 2475-65? They are the circular LM307H but appear to be on a riser or socket... Do they pull out like the later models with standard looking chips - or do I have to unsolder them from the bottom? |
Mike Kaus (mm210)
Username: mm210
Registered: 05-2006
| Posted on Tuesday, March 18, 2014 - 02:56 pm: | |
They are in sockets. Pull gently. If they break, you will have a hell of a time finding replacements. Most people are using brown dog adapters and using contemporary 8 pin IC's with the socket adapters. Make SURE you orient yourself with HOW they go in the sockets(direction) Mike |
Sean (codamedia)
Username: codamedia
Registered: 03-2014
| Posted on Tuesday, March 18, 2014 - 03:45 pm: | |
Thanks for the info Mike.. I thought they were in a socket but didn't want to tug too hard until I new for sure... Out of curiosity, are those TO-99 sockets? |
Mike Kaus (mm210)
Username: mm210
Registered: 05-2006
| Posted on Wednesday, March 19, 2014 - 09:17 am: | |
Yes. |