04-04-2014, 03:15 PM
Ron, I found the schematic of the 700-T and looks like the output stage supply rail is + 65V. That's a bit high for the 2N3055, but ON semiconductor makes a higher voltage version as the MJ15015G. Its rated for a Vce of 120V which leaves plenty of safety margin.
http://www.onsemi.com/pub_link/Collateral/2N3055A-D.PDF
Its a versatile NPN silicon output, and can replace any similar style transistor in a vintage receiver or amp. There is also a matching PNP complement available.
Mouser has them in stock at $2.85 in single unit quantity, or $2.30 in lots of 10. If you are considering doing more amp repairs, you might consider getting a bunch of these to have on hand.
http://www.onsemi.com/pub_link/Collateral/2N3055A-D.PDF
Its a versatile NPN silicon output, and can replace any similar style transistor in a vintage receiver or amp. There is also a matching PNP complement available.
Mouser has them in stock at $2.85 in single unit quantity, or $2.30 in lots of 10. If you are considering doing more amp repairs, you might consider getting a bunch of these to have on hand.
