I've got a stack of Harman Kardon 330A, 330B and 330C and they all have a BA1310 IC chip in a DIP-14 14 pin package that handles the FM signal demultiplexing. Pin #6 drives the stereo indicator lamp, too, apparently. One of these units wasn't lighting that lamp correctly and I swapped the BA1310 chip out of the 330C for a BA1310 chip from a 330B and got it working properly.
Checking around AK and eBay (my 2nd favorite research site) and the web, it looks like that BA1310 chip is the same, or at least functionally equivalent, to several other chips. I found references to
BA1310
LM1310
NTE 801
ECG801
and more. Somewhere here on AK also made is sound like the HA1156W (did I get that right?) from the Pioneers would also work.
Does anyone have a clear list of which chips are the same as the BA1310? How about functionally equivalent to the BA1310?

Checking around AK and eBay (my 2nd favorite research site) and the web, it looks like that BA1310 chip is the same, or at least functionally equivalent, to several other chips. I found references to
BA1310
LM1310
NTE 801
ECG801
and more. Somewhere here on AK also made is sound like the HA1156W (did I get that right?) from the Pioneers would also work.
Does anyone have a clear list of which chips are the same as the BA1310? How about functionally equivalent to the BA1310?
