I’ve finally given up on the BeoGram4000… The BC144s never arrived, but did manage to source some from elsewhere..
After a while, I checked the voltage regulator cct – and found that it had blown, which is why I was taking out so many motor control transistors ! Replaced the voltage regulator, and all seemed to finally working correctly ! 5 mins later everything blew again…
Time to shelve it…
Now concentrating on my BeoGram 6000, which has a tracking problem, but otherwise is good..
Update: on 29th of Nov, I ordered 4 new BC144’s on eBay (from Italy) – He sent them tracked on 2nd Dec, they arrived in UK on 5th… Still not been delivered.