On 14/01/2014 10:28, N_Cook wrote:
On 14/01/2014 10:10, Gareth Magennis wrote:
OK, to follow up on the "wrong parts sent by Behringer" thread,

I recently bought some TIP35C transistors from Farnell UK. Just before I
fitted one to an amplifier I thought I'd just check the pinouts.
Good job I did because instead of BCE they measured BEC.

Anyway I tried to order a different manufacturers part from the Farnel
website but ended up with more of the Mospecs.


Here is the weird bit:
I have 4 Mospec TIP35C in font of me with exactly the same batch
codes, they
are all identical and from the same source (Farnell)
3 of them meaure BEC, the fourth one measures the correct BCE pinout.
Measurement done numerous times on a Peak DCA50e component checker, and a
video made to send to Farnel who would not at first believe me.


How is this possible?



Cheers,


Gareth.



Even weirder I have some marked TIP35C, makers apparently MEV and ST,
check out as perhaps TIP36C, never used so no idea what the V/A ratings
are, came from Grandata . They were for background stock and when I went
to use one Grandata had gone bust.
I assume they must be a favorite for pirating. The labelling is not
obviously suspect, ie printing wipes off but "ST" ones are skew to the
body and MEV ones look more like paint than whatever usual marking
material is

(second attempt., ******* mozilla thunderbird)

closer looking at them . The bodies of "MEV" and "ST" are exactly the
same in minute detail, highly unlikely for different makers.
Guillotine imperfections in the heatsink stampings appear in exactly the
same place, the blow-hole? dimples in the encapsulation have the same
shiney appearance and matt for the rest of the body , two recesses each
side of the body show .5mm of the underlying heatsink, 2 tiny overspill
encapsulant splurges over the tab are the same etc