ISO: TIPL757A transistor or equivalent
derschjo at gmail.com
Mon Jan 22 13:18:50 CST 2018
Hi all --
I'm in the middle of repairing a console for a Symbolics 3640. This uses
the earlier Phillips-based monitor and it employs a TIPL757A transistor in
the deflection circuit. The one in mine is toast and I haven't been able
to find a suitable replacement.
The datasheet (or at least a page of it) is here:
The base current rating seems to be important in this application; I tried
replacing it with a BUX48 (which meets the other specs but only has a 4A
continuous base current rating) and it blew in a few minutes. I haven't
found a source of 757As, and I haven't found another TO-3 transistor that
matches its specifications.
If anyone's sitting on a pile of these, knows a good source for them, or
knows of a transistor to substitute, please let me know.
More information about the cctalk