awylie@pyr1.cs.ucl.ac.uk (07/01/88)
Hello,
this is an appeal for help from all you NetLanders out there,
especially those in the USA. I am very interested in point-contact
transistors and want to obtain some. About 1/2 million of them were made in
the period 1948-1956, and even though most were sold to the military, quite
a lot must have survived hidden in junk boxes and the like. To provide you
with some incentive :-) to root around in your junk, I will buy any of these
transistors which you can offer me, irrespective of their condition (you
won't get rich, though!).
Here's a list of all the point-contact types which I know were
manufactured - if you've got any of these, PLEASE let me know. If you have
any data sheets for these, please let me know. If you know ANYTHING AT ALL
about these devices, or know of any other point-contact types, I would
like to hear from you. Please pass on this message to anyone that you think
might have any ancient transistorized equipment or components. Thanks in
advance for any help that you can offer,
Andrew.
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Andrew Wylie, University of London Computer Centre,
20 Guilford Street, London WC1N 1DZ, England.
uucp: andrew%uk.ac.ulcc.ncdlab@nss.cs.ucl.ac.uk
arpa: andrew%ncdlab.ulcc.ac.uk@cunyvm.cuny.edu
BITNET: andrew@ncdlab.ulcc.ac.uk
JANET: andrew@uk.ac.ulcc.ncdlab
If all else fails and you can't reach me by e-mail, airmail is actually
quite fast and reliable!
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My list of ALL(!) the point-contact transistors ever made
Amperex OC50, OC51
CBS-Hytron PT-2A, PT-2S
General Electric G11, G11A, SX4A, Z2, 2N30, 2N31
Hydro-Aire A-0, A-1, A-2, A-3, S-0, S-1, S-2
Nat'l Union Electr T18A, T18B
Radio Receptor R1698, R1729, R1734
Raytheon CK716
RCA 2N32, 2N33, TA165K, TA166, TA172
Sprague Electric 5A, 2N159
Sylvania 2N32, 2N33, 3N21(tetrode!)
Texas Instruments 100, 101, 102, 103
Transistor Products 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2L
2N32, 2N33, 2N50, 2N51, 2N52, 2N53
Western Electric 2A, 3A(photodiode), A1698, A1723, A1729, A1768, AN2891
2N21, 2N21A, 2N22, 2N23, 2N24, 2N25, 2N26
2N67, 2N110
Bell Labs BL115, M1689, M1698, M1729, M1734, M1768, M1832
1698, 1729, 1734, 1768
Westinghouse WX3347, WX4811, WX4812
Unknown 2N72
GEC (England) EW51, EW61, GET1, GET2
LCT (France) 3698, 3768
Mullard (England) OC50, OC51
SAF (Germany) VS220
STC (England) LS737, TP1, TP2, 3X/100N, 3X/101N
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