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Safe_Cracker 1st January 2006 04:06 PM

Newbie needs help finding part
I am ordering parts for my PG X1200.1 mono amp. I have found 3 out of four parts needed (Fairchild part #s IRFP360LC, FQP65N06) now I am stuck on a 16 pin IC (bare with me) if that is what it is called with a part number of 13700 A40058 JRC. The first number is on top followed by the second. Any help finding the manufacture, proper name and/or where I can get it. Thanks in advance, Polo..:)

Eva 1st January 2006 04:25 PM

I'm almost sure that it's LM13700 ("dual transconductance amplifier")

This IC allows to implement remote volume and filter controls for the sub at a very low cost.

Safe_Cracker 1st January 2006 04:29 PM

I was just trying to be sure, it is on the input control board think that is what it is called with the subsonic filter, gain, LPF plus bass boost. I was just trying to keep as original or find info on the original piece enough to crossreference a new one. :)

Eva 1st January 2006 05:41 PM

You can be sure that the original part is LM13700 from National Semiconductor, the IC was actually created by that company. The part that you have seen in your amplifier is probably a lower cost clone from JRC (Japan Radio Co.), hence it has the part number slightly modified by removing the LM prefix (that identifies National Semiconductor parts). Don't hesitate to replace it by the original LM13700, since you will have a very hard time finding the JRC clone in your country.

Try googling for LM13700, you will find the website of the company and the datasheet (while JRC probably hasn't even an online catalog entry nor an online datasheet for that IC). You can check the datasheet against the actual circuit to further confirm the model of the IC.

Safe_Cracker 1st January 2006 05:49 PM

I found JRC, it is actually NJR, go figure.. Thankyou guys for the help, this stuff is starting to get exciting, lol. Polo.


Safe_Cracker 1st January 2006 05:57 PM

Ya, it's New Japan Radio Co maybe better qualty? On Mouser's site they say they are high quality, just happy to put the original back in as the amp worked great. Thanks again guys...Polo;)

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