Driver transisters for BD609 and BD610-tandberg amp.

[ed]

Hi,
I need to identify drivers(i hope they are drivers ?....) for the
Motorola output transistors BD910 and BD909 of my Tandberg TR 2025 MB
amp(about +/-35v DC supply(2 speakers, 8 Ohms, 35w- although it can
output to 4 speakers).I could make out somewhat the markings on
one-(Motorola) MPS U05 or MPS 005 or MPS 006 or MPS U06.Can't make out
any markings on other 3 driver transistors.On above transistor(flat
case),the layout of pins is Collector-base-Emitter.The driver
transistors have an Aluminium heatsink and have 3 bars of horizontal
lines-green,Yellow,bluish.The collector of above driver transisor is
connected to collector of BD609.
Other transistors are (per channel): BC 548B(near heatsink), BC 548B,
BC447A, BC 557B, C828-C828, BC 547B, BD418(MOTOROLA-also has 3
bars),BC 447A and the 2 driver transistors.
The amp. may have been constructed in 1976.As output transistors have
blown,i intend to use BD909 and BD912(if possible)
Thanks
Ed
Trying to post into http://www.nrhf.no/phpBB2/index.php(all Norwegian)

 

[Dieter Wiedmann]

ed schrieb:

one-(Motorola) MPS U05 or MPS 005 or MPS 006 or MPS U06.

Often used driver transistors were MPS-U06/MPS-U56, possible
replacements are BD237/BD238.


Regards,
Dieter

 

[ed]

Thanks a lot mate.