MU9611 MU9661 can't find info or equivalents

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Powerphase

New Member

• Dec 28, 2023

• #1

Hi can anyone give the pinouts and equivalents for the pair of Motorola audio output transistors MU9611 and MU9661 please. Cannot find any info or source at all, thanks, Barney.

 

rjenkinsgb

Well-Known Member

Most Helpful Member

• Dec 28, 2023

• #2

There is information in this booklet - the basic specifications are near the top of page 105:

https://worldradiohistory.com/UK/Electronics-Today-UK/Electronics-Today-Circuits-1976-11-No-1.pdf

The data extract in that does not appear to have the "152-01" pinout data, unfortunately.

 

rjenkinsgb

Well-Known Member

Most Helpful Member

• Dec 28, 2023

• #3

It appears a 2SC6144 + 2SA2222 would be suitable electrical replacements, they have compatible characteristics, though the package & pinouts are likely different.

They are obsolete, but appear to still be readily available.

eg.

2SA2222/2SC6144 Transistor Pair for Epson printers A2222 C6144 TO-220F –ref:798 | eBay

2SA2222 is Bipolar Transistor -50V -10A VCE(sat);-500mV max. PNP Single TO-220F-3FS for High-Current Switching Applications.

www.ebay.co.uk

 

Inquisitive

Super Moderator

• Dec 28, 2023

• #4

Wow, research skills that are pre-internet.

Take that Google

 

P

Powerphase

New Member

• Dec 28, 2023

• #5

Thanks for that prompt reply, still have the undamaged pair so can work out the connections and will order two new pairs. Will be much appreciated by friends wife who can have her favourite retro record player back! Best regards, Barney.