On Mar 2, 9:39*pm, Nick Gorham wrote:
Andre Jute wrote:
A star ground is just a circular bus or a very short bus. Grounding is
is tricky and tiresome in inverse proportion to the amount of thought
you give it, so I do something between what Iain does and what Patrick
does, and I call it a "star-point". Here you can see my star point
http://members.lycos.co.uk/fiultra/K...0T68MZ417A.jpg
on my T68bis "Minus Zero" amp. It is the short piece of stiff wire
sticking up at the right hand side of the aluminium cased resistor
behind the battery boxes in the centre of the top right hand
photograph. It's the bleeder resistor to the power supply and the star
point is at its 0V end. Notice how the convenitonally drawn schematic
http://members.lycos.co.uk/fiultra/t...17acircuit.jpg
Given the topic of the thread, shouldn't the ground commection under the
rectifier be after the choke, not before?
--
Nick
I published a wiring diagram as well. If you wire as instructed for
this little amp, all 0V ends are led directly to a single point. In
that case it doesn't matter where the earth is shown on the circuit
diagram (on which there isn't space to show the star point) because
there is a wiring schemo as well.
HTH.
Andre Jute
Visit Jute on Amps at
http://members.lycos.co.uk/fiultra/
"wonderfully well written and reasoned information
for the tube audio constructor"
John Broskie TubeCAD & GlassWare
"an unbelievably comprehensive web site
containing vital gems of wisdom"
Stuart Perry Hi-Fi News & Record Review