OLD Ex workshop spare parts and small manufacturing stock
Make no mistake, we are talking late 1960's ~ 1970's on this one - removed from equipment years ago and safely stored away "just in case" it was ever needed
These are some of my very old semiconductors, although I believe they are not only museum pieces but "pedal freaks" like to play around with these as well - whatever the purpose, seems such a crime to send them off to waste disposal ...
With these old devices (because I like to be sure and others have asked me for some basic testing to be done) I have grabbed a very basic transistor tester and the screen result is showing along with the device. The hFE measurement (DC current gain) has been printed onto the device casing, this is only a rough guide as the hFE will change depending upon temperature and Vce conditions.
If it is important for you to have particular devices (for matching as an example), please let me know which one(s) you would like to be supplied with, using the hFE as the reference.
UNIDENTIFIED MANUFACTURER - Small Signal Output Transistor
Mullard, Philips, Valvo and others made these but the casing is not manufacturer marked
Type: OC74
Glass with Silver metallic outer case/heatsink
Germanium
PNP
Commonly used in low voltage, small signal audio output applications around 50 years ago!
Manufacturers indicated hFE 65 ~ 100
Tested hFE's: 62,75,98,113
Full part # on package OC74 (no manufacturer logo) G (On the top of the case) A3 Y9 (Faint Red - probably batch code)
RD6X15 case
BRAND NEW Old Stock
Clean legs
*** Where the photograph shows multiple devices, this advertisement is for ONE device not all that are shown!
