Substitute in Parasound 2SC3423-O or 2SC3423-Y and 2SA1360-O or 2SA1360-Y for unavailable 2SC3423/2SA1360 ?

[itz_all_about_the_music]

I'm wanting to replace 2SC3423 and complimentary 2SA1360 in a Parasound input stage (with a somewhat random oscillatory symptom). They seem to no longer be available but 2SC3423-O, 2SC3423-Y are, as are

I've read this "The 2SC3423 transistor can have a current gain of 80 to 240. The gain of the 2SC3423-O will be in the range from 80 to 160, for the 2SC3423-Y it will be in the range from 120 to 240."

Similarly, I've read "The 2SA1360 transistor can have a current gain of 80 to 240. The gain of the 2SA1360-O will be in the range from 80 to 160, for the 2SA1360-Y it will be in the range from 120 to 240."

Would these be plug'n play substitutes? The target circuit is shown in the attached pic.
Should other substitutes be considered instead?

 

[Nisbeth]

It's the same device, and if you look at the Parasound originals there's probably a gain grade specified on the devices as well, even if Parasound did not put it in the schematic.

 

[itz_all_about_the_music]

Nisbeth,

Got it. I mistakenly thought there were such parts without ANY suffix in addition to the Y and/or C variants. I see now, with your advice, that they are both the Y variant.

Thanks.