8 Jan
2017
8 Jan
'17
6:06 a.m.
On Sun, Jan 8, 2017 at 2:00 PM, Adrian Graham
<witchy at binarydinosaurs.co.uk> wrote:
You were right, I'd drawn out R335 wrongly and
flipped V333. All the anodes
go via R312 to the collector of V333 along with R309-R311. Base for V333 is
the inverted sync output of the MR9735. R322 is 6.8k
(blue-grey-black-brown). All diodes are 1N4148.
http://www.binarydinosaurs.co.uk/STCExecutelSyncCircuit2.jpg
That makes more sense. I am surprised that the anodes of the diodes don't go
to a +ve power line (maybe +12V), though. It could be right as drawn,
but I would
check it.
When you power up, what voltage and/or signal (use a 'scope) do you see on the
anodes of said diodes?
-tony
