μpc1342V driver ic

[sakis]

or it could be called upc 1342 V

come across one marantz that uses this ic

here is a link with the datasheet ....i presume that this ic will be obsolete or hard to find
beyond the repair i have to do i see it as a very inetersting circuit to play with .... anybody come across it ????

regards sakis
UPC1342V pdf, UPC1342V description, UPC1342V datasheets, UPC1342V view ::: ALLDATASHEET :::

[sakis]

anyone????

[jaycee]

Yes, my Marantz PM-35 uses it with a pair of 2SC3180/2SA1263 per channel. I think they were commonly used on the low-mid end range of Marantz amps during that time

The modern equivalent of such a chip would be National's LME49810.

[sakis]

do you have any expireince regarding performance duarability quality and others ???

i will be very happy to know
thanks jay cee

[jaycee]

Sadly not... my PM-35 amp works pretty well though with 30mA bias through the devices. The amp was gotten from Freecycle and the only faults with it were a damaged phono socket, and a failed 7824 regulator that powered the protection circuit.

[sakis]

Originally Posted by jaycee

Sadly not... my PM-35 amp works pretty well though with 30mA bias through the devices. The amp was gotten from Freecycle and the only faults with it were a damaged phono socket, and a failed 7824 regulator that powered the protection circuit.

ok ...thanks .... i am in th proces of getting 20 of these which i found in a japanese shop .... i would like to see what is possible to do with them

[jaycee]

I could see output device failure killing them, but that is the same with pretty much any driver IC. I cannot complain about the sound of my Marantz though

[sakis]

will see ...about safety generaly ...

any way you slice it jaycee ...any amplifier at 100w or more without any protection or VI limmiters if pushed arround will eventually fail .......with the usual catastofic results ha ha ha

[sakis]

Originally Posted by jaycee

I could see output device failure killing them, but that is the same with pretty much any driver IC. I cannot complain about the sound of my Marantz though

looking at the datasheet i realized that recommended rail voltage is 52+52 volts ...though the specs of the ic is 70+70 volts ...

then again japanese designers prefer to use only 2 transistors and a nice VI limmiter

in the specs say that if 110w is to be produced 4 transistors requiered in the output ....fair enough i think since at 4 ohms you will probably look at 200w issues at least ( way too much for 2 transistors )