"Alex Pogossov"
** Ever heard of " trimming " ???
The burst generator may be useful, but the design is arcane... like we are
not in 2013, but probably in 1963.
Attached is a simpler and much cheaper circuit. Cheaper than a CD
** What a blatant, stupid LIE.
possibly more convenient than fiddling with audio files editing on a PC.
http://www.valveradio.net/en/home/au...generator.html
** That POS will never do the job properly - you must have zero crossing
switching at both ends of a burst and an equal number of positive and
negative half cycles.
A test CD will give you that plus standard conditions for burst frequency,
length and repetition rate.
None of which matters one a HOOT to a hobbyist audiophile.
Cos he can use music programme and a scope to see what is really going on.
..... Phil