ITS1276 dual transistor Data Sheet or equivalent transistor

Thread Starter

RetroSoundTech

Joined Dec 6, 2020
2
Hi,
I'm searching for a ITS1276 dual 6 leg transistor datasheet from circa 1976, looks like a TO-18 package, its used in the exponential converter of the Roland System 100-101 synthesizer VCF.

Cheers
Chris
 

dl324

Joined Mar 30, 2015
14,458
Welcome to AAC!

ITS1276 dual 6 leg transistor datasheet from circa 1976, looks like a TO-18 package
I don't think they had any dual transistors in TO-18; only TO-71 and TO-78. Do you have a datasheet?

Found this reference:
https://ua726.co.uk/2013/06/17/roland-system-100-vcf-archaeology/

The guy says he substituted matched 2SC945 and thought it was working. 2SC945 equivalents seem to be 2N3904 or BC546. Those are general purpose transistors. But the pinouts for 2N and BC transistors are both different than 2SC and different from each other unless you get some reverse pinout devices.
 
Last edited:

Thread Starter

RetroSoundTech

Joined Dec 6, 2020
2
Welcome to AAC!

I don't think they had any dual transistors in TO-18; only TO-71 and TO-78. Do you have a datasheet?

Found this reference:
https://ua726.co.uk/2013/06/17/roland-system-100-vcf-archaeology/

The guy says he substituted matched 2SC945 and thought it was working. 2SC945 equivalents seem to be 2N3904 or BC546. Those are general purpose transistors. But the pinouts for 2N and BC transistors are both different than 2SC and different from each other unless you get some reverse pinout devices.
Hi Dennis,
Thanks, I have the ua726 source and know about his substitution. I make original repairs where ever I can I have several synths that need this transistor and so I'm looking for the datasheet to see the original specs and then find an equiv.

Also can confirm its a TO-71

Cheers
Chris
 
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