TT series transistors were made by STC in Australia in the 60's - 70's era so the chance of any datasheet website having documentation is nil. Only techs from Aus will have come across them.
Specifically looking for data on TT403, a PNP TO5 can type, but other types also welcome.
Thanks for any help you can give...
"Ross Herbert"
** The TT800 ( NPN ) and TT801 (PNP) were among my personal favourites from about 1971 to 1978.TO5 pack,
Vce = 80 volts
Ic = 1.0 amps
hfe = 100
Ft = 40 MHz
Pd = 1 watt.
IIRC
" I lived through the 70s and remember it all ..... unfortunately ".
....... Phil
Just *curious*, Phil, were you ever able to track down the issue with that vile Ashdown amp?
Hmmm. Pity
** Err - you mean the "Fallen Angel 60 " ???
PCB leakage was identified as the source of the hum problem & I ended up cutting the tracks running to pin 7 of each of the input tubes and replacing them with silicon coated wire links. Also, I added extra filtering after the bridge with two 150 uF, 400 volt electros in series glued to the hassis - increasing the capacitance from 24 uF to 100uF. That did the trick.
Interestingly, the owner was an American girl named "Cadence" who referred to the amp as " my baby " !!
....... Phil
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