I had a pair of ESP6's in the late 70's. Glorious sound, heavy (because of the transformer and voltage multiplier in each cup) and sweaty because of the fluid filled cups. And needs to be connected to the loudspeaker output of a power amp.
I could just about survive a side of a record, and then a break to let my head recover.
Any thoughts on the PZTA96ST1G ? Surface mount SOT223, PNP, 450V and 500mA. Downside is 1.5W power dissipation.
At least the darned thing is still available
KSA1156 is of course obsolete, alas. OnSemi seem hell bent on obsoleting anything remotely useful from the inventory of companies they acquired. If it does not go in a mobile phone, flat screen TV, PC or car or anything with huge volume, they lose interest real fast.
Any that are on eBay are >90% fakes
The bizarre thing with the Sanyo datasheet in the subject line says NPN, but the actual data is all negative going - which would only be the case for a pnp.
Of course all the AI data scrapers only consider the (incorrect) Sanyo tag line of NPN - and that forms the basis for every human on the web to propagate that nonsense.
Or the other way round - it matters not. As Kevin says - the 2sa1968 is a pnp
Eating humble pie. The original diagram was correct. I had to draw up the truth tables to convince myself!
Clearly very rusty now with Boolean logic. I used to be a dab hand.
The two captions on the bottom right are the wrong way round. The NOR gate in the bottom middle would do not(South or Africa) and the bottom right, a NAND gate would do not(South and Africa).