They look perfect. Well found.Would these work for C1? 100uF 35v 0.36Ohm ESR
I noticed that.Looks like Farnell are running their stock of LM329DZs down and out.
Might be worth keeping an eye on them.......
Cheers Andy.
Looking at the old BOM there are a few queries springing to mind.
Are more modern 3 pin regulators a simple drop in, assuming they are better?
Is the AD825 still the best bet or is a more modern chip better and a simple drop in? The AD825 is out of stock at Farnell anyway.
Cheers Andy.
The LM723, ancient thing it is, is still available, and cheap, and is a true buried-zener without the active circuitry wrapped around it (that makes the LM329 a bit more reactive than you might first think ...IME)
(yes I know the LM723 is a >45yr old, 14-pin DIP voltage regulator kit-on-a-chip dinosaur, but it is worth buying a few if only to use that true 6.9v buried-zener reference for fun. It is genuinely quiet. but no drop-in for the LM329 - mentioned only for the curious)
Drop the transformer in a bucket of varnish for a few days, then leave outside this summer...