In article
,
"Frank Dresser" wrote:

"David" wrote in message
...
Every Halli I've ever seen was rather crudely built. The front
panels may be nice but the wiring looks kind of amateurish compared
to a Fender amp or a MacIntosh from the same era.


Phil Nelson has some pictures of the insides of his SX-88 on his
website:

http://antiqueradio.org/halli09.htm

Actually, I kinda prefer the rat's nest wiring approach. Lining up
the wires and components neatly almost certainly increases the
inter-component capacitance and I don't mind if they spent the money
where it can be seen rather than hidden away.

The straight line point to point is the shortest distance between,
which the axial components must reach. This is done to reduce the
inductance of the path and yes if the paths are not parallel to each
other then mutual inductance is also reduced between them. If the
parasitic inductance of the component paths is to high then the
circuits will not work.

There are many techniques to reduce parasitic inductance like grounding
rings around tube sockets. If a resistor to ground is needed to bias a
tube element then it is a short distance from the tube pin to ground.

The higher in frequency the circuits must operate the more critical it
is to keep this stray inductance in check.

--
Telamon
Ventura, California