TIA.
I have three transistors that I have been unable to identify.
I understand that the 185 prefix identifies the chips as Motorola and I think that the MEX means that they are made in Mexico.
All of the markings on chip 1 (T03 package)
All of the markings on chip 2 (T03 package)
All of the markings on chip 3
Can anyone help?
1853 and 1854 look like Hewlett Packard Numbers. the 4-892 is probably as well. My cross reference list does not have the 1853-0511. and the 1854-0774 I can't read. it looks like 2N6056. Sorry Colin
well.
Colin
Thanks Colin. OK I forgot to tell you that I grabbed the components out of an old HP pen plotter. The 4 on the 1854-0774 and the 11 on the 1853-0511 look like they were added after the other numbers (type spacing and thickness of font).
These are all HP part #s. 4-892 is probably shorthand for 1854-0892, which is what they did when the part was too small for the whole number.
Not on my list
2N6056
not on my list
------------------------------------------------ Jim Adney snipped-for-privacy@vwtype3.org Madison, WI 53711 USA
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On Sat, 2 Jul 2005 20:36:16 +1000, "Pier Federici" put finger to keyboard and composed:
Could 1853-0511 be the PNP complement to the 2N6056, ie a 2N6054? Does it test as a PNP Darlington? Were these transistors driving the XY motors?
- Franc Zabkar
as well.
pen
added
Thanks for the help guys. Yes the circuit drove the X and Y axis motors and the pen up and down. Pier
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